/* ============================================================
   CORTEX — desktop study OS
   Shared design tokens + base + component styles
   Theme tokens re-skin live (mirrors Omarchy palette swap)
   ============================================================ */

/* ---------- FONTS ---------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;1,400&family=JetBrains+Mono:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400&display=swap');

/* ============================================================
   THEME PALETTES  (semantic tokens defined per data-theme)
   Component CSS references ONLY semantic tokens below.
   ============================================================ */

/* ---- OSAKA JADE (default) — authentic Omarchy palette ---- */
[data-theme="osaka-jade"] {
  --bg:           #0e1813;
  --bg-sunken:    #0a120e;
  --surface:      #111c18;
  --surface-2:    #16241e;
  --surface-3:    #1d2f27;
  --border:       #213429;
  --border-strong:#2c4537;
  --fg:           #c1c497;
  --fg-bright:    #f6f5dd;
  --fg-muted:     #8a9a7e;
  --fg-faint:     #53685b;

  --accent:       #2dd5b7;
  --accent-dim:   #1f9d87;
  --accent-fg:    #07140f;

  --mode-normal:  #2dd5b7;
  --mode-insert:  #63b07a;
  --mode-select:  #d2689c;

  --ok:           #63b07a;
  --warn:         #e5c736;
  --err:          #ff5345;
  --info:         #acd4cf;

  --diff-add-bg:  rgba(99,176,122,0.13);
  --diff-add-bd:  rgba(99,176,122,0.45);
  --diff-del-bg:  rgba(255,83,69,0.11);
  --diff-del-bd:  rgba(255,83,69,0.42);

  --sel-bg:       rgba(210,104,156,0.20);
  --search-hl:    rgba(229,199,54,0.28);
}

/* ---- TOKYO NIGHT ---- */
[data-theme="tokyo-night"] {
  --bg:           #1a1b26;
  --bg-sunken:    #16161e;
  --surface:      #1e2030;
  --surface-2:    #24283b;
  --surface-3:    #2c3148;
  --border:       #292e42;
  --border-strong:#3b4261;
  --fg:           #c0caf5;
  --fg-bright:    #ffffff;
  --fg-muted:     #828bb8;
  --fg-faint:     #565f89;

  --accent:       #7aa2f7;
  --accent-dim:   #5a7fd6;
  --accent-fg:    #0c1020;

  --mode-normal:  #7aa2f7;
  --mode-insert:  #9ece6a;
  --mode-select:  #bb9af7;

  --ok:           #9ece6a;
  --warn:         #e0af68;
  --err:          #f7768e;
  --info:         #7dcfff;

  --diff-add-bg:  rgba(158,206,106,0.13);
  --diff-add-bd:  rgba(158,206,106,0.45);
  --diff-del-bg:  rgba(247,118,142,0.11);
  --diff-del-bd:  rgba(247,118,142,0.42);

  --sel-bg:       rgba(187,154,247,0.20);
  --search-hl:    rgba(224,175,104,0.28);
}

/* ---- CATPPUCCIN MOCHA ---- */
[data-theme="catppuccin"] {
  --bg:           #1e1e2e;
  --bg-sunken:    #181825;
  --surface:      #232336;
  --surface-2:    #2a2a3f;
  --surface-3:    #313244;
  --border:       #313244;
  --border-strong:#45475a;
  --fg:           #cdd6f4;
  --fg-bright:    #ffffff;
  --fg-muted:     #a6adc8;
  --fg-faint:     #6c7086;

  --accent:       #94e2d5;
  --accent-dim:   #6cc4b5;
  --accent-fg:    #11131c;

  --mode-normal:  #89b4fa;
  --mode-insert:  #a6e3a1;
  --mode-select:  #cba6f7;

  --ok:           #a6e3a1;
  --warn:         #f9e2af;
  --err:          #f38ba8;
  --info:         #89dceb;

  --diff-add-bg:  rgba(166,227,161,0.13);
  --diff-add-bd:  rgba(166,227,161,0.45);
  --diff-del-bg:  rgba(243,139,168,0.11);
  --diff-del-bd:  rgba(243,139,168,0.42);

  --sel-bg:       rgba(203,166,247,0.20);
  --search-hl:    rgba(249,226,175,0.28);
}

/* ---- GRUVBOX (dark medium) ---- */
[data-theme="gruvbox"] {
  --bg:           #282828;
  --bg-sunken:    #1d2021;
  --surface:      #32302f;
  --surface-2:    #3c3836;
  --surface-3:    #504945;
  --border:       #3c3836;
  --border-strong:#504945;
  --fg:           #ebdbb2;
  --fg-bright:    #fbf1c7;
  --fg-muted:     #a89984;
  --fg-faint:     #7c6f64;
  --accent:       #fabd2f;
  --accent-dim:   #d79921;
  --accent-fg:    #1d2021;
  --mode-normal:  #fabd2f;
  --mode-insert:  #b8bb26;
  --mode-select:  #d3869b;
  --ok:           #b8bb26;
  --warn:         #fabd2f;
  --err:          #fb4934;
  --info:         #83a598;
  --diff-add-bg:  rgba(184,187,38,0.13);
  --diff-add-bd:  rgba(184,187,38,0.45);
  --diff-del-bg:  rgba(251,73,52,0.11);
  --diff-del-bd:  rgba(251,73,52,0.42);
  --sel-bg:       rgba(211,134,155,0.20);
  --search-hl:    rgba(250,189,47,0.28);
}

/* ---- NORD ---- */
[data-theme="nord"] {
  --bg:           #2e3440;
  --bg-sunken:    #272c36;
  --surface:      #3b4252;
  --surface-2:    #434c5e;
  --surface-3:    #4c566a;
  --border:       #3b4252;
  --border-strong:#4c566a;
  --fg:           #d8dee9;
  --fg-bright:    #eceff4;
  --fg-muted:     #8893a8;
  --fg-faint:     #616e88;
  --accent:       #88c0d0;
  --accent-dim:   #6a9aaa;
  --accent-fg:    #2e3440;
  --mode-normal:  #88c0d0;
  --mode-insert:  #a3be8c;
  --mode-select:  #b48ead;
  --ok:           #a3be8c;
  --warn:         #ebcb8b;
  --err:          #bf616a;
  --info:         #81a1c1;
  --diff-add-bg:  rgba(163,190,140,0.13);
  --diff-add-bd:  rgba(163,190,140,0.45);
  --diff-del-bg:  rgba(191,97,106,0.11);
  --diff-del-bd:  rgba(191,97,106,0.42);
  --sel-bg:       rgba(180,142,173,0.20);
  --search-hl:    rgba(235,203,139,0.28);
}

/* ---- DRACULA ---- */
[data-theme="dracula"] {
  --bg:           #282a36;
  --bg-sunken:    #21222c;
  --surface:      #343746;
  --surface-2:    #3c3f51;
  --surface-3:    #44475a;
  --border:       #3a3d4d;
  --border-strong:#44475a;
  --fg:           #f8f8f2;
  --fg-bright:    #ffffff;
  --fg-muted:     #b9bcca;
  --fg-faint:     #6272a4;
  --accent:       #bd93f9;
  --accent-dim:   #9a73d6;
  --accent-fg:    #21222c;
  --mode-normal:  #bd93f9;
  --mode-insert:  #50fa7b;
  --mode-select:  #ff79c6;
  --ok:           #50fa7b;
  --warn:         #f1fa8c;
  --err:          #ff5555;
  --info:         #8be9fd;
  --diff-add-bg:  rgba(80,250,123,0.13);
  --diff-add-bd:  rgba(80,250,123,0.45);
  --diff-del-bg:  rgba(255,85,85,0.11);
  --diff-del-bd:  rgba(255,85,85,0.42);
  --sel-bg:       rgba(255,121,198,0.20);
  --search-hl:    rgba(241,250,140,0.28);
}

/* ---- ROSE PINE ---- */
[data-theme="rose-pine"] {
  --bg:           #191724;
  --bg-sunken:    #14121f;
  --surface:      #1f1d2e;
  --surface-2:    #26233a;
  --surface-3:    #2a2739;
  --border:       #26233a;
  --border-strong:#403d52;
  --fg:           #e0def4;
  --fg-bright:    #ffffff;
  --fg-muted:     #908caa;
  --fg-faint:     #6e6a86;
  --accent:       #ebbcba;
  --accent-dim:   #d7827e;
  --accent-fg:    #191724;
  --mode-normal:  #9ccfd8;
  --mode-insert:  #31748f;
  --mode-select:  #c4a7e7;
  --ok:           #9ccfd8;
  --warn:         #f6c177;
  --err:          #eb6f92;
  --info:         #c4a7e7;
  --diff-add-bg:  rgba(156,207,216,0.13);
  --diff-add-bd:  rgba(156,207,216,0.45);
  --diff-del-bg:  rgba(235,111,146,0.11);
  --diff-del-bd:  rgba(235,111,146,0.42);
  --sel-bg:       rgba(196,167,231,0.20);
  --search-hl:    rgba(246,193,119,0.28);
}

/* ---- EVERFOREST (dark medium) ---- */
[data-theme="everforest"] {
  --bg:           #2d353b;
  --bg-sunken:    #272e33;
  --surface:      #343f44;
  --surface-2:    #3d484d;
  --surface-3:    #475258;
  --border:       #3d484d;
  --border-strong:#475258;
  --fg:           #d3c6aa;
  --fg-bright:    #e6e2cc;
  --fg-muted:     #9da9a0;
  --fg-faint:     #7a8478;
  --accent:       #a7c080;
  --accent-dim:   #83a06a;
  --accent-fg:    #2d353b;
  --mode-normal:  #a7c080;
  --mode-insert:  #83c092;
  --mode-select:  #d699b6;
  --ok:           #a7c080;
  --warn:         #dbbc7f;
  --err:          #e67e80;
  --info:         #7fbbb3;
  --diff-add-bg:  rgba(167,192,128,0.13);
  --diff-add-bd:  rgba(167,192,128,0.45);
  --diff-del-bg:  rgba(230,126,128,0.11);
  --diff-del-bd:  rgba(230,126,128,0.42);
  --sel-bg:       rgba(214,153,182,0.20);
  --search-hl:    rgba(219,188,127,0.28);
}

/* ---- SOLARIZED (dark) ---- */
[data-theme="solarized"] {
  --bg:           #002b36;
  --bg-sunken:    #00252e;
  --surface:      #073642;
  --surface-2:    #0a4250;
  --surface-3:    #0e4b5a;
  --border:       #0a4250;
  --border-strong:#0e4b5a;
  --fg:           #839496;
  --fg-bright:    #93a1a1;
  --fg-muted:     #657b83;
  --fg-faint:     #586e75;
  --accent:       #268bd2;
  --accent-dim:   #1e6fa8;
  --accent-fg:    #002b36;
  --mode-normal:  #268bd2;
  --mode-insert:  #859900;
  --mode-select:  #6c71c4;
  --ok:           #859900;
  --warn:         #b58900;
  --err:          #dc322f;
  --info:         #2aa198;
  --diff-add-bg:  rgba(133,153,0,0.13);
  --diff-add-bd:  rgba(133,153,0,0.45);
  --diff-del-bg:  rgba(220,50,47,0.11);
  --diff-del-bd:  rgba(220,50,47,0.42);
  --sel-bg:       rgba(108,113,196,0.20);
  --search-hl:    rgba(181,137,0,0.28);
}

/* ---- KANAGAWA (wave) ---- */
[data-theme="kanagawa"] {
  --bg:           #1f1f28;
  --bg-sunken:    #16161d;
  --surface:      #2a2a37;
  --surface-2:    #363646;
  --surface-3:    #3a3a4a;
  --border:       #2d2d3d;
  --border-strong:#54546d;
  --fg:           #dcd7ba;
  --fg-bright:    #f2f1ef;
  --fg-muted:     #a6a08c;
  --fg-faint:     #727169;
  --accent:       #7e9cd8;
  --accent-dim:   #6080c0;
  --accent-fg:    #1f1f28;
  --mode-normal:  #7e9cd8;
  --mode-insert:  #98bb6c;
  --mode-select:  #957fb8;
  --ok:           #98bb6c;
  --warn:         #e6c384;
  --err:          #c34043;
  --info:         #7fb4ca;
  --diff-add-bg:  rgba(152,187,108,0.13);
  --diff-add-bd:  rgba(152,187,108,0.45);
  --diff-del-bg:  rgba(195,64,67,0.11);
  --diff-del-bd:  rgba(195,64,67,0.42);
  --sel-bg:       rgba(149,127,184,0.20);
  --search-hl:    rgba(230,195,132,0.28);
}

/* ============================================================
   NON-THEMED TOKENS (constant across palettes)
   ============================================================ */
:root {
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-read: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --read-size: 16.5px;

  /* type scale (mono chrome) */
  --t-2xs: 10.5px;
  --t-xs:  11.5px;
  --t-sm:  12.5px;
  --t-md:  13.5px;
  --t-lg:  15px;
  --t-xl:  18px;
  --t-2xl: 22px;

  /* reading scale (serif) */
  --r-sm: 14.5px;
  --r-md: 16.5px;
  --r-lg: 19px;
  --r-xl: 24px;
  --r-2xl: 32px;

  /* spacing — 4px base */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-7: 32px; --sp-8: 40px;
  --sp-9: 48px; --sp-10: 64px;

  /* radii — tight, terminal-grade */
  --rad-1: 2px; --rad-2: 4px; --rad-3: 6px; --rad-4: 8px; --rad-pill: 999px;

  /* elevation — restrained; borders do most of the work */
  --shadow-1: 0 1px 2px rgba(0,0,0,0.30);
  --shadow-2: 0 4px 14px rgba(0,0,0,0.38);
  --shadow-pop: 0 18px 48px rgba(0,0,0,0.55), 0 2px 8px rgba(0,0,0,0.4);

  --dur-fast: 90ms;
  --dur: 160ms;
  --dur-slow: 240ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ============================================================
   BASE / RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: var(--t-md);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss02", "cv01";
}
::selection { background: var(--sel-bg); color: var(--fg-bright); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--rad-pill);
  border: 3px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--fg-faint); background-clip: padding-box; }

h1,h2,h3,h4,h5,p { margin: 0; }
button { font: inherit; color: inherit; }
a { color: inherit; }

/* ============================================================
   TYPOGRAPHIC PRIMITIVES
   ============================================================ */
.mono { font-family: var(--font-mono); }
.read { font-family: var(--font-read); }

.label {
  font-family: var(--font-mono);
  font-size: var(--t-2xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ============================================================
   KBD — keyboard hint chip
   ============================================================ */
.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-family: var(--font-mono);
  font-size: var(--t-2xs);
  font-weight: 600;
  line-height: 1;
  color: var(--fg-muted);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: var(--rad-2);
  white-space: nowrap;
}
.kbd--accent { color: var(--accent); border-color: var(--accent-dim); }
.kbd-row { display: inline-flex; align-items: center; gap: 3px; }

/* ============================================================
   BADGES / CHIPS
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 18px;
  padding: 0 7px;
  font-size: var(--t-2xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--rad-2);
  border: 1px solid var(--border-strong);
  color: var(--fg-muted);
  background: var(--surface-2);
  white-space: nowrap;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge--pdf   { color: #ff8d7a; border-color: rgba(255,83,69,0.35); }
.badge--pptx  { color: var(--warn); border-color: color-mix(in oklab, var(--warn) 35%, transparent); }
.badge--docx  { color: var(--info); border-color: color-mix(in oklab, var(--info) 35%, transparent); }
.badge--web   { color: var(--accent); border-color: var(--accent-dim); }
.badge--yt    { color: #ff5d5d; border-color: rgba(255,83,69,0.4); }
.badge--audio { color: var(--mode-select); border-color: color-mix(in oklab, var(--mode-select) 35%, transparent); }
.badge--image { color: var(--ok); border-color: color-mix(in oklab, var(--ok) 35%, transparent); }

.badge--ok   { color: var(--ok); border-color: color-mix(in oklab, var(--ok) 40%, transparent); background: color-mix(in oklab, var(--ok) 10%, var(--surface)); }
.badge--warn { color: var(--warn); border-color: color-mix(in oklab, var(--warn) 40%, transparent); background: color-mix(in oklab, var(--warn) 10%, var(--surface)); }
.badge--err  { color: var(--err); border-color: color-mix(in oklab, var(--err) 40%, transparent); background: color-mix(in oklab, var(--err) 10%, var(--surface)); }

/* status pill (cheatsheet ready / needs review) */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--t-xs); font-weight: 500;
  color: var(--fg-muted);
}
.status-pill .dot { width: 7px; height: 7px; border-radius: 50%; flex: none; }
.status-pill--ready .dot   { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in oklab, var(--ok) 22%, transparent); }
.status-pill--review .dot  { background: var(--warn); box-shadow: 0 0 0 3px color-mix(in oklab, var(--warn) 22%, transparent); }
.status-pill--draft .dot   { background: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 22%, transparent); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 30px;
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--fg);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--rad-2);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn:hover { background: var(--surface-3); border-color: var(--fg-faint); color: var(--fg-bright); }
.btn:active { transform: translateY(0.5px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:disabled:hover { background: var(--surface-2); border-color: var(--border-strong); color: var(--fg); }

.btn--primary {
  color: var(--accent-fg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}
.btn--primary:hover { background: color-mix(in oklab, var(--accent) 88%, white); border-color: var(--accent); color: var(--accent-fg); }
.btn--ghost { background: transparent; border-color: transparent; color: var(--fg-muted); }
.btn--ghost:hover { background: var(--surface-2); border-color: var(--border); color: var(--fg-bright); }
.btn--danger { color: var(--err); border-color: color-mix(in oklab, var(--err) 45%, transparent); background: color-mix(in oklab, var(--err) 8%, var(--surface)); }
.btn--danger:hover { background: color-mix(in oklab, var(--err) 16%, var(--surface)); border-color: var(--err); color: var(--err); }
.btn--sm { height: 24px; padding: 0 9px; font-size: var(--t-xs); }
.btn--icon { width: 30px; padding: 0; justify-content: center; }
.btn--icon.btn--sm { width: 24px; }

/* ============================================================
   INPUTS
   ============================================================ */
.input {
  width: 100%;
  height: 32px;
  padding: 0 11px;
  font-family: var(--font-mono);
  font-size: var(--t-sm);
  color: var(--fg-bright);
  background: var(--bg-sunken);
  border: 1px solid var(--border-strong);
  border-radius: var(--rad-2);
  outline: none;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.input::placeholder { color: var(--fg-faint); }
.input:focus { border-color: var(--accent-dim); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 16%, transparent); }

/* ============================================================
   CARD / PANEL
   ============================================================ */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--rad-3);
}
.panel-head {
  display: flex; align-items: center; gap: var(--sp-3);
  height: 38px; padding: 0 var(--sp-4);
  border-bottom: 1px solid var(--border);
}

/* ============================================================
   STATUS BAR  (Helix-style)
   ============================================================ */
.statusbar {
  display: flex;
  align-items: stretch;
  height: 26px;
  font-size: var(--t-xs);
  background: var(--bg-sunken);
  border-top: 1px solid var(--border);
  user-select: none;
  overflow: hidden;
  white-space: nowrap;
}
.statusbar .mode-block {
  display: flex; align-items: center;
  padding: 0 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-fg);
  background: var(--mode-normal);
}
.mode-NOR .mode-block { background: var(--mode-normal); }
.mode-INS .mode-block { background: var(--mode-insert); }
.mode-SEL .mode-block { background: var(--mode-select); }
.statusbar .sb-seg {
  display: flex; align-items: center; gap: 7px;
  padding: 0 12px;
  color: var(--fg-muted);
  border-right: 1px solid var(--border);
  flex: none;
  white-space: nowrap;
}
.statusbar .sb-seg .sb-key { color: var(--fg-faint); }
.statusbar .sb-spacer { flex: 1; }
.statusbar .sb-rec { color: var(--err); }
.statusbar .sb-rec .rec-dot {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--err); margin-right: 6px;
  animation: recpulse 1.4s steps(1) infinite;
}
@keyframes recpulse { 0%,50% { opacity: 1; } 51%,100% { opacity: 0.25; } }

/* ============================================================
   TOAST
   ============================================================ */
.toast {
  display: flex; align-items: flex-start; gap: 10px;
  width: 340px; padding: 11px 13px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-left-width: 3px;
  border-radius: var(--rad-3);
  box-shadow: var(--shadow-2);
  font-size: var(--t-sm);
}
.toast--info    { border-left-color: var(--info); }
.toast--success { border-left-color: var(--ok); }
.toast--warning { border-left-color: var(--warn); }
.toast--error   { border-left-color: var(--err); }
.toast .toast-ico { flex: none; margin-top: 1px; }
.toast .toast-title { color: var(--fg-bright); font-weight: 600; margin-bottom: 2px; }
.toast .toast-body { color: var(--fg-muted); line-height: 1.45; }

/* ============================================================
   TREE VIEW
   ============================================================ */
.tree { font-size: var(--t-sm); }
.tree-row {
  display: flex; align-items: center; gap: 7px;
  height: 26px; padding: 0 8px;
  border-radius: var(--rad-2);
  color: var(--fg-muted);
  cursor: pointer;
  position: relative;
}
.tree-row:hover { background: var(--surface-2); color: var(--fg-bright); }
.tree-row.is-active { background: var(--surface-3); color: var(--fg-bright); }
.tree-row.is-active::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px;
  width: 2px; border-radius: 2px; background: var(--accent);
}
.tree-row .twisty { width: 12px; color: var(--fg-faint); flex: none; transition: transform var(--dur-fast); }
.tree-row .twisty.open { transform: rotate(90deg); }
.tree-children { margin-left: 14px; border-left: 1px solid var(--border); padding-left: 4px; }

/* ============================================================
   CITATION CHIP
   ============================================================ */
.cite {
  display: inline-flex; align-items: center; gap: 4px;
  height: 17px; padding: 0 6px;
  font-size: var(--t-2xs); font-weight: 600;
  color: var(--accent);
  background: color-mix(in oklab, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 35%, transparent);
  border-radius: var(--rad-2);
  cursor: pointer; vertical-align: baseline;
  transition: background var(--dur-fast);
}
.cite:hover { background: color-mix(in oklab, var(--accent) 22%, transparent); }

/* ============================================================
   SCOPE BREADCRUMB
   ============================================================ */
.scope {
  display: inline-flex; align-items: center;
  height: 26px; padding: 2px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-strong);
  border-radius: var(--rad-2);
  font-size: var(--t-xs);
}
.scope-seg {
  display: inline-flex; align-items: center; gap: 6px;
  height: 22px; padding: 0 9px;
  border-radius: var(--rad-1);
  color: var(--fg-muted); cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.scope-seg:hover { background: var(--surface-2); color: var(--fg-bright); }
.scope-seg.is-active { color: var(--fg-bright); background: var(--surface-3); }
.scope-seg .seg-ico { color: var(--fg-faint); }
.scope-seg.is-active .seg-ico { color: var(--accent); }
.scope-sep { color: var(--fg-faint); padding: 0 1px; }

/* ============================================================
   SKELETON
   ============================================================ */
.sk { background: var(--surface-2); border-radius: var(--rad-2); position: relative; overflow: hidden; }
.sk::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in oklab, var(--fg-faint) 18%, transparent), transparent);
  transform: translateX(-100%);
  animation: shimmer 1.4s var(--ease) infinite;
}
@keyframes shimmer { 100% { transform: translateX(100%); } }

/* ============================================================
   UTILITIES
   ============================================================ */
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.gap-1 { gap: var(--sp-1); } .gap-2 { gap: var(--sp-2); } .gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); } .gap-6 { gap: var(--sp-6); }
.grow { flex: 1; }
.muted { color: var(--fg-muted); }
.faint { color: var(--fg-faint); }
.bright { color: var(--fg-bright); }
.accent { color: var(--accent); }
.center { align-items: center; }
.between { justify-content: space-between; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---- Tweak hooks (reading typeface / density / hints) ---- */
[data-read="sans"] { --font-read: var(--font-sans); }
[data-read="sans"] .cs-title, [data-read="sans"] .onb-h, [data-read="sans"] .dash-title, [data-read="sans"] .cs-item dt { letter-spacing: -0.005em; }
[data-density="compact"] .cs-list { gap: 11px; }
[data-density="compact"] .cs-sections { gap: 26px; }
[data-density="compact"] .cs-doc { padding-top: 28px; }
[data-density="compact"] .chat-scroll { gap: 11px; }
[data-density="compact"] .cs-item { grid-template-columns: 168px 1fr; }
[data-hints="off"] .kbd, [data-hints="off"] .nav-k, [data-hints="off"] .compose-hint { display: none !important; }