/* ==========================================================================
   CheckArch — Apple Glass Design System
   Source: Aigets Apple Glass UI Kit
   Layers: L0 (background) → L1 (panels) → L2 (cards) → L3 (controls) → L4 (overlays)
   ========================================================================== */

/* --- Tokens: Light (default) --- */
:root {
  /* L0 background */
  --glass-l0-bg: radial-gradient(55% 85% at 5% 0%, rgba(102,170,255,0.26), transparent 62%),
    radial-gradient(48% 78% at 98% 6%, rgba(126,228,215,0.2), transparent 65%),
    radial-gradient(45% 65% at 60% 100%, rgba(255,182,137,0.16), transparent 68%),
    linear-gradient(158deg, #f3f8ff 0%, #edf3ff 44%, #f7fbff 100%);
  --glass-l0-bg-flat: #f3f8ff;

  /* Layer backgrounds */
  --glass-l1-bg: rgba(255,255,255,0.74);
  --glass-l2-bg: rgba(255,255,255,0.56);
  --glass-l3-bg: rgba(255,255,255,0.42);
  --glass-l4-bg: rgba(255,255,255,0.88);

  /* Blur */
  --glass-l1-blur: 26px;
  --glass-l2-blur: 18px;
  --glass-l3-blur: 12px;
  --glass-l4-blur: 36px;

  /* Borders */
  --glass-l1-border: rgba(255,255,255,0.62);
  --glass-l2-border: rgba(255,255,255,0.48);
  --glass-l3-border: rgba(255,255,255,0.36);
  --glass-l4-border: rgba(255,255,255,0.68);

  /* Text */
  --glass-text-primary: #101a2d;
  --glass-text-muted: #5b6a86;

  /* Accent */
  --glass-accent: #3d86ff;
  --glass-accent-alt: #72c5ff;
  --glass-accent-rgb: 61, 134, 255;
  --glass-accent-a30: rgba(61,134,255,0.30);
  --glass-focus-ring: rgba(61,134,255,0.32);
  --glass-success: #44c488;
  --glass-warning: #f3b24e;
  --glass-error: #ef6973;
  --glass-info: #3d86ff;

  /* Shadows */
  --glass-shadow-panel: inset 0 1px 0 rgba(255,255,255,0.55), 0 22px 44px rgba(28,58,110,0.14);
  --glass-shadow-card: inset 0 1px 0 rgba(255,255,255,0.45), 0 12px 28px rgba(33,58,103,0.12);
  --glass-shadow-control: inset 0 1px 0 rgba(255,255,255,0.4), 0 6px 16px rgba(38,58,98,0.1);
  --glass-l3-bg-hover: color-mix(in srgb, var(--glass-l3-bg) 92%, white 8%);

  /* Motion */
  --motion-fast: 180ms;
  --motion-normal: 240ms;
  --motion-slow: 320ms;

  /* Radii */
  --radius-panel: 20px;
  --radius-card: 16px;
  --radius-input: 14px;
  --radius-dialog: 24px;

  /* Mobile-specific */
  --mobile-edge: 12px;
  --mobile-bar-gap: 6px;
  --mobile-scroll-extra: 25px;
  --tabbar-h: 64px;
  --composer-h: 138px;

  /* Sidebar */
  --sidebar-width: 296px;
  --sidebar-collapsed-width: 60px;
  --assistant-width: 360px;

  /* Backward-compat aliases for account.css */
  --glass-text: var(--glass-text-primary);
  --glass-text-secondary: var(--glass-text-muted);
  --glass-border: var(--glass-l2-border);
  --glass-border-strong: var(--glass-l1-border);
}

/* --- Tokens: Dark --- */
:root[data-theme='dark'] {
  --glass-l0-bg: radial-gradient(58% 92% at 6% -4%, rgba(88,150,255,0.28), transparent 62%),
    radial-gradient(48% 82% at 102% 8%, rgba(46,168,164,0.22), transparent 64%),
    radial-gradient(52% 68% at 64% 108%, rgba(255,170,117,0.16), transparent 70%),
    linear-gradient(155deg, #0c1424 0%, #102038 44%, #142a45 100%);
  --glass-l0-bg-flat: #0c1424;

  --glass-l1-bg: rgba(13,22,39,0.72);
  --glass-l2-bg: rgba(16,28,48,0.58);
  --glass-l3-bg: rgba(19,32,54,0.48);
  --glass-l4-bg: rgba(13,22,39,0.90);

  --glass-l1-border: rgba(214,231,255,0.20);
  --glass-l2-border: rgba(200,224,255,0.17);
  --glass-l3-border: rgba(195,219,255,0.14);
  --glass-l4-border: rgba(225,237,255,0.26);

  --glass-text-primary: #ecf2ff;
  --glass-text-muted: #abc0e6;
  --glass-accent: #6ba9ff;
  --glass-accent-alt: #63d7ff;
  --glass-accent-rgb: 107, 169, 255;
  --glass-accent-a30: rgba(107,169,255,0.30);
  --glass-focus-ring: rgba(107,169,255,0.42);
  --glass-success: #5bd7a2;
  --glass-warning: #ffc86c;
  --glass-error: #ff7e86;
  --glass-info: #6ba9ff;

  --glass-shadow-panel: inset 0 1px 0 rgba(233,244,255,0.20), 0 24px 50px rgba(2,7,16,0.56);
  --glass-shadow-card: inset 0 1px 0 rgba(229,241,255,0.16), 0 14px 30px rgba(2,7,16,0.48);
  --glass-shadow-control: inset 0 1px 0 rgba(225,238,255,0.12), 0 8px 18px rgba(2,8,18,0.42);
  --glass-l3-bg-hover: color-mix(in srgb, var(--glass-l3-bg) 86%, white 14%);
}

/* --- Theme Presets --- */
:root[data-theme-preset='light-soft'] {
  --glass-l0-bg: radial-gradient(55% 85% at 5% 0%, rgba(102,170,255,0.26), transparent 62%),
    radial-gradient(48% 78% at 98% 6%, rgba(126,228,215,0.20), transparent 65%),
    radial-gradient(45% 65% at 60% 100%, rgba(255,182,137,0.16), transparent 68%),
    linear-gradient(158deg, #f3f8ff 0%, #edf3ff 44%, #f7fbff 100%);
  --glass-l0-bg-flat: #f3f8ff;
  --glass-l1-bg: rgba(255,255,255,0.74);
  --glass-l2-bg: rgba(255,255,255,0.56);
  --glass-l3-bg: rgba(255,255,255,0.42);
  --glass-l4-bg: rgba(255,255,255,0.88);
  --glass-l1-border: rgba(255,255,255,0.62);
  --glass-l2-border: rgba(255,255,255,0.48);
  --glass-l3-border: rgba(255,255,255,0.36);
  --glass-l4-border: rgba(255,255,255,0.68);
  --glass-text-primary: #101a2d;
  --glass-text-muted: #5b6a86;
  --glass-accent: #3d86ff;
  --glass-accent-alt: #72c5ff;
  --glass-accent-rgb: 61, 134, 255;
  --glass-accent-a30: rgba(61,134,255,0.30);
  --glass-focus-ring: rgba(61,134,255,0.32);
}

:root[data-theme-preset='light-contrast'] {
  --glass-l0-bg: radial-gradient(50% 78% at 4% 2%, rgba(62,118,255,0.20), transparent 60%),
    radial-gradient(46% 72% at 97% 10%, rgba(55,178,255,0.16), transparent 62%),
    radial-gradient(42% 60% at 58% 102%, rgba(255,182,120,0.12), transparent 68%),
    linear-gradient(160deg, #ffffff 0%, #eef3fa 42%, #dfe9f7 100%);
  --glass-l0-bg-flat: #edf3fb;
  --glass-l1-bg: rgba(255,255,255,0.84);
  --glass-l2-bg: rgba(252,254,255,0.72);
  --glass-l3-bg: rgba(244,249,255,0.82);
  --glass-l4-bg: rgba(255,255,255,0.94);
  --glass-l1-border: rgba(188,206,233,0.58);
  --glass-l2-border: rgba(177,196,225,0.46);
  --glass-l3-border: rgba(168,188,218,0.38);
  --glass-l4-border: rgba(190,210,235,0.66);
  --glass-text-primary: #0e1728;
  --glass-text-muted: #4d5f7a;
  --glass-accent: #2468ff;
  --glass-accent-alt: #59b9ff;
  --glass-accent-rgb: 36, 104, 255;
  --glass-accent-a30: rgba(36,104,255,0.30);
  --glass-focus-ring: rgba(36,104,255,0.26);
  --glass-shadow-panel: inset 0 1px 0 rgba(255,255,255,0.78), 0 22px 42px rgba(23,40,72,0.11);
  --glass-shadow-card: inset 0 1px 0 rgba(255,255,255,0.66), 0 12px 24px rgba(28,45,75,0.10);
  --glass-shadow-control: inset 0 1px 0 rgba(255,255,255,0.56), 0 6px 14px rgba(31,47,77,0.10);
}

:root[data-theme-preset='light-strict'] {
  --glass-l0-bg: radial-gradient(52% 84% at 8% 0%, rgba(116,154,188,0.18), transparent 60%),
    radial-gradient(44% 66% at 96% 8%, rgba(160,188,204,0.16), transparent 60%),
    radial-gradient(40% 54% at 60% 100%, rgba(186,176,148,0.14), transparent 68%),
    linear-gradient(160deg, #f4f3ef 0%, #edeff2 44%, #f7f6f1 100%);
  --glass-l0-bg-flat: #f1f1ed;
  --glass-l1-bg: rgba(250,249,245,0.82);
  --glass-l2-bg: rgba(245,244,239,0.72);
  --glass-l3-bg: rgba(239,237,232,0.82);
  --glass-l4-bg: rgba(251,250,246,0.94);
  --glass-l1-border: rgba(202,205,209,0.58);
  --glass-l2-border: rgba(194,198,202,0.48);
  --glass-l3-border: rgba(184,188,192,0.38);
  --glass-l4-border: rgba(206,210,214,0.66);
  --glass-text-primary: #172131;
  --glass-text-muted: #5c6977;
  --glass-accent: #2b6e7b;
  --glass-accent-alt: #7ba9b7;
  --glass-accent-rgb: 43, 110, 123;
  --glass-accent-a30: rgba(43,110,123,0.30);
  --glass-focus-ring: rgba(43,110,123,0.24);
  --glass-shadow-panel: inset 0 1px 0 rgba(255,255,255,0.60), 0 18px 34px rgba(40,44,51,0.10);
  --glass-shadow-card: inset 0 1px 0 rgba(255,255,255,0.48), 0 10px 20px rgba(42,46,53,0.08);
  --glass-shadow-control: inset 0 1px 0 rgba(255,255,255,0.40), 0 5px 12px rgba(46,50,58,0.08);
}

:root[data-theme-preset='dark-soft'] {
  --glass-l0-bg: radial-gradient(58% 92% at 6% -4%, rgba(88,150,255,0.28), transparent 62%),
    radial-gradient(48% 82% at 102% 8%, rgba(46,168,164,0.22), transparent 64%),
    radial-gradient(52% 68% at 64% 108%, rgba(255,170,117,0.16), transparent 70%),
    linear-gradient(155deg, #0c1424 0%, #102038 44%, #142a45 100%);
  --glass-l0-bg-flat: #0c1424;
  --glass-l1-bg: rgba(13,22,39,0.72);
  --glass-l2-bg: rgba(16,28,48,0.58);
  --glass-l3-bg: rgba(19,32,54,0.48);
  --glass-l4-bg: rgba(13,22,39,0.90);
  --glass-l1-border: rgba(214,231,255,0.20);
  --glass-l2-border: rgba(200,224,255,0.17);
  --glass-l3-border: rgba(195,219,255,0.14);
  --glass-l4-border: rgba(225,237,255,0.26);
  --glass-text-primary: #ecf2ff;
  --glass-text-muted: #abc0e6;
  --glass-accent: #6ba9ff;
  --glass-accent-alt: #63d7ff;
  --glass-accent-rgb: 107, 169, 255;
  --glass-accent-a30: rgba(107,169,255,0.30);
  --glass-focus-ring: rgba(107,169,255,0.42);
}

:root[data-theme-preset='dark-contrast'] {
  --glass-l0-bg: radial-gradient(50% 78% at 8% -2%, rgba(88,138,255,0.24), transparent 60%),
    radial-gradient(42% 70% at 102% 10%, rgba(54,188,255,0.18), transparent 60%),
    linear-gradient(158deg, #070b12 0%, #0c1320 42%, #121d2d 100%);
  --glass-l0-bg-flat: #080c13;
  --glass-l1-bg: rgba(8,12,18,0.82);
  --glass-l2-bg: rgba(10,17,27,0.76);
  --glass-l3-bg: rgba(14,22,35,0.76);
  --glass-l4-bg: rgba(9,13,20,0.94);
  --glass-l1-border: rgba(225,237,255,0.24);
  --glass-l2-border: rgba(210,226,248,0.22);
  --glass-l3-border: rgba(198,216,240,0.18);
  --glass-l4-border: rgba(233,242,255,0.32);
  --glass-text-primary: #f3f8ff;
  --glass-text-muted: #b4c6e0;
  --glass-accent: #7ab0ff;
  --glass-accent-alt: #55d7ff;
  --glass-accent-rgb: 122, 176, 255;
  --glass-accent-a30: rgba(122,176,255,0.30);
  --glass-focus-ring: rgba(122,176,255,0.34);
  --glass-shadow-panel: inset 0 1px 0 rgba(237,245,255,0.18), 0 24px 60px rgba(0,0,0,0.62);
  --glass-shadow-card: inset 0 1px 0 rgba(232,243,255,0.16), 0 14px 34px rgba(0,0,0,0.52);
  --glass-shadow-control: inset 0 1px 0 rgba(232,243,255,0.14), 0 8px 20px rgba(0,0,0,0.44);
}

:root[data-theme-preset='dark-strict'] {
  --glass-l0-bg: radial-gradient(46% 70% at 8% 0%, rgba(61,151,189,0.24), transparent 58%),
    radial-gradient(40% 62% at 98% 6%, rgba(83,176,167,0.18), transparent 56%),
    linear-gradient(158deg, #08121a 0%, #0d1a26 46%, #122536 100%);
  --glass-l0-bg-flat: #0b1620;
  --glass-l1-bg: rgba(8,20,28,0.80);
  --glass-l2-bg: rgba(10,26,37,0.72);
  --glass-l3-bg: rgba(13,31,43,0.70);
  --glass-l4-bg: rgba(8,20,28,0.94);
  --glass-l1-border: rgba(176,213,226,0.24);
  --glass-l2-border: rgba(163,200,214,0.20);
  --glass-l3-border: rgba(151,190,205,0.18);
  --glass-l4-border: rgba(194,224,235,0.30);
  --glass-text-primary: #ecf5ff;
  --glass-text-muted: #9eb9c8;
  --glass-accent: #4bb4c8;
  --glass-accent-alt: #8ad7d0;
  --glass-accent-rgb: 75, 180, 200;
  --glass-accent-a30: rgba(75,180,200,0.30);
  --glass-focus-ring: rgba(75,180,200,0.32);
  --glass-shadow-panel: inset 0 1px 0 rgba(228,245,252,0.14), 0 22px 52px rgba(2,8,12,0.56);
  --glass-shadow-card: inset 0 1px 0 rgba(228,245,252,0.10), 0 12px 28px rgba(2,8,12,0.46);
  --glass-shadow-control: inset 0 1px 0 rgba(228,245,252,0.08), 0 7px 18px rgba(2,8,12,0.38);
}

/* --- Base reset for glass pages --- */
.glass-page,
.glass-page body {
  margin: 0;
  min-height: 100%;
}

.glass-page body,
body.glass-body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  height: 100dvh;
  font-family: 'Manrope', 'Segoe UI Variable Text', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', Roboto, sans-serif;
  font-size: 13px;
  color: var(--glass-text-primary);
  background: var(--glass-l0-bg);
  letter-spacing: 0.01em;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  font-synthesis-weight: none;
  font-synthesis-style: none;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Global glass input/textarea/select --- */
.glass-input,
input.glass-input,
textarea.glass-input,
select.glass-input {
  padding: 9px 12px;
  border-radius: var(--radius-input);
  border: 1px solid var(--glass-l3-border);
  background: var(--glass-l3-bg);
  color: var(--glass-text-primary);
  font: inherit;
  font-size: 13px;
  line-height: 1.5;
  transition: border-color var(--motion-fast) ease, box-shadow var(--motion-fast) ease;
}
.glass-input:focus {
  outline: none;
  border-color: var(--glass-accent);
  box-shadow: 0 0 0 3px var(--glass-focus-ring);
}
.glass-input::placeholder {
  color: var(--glass-text-muted);
}

/* --- Global glass button --- */
.glass-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--glass-l2-border);
  background: var(--glass-l3-bg);
  color: var(--glass-text-primary);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--motion-fast) ease;
  white-space: nowrap;
  user-select: none;
}
.glass-btn:hover {
  background: var(--glass-l2-bg);
  border-color: var(--glass-l1-border);
}
.glass-btn:active { transform: scale(0.97); }
.glass-btn:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--glass-accent) 56%, var(--glass-l3-border));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--glass-accent) 18%, transparent);
}
.glass-btn i, .glass-btn svg { font-size: 14px; width: 14px; height: 14px; }

.glass-btn-primary {
  background: var(--glass-accent);
  color: #fff;
  border-color: var(--glass-accent);
}
.glass-btn-primary:hover {
  filter: brightness(1.1);
}

/* Decorative blur orbs (L0) */
body.glass-body::before,
body.glass-body::after {
  content: '';
  position: fixed;
  border-radius: 999px;
  pointer-events: none;
  z-index: -1;
  filter: blur(40px);
  opacity: 0.65;
}

body.glass-body::before {
  width: 360px;
  height: 360px;
  top: -80px;
  left: -90px;
  background: radial-gradient(circle, color-mix(in srgb, var(--glass-accent) 34%, #a8f5e3) 0%, transparent 70%);
}

body.glass-body::after {
  width: 420px;
  height: 420px;
  right: -120px;
  bottom: -130px;
  background: radial-gradient(circle, color-mix(in srgb, #ffba7f 40%, var(--glass-accent)) 0%, transparent 72%);
}

/* --- Layer utility classes --- */
.glass-layer-1,
.glass-layer-2,
.glass-layer-3,
.glass-layer-4 {
  border: 1px solid;
  transition:
    border-color var(--motion-fast) ease,
    background var(--motion-fast) ease,
    box-shadow var(--motion-normal) ease,
    transform var(--motion-fast) ease;
}

.glass-layer-1:hover,
.glass-layer-2:hover,
.glass-layer-3:hover {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.22),
    0 20px 40px color-mix(in srgb, var(--glass-accent) 8%, transparent);
}

.glass-layer-1 {
  background: var(--glass-l1-bg);
  border-color: var(--glass-l1-border);
  backdrop-filter: blur(var(--glass-l1-blur));
  -webkit-backdrop-filter: blur(var(--glass-l1-blur));
  border-radius: var(--radius-panel);
  box-shadow: var(--glass-shadow-panel);
}

.glass-layer-2 {
  background: var(--glass-l2-bg);
  border-color: var(--glass-l2-border);
  backdrop-filter: blur(var(--glass-l2-blur));
  -webkit-backdrop-filter: blur(var(--glass-l2-blur));
  border-radius: var(--radius-card);
  box-shadow: var(--glass-shadow-card);
}

.glass-layer-3 {
  background: var(--glass-l3-bg);
  border-color: var(--glass-l3-border);
  backdrop-filter: blur(var(--glass-l3-blur));
  -webkit-backdrop-filter: blur(var(--glass-l3-blur));
  border-radius: var(--radius-input);
  box-shadow: var(--glass-shadow-control);
}

.glass-layer-4 {
  background: var(--glass-l4-bg);
  border-color: var(--glass-l4-border);
  backdrop-filter: blur(var(--glass-l4-blur));
  -webkit-backdrop-filter: blur(var(--glass-l4-blur));
  border-radius: var(--radius-dialog);
  box-shadow: var(--glass-shadow-panel);
}

/* --- Desktop Shell Layout --- */

/* Topbar: 3-zone grid aligned to shell columns */
.app-topbar {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--assistant-width);
  gap: 20px;
  align-items: center;
  padding: 0 18px;
  height: 46px;
  position: relative;
  z-index: 50;
  flex: 0 0 auto;
  max-width: 1720px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

/* Topbar zones */
.topbar-left {
  display: flex;
  align-items: center;
  min-width: 0;
}
.topbar-center {
  display: flex;
  align-items: center;
  min-width: 0;
}
.topbar-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

/* View bars inside topbar center — only active one is visible */
.topbar-view-bar {
  display: none;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
}
.topbar-view-bar.is-active {
  display: flex;
}
.topbar-view-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--glass-text-primary);
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-view-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

/* Sidebar-collapsed: topbar grid adapts */
body.sidebar-collapsed .app-topbar {
  grid-template-columns: var(--sidebar-collapsed-width) 1fr var(--assistant-width);
}
/* Hide brand name when collapsed — only logo fits in 60px */
body.sidebar-collapsed .topbar-left {
  overflow: hidden;
}
body.sidebar-collapsed .topbar-brand-name {
  display: none;
}

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(500px, 1fr) var(--assistant-width);
  gap: 20px;
  padding: 18px;
  width: 100%;
  max-width: 1720px;
  margin: 0 auto;
  box-sizing: border-box;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed-width) minmax(500px, 1fr) var(--assistant-width);
  gap: 20px;
}

.shell.sidebar-hidden {
  grid-template-columns: 0px minmax(500px, 1fr) var(--assistant-width);
}

/* Sidebar */
.sidebar {
  padding: 18px;
  min-width: 0;
  height: 100%;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  transition: width var(--motion-normal) ease, padding var(--motion-normal) ease;
}

.sidebar-collapsed .sidebar .sidebar-label {
  display: none;
}

.sidebar-session {
  padding: 10px;
  font-size: 11px;
  color: var(--glass-text-muted);
  line-height: 1.5;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.sidebar-nav-item {
  width: 100%;
  border: 1px solid transparent;
  padding: 8px 10px;
  text-align: left;
  color: var(--glass-text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  border-radius: var(--radius-input);
  cursor: pointer;
  background: transparent;
  font-size: 13px;
  font-weight: 500;
  transition:
    border-color var(--motion-fast) ease,
    box-shadow var(--motion-fast) ease,
    background var(--motion-fast) ease,
    transform var(--motion-fast) ease;
}

.sidebar-nav-item:hover {
  background: var(--glass-l2-bg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 10px 20px color-mix(in srgb, var(--glass-accent) 10%, transparent);
}

.sidebar-nav-item.is-active {
  background: color-mix(in srgb, var(--glass-accent) 10%, transparent);
  border-color: color-mix(in srgb, var(--glass-accent) 30%, var(--glass-l2-border));
  font-weight: 600;
}

.sidebar-nav-item i {
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 14px;
  color: var(--glass-text-muted);
  flex: 0 0 auto;
}

.sidebar-nav-item.is-active i {
  color: var(--glass-accent);
}

.sidebar-footer {
  margin-top: auto;
  padding: 8px 0;
  font-size: 11px;
  color: var(--glass-text-muted);
}

.sidebar-footer a {
  color: var(--glass-text-muted);
  text-decoration: none;
}

.sidebar-footer a:hover {
  color: var(--glass-accent);
}

.sidebar-toggle {
  width: 100%;
  padding: 8px;
  border-radius: var(--radius-input);
  font-size: 12px;
  color: var(--glass-text-muted);
}

/* Workflow (center column) */
.workflow {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  min-width: 0;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* Workflow sub-components defined in account.css */

/* Assistant (right column) */
.assistant {
  display: flex;
  flex-direction: column;
  padding: 18px;
  min-width: 0;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

/* Assistant sub-components defined in account.css */

/* --- Mobile Shell Layout --- */
.shell-mobile {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 10px;
  padding: calc(var(--mobile-edge) + env(safe-area-inset-top)) var(--mobile-edge) var(--mobile-edge);
  height: 100dvh;
  overflow: hidden;
}

.mobile-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  position: relative;
  z-index: 5;
}

.mobile-subbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 12px;
  position: relative;
  z-index: 4;
}

.mobile-subbar h2 {
  margin: 0;
  font-size: 1.02rem;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-scroll {
  min-height: 0;
  overflow: auto;
  padding-bottom: calc(
    var(--mobile-edge) + env(safe-area-inset-bottom) +
    var(--tabbar-h) + var(--mobile-bar-gap) +
    var(--composer-h) + var(--mobile-scroll-extra)
  );
}

.mobile-composer {
  position: fixed;
  left: var(--mobile-edge);
  right: var(--mobile-edge);
  bottom: calc(var(--mobile-edge) + env(safe-area-inset-bottom) + var(--tabbar-h) + var(--mobile-bar-gap));
  border-radius: 22px;
  z-index: 31;
  padding: 12px;
  display: none; /* shown on chat views */
}

.mobile-composer.is-visible {
  display: block;
}

.tabbar {
  position: fixed;
  left: var(--mobile-edge);
  right: var(--mobile-edge);
  bottom: calc(var(--mobile-edge) + env(safe-area-inset-bottom));
  padding: 10px;
  border-radius: 22px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  z-index: 30;
}

.tabbar-item {
  min-height: 42px;
  border: 1px solid var(--glass-l3-border);
  background: color-mix(in srgb, var(--glass-l3-bg) 86%, transparent);
  border-radius: 16px;
  color: var(--glass-text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 10px;
  cursor: pointer;
}

.tabbar-item.is-active {
  border-color: color-mix(in srgb, var(--glass-accent) 48%, var(--glass-l3-border));
  box-shadow: var(--glass-shadow-control), 0 0 0 3px color-mix(in srgb, var(--glass-accent) 18%, transparent);
  color: color-mix(in srgb, var(--glass-accent) 75%, var(--glass-text-primary));
}

/* --- Shared Components --- */

.glass-btn-accent {
  border-color: color-mix(in srgb, var(--glass-accent) 54%, var(--glass-l3-border));
  background: color-mix(in srgb, var(--glass-accent) 16%, var(--glass-l3-bg));
}

.glass-btn-pill {
  border-radius: 999px;
  min-height: 36px;
  width: 38px;
  padding: 0;
  display: grid;
  place-items: center;
}

/* Cards */
.glass-card {
  padding: 14px;
  border: 1px solid var(--glass-l2-border);
  border-radius: 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

/* Messages */
.glass-message {
  padding: 10px 12px;
  border: 1px solid var(--glass-l2-border);
  border-radius: 13px;
  background: color-mix(in srgb, var(--glass-l2-bg) 84%, transparent);
}

.glass-message.own {
  border-color: color-mix(in srgb, var(--glass-accent) 48%, var(--glass-l2-border));
}

/* Composer shared */
.glass-composer-form {
  display: grid;
  gap: 10px;
}

.glass-composer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.glass-composer-textarea {
  resize: none;
  min-height: 44px;
  max-height: 160px;
  width: 100%;
  padding: 10px 11px;
  border: 1px solid var(--glass-l3-border);
  border-radius: var(--radius-input);
  background: color-mix(in srgb, var(--glass-l3-bg) 90%, transparent);
  color: var(--glass-text-primary);
  font: inherit;
}

.glass-composer-textarea:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--glass-accent) 56%, var(--glass-l3-border));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--glass-accent) 18%, transparent);
}

.glass-composer-actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

/* Text utilities */
.text-muted { color: var(--glass-text-muted); }
.text-accent { color: var(--glass-accent); }
.text-sm { font-size: 12px; }
.text-xs { font-size: 11px; }

/* --- Notification center popover --- */
.notification-popover {
  position: absolute;
  top: 100%;
  right: 0;
  width: 320px;
  max-height: 400px;
  overflow-y: auto;
  padding: 16px;
  z-index: 100;
  display: none;
}

.notification-popover.is-open {
  display: block;
}

/* --- Responsive --- */
@media (max-width: 1440px) {
  .app-topbar {
    grid-template-columns: 250px 1fr 320px;
    gap: 16px;
  }
  body.sidebar-collapsed .app-topbar {
    grid-template-columns: var(--sidebar-collapsed-width) 1fr 320px;
  }
  .shell {
    grid-template-columns: 250px minmax(440px, 1fr) 320px;
    gap: 16px;
  }
}

@media (max-width: 1220px) {
  .shell {
    grid-template-columns: 1fr;
    max-width: 980px;
    height: auto;
  }

  body.glass-body {
    overflow: auto;
  }

  .sidebar,
  .assistant {
    height: auto;
  }
}

/* --- Reduced motion / transparency --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .glass-layer-1,
  .glass-layer-2,
  .glass-layer-3,
  .glass-layer-4 {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}