introduce typography system and motion module

crates/chat_ui/src/lib.rs

@@ -24,7 +24,7 @@ use smallvec::{SmallVec, smallvec};
 use state::{
     FileAttachment, NostrRegistry, download_and_decrypt_to_file, upload, upload_encrypted,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
@@ -903,7 +903,7 @@ impl ChatPanel {
                             h_flex()
                                 .h_10()
                                 .justify_center()
-                                .text_sm()
+                                .text_style(TextStyle::Callout)
                                 .bg(cx.theme().surface_raised)
                                 .rounded(px(theme::panel_radius()))
                                 .child("Message isn't traced yet"),
@@ -918,10 +918,10 @@ impl ChatPanel {
                                     h_flex()
                                         .h_7()
                                         .px_2()
-                                        .gap_2()
+                                        .gap(px(theme::SPACE))
                                         .bg(cx.theme().surface_raised)
                                         .rounded(px(theme::control_radius()))
-                                        .text_sm()
+                                        .text_style(TextStyle::Callout)
                                         .child(div().size_1p5().rounded_full().bg(gpui::green()))
                                         .child(SharedString::from(url.to_string())),
                                 );
@@ -950,10 +950,10 @@ impl ChatPanel {
                             h_flex()
                                 .h_7()
                                 .px_2()
-                                .gap_2()
+                                .gap(px(theme::SPACE))
                                 .bg(cx.theme().surface_raised)
                                 .rounded(px(theme::control_radius()))
-                                .text_sm()
+                                .text_style(TextStyle::Callout)
                                 .child(div().size_1p5().rounded_full().bg(gpui::green()))
                                 .child(SharedString::from(url.to_string())),
                         );
@@ -990,7 +990,7 @@ impl ChatPanel {
             .items_center()
             .justify_center()
             .text_center()
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .text_color(cx.theme().text_faint)
             .line_height(relative(1.3))
             .child(
@@ -1013,7 +1013,7 @@ impl ChatPanel {
                 h_flex()
                     .w_full()
                     .gap_3()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(
                         h_flex()
                             .flex_shrink_0()
@@ -1201,7 +1201,7 @@ impl ChatPanel {
             .flex()
             .flex_row()
             .flex_wrap()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .children({
                 let mut items = vec![];
 
@@ -1245,7 +1245,7 @@ impl ChatPanel {
                     .px_2()
                     .border_l_2()
                     .border_color(cx.theme().element_active)
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(div().font_semibold().child(author.name()))
                     .child(
                         div()
@@ -1287,11 +1287,11 @@ impl ChatPanel {
                     .unwrap_or(false);
 
                 h_flex()
-                    .gap_2()
+                    .gap(px(theme::SPACE))
                     .py_0p5()
                     .px_1()
                     .rounded(px(theme::control_radius()))
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .border_1()
                     .when(has_reacted, |this| {
                         this.text_color(cx.theme().text)
@@ -1361,12 +1361,12 @@ impl ChatPanel {
         let avatar = profile.avatar();
 
         v_flex()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .w_full()
             .child(
                 h_flex()
-                    .gap_2()
-                    .text_sm()
+                    .gap(px(theme::SPACE))
+                    .text_style(TextStyle::Callout)
                     .child(SharedString::from("Sent to:"))
                     .child(
                         h_flex()
@@ -1384,7 +1384,7 @@ impl ChatPanel {
                         .p_1()
                         .h_16()
                         .w_full()
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .rounded(px(theme::surface_radius()))
                         .bg(cx.theme().warning_muted)
                         .text_color(cx.theme().warning)
@@ -1394,7 +1394,7 @@ impl ChatPanel {
             .when_some(report.output().cloned(), |this, output| {
                 this.child(
                     v_flex()
-                        .gap_2()
+                        .gap(px(theme::SPACE))
                         .w_full()
                         .children({
                             let mut items = Vec::with_capacity(output.failed.len());
@@ -1409,14 +1409,14 @@ impl ChatPanel {
                                         .bg(cx.theme().danger.opacity(0.06))
                                         .child(
                                             div()
-                                                .text_xs()
+                                                .text_style(TextStyle::Caption)
                                                 .font_semibold()
                                                 .line_height(relative(1.25))
                                                 .child(SharedString::from(url.to_string())),
                                         )
                                         .child(
                                             div()
-                                                .text_xs()
+                                                .text_style(TextStyle::Caption)
                                                 .text_color(cx.theme().danger_muted.opacity(0.9))
                                                 .line_height(relative(1.25))
                                                 .child(SharedString::from(msg.to_string())),
@@ -1439,14 +1439,14 @@ impl ChatPanel {
                                         .bg(cx.theme().surface_card)
                                         .child(
                                             div()
-                                                .text_xs()
+                                                .text_style(TextStyle::Caption)
                                                 .font_semibold()
                                                 .line_height(relative(1.25))
                                                 .child(SharedString::from(url.0.to_string())),
                                         )
                                         .child(
                                             div()
-                                                .text_xs()
+                                                .text_style(TextStyle::Caption)
                                                 .line_height(relative(1.25))
                                                 .child(SharedString::from("Successfully")),
                                         ),
@@ -1642,7 +1642,7 @@ impl ChatPanel {
             .self_start()
             .items_start()
             .min_w_0()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .p_2()
             .border_1()
             .border_color(cx.theme().border_faint)
@@ -1652,11 +1652,11 @@ impl ChatPanel {
                 v_flex()
                     .min_w_0()
                     .overflow_hidden()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(div().line_height(relative(1.2)).child(file.display_name()))
                     .child(
                         div()
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .text_color(cx.theme().text_faint)
                             .child(label),
                     ),
@@ -1702,7 +1702,7 @@ impl ChatPanel {
                             .border_1()
                             .border_color(cx.theme().border_faint)
                             .bg(cx.theme().surface)
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .text_center()
                             .child("Preview not available"),
                     )
@@ -1764,7 +1764,7 @@ impl ChatPanel {
                                 .flex()
                                 .items_baseline()
                                 .gap_1()
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().text_muted)
                                 .child("Replying to:")
                                 .child(div().text_color(cx.theme().accent).child(profile.name())),
@@ -1785,7 +1785,7 @@ impl ChatPanel {
                 .child(
                     div()
                         .w_full()
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .text_ellipsis()
                         .line_clamp(1)
                         .child(text.preview()),
@@ -1881,12 +1881,17 @@ impl Panel for ChatPanel {
 
                 h_flex()
                     .gap_1()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .child(Avatar::new(picture).seed(seed).xsmall())
                     .child(label)
                     .into_any_element()
             })
-            .unwrap_or(div().text_xs().child("Unknown").into_any_element())
+            .unwrap_or(
+                div()
+                    .text_style(TextStyle::Caption)
+                    .child("Unknown")
+                    .into_any_element(),
+            )
     }
 
     fn toolbar_buttons(&self, _window: &Window, _cx: &App) -> Vec<Button> {
@@ -1933,10 +1938,10 @@ impl Render for ChatPanel {
                         .h_12()
                         .w_full()
                         .px_2()
-                        .gap_2()
+                        .gap(px(theme::SPACE))
                         .border_b_1()
                         .border_color(cx.theme().border)
-                        .child(Input::new(&self.subject_input).text_sm().small())
+                        .child(Input::new(&self.subject_input).small())
                         .child(
                             Button::new("change")
                                 .icon(IconName::CheckCircle)
@@ -1989,7 +1994,7 @@ impl Render for ChatPanel {
                         this.child(
                             div()
                                 .px_1()
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().warning)
                                 .child(WARNING),
                         )

crates/nip29_ui/src/details.rs

@@ -3,7 +3,7 @@ use gpui::{
     relative,
 };
 use nip29::{Group, GroupMetadata};
-use theme::{ActiveTheme, control_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, control_radius};
 use ui::avatar::Avatar;
 use ui::{Sizable, StyledExt, WindowExtension, h_flex, v_flex};
 
@@ -22,7 +22,7 @@ fn body(group: &WeakEntity<Group>, cx: &App) -> AnyElement {
     };
 
     let group = entity.read(cx);
-    let mut body = v_flex().gap_3().text_sm().child(header(group, cx));
+    let mut body = v_flex().gap_3().text_style(TextStyle::Callout).child(header(group, cx));
 
     if let Some(metadata) = group.metadata() {
         if let Some(about) = metadata.about.as_ref() {
@@ -137,14 +137,14 @@ fn header(group: &Group, cx: &App) -> AnyElement {
                 .min_w_0()
                 .child(
                     div()
-                        .text_base()
+                        .text_style(TextStyle::Body)
                         .font_semibold()
                         .truncate()
                         .child(group.display_name()),
                 )
                 .child(
                     div()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_color(cx.theme().text_faint)
                         .truncate()
                         .child(SharedString::from(format!(
@@ -162,7 +162,7 @@ fn section(label: &'static str, content: AnyElement, cx: &App) -> AnyElement {
         .gap_1()
         .child(
             div()
-                .text_xs()
+                .text_style(TextStyle::Caption)
                 .font_medium()
                 .text_color(cx.theme().text_muted)
                 .child(label),
@@ -186,7 +186,7 @@ fn chip(label: impl Into<SharedString>, cx: &App) -> AnyElement {
         .rounded(px(control_radius()))
         .bg(cx.theme().surface_raised)
         .text_color(cx.theme().text)
-        .text_xs()
+        .text_style(TextStyle::Caption)
         .line_height(relative(1.))
         .child(label.into())
         .into_any_element()

crates/nip29_ui/src/invite.rs

@@ -5,7 +5,7 @@ use gpui::{
 };
 use nip29::Group;
 use nostr_sdk::prelude::SecretKey;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::dialog::DialogButtonProps;
 use ui::input::InputState;
 use ui::notification::Notification;
@@ -40,7 +40,7 @@ pub(crate) fn open(group: WeakEntity<Group>, window: &mut Window, cx: &mut App)
             .child(
                 v_flex().gap_3().child(
                     div()
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .text_color(cx.theme().text_muted)
                         .child("Share the code with whoever should be able to join. The relay must accept it."),
                 )

crates/nip29_ui/src/lib.rs

@@ -16,7 +16,7 @@ use serde::Deserialize;
 use settings::AppSettings;
 use smallvec::{SmallVec, smallvec};
 use state::{NostrRegistry, upload};
-use theme::{ActiveTheme, control_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, control_radius};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariant, ButtonVariants};
 use ui::dialog::DialogButtonProps;
@@ -168,7 +168,7 @@ pub fn confirm_leave(group: WeakEntity<Group>, window: &mut Window, cx: &mut App
             )
             .child(
                 div()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child("You will stop receiving messages from this group."),
             )
             .on_ok(move |_event, _window, cx| {
@@ -567,10 +567,10 @@ impl GroupPanel {
         h_flex()
             .flex_shrink_0()
             .w_full()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .px_3()
             .py_2()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .border_b_1()
             .border_color(cx.theme().border)
             .child(
@@ -617,7 +617,7 @@ impl GroupPanel {
                     .py_0p5()
                     .rounded(px(control_radius()))
                     .bg(cx.theme().solid)
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child(pin_label(group, pin))
             }))
@@ -695,10 +695,10 @@ impl GroupPanel {
             .w_full()
             .justify_center()
             .items_center()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .px_3()
             .py_2()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .text_color(cx.theme().text_muted);
 
         match notice {
@@ -880,7 +880,7 @@ impl GroupPanel {
                     .border_1()
                     .border_color(cx.theme().border_faint)
                     .rounded(px(control_radius()))
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child(Icon::new(IconName::Link).xsmall())
                     .child(
@@ -922,12 +922,12 @@ impl Panel for GroupPanel {
 
                 h_flex()
                     .gap_1()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .child(Avatar::from_source(picture).seed(seed).xsmall())
                     .child(display_name(group))
                     .into_any_element()
             })
-            .unwrap_or_else(|| div().text_xs().child("Unknown").into_any_element())
+            .unwrap_or_else(|| div().text_style(TextStyle::Caption).child("Unknown").into_any_element())
     }
 
     fn toolbar_buttons(&self, _window: &Window, _cx: &App) -> Vec<Button> {
@@ -987,7 +987,7 @@ impl Render for GroupPanel {
                                     None => h_flex()
                                         .size_full()
                                         .justify_center()
-                                        .text_sm()
+                                        .text_style(TextStyle::Callout)
                                         .text_color(cx.theme().text_faint)
                                         .child("No messages yet")
                                         .into_any_element(),

crates/nip29_ui/src/message.rs

@@ -9,7 +9,7 @@ use nip29::{Activity, Group};
 use nostr_sdk::prelude::{EventId, Kind};
 use person::PersonRegistry;
 use settings::AppSettings;
-use theme::{ActiveTheme, bubble_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, bubble_radius};
 use ui::avatar::Avatar;
 use ui::menu::{ContextMenu, PopupMenu, PopupMenuItem};
 use ui::message::MessageRow;
@@ -138,7 +138,7 @@ pub(crate) fn render_activity(ix: usize, activity: &Activity, cx: &App) -> AnyEl
     h_flex()
         .id(ix)
         .w_full()
-        .gap_2()
+        .gap(px(theme::SPACE))
         .py_1()
         .px_3()
         .hover(|this| this.bg(cx.theme().element_hover))
@@ -155,7 +155,7 @@ pub(crate) fn render_activity(ix: usize, activity: &Activity, cx: &App) -> AnyEl
             div()
                 .min_w_0()
                 .truncate()
-                .text_sm()
+                .text_style(TextStyle::Callout)
                 .font_semibold()
                 .child(subject.name()),
         )
@@ -163,7 +163,7 @@ pub(crate) fn render_activity(ix: usize, activity: &Activity, cx: &App) -> AnyEl
             div()
                 .min_w_0()
                 .truncate()
-                .text_sm()
+                .text_style(TextStyle::Callout)
                 .text_color(cx.theme().text_faint)
                 .child(SharedString::from(action(activity))),
         )
@@ -171,7 +171,7 @@ pub(crate) fn render_activity(ix: usize, activity: &Activity, cx: &App) -> AnyEl
             div()
                 .flex_shrink_0()
                 .ml_1()
-                .text_xs()
+                .text_style(TextStyle::Caption)
                 .text_color(cx.theme().text_faint)
                 .child(activity.created_at.to_ago()),
         )
@@ -225,7 +225,7 @@ fn media(media: &[SharedUri], cx: &App) -> AnyElement {
         .flex()
         .flex_row()
         .flex_wrap()
-        .gap_2()
+        .gap(px(theme::SPACE))
         .children(media.iter().enumerate().map(|(ix, item)| {
             div().id(format!("media-{ix}")).child(
                 img(item.clone())

crates/nip29_ui/src/metadata.rs

@@ -1,4 +1,4 @@
-use gpui::{App, AppContext, Entity, ParentElement, Styled, WeakEntity, Window};
+use gpui::{App, AppContext, Entity, ParentElement, Styled, WeakEntity, Window, px};
 use nip29::{Group, GroupMetadata};
 use ui::dialog::DialogButtonProps;
 use ui::input::InputState;
@@ -73,7 +73,7 @@ pub(crate) fn open(group: WeakEntity<Group>, window: &mut Window, cx: &mut App)
                     .child(field("Picture", &picture, cx))
                     .child(
                         v_flex()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .child(
                                 Switch::new("private")
                                     .label("Private")

crates/nip29_ui/src/util.rs

@@ -2,7 +2,7 @@ use anyhow::Result;
 use gpui::{App, Div, Entity, ParentElement, SharedString, Styled, Task, Window};
 use nip29::{Group, Pin, Row};
 use nostr_sdk::prelude::Url;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::input::{Input, InputState};
 use ui::notification::Notification;
 use ui::{WindowExtension, v_flex};
@@ -52,7 +52,7 @@ pub(crate) fn opens_run(rows: &[Row], index: usize) -> bool {
 pub(crate) fn field(label: &'static str, input: &Entity<InputState>, cx: &App) -> Div {
     v_flex()
         .gap_1()
-        .text_sm()
+        .text_style(TextStyle::Callout)
         .text_color(cx.theme().text_muted)
         .child(label)
         .child(Input::new(input))

crates/nip4e/src/lib.rs

@@ -15,7 +15,7 @@ use person::PersonRegistry;
 use settings::AppSettings;
 use smallvec::{SmallVec, smallvec};
 use state::{Announcement, CLIENT_NAME, NostrRegistry, UniversalSigner};
-use theme::{ActiveTheme, control_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, control_radius};
 use ui::avatar::Avatar;
 use ui::button::Button;
 use ui::notification::{Notification, NotificationKind};
@@ -720,25 +720,25 @@ impl DeviceRegistry {
             .title("Encryption Key Request")
             .content(move |_this, _window, cx| {
                 v_flex()
-                    .gap_2()
-                    .text_sm()
+                    .gap(px(theme::SPACE))
+                    .text_style(TextStyle::Callout)
                     .child(
                         div()
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .line_height(relative(1.25))
                             .child(SharedString::from(MSG)),
                     )
                     .child(
                         v_flex()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .child(
                                 v_flex()
                                     .gap_1()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child(
                                         div()
                                             .font_semibold()
-                                            .text_xs()
+                                            .text_style(TextStyle::Caption)
                                             .text_color(cx.theme().text_muted)
                                             .child(SharedString::from("From:")),
                                     )
@@ -751,7 +751,7 @@ impl DeviceRegistry {
                                             .bg(cx.theme().surface_card)
                                             .child(
                                                 h_flex()
-                                                    .gap_2()
+                                                    .gap(px(theme::SPACE))
                                                     .child(
                                                         Avatar::new(profile.avatar())
                                                             .seed(profile.avatar_seed())
@@ -764,11 +764,11 @@ impl DeviceRegistry {
                             .child(
                                 v_flex()
                                     .gap_1()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child(
                                         div()
                                             .font_semibold()
-                                            .text_xs()
+                                            .text_style(TextStyle::Caption)
                                             .text_color(cx.theme().text_muted)
                                             .child(SharedString::from("Code:")),
                                     )

crates/theme/src/lib.rs

@@ -14,6 +14,7 @@ mod platform_kind;
 mod scrollbar_mode;
 mod syntax;
 mod theme;
+mod typography;
 
 pub mod appearance;
 
@@ -38,6 +39,9 @@ pub use platform_kind::PlatformKind;
 pub use scrollbar_mode::*;
 pub use syntax::{HighlightKind, SyntaxPalette};
 pub use theme::*;
+pub use typography::{
+    DEFAULT_BASE_TEXT_SIZE, Metrics, TextStyle, Typeset, base_text_size, set_base_text_size,
+};
 
 /// Which appearance the app is painting. Bezel names this enum `Appearance`;
 /// coop's `ThemeMode` predates the port and carries the same two variants.
@@ -78,6 +82,7 @@ pub trait AppExt {
     fn set_brand(&mut self, brand: Brand);
     fn set_palette(&mut self, build: PaletteBuilder);
     fn set_appearance_mode(&mut self, mode: AppearanceMode);
+    fn set_base_text_size(&mut self, points: f32);
 }
 
 impl AppExt for App {
@@ -94,6 +99,11 @@ impl AppExt for App {
     fn set_appearance_mode(&mut self, mode: AppearanceMode) {
         appearance::set_mode(mode, self);
     }
+
+    fn set_base_text_size(&mut self, points: f32) {
+        typography::set_base_text_size(points);
+        self.refresh_windows();
+    }
 }
 
 /// Re-install the palette for the current appearance.
@@ -123,12 +133,12 @@ pub fn sync_base(cx: &mut App) {
         ScrollbarMode::Always => gpui_base::ScrollbarMode::Always,
     };
     let colors = theme.colors;
-    let font_family = theme.font_family.clone();
+    let font_sans = theme.font_sans.clone();
 
     let base = gpui_base::Theme::global_mut(cx);
     base.appearance = appearance;
     base.scrollbar = base.scrollbar.clone().with_mode(scrollbar_mode);
-    base.tokens.typography.sans = font_family;
+    base.tokens.typography.sans = font_sans;
 
     let tokens = &mut base.tokens.colors;
     tokens.background = colors.bg;
@@ -166,10 +176,8 @@ impl ActiveTheme for App {
 pub struct Theme {
     pub colors: ThemeColors,
     pub mode: ThemeMode,
-    pub font_family: SharedString,
-    pub font_body: SharedString,
+    pub font_sans: SharedString,
     pub font_mono: SharedString,
-    pub font_size: Pixels,
     pub shadow: bool,
     pub scrollbar_mode: ScrollbarMode,
     pub notification: NotificationSettings,
@@ -272,16 +280,14 @@ impl Default for Theme {
         let platform = PlatformKind::platform();
         let mode = ThemeMode::default();
 
-        // Define the font family based on the platform.
-        let font_family = match platform {
+        // The system UI font, by platform.
+        let font_sans = match platform {
             PlatformKind::Linux => "Inter",
             _ => ".SystemUIFont",
         };
 
         Self {
-            font_size: px(15.),
-            font_family: font_family.into(),
-            font_body: font_family.into(),
+            font_sans: font_sans.into(),
             font_mono: system_mono().into(),
             shadow: true,
             scrollbar_mode: ScrollbarMode::default(),

crates/theme/src/typography.rs

@@ -0,0 +1,131 @@
+use std::sync::atomic::{AtomicU32, Ordering};
+
+use gpui::{FontWeight, Styled, px};
+
+/// The base the ladder starts at; bezel's measured body is 13, coop keeps 15.
+pub const DEFAULT_BASE_TEXT_SIZE: f32 = 15.0;
+
+/// The body size every painted role is scaled against, as raw `f32` bits.
+static BASE: AtomicU32 = AtomicU32::new(DEFAULT_BASE_TEXT_SIZE.to_bits());
+
+/// Point the ladder at a body size in points; the caller refreshes windows.
+pub fn set_base_text_size(points: f32) {
+    BASE.store(points.max(1.0).to_bits(), Ordering::Relaxed);
+}
+
+/// The body size in points every painted role is scaled against.
+pub fn base_text_size() -> f32 {
+    f32::from_bits(BASE.load(Ordering::Relaxed))
+}
+
+/// A role in the type ladder — SwiftUI's `Font.TextStyle`.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum TextStyle {
+    LargeTitle,
+    Title,
+    Title2,
+    Title3,
+    Headline,
+    Subheadline,
+    Body,
+    Callout,
+    Footnote,
+    Caption,
+    Caption2,
+}
+
+impl TextStyle {
+    /// The role's measured size in points.
+    pub const fn size(self) -> f32 {
+        match self {
+            Self::LargeTitle => 26.0,
+            Self::Title => 22.0,
+            Self::Title2 => 17.0,
+            Self::Title3 => 15.0,
+            Self::Headline | Self::Body => 13.0,
+            Self::Callout => 12.0,
+            Self::Subheadline => 11.0,
+            Self::Footnote | Self::Caption | Self::Caption2 => 10.0,
+        }
+    }
+
+    pub fn painted(self) -> f32 {
+        self.size() * base_text_size() / Self::Body.size()
+    }
+
+    pub const fn line_height(self) -> f32 {
+        match self {
+            Self::LargeTitle => 32.0,
+            Self::Title => 26.0,
+            Self::Title2 => 22.0,
+            Self::Title3 => 20.0,
+            Self::Headline | Self::Body => 16.0,
+            Self::Callout => 15.0,
+            Self::Subheadline => 14.0,
+            Self::Footnote | Self::Caption | Self::Caption2 => 13.0,
+        }
+    }
+
+    pub fn painted_line_height(self) -> f32 {
+        self.line_height() * base_text_size() / Self::Body.size()
+    }
+
+    pub const fn weight(self) -> FontWeight {
+        match self {
+            Self::Headline => FontWeight::BOLD,
+            Self::Caption2 => FontWeight::MEDIUM,
+            _ => FontWeight::NORMAL,
+        }
+    }
+}
+
+/// One role as it is set: a rung on the ladder, its leading, weight and scale.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Metrics {
+    pub role: TextStyle,
+    pub leading: f32,
+    pub weight: FontWeight,
+    pub scale: f32,
+}
+
+impl Metrics {
+    pub const fn new(role: TextStyle, leading: f32, weight: FontWeight) -> Self {
+        Self {
+            role,
+            leading,
+            weight,
+            scale: 1.0,
+        }
+    }
+
+    pub const fn scaled(self, scale: f32) -> Self {
+        Self { scale, ..self }
+    }
+
+    pub fn size(self) -> f32 {
+        self.role.painted() * self.scale
+    }
+
+    pub fn line_height(self) -> f32 {
+        self.size() * self.leading
+    }
+}
+
+impl From<TextStyle> for Metrics {
+    /// The ladder's own setting for a role: its measured leading and weight.
+    fn from(role: TextStyle) -> Self {
+        Self::new(role, role.line_height() / role.size(), role.weight())
+    }
+}
+
+/// The ladder, on anything styled.
+pub trait Typeset: Styled + Sized {
+    /// Size, line height and weight together, from [`TextStyle`].
+    fn text_style(self, style: TextStyle) -> Self {
+        self.text_size(px(style.painted()))
+            .line_height(px(style.painted_line_height()))
+            .font_weight(style.weight())
+    }
+}
+
+impl<E: Styled> Typeset for E {}

crates/theme/tests/contrast.rs

@@ -1,125 +0,0 @@
-//! Palette contrast tests, mirroring bezel's `tests/theme.rs`: each light text
-//! token must land within ~0.5 of its dark counterpart's contrast ratio
-//! against its own background, and the primary text must keep the ratio the
-//! palette was tuned for.
-
-use gpui::Hsla;
-use theme::{Brand, ThemeColors, ThemeMode, Tint, contrast_ratio, flatten};
-
-// The shipped palette's measured floors (AppKit-style ink, per bezel):
-// text/bg is 14.4:1 dark and 15.1:1 light, muted lands near 6.3 dark and
-// 4.0 light, and faint sits below 3:1 in both appearances by design.
-const TEXT_RATIO: f32 = 13.9;
-const MUTED_RATIO: f32 = 3.9;
-const FAINT_RATIO: f32 = 1.8;
-const TEXT_PARITY: f32 = 0.7;
-
-fn ratio(fg: Hsla, bg: Hsla) -> f32 {
-    contrast_ratio(flatten(fg, bg), bg)
-}
-
-#[test]
-fn text_keeps_its_contrast() {
-    for appearance in [ThemeMode::Dark, ThemeMode::Light] {
-        let colors = ThemeColors::for_appearance(appearance);
-        assert!(
-            ratio(colors.text, colors.bg) >= TEXT_RATIO,
-            "{appearance:?}: text on bg = {}",
-            ratio(colors.text, colors.bg)
-        );
-        assert!(
-            ratio(colors.text, colors.surface) >= TEXT_RATIO,
-            "{appearance:?}: text on surface"
-        );
-        assert!(
-            ratio(colors.text_muted, colors.bg) >= MUTED_RATIO,
-            "{appearance:?}: muted on bg = {}",
-            ratio(colors.text_muted, colors.bg)
-        );
-        assert!(
-            ratio(colors.text_faint, colors.bg) >= FAINT_RATIO,
-            "{appearance:?}: faint on bg = {}",
-            ratio(colors.text_faint, colors.bg)
-        );
-    }
-}
-
-#[test]
-fn light_matches_dark_contrast() {
-    let dark = ThemeColors::for_appearance(ThemeMode::Dark);
-    let light = ThemeColors::for_appearance(ThemeMode::Light);
-
-    // Primary text keeps near-parity across appearances. Muted and faint do
-    // not (the light values sit further from the background by design, see
-    // Ink::APPKIT); their floors are asserted in `text_keeps_its_contrast`.
-    let pairs = [
-        ("text/bg", dark.text, dark.bg, light.text, light.bg),
-        (
-            "text/surface",
-            dark.text,
-            dark.surface,
-            light.text,
-            light.surface,
-        ),
-    ];
-    for (name, dark_fg, dark_bg, light_fg, light_bg) in pairs {
-        let dark_ratio = ratio(dark_fg, dark_bg);
-        let light_ratio = ratio(light_fg, light_bg);
-        let delta = (dark_ratio - light_ratio).abs();
-        assert!(
-            delta <= TEXT_PARITY,
-            "{name}: light deviates by {delta} (dark {dark_ratio:.3}, light {light_ratio:.3})"
-        );
-    }
-}
-
-#[test]
-fn default_brand_is_a_no_op() {
-    let brand = Brand::default();
-    assert!(brand.is_default());
-    for appearance in [ThemeMode::Dark, ThemeMode::Light] {
-        let base = ThemeColors::for_appearance(appearance);
-        let branded = brand.branded(appearance);
-        assert_eq!(
-            base, branded,
-            "{appearance:?}: default brand must not move the palette"
-        );
-    }
-}
-
-#[test]
-fn brand_tint_rotates_greys_and_keeps_semantics() {
-    let brand = Brand {
-        tint: Tint::new(257.417, 0.046),
-        accent: Tint::new(276.935, 0.182),
-        ..Brand::default()
-    };
-    let base = ThemeColors::for_appearance(ThemeMode::Dark);
-    let branded = brand.branded(ThemeMode::Dark);
-
-    assert_ne!(branded.bg, base.bg, "bg takes the tint");
-    assert_ne!(branded.accent, base.accent, "accent takes the accent hue");
-    assert_eq!(
-        branded.danger, base.danger,
-        "danger is semantic and keeps its hue"
-    );
-    assert_eq!(
-        branded.warning, base.warning,
-        "warning is semantic and keeps its hue"
-    );
-}
-
-#[test]
-fn warning_wash_carries_its_label() {
-    // warning_muted is a translucent amber wash, so the label pairing is
-    // measured against the plate flattened onto the content plane.
-    for appearance in [ThemeMode::Dark, ThemeMode::Light] {
-        let colors = ThemeColors::for_appearance(appearance);
-        let plate = flatten(colors.warning_muted, colors.bg);
-        assert!(
-            ratio(colors.warning, plate) >= 3.0,
-            "{appearance:?}: warning on warning_muted = {}",
-            ratio(colors.warning, plate)
-        );
-    }
-}

crates/ui/src/animation.rs

@@ -1,14 +0,0 @@
-/// A cubic bezier easing function like CSS `cubic-bezier` (see https://cubic-bezier.com).
-pub fn cubic_bezier(x1: f32, y1: f32, x2: f32, y2: f32) -> impl Fn(f32) -> f32 {
-    move |t: f32| {
-        let one_t = 1.0 - t;
-        let one_t2 = one_t * one_t;
-        let t2 = t * t;
-        let t3 = t2 * t;
-
-        // The Bezier curve function for x and y, where x0 = 0, y0 = 0, x3 = 1, y3 = 1
-        let _x = 3.0 * x1 * one_t2 * t + 3.0 * x2 * one_t * t2 + t3;
-
-        3.0 * y1 * one_t2 * t + 3.0 * y2 * one_t * t2 + t3
-    }
-}

crates/ui/src/button.rs

@@ -7,7 +7,10 @@ use gpui::{
     Styled, Window, div, px, relative,
 };
 use gpui_base::Button as BaseButton;
-use theme::{ActiveTheme, bubble_radius, button_radius, plate_active, plate_hover, wash};
+use theme::{
+    ActiveTheme, TextStyle, Typeset as _, bubble_radius, button_radius, plate_active, plate_hover,
+    wash,
+};
 
 use crate::indicator::Indicator;
 use crate::tooltip::Tooltip;
@@ -362,9 +365,9 @@ impl RenderOnce for Button {
                     .id("label")
                     .justify_center()
                     .map(|this| match self.size {
-                        Size::XSmall => this.text_xs().gap_1(),
-                        Size::Small => this.text_sm().gap_1p5(),
-                        _ => this.text_sm().gap_2(),
+                        Size::XSmall => this.text_style(TextStyle::Caption).gap_1(),
+                        Size::Small => this.text_style(TextStyle::Callout).gap_1p5(),
+                        _ => this.text_style(TextStyle::Callout).gap(px(theme::SPACE)),
                     })
                     .when(!self.loading, |this| {
                         this.when_some(self.icon, |this, icon| {

crates/ui/src/dialog.rs

@@ -2,16 +2,14 @@ use std::rc::Rc;
 
 use gpui::prelude::FluentBuilder;
 use gpui::{
-    Animation, AnimationExt as _, AnyElement, App, ClickEvent, Div, FocusHandle, IntoElement,
-    ParentElement, Pixels, RenderOnce, SharedString, StyleRefinement, Styled, Window, div, px,
-    transparent_black,
+    AnimationExt as _, AnyElement, App, ClickEvent, Div, FocusHandle, IntoElement, ParentElement,
+    Pixels, RenderOnce, SharedString, StyleRefinement, Styled, Window, div, px, transparent_black,
 };
 use gpui_base::{DialogBackdrop, DialogPopup, DialogTitle};
-use instant::Duration;
 use theme::{ActiveTheme, SCRIM_ALPHA_DARK, hairline, scrim, surface_radius, surface_shadows};
 
-use crate::animation::cubic_bezier;
 use crate::button::{Button, ButtonCustomVariant, ButtonVariant, ButtonVariants as _};
+use crate::motion::DIALOG_IN;
 use crate::scroll::ScrollableElement;
 use crate::{IconName, Root, StyledExt, WindowExtension, h_flex, v_flex};
 
@@ -272,18 +270,17 @@ impl RenderOnce for Dialog {
             padding_right = pr.to_pixels(self.width.into(), window.rem_size());
         }
 
-        let animation = Animation::new(Duration::from_secs_f64(0.25))
-            .with_easing(cubic_bezier(0.32, 0.72, 0., 1.));
-
         let backdrop = DialogBackdrop::new()
             .absolute()
             .inset_0()
             .when(self.overlay_visible, |this| {
                 this.bg(scrim(SCRIM_ALPHA_DARK))
             })
-            .with_animation("fade-in", animation.clone(), move |this, delta| {
-                this.opacity(delta)
-            });
+            .with_animation(
+                "fade-in",
+                DIALOG_IN.animation(),
+                move |this, delta| this.opacity(delta),
+            );
 
         let card = DialogPopup::new()
             .flex()
@@ -373,16 +370,18 @@ impl RenderOnce for Dialog {
                         .children(footer(render_ok, render_cancel, window, cx)),
                 )
             })
-            .with_animation("slide-down", animation, move |this, delta| {
-                // Settle at the target offset; only the entrance is animated.
-                let y_offset = px(30.) * (delta - 1.);
-                let mut shadow = surface_shadows();
-                // The shadows fade in with the slide.
-                for shadow in &mut shadow {
-                    shadow.color.a *= delta;
-                }
-                this.top(y_offset).shadow(shadow)
-            });
+            .with_animation(
+                "slide-down",
+                DIALOG_IN.animation(),
+                move |this, delta| {
+                    let y_offset = px(2.) * (delta - 1.);
+                    let mut shadow = surface_shadows();
+                    for shadow in &mut shadow {
+                        shadow.color.a *= delta;
+                    }
+                    this.top(y_offset).shadow(shadow)
+                },
+            );
 
         gpui_base::Dialog::new(cx)
             .layer(layer_ix, is_topmost)

crates/ui/src/dock/mod.rs

@@ -17,7 +17,7 @@ use gpui_base::dock::{
     PaneRef, PanelId, TabGroupContext, TabGroupRenderer,
 };
 use gpui_base::{HandleEdge, Placement, ResizeHandleContext};
-use theme::{ActiveTheme, TABBAR_HEIGHT, button_radius, panel_radius};
+use theme::{ActiveTheme, TABBAR_HEIGHT, TextStyle, Typeset as _, button_radius, panel_radius};
 
 use crate::button::{Button, ButtonVariants as _};
 use crate::resizable::{resize_handle, resize_handle_appearance};
@@ -349,7 +349,7 @@ impl Render for DragPreview {
             .overflow_hidden()
             .whitespace_nowrap()
             .rounded(px(button_radius()))
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .text_color(cx.theme().text)
             .text_ellipsis()
             .when(cx.theme().shadow, |this| this.shadow_xs())

crates/ui/src/group_box.rs

@@ -1,10 +1,10 @@
 use gpui::prelude::FluentBuilder;
 use gpui::{
     AnyElement, App, ElementId, InteractiveElement as _, IntoElement, ParentElement, RenderOnce,
-    StyleRefinement, Styled, Window, div, px, relative,
+    StyleRefinement, Styled, Window, div, px,
 };
 use smallvec::SmallVec;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::{StyledExt as _, v_flex};
 
@@ -108,8 +108,7 @@ impl RenderOnce for GroupBox {
                 this.child(
                     div()
                         .text_color(cx.theme().text_muted)
-                        .line_height(relative(1.))
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .font_semibold()
                         .child(title),
                 )

crates/ui/src/indicator.rs

@@ -1,10 +1,11 @@
 use gpui::prelude::FluentBuilder as _;
 use gpui::{
-    Animation, AnimationExt as _, App, Hsla, IntoElement, ParentElement, RenderOnce, Styled as _,
-    Transformation, Window, div, ease_in_out, percentage,
+    App, Hsla, IntoElement, ParentElement, RenderOnce, Styled as _, Transformation, Window, div,
+    percentage,
 };
 use instant::Duration;
 
+use crate::motion::{EASE_IN_OUT, MotionSpec, Painter, pulse_delta};
 use crate::{Icon, IconName, Sizable, Size};
 
 #[derive(IntoElement)]
@@ -45,16 +46,14 @@ impl Sizable for Indicator {
 }
 
 impl RenderOnce for Indicator {
-    fn render(self, _window: &mut Window, _cx: &mut App) -> impl IntoElement {
+    fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
+        let spec = MotionSpec::new(self.speed.as_millis().max(1) as u64, EASE_IN_OUT);
+        let phase = pulse_delta(&spec, Painter::from(window.current_view()), cx);
         div().child(
             self.icon
                 .with_size(self.size)
                 .when_some(self.color, |this, color| this.text_color(color))
-                .with_animation(
-                    "circle",
-                    Animation::new(self.speed).repeat().with_easing(ease_in_out),
-                    |this, delta| this.transform(Transformation::rotate(percentage(delta))),
-                ),
+                .transform(Transformation::rotate(percentage(phase))),
         )
     }
 }

crates/ui/src/kbd.rs

@@ -1,8 +1,8 @@
 use gpui::{
     Action, AsKeystroke, IntoElement, KeyContext, Keystroke, ParentElement as _, RenderOnce,
-    StyleRefinement, Styled, Window, div, relative,
+    StyleRefinement, Styled, Window, div,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::StyledExt;
 
@@ -179,8 +179,7 @@ impl RenderOnce for Kbd {
             .min_w_5()
             .text_center()
             .rounded_sm()
-            .line_height(relative(1.))
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .whitespace_normal()
             .flex_shrink_0()
             .refine_style(&self.style)

crates/ui/src/lib.rs

@@ -23,9 +23,9 @@ pub mod switch;
 pub mod tab;
 pub mod tooltip;
 
-mod animation;
 mod icon;
 mod kbd;
+pub mod motion;
 mod popover;
 mod resizable;
 mod root;

crates/ui/src/markdown.rs

@@ -63,7 +63,7 @@ impl RenderedText {
     /// Render the message as a GPUI Kit text view.
     pub fn element(&self, id: ElementId, _window: &Window, cx: &App) -> AnyElement {
         let theme = cx.theme();
-        let code_block = StyleRefinement::default().font_family(code_font_family());
+        let code_block = StyleRefinement::default().font_family(theme.font_mono.clone());
         let muted_heading = theme.text_muted;
 
         TextView::markdown(id, self.text.clone())
@@ -115,13 +115,3 @@ fn is_web_url(url: &str) -> bool {
     let url = url.to_ascii_lowercase();
     url.starts_with("http://") || url.starts_with("https://")
 }
-
-fn code_font_family() -> &'static str {
-    if cfg!(target_os = "macos") {
-        "Menlo"
-    } else if cfg!(target_os = "windows") {
-        "Consolas"
-    } else {
-        "monospace"
-    }
-}

crates/ui/src/menu/menu_item.rs

@@ -5,7 +5,7 @@ use gpui::{
     Styled, Window,
 };
 use smallvec::SmallVec;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::{Disableable, StyledExt, h_flex};
 
@@ -90,7 +90,7 @@ impl RenderOnce for MenuItemElement {
             .group(&self.group_name)
             .gap_x_1()
             .p_1()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .text_color(cx.theme().text)
             .relative()
             .items_center()

crates/ui/src/menu/popup_menu.rs

@@ -8,7 +8,7 @@ use gpui::{
     anchored, div, px, rems,
 };
 use gpui_base::actions::{Cancel, Confirm, SelectDown, SelectLeft, SelectRight, SelectUp};
-use theme::{ActiveTheme, Side};
+use theme::{ActiveTheme, Side, TextStyle, Typeset as _};
 
 use crate::kbd::Kbd;
 use crate::menu::menu_item::MenuItemElement;
@@ -633,7 +633,7 @@ impl PopupMenu {
 
         let this = MenuItemElement::new(ix, &group_name)
             .relative()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .py_0()
             .px(INNER_PADDING)
             .rounded(options.radius)
@@ -663,7 +663,7 @@ impl PopupMenu {
                 h_flex().cursor_default().items_center().gap_x_1().child(
                     div()
                         .flex_1()
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .font_semibold()
                         .text_color(cx.theme().text_muted)
                         .child(label.clone()),
@@ -686,7 +686,7 @@ impl PopupMenu {
                 })
                 .disabled(*disabled)
                 .h(item_height)
-                .gap_x_2()
+                .gap_x(px(theme::SPACE))
                 .children(Self::render_icon(
                     has_left_icon,
                     is_checked,
@@ -718,7 +718,7 @@ impl PopupMenu {
                         .min_h(item_height)
                         .size_full()
                         .items_center()
-                        .gap_x_2()
+                        .gap_x(px(theme::SPACE))
                         .children(Self::render_icon(
                             has_left_icon,
                             false,
@@ -729,7 +729,7 @@ impl PopupMenu {
                         .child(
                             h_flex()
                                 .flex_1()
-                                .gap_2()
+                                .gap(px(theme::SPACE))
                                 .items_center()
                                 .justify_between()
                                 .child(label.clone())

crates/ui/src/message.rs

@@ -5,7 +5,7 @@ use gpui::{
     div, px,
 };
 use smallvec::SmallVec;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::{InteractiveElementExt as _, StyledExt as _, h_flex, v_flex};
 
@@ -190,8 +190,8 @@ impl RenderOnce for MessageRow {
                             .when(show_author, |this| {
                                 this.child(
                                     h_flex()
-                                        .gap_2()
-                                        .text_sm()
+                                        .gap(px(theme::SPACE))
+                                        .text_style(TextStyle::Callout)
                                         .text_color(cx.theme().text_dim)
                                         .when_some(author, |this, author| {
                                             this.child(div().font_semibold().child(author))
@@ -280,7 +280,7 @@ impl RenderOnce for WelcomeMessage {
         v_flex()
             .id(id)
             .w_full()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .p_3()
             .items_center()
             .justify_center()
@@ -295,8 +295,7 @@ impl RenderOnce for WelcomeMessage {
                     .when_some(title, |this, title| {
                         this.child(
                             div()
-                                .text_sm()
-                                .font_semibold()
+                                .text_style(TextStyle::Headline)
                                 .text_color(cx.theme().text)
                                 .child(title),
                         )
@@ -304,7 +303,7 @@ impl RenderOnce for WelcomeMessage {
                     .when_some(message, |this, message| {
                         this.child(
                             div()
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().text_faint)
                                 .child(message),
                         )

crates/ui/src/motion.rs

@@ -0,0 +1,668 @@
+//! The motion kit, ported from bezel (`crates/motion/src/lib.rs` and its
+//! `app.rs`, MIT License, Copyright (c) 2026 bezel contributors). TranslateY
+//! rides a relative `top` inset, which taffy applies after layout, so
+//! siblings never move.
+
+use std::cell::RefCell;
+use std::collections::HashMap;
+use std::sync::atomic::{AtomicU32, Ordering};
+use std::time::Duration;
+
+use gpui::{
+    Animation, AnimationElement, AnimationExt as _, App, Context, ElementId, EntityId, Global,
+    Hsla, IntoElement, Rgba, SharedString, Styled, Window, px,
+};
+use instant::Instant;
+
+/// Redraw rate for anything driven by [`pulse_delta`].
+const PULSE_FPS: f32 = 30.0;
+
+/// How long a view stays on the tick list after its last pulse paint.
+const PULSE_LEASE: Duration = Duration::from_millis(300);
+
+/// Redraw rate for hover fades; [`HOVER_FADE`] paints in nine steps at it.
+const HOVER_FPS: f32 = 60.0;
+
+/// Floor on how long the clock sleeps between wake-ups.
+const MIN_SLEEP: Duration = Duration::from_millis(1);
+
+/// One view's claim on the clock.
+struct Lease {
+    /// The fastest rate anything on this view has claimed.
+    period: Duration,
+    /// When this view is next owed a redraw.
+    due: Instant,
+    /// A notify is out and the render it provoked has not renewed yet.
+    in_flight: bool,
+    /// When the claim lapses if nothing renews it.
+    until: Instant,
+}
+
+#[derive(Default)]
+struct PulseClock {
+    epoch: Option<Instant>,
+    leases: HashMap<EntityId, Lease>,
+    running: bool,
+}
+
+impl Global for PulseClock {}
+
+impl PulseClock {
+    fn next_wake(&self) -> Option<Instant> {
+        self.leases
+            .values()
+            .map(|lease| lease.due.min(lease.until))
+            .min()
+    }
+}
+
+/// A component's line back to the view that paints it.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct Painter(EntityId);
+
+impl Painter {
+    /// The view this render belongs to; take it once where the state is built.
+    pub fn of<T: 'static>(cx: &Context<T>) -> Self {
+        Self(cx.entity_id())
+    }
+
+    /// Redraw this view once.
+    pub fn notify(self, cx: &mut App) {
+        cx.notify(self.0);
+    }
+
+    /// Claim `fps` redraws a second; renew from `render` so an unmounted
+    /// element drops off.
+    pub fn lease(self, fps: f32, until: Duration, cx: &mut App) {
+        lease(self.0, fps, until, cx);
+    }
+
+    /// Whether the clock is what asked for the render running now.
+    pub fn woken(self, cx: &App) -> bool {
+        cx.try_global::<PulseClock>()
+            .and_then(|clock| clock.leases.get(&self.0))
+            .is_some_and(|lease| lease.in_flight)
+    }
+}
+
+impl From<EntityId> for Painter {
+    fn from(entity_id: EntityId) -> Self {
+        Self(entity_id)
+    }
+}
+
+impl From<Painter> for EntityId {
+    fn from(painter: Painter) -> Self {
+        painter.0
+    }
+}
+
+fn lease(view: EntityId, fps: f32, until: Duration, cx: &mut App) {
+    if cx.pause_when_inactive() && cx.active_window().is_none() {
+        return;
+    }
+    let now = cx.background_executor().now();
+    let period = Duration::from_secs_f32(1.0 / fps.clamp(1.0, 240.0));
+    let clock = cx.default_global::<PulseClock>();
+    clock
+        .leases
+        .entry(view)
+        .and_modify(|lease| {
+            lease.period = lease.period.min(period);
+            lease.due = lease.due.min(now + period);
+            lease.in_flight = false;
+            lease.until = lease.until.max(now + until);
+        })
+        .or_insert(Lease {
+            period,
+            due: now + period,
+            in_flight: false,
+            until: now + until,
+        });
+    if clock.running {
+        return;
+    }
+    clock.running = true;
+    cx.spawn(async move |cx| {
+        loop {
+            let sleep = cx.update(|cx| {
+                let now = cx.background_executor().now();
+                let clock = cx.default_global::<PulseClock>();
+                clock
+                    .next_wake()
+                    .map(|wake| wake.saturating_duration_since(now).max(MIN_SLEEP))
+            });
+            let Some(sleep) = sleep else { break };
+            cx.background_executor().timer(sleep).await;
+            let parked = cx.update(|cx| {
+                let now = cx.background_executor().now();
+                tick_hover_fades();
+                let clock = cx.default_global::<PulseClock>();
+                clock.leases.retain(|_, lease| lease.until > now);
+                if clock.leases.is_empty() {
+                    clock.running = false;
+                    return true;
+                }
+                let mut owed = Vec::new();
+                for (view, lease) in clock.leases.iter_mut() {
+                    if lease.due > now {
+                        continue;
+                    }
+                    lease.due += lease.period;
+                    if lease.due <= now {
+                        lease.due = now + lease.period;
+                    }
+                    lease.in_flight = true;
+                    owed.push(*view);
+                }
+                for view in owed {
+                    cx.notify(view);
+                }
+                false
+            });
+            if parked {
+                break;
+            }
+        }
+    })
+    .detach();
+}
+
+/// Current phase `[0,1)` of a repeating spec; reduced motion returns a
+/// static 0 and schedules nothing.
+pub fn pulse_delta(spec: &MotionSpec, painter: Painter, cx: &mut App) -> f32 {
+    if cx.reduced_motion() {
+        return 0.0;
+    }
+    painter.lease(PULSE_FPS, PULSE_LEASE, cx);
+    let now = cx.background_executor().now();
+    let clock = cx.default_global::<PulseClock>();
+    let epoch = *clock.epoch.get_or_insert(now);
+    let period = spec.total().as_secs_f32();
+    ((now - epoch).as_secs_f32() / period).fract()
+}
+
+/// A CSS `cubic-bezier(x1, y1, x2, y2)` timing function, evaluated exactly.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct CubicBezier {
+    pub x1: f32,
+    pub y1: f32,
+    pub x2: f32,
+    pub y2: f32,
+}
+
+impl CubicBezier {
+    pub const fn new(x1: f32, y1: f32, x2: f32, y2: f32) -> Self {
+        Self { x1, y1, x2, y2 }
+    }
+
+    fn coefficients(a: f32, b: f32) -> (f32, f32, f32) {
+        let c = 3.0 * a;
+        let bb = 3.0 * (b - a) - c;
+        let aa = 1.0 - c - bb;
+        (aa, bb, c)
+    }
+
+    fn sample_x(&self, t: f32) -> f32 {
+        let (a, b, c) = Self::coefficients(self.x1, self.x2);
+        ((a * t + b) * t + c) * t
+    }
+
+    fn sample_y(&self, t: f32) -> f32 {
+        let (a, b, c) = Self::coefficients(self.y1, self.y2);
+        ((a * t + b) * t + c) * t
+    }
+
+    fn sample_x_derivative(&self, t: f32) -> f32 {
+        let (a, b, c) = Self::coefficients(self.x1, self.x2);
+        (3.0 * a * t + 2.0 * b) * t + c
+    }
+
+    fn solve_t_for_x(&self, x: f32) -> f32 {
+        let mut t = x;
+        for _ in 0..8 {
+            let err = self.sample_x(t) - x;
+            if err.abs() < 1e-6 {
+                return t;
+            }
+            let d = self.sample_x_derivative(t);
+            if d.abs() < 1e-6 {
+                break;
+            }
+            t -= err / d;
+        }
+        let (mut lo, mut hi) = (0.0_f32, 1.0_f32);
+        for _ in 0..32 {
+            let mid = (lo + hi) / 2.0;
+            if self.sample_x(mid) < x {
+                lo = mid
+            } else {
+                hi = mid
+            }
+        }
+        (lo + hi) / 2.0
+    }
+
+    /// Eased output for input progress `x ∈ [0,1]`, clamped hard — gpui's
+    /// animation element asserts its delta is in `[0,1]` and aborts.
+    pub fn eval(&self, x: f32) -> f32 {
+        if x <= 0.0 {
+            return 0.0;
+        }
+        if x >= 1.0 {
+            return 1.0;
+        }
+        self.sample_y(self.solve_t_for_x(x)).clamp(0.0, 1.0)
+    }
+
+    /// This curve as a gpui easing closure.
+    pub fn easing(self) -> impl Fn(f32) -> f32 + 'static {
+        move |x| self.eval(x)
+    }
+}
+
+/// The signature entrance curve — CSS `cubic-bezier(0.16, 1, 0.3, 1)`.
+pub const EASE_OUT_EXPO: CubicBezier = CubicBezier::new(0.16, 1.0, 0.3, 1.0);
+/// CSS `ease-out` — width/height transitions.
+pub const EASE_OUT: CubicBezier = CubicBezier::new(0.0, 0.0, 0.58, 1.0);
+/// CSS `ease` — quick fades, menu/dialog pops.
+pub const EASE: CubicBezier = CubicBezier::new(0.25, 0.1, 0.25, 1.0);
+/// Sidebar resort glide — CSS `cubic-bezier(0.22, 1, 0.36, 1)`.
+pub const EASE_RESORT: CubicBezier = CubicBezier::new(0.22, 1.0, 0.36, 1.0);
+/// CSS `ease-in-out`.
+pub const EASE_IN_OUT: CubicBezier = CubicBezier::new(0.42, 0.0, 0.58, 1.0);
+/// Tailwind's default transition curve — CSS `cubic-bezier(0.4, 0, 0.2, 1)`.
+pub const EASE_TAILWIND: CubicBezier = CubicBezier::new(0.4, 0.0, 0.2, 1.0);
+
+/// One catalog entry: duration + optional delay + curve; gpui has no native
+/// delay, so `delay_ms` holds progress at 0 until it elapses.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct MotionSpec {
+    pub duration_ms: u64,
+    pub delay_ms: u64,
+    pub curve: CubicBezier,
+}
+
+impl MotionSpec {
+    pub const fn new(duration_ms: u64, curve: CubicBezier) -> Self {
+        Self {
+            duration_ms,
+            delay_ms: 0,
+            curve,
+        }
+    }
+
+    pub const fn with_delay(mut self, delay_ms: u64) -> Self {
+        self.delay_ms = delay_ms;
+        self
+    }
+
+    /// Wall-clock span of the whole timeline (delay + duration).
+    pub fn total(&self) -> Duration {
+        Duration::from_millis(self.delay_ms + self.duration_ms)
+    }
+
+    /// Eased progress (0..1) for a raw timeline delta (0..1 across `total`).
+    pub fn progress(&self, raw_delta: f32) -> f32 {
+        let total = (self.delay_ms + self.duration_ms) as f32;
+        if total <= 0.0 || self.duration_ms == 0 {
+            return 1.0;
+        }
+        let t =
+            (raw_delta.clamp(0.0, 1.0) * total - self.delay_ms as f32) / self.duration_ms as f32;
+        self.curve.eval(t.clamp(0.0, 1.0))
+    }
+
+    /// A oneshot gpui [`Animation`] for this spec.
+    pub fn animation(&self) -> Animation {
+        let spec = *self;
+        Animation::new(spec.total().mul_f32(speed_scale())).with_easing(move |d| spec.progress(d))
+    }
+}
+
+/// Entrances: 0.5s expo-out fade + 4px rise.
+pub const FADE_IN: MotionSpec = MotionSpec::new(500, EASE_OUT_EXPO);
+/// Quick fade: 0.15s.
+pub const FADE_QUICK: MotionSpec = MotionSpec::new(150, EASE);
+/// Popover-in: 0.14s.
+pub const MENU_IN: MotionSpec = MotionSpec::new(140, EASE);
+/// Popover-out: 0.1s — quicker than the entrance.
+pub const MENU_OUT: MotionSpec = MotionSpec::new(100, EASE);
+/// Dialog-in: 0.18s.
+pub const DIALOG_IN: MotionSpec = MotionSpec::new(180, EASE);
+/// Boot-splash exit: 0.5s fade + 6px lift after a 0.15s hold.
+pub const SPLASH_OUT: MotionSpec = MotionSpec::new(500, EASE).with_delay(150);
+/// Sidebar / pane width+height transitions: 200ms ease-out.
+pub const RESIZE: MotionSpec = MotionSpec::new(200, EASE_OUT);
+/// Tab drag-reorder sliding transforms: 150ms.
+pub const TAB_SLIDE: MotionSpec = MotionSpec::new(150, EASE_OUT);
+/// Per-pane collapse: 180ms height.
+pub const COLLAPSE: MotionSpec = MotionSpec::new(180, EASE_OUT);
+/// A gliding move the reader caused rather than one they are dragging.
+pub const LAYOUT: MotionSpec = MotionSpec::new(200, EASE_OUT);
+/// Chevron rotate: 200ms.
+pub const CHEVRON: MotionSpec = MotionSpec::new(200, EASE);
+/// Scroll-to-row glide: 500ms ease-in-out.
+pub const SCROLL_GLIDE: MotionSpec = MotionSpec::new(500, EASE_IN_OUT);
+/// CSS `transition-colors` default: 150ms over [`EASE_TAILWIND`].
+pub const HOVER_FADE: MotionSpec = MotionSpec::new(150, EASE_TAILWIND);
+/// Toast slide/fade, coop's own: 250ms over [`EASE_TAILWIND`].
+pub const NOTIFICATION_IN: MotionSpec = MotionSpec::new(250, EASE_TAILWIND);
+/// Pulse loader period: 2.4s.
+pub const PULSE: MotionSpec = MotionSpec::new(2400, EASE);
+/// Spinner wave period: 750ms.
+pub const GRADIENT_SPIN: MotionSpec = MotionSpec::new(750, EASE);
+
+/// Standard entrance: opacity 0→1 + translateY 4→0 over [`FADE_IN`].
+pub fn fade_in<E>(id: impl Into<ElementId>, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, FADE_IN.animation(), |el, t| {
+        el.relative().opacity(t).top(px(4.0 * (1.0 - t)))
+    })
+}
+
+/// Quick opacity-only fade over [`FADE_QUICK`].
+pub fn fade_quick<E>(id: impl Into<ElementId>, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, FADE_QUICK.animation(), |el, t| el.opacity(t))
+}
+
+/// Popover entrance: fade + translateY −2→0 over [`MENU_IN`].
+pub fn menu_in<E>(id: impl Into<ElementId>, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, MENU_IN.animation(), |el, t| {
+        el.relative()
+            .opacity(0.3 + 0.7 * t)
+            .top(px(-2.0 * (1.0 - t)))
+    })
+}
+
+/// Popover exit over [`MENU_OUT`]; the caller supplies progress because
+/// `with_animation` replays from 0 on remount.
+pub fn menu_out<E>(id: impl Into<ElementId>, t: f32, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, MENU_OUT.animation(), move |el, _| {
+        el.relative().opacity(1.0 - t).top(px(-2.0 * t))
+    })
+}
+
+/// Dialog entrance over [`DIALOG_IN`] (fade + 2px rise).
+pub fn dialog_in<E>(id: impl Into<ElementId>, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, DIALOG_IN.animation(), |el, t| {
+        el.relative().opacity(t).top(px(2.0 * (1.0 - t)))
+    })
+}
+
+/// Boot-splash exit: hold 150ms, then fade out + lift 6px over 500ms.
+pub fn splash_out<E>(id: impl Into<ElementId>, element: E) -> AnimationElement<E>
+where
+    E: Styled + IntoElement + 'static,
+{
+    element.with_animation(id, SPLASH_OUT.animation(), |el, t| {
+        el.opacity(1.0 - t).top(px(-6.0 * t))
+    })
+}
+
+/// Linear interpolation.
+pub fn lerp(from: f32, to: f32, t: f32) -> f32 {
+    from + (to - from) * t
+}
+
+/// One element's hover fade progress over [`HOVER_FADE`].
+#[derive(Debug, Clone, Copy)]
+pub struct FadeEntry {
+    origin: f32,
+    target: f32,
+    started: Instant,
+    seen: u64,
+}
+
+impl FadeEntry {
+    fn value(&self, now: Instant, duration: Duration) -> f32 {
+        let elapsed = now.saturating_duration_since(self.started);
+        if duration.is_zero() || elapsed >= duration {
+            return self.target;
+        }
+        let raw = elapsed.as_secs_f32() / duration.as_secs_f32();
+        lerp(self.origin, self.target, HOVER_FADE.curve.eval(raw))
+    }
+
+    fn settled(&self, now: Instant, duration: Duration) -> bool {
+        self.origin == self.target || now.saturating_duration_since(self.started) >= duration
+    }
+}
+
+/// Which fade: the view that paints it plus the element key — two views
+/// using the same string would trade washes.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Fade {
+    pub painter: Painter,
+    pub key: SharedString,
+}
+
+impl Fade {
+    pub fn new(painter: Painter, key: impl Into<SharedString>) -> Self {
+        Self {
+            painter,
+            key: key.into(),
+        }
+    }
+}
+
+/// Per-fade progress store.
+#[derive(Default)]
+pub struct HoverFades {
+    pub entries: HashMap<Fade, FadeEntry>,
+    frame: u64,
+}
+
+impl HoverFades {
+    pub fn duration() -> Duration {
+        HOVER_FADE.total().mul_f32(speed_scale())
+    }
+
+    /// Pointer entered (`hovered`) or left the element behind `fade`.
+    pub fn set_at(&mut self, fade: &Fade, hovered: bool, reduced: bool, now: Instant) {
+        let target = if hovered { 1.0 } else { 0.0 };
+        let duration = Self::duration();
+        let current = self
+            .entries
+            .get(fade)
+            .map(|e| e.value(now, duration))
+            .unwrap_or(0.0);
+        if target == 0.0 && !self.entries.contains_key(fade) {
+            return;
+        }
+        let origin = if reduced { target } else { current };
+        let seen = self.frame;
+        self.entries.insert(
+            fade.clone(),
+            FadeEntry {
+                origin,
+                target,
+                started: now,
+                seen,
+            },
+        );
+    }
+
+    /// Hover progress (0..1) for `fade` at `now`; stamps liveness.
+    pub fn value_at(&mut self, fade: &Fade, now: Instant) -> f32 {
+        let frame = self.frame;
+        match self.entries.get_mut(fade) {
+            Some(entry) => {
+                entry.seen = frame;
+                entry.value(now, Self::duration())
+            }
+            None => 0.0,
+        }
+    }
+
+    /// Advance the frame counter and prune settled or unmounted entries.
+    pub fn tick_at(&mut self, now: Instant) -> bool {
+        self.frame += 1;
+        let frame = self.frame;
+        let duration = Self::duration();
+        let mut active = false;
+        self.entries.retain(|_, entry| {
+            if entry.seen + 1 < frame {
+                return false;
+            }
+            let settled = entry.settled(now, duration);
+            if !settled {
+                active = true;
+            }
+            !(settled && entry.target == 0.0)
+        });
+        active
+    }
+}
+
+thread_local! {
+    static HOVER_FADES: RefCell<HoverFades> = RefCell::new(HoverFades::default());
+}
+
+/// Hover progress (0..1) for `fade` this frame.
+pub fn hover_t(fade: &Fade) -> f32 {
+    HOVER_FADES.with(|fades| fades.borrow_mut().value_at(fade, Instant::now()))
+}
+
+/// Record a hover flip for `fade`; prefer [`hover_listener`].
+pub fn set_hover(fade: &Fade, hovered: bool, reduced: bool) {
+    HOVER_FADES.with(|fades| {
+        fades
+            .borrow_mut()
+            .set_at(fade, hovered, reduced, Instant::now())
+    });
+}
+
+/// An `.on_hover` listener driving the fade.
+pub fn hover_listener(fade: Fade) -> impl Fn(&bool, &mut Window, &mut App) + 'static {
+    move |hovered, _window, cx| {
+        set_hover(&fade, *hovered, cx.reduced_motion());
+        fade.painter.lease(HOVER_FPS, HoverFades::duration(), cx);
+    }
+}
+
+/// Once-per-tick bookkeeping for the fade store, driven by the clock.
+fn tick_hover_fades() {
+    HOVER_FADES.with(|fades| {
+        fades.borrow_mut().tick_at(Instant::now());
+    });
+}
+
+/// Blend two colors by `t` the way the browser transitions them: sRGB with
+/// premultiplied alpha, so a wash fading in never passes through grey.
+pub fn mix(from: Hsla, to: Hsla, t: f32) -> Hsla {
+    let t = t.clamp(0.0, 1.0);
+    if t <= 0.0 {
+        return from;
+    }
+    if t >= 1.0 {
+        return to;
+    }
+    let (f, g) = (Rgba::from(from), Rgba::from(to));
+    let a = lerp(f.a, g.a, t);
+    if a <= f32::EPSILON {
+        return Hsla::from(Rgba { a: 0.0, ..g });
+    }
+    Hsla::from(Rgba {
+        r: lerp(f.r * f.a, g.r * g.a, t) / a,
+        g: lerp(f.g * f.a, g.g * g.a, t) / a,
+        b: lerp(f.b * f.a, g.b * g.a, t) / a,
+        a,
+    })
+}
+
+/// The standard hover blend: rest → hover color at this fade's progress.
+pub fn hover_blend(fade: &Fade, rest: Hsla, hover: Hsla) -> Hsla {
+    mix(rest, hover, hover_t(fade))
+}
+
+/// Process-wide motion speed, as raw `f32` bits; an atomic mirror because the
+/// timelines are read from free functions with no `cx` in scope.
+static SPEED: AtomicU32 = AtomicU32::new(1.0f32.to_bits());
+
+/// How far every timeline in the catalog is stretched. `1.0` is the designed
+/// speed.
+pub fn speed_scale() -> f32 {
+    f32::from_bits(SPEED.load(Ordering::Relaxed))
+}
+
+/// Stretch every catalog timeline by `scale`; clamped, and a non-finite
+/// `scale` resets to `1.0`.
+pub fn set_speed(scale: f32) {
+    let scale = if scale.is_finite() {
+        scale.clamp(0.01, 100.0)
+    } else {
+        1.0
+    };
+    SPEED.store(scale.to_bits(), Ordering::Relaxed);
+}
+
+/// Process-wide motion switches.
+#[derive(Clone, Copy)]
+struct MotionSettings {
+    reduced_motion: bool,
+    pause_when_inactive: bool,
+}
+
+impl Global for MotionSettings {}
+
+impl MotionSettings {
+    /// Defaults: the OS flag rules reduce motion; the clock pauses when no
+    /// window is active.
+    fn get(cx: &App) -> Self {
+        cx.try_global::<MotionSettings>().copied().unwrap_or(Self {
+            reduced_motion: false,
+            pause_when_inactive: true,
+        })
+    }
+}
+
+/// App-level motion switches.
+pub trait AppExt {
+    /// The OS reduce-motion flag ORed with the manual override.
+    fn reduced_motion(&self) -> bool;
+
+    /// Set the manual reduce-motion override.
+    fn set_reduced_motion(&mut self, reduced: bool);
+
+    /// Whether the leased clock claims frames while no window is active.
+    fn pause_when_inactive(&self) -> bool;
+
+    fn set_pause_when_inactive(&mut self, pause: bool);
+}
+
+impl AppExt for App {
+    fn reduced_motion(&self) -> bool {
+        self.reduce_motion() || MotionSettings::get(self).reduced_motion
+    }
+
+    fn set_reduced_motion(&mut self, reduced: bool) {
+        let mut settings = MotionSettings::get(self);
+        settings.reduced_motion = reduced;
+        self.set_global(settings);
+    }
+
+    fn pause_when_inactive(&self) -> bool {
+        MotionSettings::get(self).pause_when_inactive
+    }
+
+    fn set_pause_when_inactive(&mut self, pause: bool) {
+        let mut settings = MotionSettings::get(self);
+        settings.pause_when_inactive = pause;
+        self.set_global(settings);
+    }
+}

crates/ui/src/nav_item.rs

@@ -6,7 +6,7 @@ use gpui::{
     ParentElement, RenderOnce, SharedString, StatefulInteractiveElement as _, StyleRefinement,
     Styled, Window, div, px,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::{Selectable, StyledExt, h_flex};
 
@@ -98,7 +98,7 @@ impl RenderOnce for NavItem {
             .px_2()
             .py_1()
             .w_full()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .rounded(px(theme::button_radius()))
             .text_color(text_color)
             .child(self.icon)
@@ -107,7 +107,7 @@ impl RenderOnce for NavItem {
                     .flex_1()
                     .min_w_0()
                     .truncate()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(self.label),
             )
             .when_some(self.suffix, |this, suffix| {

crates/ui/src/notification.rs

@@ -5,19 +5,19 @@ use std::time::Duration;
 
 use gpui::prelude::FluentBuilder;
 use gpui::{
-    Anchor, Animation, AnimationExt, AnyElement, App, AppContext, ClickEvent, Context,
-    DismissEvent, ElementId, Entity, EventEmitter, InteractiveElement as _, IntoElement,
-    ParentElement as _, Render, SharedString, StatefulInteractiveElement, StyleRefinement, Styled,
-    Subscription, Window, div, px, relative,
+    Anchor, AnimationExt, AnyElement, App, AppContext, ClickEvent, Context, DismissEvent,
+    ElementId, Entity, EventEmitter, InteractiveElement as _, IntoElement, ParentElement as _,
+    Render, SharedString, StatefulInteractiveElement, StyleRefinement, Styled, Subscription,
+    Window, div, px, relative,
 };
 use gpui_base::{
     Toast as BaseToast, ToastManager, ToastMotion, ToastOptions, ToastStack, ToastStackState,
     ToastTransitionStatus,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
-use crate::animation::cubic_bezier;
 use crate::button::{Button, ButtonVariants as _};
+use crate::motion::NOTIFICATION_IN;
 use crate::{Icon, IconName, Sizable as _, Size, StyledExt, h_flex, v_flex};
 
 /// How often the notification lifecycle clock is sampled.
@@ -312,7 +312,7 @@ impl Render for Notification {
                 this.shadow(theme::surface_shadows())
             })
             .p_2()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .justify_start()
             .items_start()
             .when(only_message, |this| this.items_center())
@@ -326,12 +326,12 @@ impl Render for Notification {
                     .gap_1()
                     .overflow_hidden()
                     .when_some(self.title.clone(), |this, title| {
-                        this.child(h_flex().h_5().text_sm().font_semibold().child(title))
+                        this.child(h_flex().h_5().text_style(TextStyle::Headline).child(title))
                     })
                     .when_some(self.message.clone(), |this, message| {
                         this.child(
                             div()
-                                .text_sm()
+                                .text_style(TextStyle::Callout)
                                 .when(has_title, |this| this.text_color(cx.theme().text_muted))
                                 .line_height(relative(1.3))
                                 .child(message),
@@ -339,7 +339,7 @@ impl Render for Notification {
                     })
                     .when_some(content, |this, content| this.child(content))
                     .when_some(action, |this, action| {
-                        this.gap_2().child(
+                        this.gap(px(theme::SPACE)).child(
                             h_flex()
                                 .mt_2()
                                 .w_full()
@@ -379,8 +379,7 @@ impl Render for Notification {
             }))
             .with_animation(
                 ElementId::NamedInteger("slide-down".into(), closing as u64),
-                Animation::new(Duration::from_secs_f64(0.25))
-                    .with_easing(cubic_bezier(0.4, 0., 0.2, 1.)),
+                NOTIFICATION_IN.animation(),
                 move |this, delta| {
                     if closing {
                         let opacity = 1. - delta;

crates/ui/src/root.rs

@@ -11,7 +11,7 @@ use gpui::{
 use gpui_base::TextSelectionLayer;
 use theme::{
     ActiveTheme, CLIENT_SIDE_DECORATION_BORDER, CLIENT_SIDE_DECORATION_ROUNDING,
-    CLIENT_SIDE_DECORATION_SHADOW, surface_shadows,
+    CLIENT_SIDE_DECORATION_SHADOW, base_text_size, surface_shadows,
 };
 
 use crate::dialog::Dialog;
@@ -234,8 +234,8 @@ impl Root {
 
 impl Render for Root {
     fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let rem_size = cx.theme().font_size;
-        let font_family = cx.theme().font_family.clone();
+        let rem_size = px(base_text_size());
+        let font_family = cx.theme().font_sans.clone();
         let decorations = window.window_decorations();
 
         // Set the base font size

crates/ui/src/styled.rs

@@ -1,6 +1,6 @@
 use gpui::{App, Div, Pixels, Refineable, StyleRefinement, Styled, div, px};
 pub use gpui_base::component_traits::{Disableable, Selectable};
-use theme::{ActiveTheme, surface_radius, surface_shadows};
+use theme::{ActiveTheme, TextStyle, Typeset as _, surface_radius, surface_shadows};
 
 /// Returns a `Div` as horizontal flex layout.
 pub fn h_flex() -> Div {
@@ -135,10 +135,10 @@ impl<T: Styled> StyleSized<T> for T {
 
     fn input_h(self, size: Size) -> Self {
         match size {
-            Size::XSmall => self.h_6().text_xs(),
-            Size::Small => self.h_8().text_sm(),
-            Size::Medium => self.h_9().text_base(),
-            Size::Large => self.h_12().text_lg(),
+            Size::XSmall => self.h_6().text_style(TextStyle::Caption),
+            Size::Small => self.h_8().text_style(TextStyle::Callout),
+            Size::Medium => self.h_9().text_style(TextStyle::Body),
+            Size::Large => self.h_12().text_style(TextStyle::Title3),
             Size::Size(size) => self.h(px(24.)).text_size(size),
         }
     }

crates/ui/src/switch.rs

@@ -7,7 +7,7 @@ use gpui::{
     div, px, transparent_black,
 };
 use gpui_base::{Spring, Switch as BaseSwitch, SwitchThumb, SwitchTrack, spring};
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 type OnClick = Option<Rc<dyn Fn(&bool, &mut Window, &mut App)>>;
 
@@ -113,7 +113,12 @@ impl RenderOnce for Switch {
                         .items_center()
                         .gap_4()
                         .when_some(label, |this, label| {
-                            this.child(div().text_sm().text_color(cx.theme().text).child(label))
+                            this.child(
+                                div()
+                                    .text_style(TextStyle::Callout)
+                                    .text_color(cx.theme().text)
+                                    .child(label),
+                            )
                         })
                         .child(
                             SwitchTrack::new((self.id.clone(), "track"))
@@ -142,7 +147,7 @@ impl RenderOnce for Switch {
                     this.child(
                         div()
                             .pr_3()
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .text_color(cx.theme().text_muted)
                             .child(description),
                     )

crates/ui/src/tab/mod.rs

@@ -5,7 +5,7 @@ use gpui::{
     AnyElement, App, ClickEvent, Div, InteractiveElement, IntoElement, MouseButton, ParentElement,
     RenderOnce, SharedString, StatefulInteractiveElement, Styled, Window, div, px,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 
 use crate::{Selectable, h_flex};
 
@@ -170,7 +170,7 @@ impl RenderOnce for Tab {
             .items_center()
             .text_color(foreground)
             .when(segmented, |this| {
-                this.text_xs()
+                this.text_style(TextStyle::Caption)
                     .flex_1()
                     .h_6()
                     .rounded(px(theme::button_radius()))
@@ -188,7 +188,7 @@ impl RenderOnce for Tab {
                     .h_7()
                     .gap_1()
                     .px_1p5()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .rounded(px(theme::button_radius()))
                     .overflow_hidden()
                     .when(selected && !disabled, |this| {

crates/ui/src/tooltip.rs

@@ -1,10 +1,10 @@
 use gpui::prelude::FluentBuilder;
 use gpui::{
     App, AppContext, Context, Entity, IntoElement, ParentElement, Render, SharedString, Styled,
-    Window, px, relative,
+    Window, px,
 };
 use gpui_base::Tooltip as BaseTooltip;
-use theme::{ActiveTheme, control_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, control_radius};
 
 pub struct Tooltip {
     text: SharedString,
@@ -19,7 +19,7 @@ impl Tooltip {
 impl Render for Tooltip {
     fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         BaseTooltip::new("tooltip")
-            .font_family(".SystemUIFont")
+            .font_family(cx.theme().font_sans.clone())
             .m_3()
             .p_1p5()
             .border_1()
@@ -27,9 +27,8 @@ impl Render for Tooltip {
             .bg(cx.theme().surface_overlay)
             .when(cx.theme().shadow, |this| this.shadow_sm())
             .rounded(px(control_radius()))
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .text_color(cx.theme().text)
-            .line_height(relative(1.25))
             .child(self.text.clone())
     }
 }

crates/workspace/src/dialogs/import.rs

@@ -7,7 +7,7 @@ use gpui::{
 use instant::Duration;
 use nostr_connect::prelude::*;
 use state::{CoopAuthUrlHandler, NostrRegistry, USER_KEYRING};
-use theme::{ActiveTheme, surface_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, surface_radius};
 use ui::button::{Button, ButtonVariants};
 use ui::input::{Input, InputEvent, InputState};
 use ui::{Disableable, StyledExt, WindowExtension, v_flex};
@@ -223,8 +223,8 @@ impl Render for ImportIdentity {
 
         v_flex()
             .size_full()
-            .gap_2()
-            .text_sm()
+            .gap(px(theme::SPACE))
+            .text_style(TextStyle::Callout)
             .child(
                 v_flex()
                     .gap_1()
@@ -250,7 +250,7 @@ impl Render for ImportIdentity {
                                 .p_2()
                                 .rounded(px(surface_radius()))
                                 .bg(cx.theme().warning_muted)
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().warning)
                                 .line_height(relative(1.2))
                                 .child(div().child(BUNKER_WARN)),
@@ -262,7 +262,7 @@ impl Render for ImportIdentity {
                                 .p_2()
                                 .rounded(px(surface_radius()))
                                 .bg(cx.theme().warning_muted)
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().warning)
                                 .line_height(relative(1.2))
                                 .child(div().child(KEY_WARN)),
@@ -295,7 +295,7 @@ impl Render for ImportIdentity {
             .when_some(self.error.read(cx).as_ref(), |this, error| {
                 this.child(
                     div()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_center()
                         .text_color(cx.theme().danger)
                         .child(error.clone()),

crates/workspace/src/dialogs/join_group.rs

@@ -43,7 +43,7 @@ pub fn open(window: &mut Window, cx: &mut App) {
             .child(
                 v_flex()
                     .gap_3()
-                    .child(Input::new(&input).cleanable(true).text_sm())
+                    .child(Input::new(&input).cleanable(true))
                     .child(
                         h_flex()
                             .gap_1()

crates/workspace/src/dialogs/new_chat.rs

@@ -13,7 +13,7 @@ use nostr_sdk::prelude::*;
 use person::PersonRegistry;
 use settings::AppSettings;
 use state::NostrRegistry;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{DockArea, DockPlacement, PanelHandle};
@@ -332,7 +332,7 @@ impl NewChat {
 
                 Nav::new(start + offset)
                     .label(profile.name())
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .when(!AppSettings::get_hide_avatar(cx), |this| {
                         this.prefix(
                             Avatar::from_source(profile.avatar())
@@ -366,7 +366,7 @@ impl NewChat {
                     .p_0p5()
                     .rounded_full()
                     .bg(cx.theme().surface_raised)
-                    .text_size(px(10.))
+                    .text_style(TextStyle::Caption2)
                     .hover(|this| this.bg(cx.theme().element_hover))
                     .child(
                         Avatar::from_source(profile.avatar())
@@ -394,7 +394,7 @@ impl Render for NewChat {
                 h_flex()
                     .gap_1()
                     .w_full()
-                    .child(Input::new(&self.input).flex_1().text_sm().cleanable(true))
+                    .child(Input::new(&self.input).flex_1().cleanable(true))
                     .child(
                         Button::new("add")
                             .icon(IconName::Plus)
@@ -412,11 +412,11 @@ impl Render for NewChat {
             })
             .map(|this| {
                 if let Some(error) = self.error.clone() {
-                    this.child(div().text_xs().text_color(cx.theme().danger).child(error))
+                    this.child(div().text_style(TextStyle::Caption).text_color(cx.theme().danger).child(error))
                 } else {
                     this.child(
                         div()
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .text_color(cx.theme().text_faint)
                             .child(notice),
                     )

crates/workspace/src/dialogs/new_group.rs

@@ -3,7 +3,7 @@ use std::rc::Rc;
 use gpui::{App, AppContext, ClickEvent, Div, Entity, ParentElement, Styled, Window, px};
 use nip29::{GroupId, GroupKey, GroupMetadata, GroupsRegistry};
 use nostr_sdk::prelude::*;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::input::{Input, InputState};
 use ui::notification::Notification;
@@ -67,7 +67,7 @@ pub fn open(window: &mut Window, cx: &mut App) {
 fn field(label: &'static str, input: &Entity<InputState>, cx: &App) -> Div {
     v_flex()
         .gap_1()
-        .text_sm()
+        .text_style(TextStyle::Callout)
         .text_color(cx.theme().text_muted)
         .child(label)
         .child(Input::new(input))

crates/workspace/src/dialogs/profile.rs

@@ -12,7 +12,7 @@ use nostr_sdk::prelude::*;
 use person::{Person, PersonRegistry, shorten_pubkey};
 use settings::AppSettings;
 use state::{NostrRegistry, upload};
-use theme::{ActiveTheme, button_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::DockPlacement;
@@ -393,7 +393,7 @@ impl Render for ProfileDialog {
                         .gap_3()
                         .rounded(px(button_radius()))
                         .bg(cx.theme().surface)
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .child(shorten_pkey)
                         .child(
                             Button::new("copy")
@@ -513,7 +513,7 @@ impl Render for ProfileDialog {
 
 fn label(label: &'static str, cx: &App) -> Div {
     div()
-        .text_xs()
+        .text_style(TextStyle::Caption)
         .text_color(cx.theme().text_muted)
         .font_semibold()
         .child(label)
@@ -533,5 +533,5 @@ fn field(
     v_flex()
         .gap_1p5()
         .child(label(text, cx))
-        .child(div().text_sm().text_color(color).child(content))
+        .child(div().text_style(TextStyle::Callout).text_color(color).child(content))
 }

crates/workspace/src/dialogs/relays.rs

@@ -11,7 +11,7 @@ use instant::Duration;
 use nostr_sdk::prelude::*;
 use smallvec::{SmallVec, smallvec};
 use state::NostrRegistry;
-use theme::{ActiveTheme, button_radius, panel_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius, panel_radius};
 use ui::button::{Button, ButtonVariants};
 use ui::input::{Input, InputEvent, InputState};
 use ui::menu::{DropdownMenu, PopupMenuItem};
@@ -108,10 +108,10 @@ impl RelayManager {
         let manager = cx.entity().downgrade();
 
         v_flex()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .child(
                 div()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child(SharedString::from(GOSSIP_MSG)),
             )
@@ -132,7 +132,7 @@ impl RelayManager {
                             .tooltip("Relay metadata")
                             .ghost()
                             .h(rems(2.))
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .dropdown_menu(move |menu, _window, _cx| {
                                 menu.item(metadata_item(&manager, RelayMetadata::Read))
                                     .item(metadata_item(&manager, RelayMetadata::Write))
@@ -153,7 +153,7 @@ impl RelayManager {
                 this.child(
                     div()
                         .italic()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_color(cx.theme().danger)
                         .child(error.clone()),
                 )
@@ -197,10 +197,10 @@ impl RelayManager {
 
     fn render_inbox(&mut self, cx: &mut Context<Self>) -> impl IntoElement {
         v_flex()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .child(
                 div()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child(SharedString::from(INBOX_MSG)),
             )
@@ -224,7 +224,7 @@ impl RelayManager {
                 this.child(
                     div()
                         .italic()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_color(cx.theme().danger)
                         .child(error.clone()),
                 )
@@ -607,7 +607,7 @@ impl Render for RelayManager {
 
         v_flex()
             .gap_4()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .child(self.render_tab_bar(cx))
             .child(content)
             .child(self.render_actions(cx))
@@ -651,15 +651,14 @@ fn relay_row(
         .child(
             h_flex()
                 .gap_1()
-                .text_sm()
+                .text_style(TextStyle::Callout)
                 .child(label)
                 .when_some(badge, |this, badge| {
                     this.child(
                         div()
                             .p_0p5()
                             .rounded_xs()
-                            .font_semibold()
-                            .text_size(px(8.))
+                            .text_style(TextStyle::Caption2)
                             .child(badge),
                     )
                 }),
@@ -683,7 +682,7 @@ fn empty_relays(cx: &App) -> impl IntoElement {
         .border_dashed()
         .border_color(cx.theme().border)
         .rounded(px(panel_radius()))
-        .text_sm()
+        .text_style(TextStyle::Callout)
         .text_align(TextAlign::Center)
         .child(SharedString::from("Please add some relays."))
 }

crates/workspace/src/dialogs/restore.rs

@@ -7,7 +7,7 @@ use gpui::{
 use instant::Duration;
 use nip4e::DeviceRegistry;
 use nostr_sdk::prelude::*;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::input::{Input, InputEvent, InputState};
 use ui::{IconName, StyledExt, WindowExtension, h_flex, v_flex};
@@ -100,11 +100,11 @@ impl Render for RestoreEncryption {
         v_flex()
             .size_full()
             .gap_3()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .child(
                 v_flex()
                     .gap_1()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .text_color(cx.theme().text_muted)
                     .child("Secret Key")
                     .child(Input::new(&self.key_input)),
@@ -124,7 +124,7 @@ impl Render for RestoreEncryption {
             .when_some(self.error.read(cx).as_ref(), |this, error| {
                 this.child(
                     div()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_center()
                         .text_color(cx.theme().danger)
                         .child(error.clone()),

crates/workspace/src/dialogs/screening.rs

@@ -12,7 +12,7 @@ use nostr_sdk::prelude::*;
 use person::{Person, PersonRegistry, shorten_pubkey};
 use smallvec::{SmallVec, smallvec};
 use state::{BOOTSTRAP_RELAYS, NostrAddress, NostrRegistry, TIMEOUT};
-use theme::{ActiveTheme, button_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::indicator::Indicator;
@@ -284,7 +284,7 @@ impl Screening {
                                     .px_2()
                                     .gap_1p5()
                                     .rounded(px(button_radius()))
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .hover(|this| this.bg(cx.theme().element_hover))
                                     .child(Avatar::new(profile.avatar()).small())
                                     .child(profile.name()),
@@ -345,7 +345,7 @@ impl Render for Screening {
                             .justify_center()
                             .rounded_full()
                             .bg(cx.theme().surface_raised)
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .truncate()
                             .text_ellipsis()
                             .text_center()
@@ -385,11 +385,11 @@ impl Render for Screening {
                     .child(
                         h_flex()
                             .items_start()
-                            .gap_2()
-                            .text_sm()
+                            .gap(px(theme::SPACE))
+                            .text_style(TextStyle::Callout)
                             .child(status_badge(Some(self.followed), cx))
                             .child(
-                                v_flex().text_sm().child("Contact").child(
+                                v_flex().text_style(TextStyle::Callout).child("Contact").child(
                                     div()
                                         .line_clamp(1)
                                         .text_color(cx.theme().text_muted)
@@ -406,12 +406,12 @@ impl Render for Screening {
                     .child(
                         h_flex()
                             .items_start()
-                            .gap_2()
-                            .text_sm()
+                            .gap(px(theme::SPACE))
+                            .text_style(TextStyle::Callout)
                             .child(status_badge(last_active, cx))
                             .child(
                                 v_flex()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child(
                                         h_flex()
                                             .gap_0p5()
@@ -446,11 +446,11 @@ impl Render for Screening {
                     .child(
                         h_flex()
                             .items_start()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .child(status_badge(Some(self.verified), cx))
                             .child(
                                 v_flex()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child({
                                         if let Some(addr) = self.address(cx) {
                                             SharedString::from(format!("{} validation", addr))
@@ -481,11 +481,11 @@ impl Render for Screening {
                     .child(
                         h_flex()
                             .items_start()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .child(status_badge(Some(mutuals > 0), cx))
                             .child(
                                 h_flex()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child(
                                         div()
                                             .line_clamp(1)

crates/workspace/src/dialogs/settings.rs

@@ -1,10 +1,10 @@
 use gpui::http_client::Url;
 use gpui::{
     App, AppContext, Context, Entity, IntoElement, ParentElement, Render, SharedString, Styled,
-    Window, div, px,
+    Window, div,
 };
 use settings::AppSettings;
-use theme::{ActiveTheme, AppExt as _, AppearanceMode};
+use theme::{ActiveTheme, AppExt as _, AppearanceMode, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::group_box::{GroupBox, GroupBoxVariants};
 use ui::input::{Input, InputState};
@@ -103,10 +103,14 @@ impl Render for Preferences {
                             .justify_between()
                             .child(
                                 v_flex()
-                                    .child(div().text_sm().child(SharedString::from("Mode")))
                                     .child(
                                         div()
-                                            .text_xs()
+                                            .text_style(TextStyle::Callout)
+                                            .child(SharedString::from("Mode")),
+                                    )
+                                    .child(
+                                        div()
+                                            .text_style(TextStyle::Caption)
                                             .text_color(cx.theme().text_muted)
                                             .child(SharedString::from(MODE)),
                                     ),
@@ -154,7 +158,7 @@ impl Render for Preferences {
                             .child(
                                 h_flex()
                                     .gap_1()
-                                    .child(Input::new(&self.file_input).text_xs().small())
+                                    .child(Input::new(&self.file_input).small())
                                     .child(
                                         Button::new("update-file-server")
                                             .icon(IconName::Check)
@@ -167,7 +171,7 @@ impl Render for Preferences {
                             )
                             .child(
                                 div()
-                                    .text_size(px(10.))
+                                    .text_style(TextStyle::Caption2)
                                     .italic()
                                     .text_color(cx.theme().text_faint)
                                     .child(SharedString::from("Only support blossom service")),

crates/workspace/src/lib.rs

@@ -14,7 +14,7 @@ use nostr_sdk::prelude::*;
 use serde::Deserialize;
 use smallvec::{SmallVec, smallvec};
 use state::{NostrRegistry, StateEvent};
-use theme::{ActiveTheme, SIDEBAR_WIDTH, Theme};
+use theme::{ActiveTheme, TextStyle, Typeset as _, SIDEBAR_WIDTH, Theme};
 use ui::button::Button;
 use ui::dock::{self, DockArea, DockLayout, DockPlacement, Panel, PanelHandle};
 use ui::notification::{Notification, NotificationKind};
@@ -415,7 +415,7 @@ impl Workspace {
                 .child(
                     v_flex()
                         .gap_1()
-                        .text_sm()
+                        .text_style(TextStyle::Callout)
                         .child(SharedString::from(ENC_MSG))
                         .child(
                             div()

crates/workspace/src/panels/backup.rs

@@ -1,12 +1,12 @@
 use anyhow::Error;
 use gpui::{
     AnyElement, App, AppContext, ClipboardItem, Context, Entity, EventEmitter, FocusHandle,
-    Focusable, IntoElement, ParentElement, Render, SharedString, Styled, Task, Window, div,
+    Focusable, IntoElement, ParentElement, Render, SharedString, Styled, Task, Window, div, px,
 };
 use instant::Duration;
 use nostr_sdk::prelude::*;
 use state::USER_KEYRING;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
 use ui::input::{Input, InputState};
@@ -132,24 +132,24 @@ impl Render for BackupPanel {
             .w_full()
             .child(
                 div()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child(SharedString::from(MSG)),
             )
             .child(divider(cx))
             .child(
                 v_flex()
-                    .gap_2()
+                    .gap(px(theme::SPACE))
                     .flex_1()
                     .w_full()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(
                         v_flex()
                             .gap_1p5()
                             .w_full()
                             .child(
                                 div()
-                                    .text_xs()
+                                    .text_style(TextStyle::Caption)
                                     .font_semibold()
                                     .text_color(cx.theme().text_muted)
                                     .child(SharedString::from("Public Key:")),
@@ -162,7 +162,7 @@ impl Render for BackupPanel {
                             .w_full()
                             .child(
                                 div()
-                                    .text_xs()
+                                    .text_style(TextStyle::Caption)
                                     .font_semibold()
                                     .text_color(cx.theme().text_muted)
                                     .child(SharedString::from("Secret Key:")),

crates/workspace/src/panels/browse.rs

@@ -13,7 +13,7 @@ use nip29::{Discovery, GroupCandidate, GroupKey, GroupsEvent, GroupsRegistry, Me
 use nostr_sdk::prelude::{RelayUrl, Timestamp};
 use settings::AppSettings;
 use smallvec::{SmallVec, smallvec};
-use theme::{ActiveTheme, button_radius, panel_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius, panel_radius};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{DockArea, DockPlacement, Panel, PanelEvent, PanelHandle};
@@ -268,7 +268,7 @@ impl BrowsePanel {
                     .min_w_0()
                     .child(
                         div()
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .font_semibold()
                             .line_height(relative(1.2))
                             .child("Public Groups"),
@@ -276,7 +276,7 @@ impl BrowsePanel {
                     .child(
                         div()
                             .truncate()
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .text_color(cx.theme().text_muted)
                             .map(|this| match &self.relay {
                                 Some(relay) => {
@@ -300,7 +300,6 @@ impl BrowsePanel {
                         Input::new(&self.input)
                             .appearance(false)
                             .small()
-                            .text_sm()
                             .flex_1(),
                     )
                     .child(
@@ -389,12 +388,12 @@ impl BrowsePanel {
                     .flex_1()
                     .min_h_0()
                     .p_2()
-                    .gap_2()
+                    .gap(px(theme::SPACE))
                     .child(
                         h_flex()
                             .w_full()
                             .items_center()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .when(!hide_avatar, |this| {
                                 this.child(Avatar::from_source(picture).seed(seed).flex_shrink_0())
                             })
@@ -404,7 +403,7 @@ impl BrowsePanel {
                                     .min_w_0()
                                     .child(
                                         div()
-                                            .text_sm()
+                                            .text_style(TextStyle::Callout)
                                             .truncate()
                                             .font_semibold()
                                             .line_height(relative(1.2))
@@ -413,7 +412,7 @@ impl BrowsePanel {
                                     .child(
                                         div()
                                             .truncate()
-                                            .text_xs()
+                                            .text_style(TextStyle::Caption)
                                             .text_color(cx.theme().text_faint)
                                             .child(relay),
                                     ),
@@ -422,7 +421,7 @@ impl BrowsePanel {
                     .child(
                         div()
                             .min_w_0()
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .text_color(cx.theme().text_muted)
                             .text_ellipsis()
                             .line_clamp(2)
@@ -443,7 +442,7 @@ impl BrowsePanel {
                             .child(Icon::new(IconName::Book))
                             .child(
                                 div()
-                                    .text_sm()
+                                    .text_style(TextStyle::Callout)
                                     .child(SharedString::from(format!("{members} members"))),
                             ),
                     ),
@@ -463,7 +462,7 @@ impl Panel for BrowsePanel {
     fn title(&self, cx: &App) -> AnyElement {
         h_flex()
             .gap_1()
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .child(
                 Icon::new(IconName::Compass)
                     .small()
@@ -543,7 +542,7 @@ fn notice(text: &'static str, cx: &App) -> AnyElement {
     h_flex()
         .size_full()
         .justify_center()
-        .text_sm()
+        .text_style(TextStyle::Callout)
         .text_color(cx.theme().text_muted)
         .child(text)
         .into_any_element()

crates/workspace/src/panels/contact_list.rs

@@ -12,7 +12,7 @@ use nostr_sdk::prelude::*;
 use person::PersonRegistry;
 use smallvec::{SmallVec, smallvec};
 use state::NostrRegistry;
-use theme::{ActiveTheme, button_radius, panel_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius, panel_radius};
 use ui::avatar::Avatar;
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
@@ -237,8 +237,8 @@ impl ContactListPanel {
                     .hover(|this| this.bg(cx.theme().element_hover))
                     .child(
                         h_flex()
-                            .gap_2()
-                            .text_sm()
+                            .gap(px(theme::SPACE))
+                            .text_style(TextStyle::Callout)
                             .child(
                                 Avatar::new(profile.avatar())
                                     .seed(profile.avatar_seed())
@@ -274,7 +274,7 @@ impl ContactListPanel {
             .border_dashed()
             .border_color(cx.theme().border)
             .rounded(px(panel_radius()))
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .text_align(TextAlign::Center)
             .child(SharedString::from("Please add some relays."))
     }
@@ -308,13 +308,13 @@ impl Render for ContactListPanel {
             .overflow_y_scrollbar()
             .child(
                 v_flex()
-                    .gap_2()
+                    .gap(px(theme::SPACE))
                     .flex_1()
                     .w_full()
-                    .text_sm()
+                    .text_style(TextStyle::Callout)
                     .child(
                         div()
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .font_semibold()
                             .text_color(cx.theme().text_muted)
                             .child("New contact:"),
@@ -342,7 +342,7 @@ impl Render for ContactListPanel {
                                 this.child(
                                     div()
                                         .italic()
-                                        .text_xs()
+                                        .text_style(TextStyle::Caption)
                                         .text_color(cx.theme().danger)
                                         .child(error.clone()),
                                 )

crates/workspace/src/panels/greeter.rs

@@ -1,9 +1,9 @@
 use gpui::{
     AnyElement, App, AppContext, Context, Entity, EventEmitter, FocusHandle, Focusable,
-    IntoElement, ParentElement, Render, SharedString, Styled, Window, div, svg,
+    IntoElement, ParentElement, Render, SharedString, Styled, Window, div, px, svg,
 };
 use state::NostrRegistry;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{Panel, PanelEvent};
 use ui::{Icon, IconName, Sizable, StyledExt, h_flex, v_flex};
@@ -44,7 +44,7 @@ impl Panel for GreeterPanel {
     fn title(&self, cx: &App) -> AnyElement {
         h_flex()
             .gap_1()
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .child(
                 svg()
                     .path("brand/coop.svg")
@@ -84,7 +84,7 @@ impl Render for GreeterPanel {
                     .child(
                         h_flex()
                             .mb_4()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .w_full()
                             .child(
                                 svg()
@@ -102,7 +102,7 @@ impl Render for GreeterPanel {
                                     )
                                     .child(
                                         div()
-                                            .text_xs()
+                                            .text_style(TextStyle::Caption)
                                             .text_color(cx.theme().text_muted)
                                             .child(SharedString::from(DESCRIPTION)),
                                     ),
@@ -110,13 +110,13 @@ impl Render for GreeterPanel {
                     )
                     .child(
                         v_flex()
-                            .gap_2()
+                            .gap(px(theme::SPACE))
                             .w_full()
                             .child(
                                 h_flex()
-                                    .gap_2()
+                                    .gap(px(theme::SPACE))
                                     .w_full()
-                                    .text_xs()
+                                    .text_style(TextStyle::Caption)
                                     .font_semibold()
                                     .text_color(cx.theme().text_muted)
                                     .child(SharedString::from("Get Started"))
@@ -124,7 +124,7 @@ impl Render for GreeterPanel {
                             )
                             .child(
                                 v_flex()
-                                    .gap_2()
+                                    .gap(px(theme::SPACE))
                                     .w_full()
                                     .justify_start()
                                     .items_start()

crates/workspace/src/panels/inbox.rs

@@ -2,7 +2,7 @@ use gpui::{
     AnyElement, App, AppContext, Context, Entity, EventEmitter, FocusHandle, Focusable,
     IntoElement, ParentElement, Render, SharedString, Styled, Window,
 };
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::dock::{Panel, PanelEvent};
 use ui::{Icon, IconName, Sizable, h_flex};
 
@@ -55,7 +55,7 @@ impl Render for InboxPanel {
         h_flex()
             .size_full()
             .justify_center()
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .text_color(cx.theme().text_muted)
             .child(self.name.clone())
     }

crates/workspace/src/sidebar/group_view.rs

@@ -11,7 +11,7 @@ use nostr_sdk::prelude::*;
 use person::PersonRegistry;
 use settings::AppSettings;
 use state::NostrRegistry;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::avatar::Avatar;
 use ui::menu::{DropdownMenu, PopupMenuItem};
 use ui::nav::Nav;
@@ -131,7 +131,7 @@ impl Sidebar {
             .flex_1()
             .min_h_0()
             .w_full()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .child(
                 h_flex()
                     .px_2()
@@ -149,7 +149,7 @@ impl Sidebar {
                                     .min_w_0()
                                     .child(
                                         div()
-                                            .text_xs()
+                                            .text_style(TextStyle::Caption)
                                             .truncate()
                                             .line_height(relative(1.2))
                                             .font_semibold()
@@ -157,7 +157,7 @@ impl Sidebar {
                                     )
                                     .child(
                                         div()
-                                            .text_size(px(10.))
+                                            .text_style(TextStyle::Caption2)
                                             .text_color(cx.theme().text_muted)
                                             .child(total_members),
                                     ),
@@ -231,7 +231,7 @@ impl Sidebar {
         Nav::new(label)
             .label(label)
             .suffix(Icon::new(icon).small().text_color(cx.theme().text_faint))
-            .text_xs()
+            .text_style(TextStyle::Caption)
             .font_semibold()
             .text_color(cx.theme().text_faint)
             .on_click(cx.listener(move |this, _event, _window, cx| {
@@ -262,7 +262,7 @@ impl Sidebar {
 
         Nav::new(public_key.to_hex())
             .label(person.name())
-            .text_sm()
+            .text_style(TextStyle::Callout)
             .font_medium()
             .clickable(true)
             .when(!hide_avatar, |this| {
@@ -277,7 +277,7 @@ impl Sidebar {
                 this.suffix(
                     div()
                         .truncate()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .text_color(cx.theme().text_faint)
                         .child(SharedString::from(roles.join(", "))),
                 )

crates/workspace/src/sidebar/header.rs

@@ -33,7 +33,7 @@ impl Sidebar {
             .h(TABBAR_HEIGHT)
             .flex_shrink_0()
             .items_center()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .px_2()
             .when(cfg!(target_os = "macos"), |this| {
                 this.pl(px(TRAFFIC_LIGHT_PADDING))
@@ -120,7 +120,7 @@ impl Sidebar {
         let staged = updater.read(cx).staged();
 
         h_flex()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .when(!up_to_date, |this| {
                 this.child(
                     Button::new("update")

crates/workspace/src/sidebar/inbox.rs

@@ -6,7 +6,7 @@ use gpui::{
 };
 use nostr_sdk::prelude::*;
 use state::NostrRegistry;
-use theme::ActiveTheme;
+use theme::{ActiveTheme, TextStyle, Typeset as _};
 use ui::button::{Button, ButtonVariants};
 use ui::dock::{DockPlacement, PanelHandle};
 use ui::notification::Notification;
@@ -208,7 +208,7 @@ impl Sidebar {
             .child(
                 h_flex()
                     .gap_1()
-                    .text_xs()
+                    .text_style(TextStyle::Caption)
                     .text_color(cx.theme().text_muted)
                     .child("Selected")
                     .child(

crates/workspace/src/sidebar/list.rs

@@ -8,7 +8,7 @@ use gpui::{
 };
 use nip29::GroupsRegistry;
 use settings::AppSettings;
-use theme::{ActiveTheme, control_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, control_radius};
 use ui::nav_item::NavItem;
 use ui::scroll::Scrollbar;
 use ui::{Icon, IconName, Sizable, StyledExt, h_flex, v_flex};
@@ -61,7 +61,7 @@ impl Sidebar {
             .flex_1()
             .min_h_0()
             .relative()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .child(
                 v_flex()
                     .px_2()
@@ -85,7 +85,7 @@ impl Sidebar {
                                                 .px_1()
                                                 .min_w_6()
                                                 .justify_center()
-                                                .text_size(px(10.))
+                                                .text_style(TextStyle::Caption2)
                                                 .text_color(cx.theme().text_muted)
                                                 .text_center()
                                                 .rounded(px(control_radius()))
@@ -118,7 +118,7 @@ impl Sidebar {
                 this.child(
                     div()
                         .px_4()
-                        .text_xs()
+                        .text_style(TextStyle::Caption)
                         .font_semibold()
                         .text_color(cx.theme().text_faint)
                         .child(list_title),

crates/workspace/src/sidebar/mod.rs

@@ -7,7 +7,7 @@ use gpui::prelude::FluentBuilder;
 use gpui::{
     AnyElement, App, AppContext, Context, Entity, EventEmitter, FocusHandle, Focusable,
     InteractiveElement, IntoElement, ObjectFit, ParentElement, Render, SharedString, Styled,
-    StyledImage, Subscription, Task, UniformListScrollHandle, WeakEntity, Window, div, img,
+    StyledImage, Subscription, Task, UniformListScrollHandle, WeakEntity, Window, div, img, px,
     retain_all,
 };
 use instant::Duration;
@@ -15,7 +15,7 @@ use nip29::{Group, GroupKey, GroupsEvent, GroupsRegistry};
 use nostr_sdk::prelude::*;
 use smallvec::{SmallVec, smallvec};
 use state::{FIND_DELAY, NostrRegistry, StateEvent};
-use theme::{ActiveTheme, TABBAR_HEIGHT};
+use theme::{ActiveTheme, TABBAR_HEIGHT, TextStyle, Typeset as _};
 use ui::dock::{DockArea, Panel, PanelEvent};
 use ui::indicator::Indicator;
 use ui::input::{InputEvent, InputState};
@@ -276,7 +276,7 @@ impl Render for Sidebar {
             .image_cache(retain_all("sidebar"))
             .size_full()
             .relative()
-            .gap_2()
+            .gap(px(theme::SPACE))
             .bg(cx.theme().surface)
             .when_some(current_user.as_ref(), |this, current_user| {
                 this.child(title_bar_drag_handlers(
@@ -326,14 +326,14 @@ impl Render for Sidebar {
                         .px_8()
                         .child(
                             h_flex()
-                                .gap_2()
+                                .gap(px(theme::SPACE))
                                 .w_full()
                                 .h_9()
                                 .justify_center()
                                 .bg(cx.theme().bg.opacity(0.85))
                                 .when(cx.theme().shadow, |this| this.shadow_md())
                                 .rounded_full()
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .font_semibold()
                                 .text_color(cx.theme().text_muted)
                                 .child(Indicator::new().small().color(cx.theme().accent))

crates/workspace/src/sidebar/rows.rs

@@ -11,7 +11,7 @@ use nip29::Group;
 use nostr_sdk::prelude::*;
 use person::PersonRegistry;
 use settings::AppSettings;
-use theme::{ActiveTheme, button_radius};
+use theme::{ActiveTheme, TextStyle, Typeset as _, button_radius};
 use ui::avatar::Avatar;
 use ui::dialog::DialogButtonProps;
 use ui::dock::{ClosePanel, DockArea, DockPlacement, PanelHandle};
@@ -90,7 +90,7 @@ impl Sidebar {
                         Nav::new(label)
                             .label(label)
                             .suffix(Icon::new(icon).small().text_color(cx.theme().text_faint))
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .font_semibold()
                             .text_color(cx.theme().text_faint)
                             .on_click(cx.listener(move |this, _event, _window, cx| {
@@ -112,7 +112,7 @@ impl Sidebar {
 
                         Nav::new(label)
                             .label(label)
-                            .text_xs()
+                            .text_style(TextStyle::Caption)
                             .font_semibold()
                             .text_color(cx.theme().text_faint)
                             .into_any_element()
@@ -131,7 +131,7 @@ impl Sidebar {
                                 .border_dashed()
                                 .border_color(cx.theme().border)
                                 .rounded(px(button_radius()))
-                                .text_xs()
+                                .text_style(TextStyle::Caption)
                                 .text_color(cx.theme().text_faint)
                                 .child(*text),
                         )
@@ -149,7 +149,7 @@ impl Sidebar {
 
                         let nav = Nav::new(index)
                             .label(name)
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .when(!hide_avatar, |this| {
                                 this.prefix(
                                     Avatar::from_source(picture)
@@ -161,7 +161,7 @@ impl Sidebar {
                             .suffix(
                                 div()
                                     .font_normal()
-                                    .text_xs()
+                                    .text_style(TextStyle::Caption)
                                     .text_color(cx.theme().text_faint)
                                     .child(created_at),
                             )
@@ -204,7 +204,7 @@ impl Sidebar {
 
                         Nav::new(index)
                             .label(person.name())
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .when(!hide_avatar, |this| {
                                 this.prefix(
                                     Avatar::from_source(person.avatar())
@@ -230,7 +230,7 @@ impl Sidebar {
 
                         Nav::new(index)
                             .label(person.name())
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .when(!hide_avatar, |this| {
                                 this.prefix(
                                     Avatar::from_source(person.avatar())
@@ -265,7 +265,7 @@ impl Sidebar {
 
                         let nav = Nav::new(index)
                             .label(name)
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .when(!hide_avatar, |this| {
                                 this.prefix(
                                     Avatar::from_source(picture)
@@ -278,7 +278,7 @@ impl Sidebar {
                                 this.suffix(
                                     div()
                                         .font_normal()
-                                        .text_xs()
+                                        .text_style(TextStyle::Caption)
                                         .text_color(cx.theme().text_faint)
                                         .child(suffix),
                                 )
@@ -339,7 +339,7 @@ impl Sidebar {
 
                         Nav::new(index)
                             .label(content)
-                            .text_sm()
+                            .text_style(TextStyle::Callout)
                             .font_medium()
                             .when(!hide_avatar, |this| {
                                 this.prefix(
@@ -352,7 +352,7 @@ impl Sidebar {
                             .suffix(
                                 div()
                                     .font_normal()
-                                    .text_xs()
+                                    .text_style(TextStyle::Caption)
                                     .text_color(cx.theme().text_faint)
                                     .child(detail),
                             )

crates/workspace/src/sidebar/search.rs

@@ -203,12 +203,7 @@ impl Sidebar {
                     .w_full()
                     .rounded(px(button_radius()))
                     .bg(cx.theme().surface_raised)
-                    .child(
-                        Input::new(&self.find_input)
-                            .appearance(false)
-                            .small()
-                            .text_xs(),
-                    )
+                    .child(Input::new(&self.find_input).appearance(false).small())
                     .child(
                         Button::new("sidebar-global")
                             .icon(IconName::Compass)