fix(ui): stop body data-theme from shadowing theme preset tokens

applyTheme() mirrors the active mode onto <body> as data-theme="dark", but
the theme preset is only ever written to <html>. The palette token blocks in
tokens/colors.css and base.css used the bare attribute selector
[data-theme="dark"], so <body> matched them on its own and re-declared the
default dark palette (#1a1a1a / #2d2d2d / ...) directly on the body, where it
shadowed the preset values inherited from <html>. Every non-default preset
therefore painted the selected accent over the default preset's background,
surface, text and border tokens, and flipped into that state ~200ms after
load, when initTheme() first touched <body> — the accent-tinted background
flash seen on reload and nav-tab switches. Reached only in dark mode, since
light mode has no [data-theme="light"] token block.

Scope the palette token blocks to :root so a data-theme attribute on any
descendant (only <body> has one) can no longer re-declare them; descendant
rules such as [data-theme="dark"] .foo still match through <html>. Add a
regression guard that fails on bare attribute token blocks.
This commit is contained in:
Will Miao
2026-09-27 21:48:58 +08:00
parent 0a262cbe0c
commit 0dd8d74032
4 changed files with 81 additions and 13 deletions
+1 -1
View File
@@ -81,7 +81,7 @@ body {
--badge-skip-refresh-glow: var(--color-skip-refresh-glow);
}
[data-theme="dark"] {
:root[data-theme="dark"] {
--bg-color: var(--bg-base);
--text-color: var(--text-primary);
--text-muted: var(--text-secondary);
+1 -1
View File
@@ -572,7 +572,7 @@
}
/* Dark mode: use each preset's dark-mode accent lightness for visibility.
These match the --color-accent-l values from [data-theme="dark"][data-theme-preset="..."]
These match the --color-accent-l values from :root[data-theme="dark"][data-theme-preset="..."]
in tokens/colors.css so the swatch accurately previews what the theme looks like. */
[data-theme="dark"] .preset-swatch-default {
+11 -11
View File
@@ -78,7 +78,7 @@
--favorite-glow: oklch(65% 0.15 85 / 0.5);
}
[data-theme="dark"] {
:root[data-theme="dark"] {
--bg-base: #1a1a1a;
--bg-elevated: oklch(25% 0.02 256 / 0.98);
--bg-overlay: oklch(0% 0 0 / 0.75);
@@ -118,7 +118,7 @@
/* ── Preset: Nord ──────────────────────────────────────────── */
[data-theme-preset="nord"] {
:root[data-theme-preset="nord"] {
--color-accent-h: 213;
--color-accent-c: 0.18;
--color-accent-l: 62%;
@@ -152,7 +152,7 @@
--favorite-glow: oklch(72% 0.14 85 / 0.5);
}
[data-theme="dark"][data-theme-preset="nord"] {
:root[data-theme="dark"][data-theme-preset="nord"] {
--color-accent-h: 213;
--color-accent-c: 0.18;
--color-accent-l: 68%;
@@ -188,7 +188,7 @@
/* ── Preset: Midnight ───────────────────────────────────────── */
[data-theme-preset="midnight"] {
:root[data-theme-preset="midnight"] {
--color-accent-h: 300;
--color-accent-c: 0.15;
--color-accent-l: 52%;
@@ -222,7 +222,7 @@
--favorite-glow: oklch(72% 0.16 85 / 0.5);
}
[data-theme="dark"][data-theme-preset="midnight"] {
:root[data-theme="dark"][data-theme-preset="midnight"] {
--color-accent-h: 300;
--color-accent-c: 0.14;
--color-accent-l: 68%;
@@ -258,7 +258,7 @@
/* ── Preset: Monokai ───────────────────────────────────────── */
[data-theme-preset="monokai"] {
:root[data-theme-preset="monokai"] {
--color-accent-h: 190;
--color-accent-c: 0.24;
--color-accent-l: 72%;
@@ -291,7 +291,7 @@
--favorite-glow: oklch(72% 0.16 85 / 0.5);
}
[data-theme="dark"][data-theme-preset="monokai"] {
:root[data-theme="dark"][data-theme-preset="monokai"] {
--color-accent-h: 190;
--color-accent-c: 0.24;
--color-accent-l: 72%;
@@ -326,7 +326,7 @@
/* ── Preset: Dracula ───────────────────────────────────────── */
[data-theme-preset="dracula"] {
:root[data-theme-preset="dracula"] {
--color-accent-h: 265;
--color-accent-c: 0.24;
--color-accent-l: 68%;
@@ -359,7 +359,7 @@
--favorite-glow: oklch(72% 0.16 85 / 0.5);
}
[data-theme="dark"][data-theme-preset="dracula"] {
:root[data-theme="dark"][data-theme-preset="dracula"] {
--color-accent-h: 265;
--color-accent-c: 0.24;
--color-accent-l: 72%;
@@ -394,7 +394,7 @@
/* ── Preset: Solarized ─────────────────────────────────────── */
[data-theme-preset="solarized"] {
:root[data-theme-preset="solarized"] {
--color-accent-h: 175;
--color-accent-c: 0.18;
--color-accent-l: 55%;
@@ -429,7 +429,7 @@
--favorite-glow: oklch(68% 0.16 75 / 0.5);
}
[data-theme="dark"][data-theme-preset="solarized"] {
:root[data-theme="dark"][data-theme-preset="solarized"] {
--color-accent-h: 175;
--color-accent-c: 0.18;
--color-accent-l: 60%;