/* ============================================================
   GN Tracing Design System v2
   Tokens (dark default + light) and shared components for all
   extension surfaces (popup, settings, history, drive-auth).
   The replay player also consumes the token variables below;
   never remove or rename a token, only add new ones.

   Shape lock:  8px interactive / 12px cards / 16px panels / pill for toggles
   Color lock:  one accent (electric blue) + record red for capture state
   Motion:      transform/opacity only, 120-200ms, reduced-motion safe
   ============================================================ */

/* ============================================================
   1. NO-FLASH GUARD
   Must stay the first rule in every page's cascade.
   theme-init.js sets data-theme on <html> before first paint.
   ============================================================ */
html:not([data-theme]) {
  visibility: hidden;
}
html[data-theme] {
  visibility: visible;
}

/* ============================================================
   2. DARK MODE (default)
   ============================================================ */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  /* Surfaces */
  --bg-base: #090e1a;
  --bg-elevated: #101728;
  --bg-surface: rgba(16, 23, 40, 0.92);
  --bg-surface-solid: #101728;
  --bg-card: rgba(148, 168, 205, 0.1);
  --bg-card-hover: rgba(148, 168, 205, 0.16);
  --bg-input: rgba(9, 14, 26, 0.72);
  --bg-input-hover: rgba(16, 23, 40, 0.96);
  --bg-toast: rgba(16, 23, 40, 0.98);
  --bg-overlay: rgba(3, 7, 16, 0.72);
  --bg-success-soft: rgba(34, 197, 94, 0.16);
  --bg-error-soft: rgba(248, 113, 113, 0.14);
  --bg-warning-soft: rgba(245, 158, 11, 0.14);
  --bg-accent-soft: rgba(79, 140, 255, 0.16);
  --bg-danger-soft: rgba(217, 45, 32, 0.16);

  /* Text */
  --text-primary: #f4f7fd;
  --text-secondary: #c2cde2;
  --text-muted: #9aa8c2;
  --text-dim: #74829c;
  --text-inverse: #090e1a;

  /* Accent (Electric Blue - brand) */
  --accent: #4f8cff;
  --accent-hover: #3d7bf0;
  --accent-strong: #2563eb;
  --accent-muted: rgba(96, 165, 250, 0.72);
  --accent-subtle: rgba(96, 165, 250, 0.38);
  --accent-ghost: rgba(96, 165, 250, 0.16);
  --accent-contrast: #ffffff;

  /* Record (capture state red, from brand icon) */
  --record: #f85149;
  --record-strong: #d92d20;
  --record-strong-hover: #b42318;
  --record-soft: rgba(248, 81, 73, 0.16);

  /* Semantic */
  --danger: #f87171;
  --danger-hover: #ef4444;
  --danger-soft: #fca5a5;
  --danger-bg: rgba(217, 45, 32, 0.14);
  --danger-border: rgba(248, 113, 113, 0.32);
  --success: #34d399;
  --success-hover: #10b981;
  --success-soft: #86efac;
  --success-bg: rgba(34, 197, 94, 0.12);
  --success-border: rgba(52, 211, 153, 0.36);
  --warning: #fbbf24;
  --warning-soft: #fde68a;
  --info: #38bdf8;
  --info-soft: #93c5fd;

  /* Borders */
  --border-subtle: rgba(148, 168, 205, 0.14);
  --border-default: rgba(148, 168, 205, 0.24);
  --border-strong: rgba(148, 168, 205, 0.36);
  --border-hover: rgba(96, 165, 250, 0.48);
  --border-focus: rgba(96, 165, 250, 0.78);
  --border-danger: rgba(248, 113, 113, 0.36);
  --border-success: rgba(52, 211, 153, 0.48);
  --border-input: rgba(148, 168, 205, 0.3);
  --border-input-hover: rgba(148, 168, 205, 0.48);

  /* Shadows (layered, tinted to surface hue) */
  --shadow-sm: 0 1px 2px rgba(2, 6, 18, 0.36), 0 2px 8px rgba(2, 6, 18, 0.24);
  --shadow-md: 0 2px 6px rgba(2, 6, 18, 0.32), 0 10px 24px rgba(2, 6, 18, 0.3);
  --shadow-lg: 0 4px 12px rgba(2, 6, 18, 0.34), 0 18px 48px rgba(2, 6, 18, 0.38);
  --shadow-xl: 0 8px 20px rgba(2, 6, 18, 0.4), 0 24px 64px rgba(2, 6, 18, 0.48);
  --shadow-accent: 0 2px 8px rgba(79, 140, 255, 0.34), 0 8px 22px rgba(79, 140, 255, 0.22);
  --shadow-record: 0 2px 8px rgba(217, 45, 32, 0.34), 0 8px 22px rgba(217, 45, 32, 0.22);

  /* Scrollbar */
  --scrollbar-track: transparent;
  --scrollbar-thumb: rgba(148, 168, 205, 0.28);
  --scrollbar-thumb-hover: rgba(148, 168, 205, 0.44);

  /* Glass */
  --glass-bg: rgba(16, 23, 40, 0.86);
  --glass-border: rgba(148, 168, 205, 0.17);
  --glass-blur: blur(14px);

  /* Gradients */
  --gradient-hero:
    radial-gradient(circle at 10% -10%, rgba(79, 140, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 92% 8%, rgba(56, 189, 248, 0.06), transparent 26rem),
    linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-base) 100%);
  --gradient-accent: linear-gradient(90deg, rgba(96, 165, 250, 0.3), rgba(59, 130, 246, 0.16));
  --gradient-success: linear-gradient(90deg, rgba(52, 211, 153, 0.3), rgba(16, 185, 129, 0.16));
  --gradient-danger: linear-gradient(90deg, rgba(248, 113, 113, 0.3), rgba(217, 45, 32, 0.16));
}

/* ============================================================
   3. LIGHT MODE
   ============================================================ */
[data-theme="light"] {
  color-scheme: light;

  /* Surfaces: cool gray page, pure white cards, clear separation */
  --bg-base: #e6ebf2;
  --bg-elevated: #ffffff;
  --bg-surface: rgba(255, 255, 255, 0.96);
  --bg-surface-solid: #eef2f7;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f4f9;
  --bg-input: #ffffff;
  --bg-input-hover: #f8fafc;
  --bg-toast: rgba(255, 255, 255, 0.99);
  --bg-overlay: rgba(15, 23, 42, 0.48);
  --bg-success-soft: rgba(5, 150, 105, 0.12);
  --bg-error-soft: rgba(220, 38, 38, 0.1);
  --bg-warning-soft: rgba(180, 83, 9, 0.12);
  --bg-accent-soft: rgba(29, 78, 216, 0.1);
  --bg-danger-soft: rgba(217, 45, 32, 0.1);

  /* Text: ink hierarchy with AA-friendly secondary/muted */
  --text-primary: #0a0f1a;
  --text-secondary: #1e293b;
  --text-muted: #475569;
  --text-dim: #64748b;
  --text-inverse: #f8fafc;

  /* Accent: solid electric blue for primary CTAs */
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-strong: #1e3a8a;
  --accent-muted: rgba(29, 78, 216, 0.82);
  --accent-subtle: rgba(29, 78, 216, 0.32);
  --accent-ghost: rgba(29, 78, 216, 0.14);
  --accent-contrast: #ffffff;

  /* Record */
  --record: #e11d48;
  --record-strong: #be123c;
  --record-strong-hover: #9f1239;
  --record-soft: rgba(225, 29, 72, 0.12);

  /* Semantic */
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-soft: #b91c1c;
  --danger-bg: rgba(220, 38, 38, 0.1);
  --danger-border: rgba(220, 38, 38, 0.4);
  --success: #047857;
  --success-hover: #065f46;
  --success-soft: #047857;
  --success-bg: rgba(4, 120, 87, 0.1);
  --success-border: rgba(4, 120, 87, 0.4);
  --warning: #b45309;
  --warning-soft: #92400e;
  --info: #0369a1;
  --info-soft: #0c4a6e;

  /* Borders: crisp slate hairlines */
  --border-subtle: rgba(15, 23, 42, 0.1);
  --border-default: rgba(15, 23, 42, 0.16);
  --border-strong: rgba(15, 23, 42, 0.28);
  --border-hover: rgba(29, 78, 216, 0.48);
  --border-focus: rgba(29, 78, 216, 0.72);
  --border-danger: rgba(220, 38, 38, 0.4);
  --border-success: rgba(4, 120, 87, 0.42);
  --border-input: rgba(15, 23, 42, 0.22);
  --border-input-hover: rgba(15, 23, 42, 0.36);

  /* Shadows: lift white cards off cool page */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 2px 4px rgba(15, 23, 42, 0.06), 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 4px 10px rgba(15, 23, 42, 0.08), 0 16px 40px rgba(15, 23, 42, 0.12);
  --shadow-xl: 0 8px 18px rgba(15, 23, 42, 0.1), 0 24px 56px rgba(15, 23, 42, 0.14);
  --shadow-accent: 0 1px 2px rgba(29, 78, 216, 0.24), 0 6px 16px rgba(29, 78, 216, 0.28);
  --shadow-record: 0 1px 2px rgba(190, 18, 60, 0.24), 0 6px 16px rgba(190, 18, 60, 0.26);

  /* Scrollbar */
  --scrollbar-track: transparent;
  --scrollbar-thumb: rgba(15, 23, 42, 0.22);
  --scrollbar-thumb-hover: rgba(15, 23, 42, 0.36);

  /* Glass: nearly solid for product chrome */
  --glass-bg: rgba(255, 255, 255, 0.94);
  --glass-border: rgba(15, 23, 42, 0.12);
  --glass-blur: blur(12px);

  /* Gradients: quiet page wash, no pastel haze */
  --gradient-hero: linear-gradient(180deg, #eef2f7 0%, var(--bg-base) 100%);
  --gradient-accent: linear-gradient(90deg, rgba(29, 78, 216, 0.18), rgba(29, 78, 216, 0.08));
  --gradient-success: linear-gradient(90deg, rgba(4, 120, 87, 0.16), rgba(4, 120, 87, 0.08));
  --gradient-danger: linear-gradient(90deg, rgba(220, 38, 38, 0.16), rgba(220, 38, 38, 0.08));
}

/* ============================================================
   4. SHARED TOKENS (theme-independent)
   ============================================================ */
:root {
  /* Typography */
  --font-ui:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial,
    sans-serif;
  --font-mono:
    ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;

  /* Type scale */
  --fs-xs: 11px;
  --fs-sm: 12px;
  --fs-base: 13px;
  --fs-md: 14px;
  --fs-lg: 16px;
  --fs-xl: 20px;
  --fs-2xl: 24px;

  /* Shape lock */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;

  /* Motion */
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 120ms;
  --dur-med: 200ms;
}

/* ============================================================
   5. BASE
   ============================================================ */

/* Keep padding/border inside width:100% so form controls and
   shell columns do not bleed past card/panel edges. */
*,
*::before,
*::after {
  box-sizing: border-box;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   6. SHARED COMPONENTS
   ============================================================ */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 36px;
  padding: 8px 14px;
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  user-select: none;
  transition:
    background var(--dur-fast) var(--ease-standard),
    border-color var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard),
    transform 80ms var(--ease-standard);
}

.btn svg,
.btn .ph {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn .ph {
  font-size: 16px;
  line-height: 1;
  width: auto;
  height: auto;
}

.btn:hover:not(:disabled) {
  background: var(--bg-input-hover);
  border-color: var(--border-input-hover);
}

.btn:active:not(:disabled) {
  transform: scale(0.98) translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:focus-visible,
.icon-btn:focus-visible,
.session-icon-button:focus-visible,
.history-icon-button:focus-visible {
  outline: 2px solid var(--accent-muted);
  outline-offset: 2px;
}

/* Primary (start recording, save, connect) */
.btn-start {
  background: var(--accent);
  border-color: transparent;
  color: var(--accent-contrast);
  box-shadow: var(--shadow-accent);
}

.btn-start:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: transparent;
  box-shadow: var(--shadow-accent);
  color: var(--accent-contrast);
}

/* Done (record state) — a completed action uses the success accent.
   Red is reserved for discard/destructive actions (.btn-danger). */
.btn-success {
  background: var(--success);
  border-color: transparent;
  color: var(--accent-contrast);
  box-shadow: var(--shadow-accent);
}

.btn-success:hover:not(:disabled) {
  background: var(--success-hover);
  border-color: transparent;
  box-shadow: var(--shadow-accent);
  color: var(--accent-contrast);
}

.btn-success.is-loading,
.btn.is-loading {
  opacity: 0.85;
  cursor: progress;
}

/* Secondary */
.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-strong);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

/* Danger (soft) */
.btn-danger {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger-soft);
}

.btn-danger:hover:not(:disabled) {
  background: var(--bg-danger-soft);
  border-color: var(--danger);
}

.btn-small {
  min-height: 28px;
  padding: 4px 10px;
  font-size: var(--fs-xs);
}

.btn-small svg {
  width: 13px;
  height: 13px;
}

/* Loading spinner inside buttons (JS injects <span class="btn-spinner">) */
.btn-spinner {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  border: 2px solid color-mix(in srgb, currentColor 35%, transparent);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: gn-spin 0.7s linear infinite;
}

@keyframes gn-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- Icon buttons ---------- */
.icon-btn {
  position: relative;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-standard),
    border-color var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard),
    transform 80ms var(--ease-standard);
}

/* Expand hit area without growing visual chrome */
.icon-btn::after {
  content: "";
  position: absolute;
  inset: -4px;
}

.icon-btn:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.icon-btn:active:not(:disabled) {
  transform: scale(0.94);
}

.icon-btn svg,
.icon-btn .ph {
  width: 15px;
  height: 15px;
  display: block;
}

.icon-btn .ph {
  font-size: 15px;
  line-height: 1;
  width: auto;
  height: auto;
}

/* Theme toggle icon (Phosphor class swaps desktop/sun/moon). */
#theme-toggle-icon,
.theme-toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  line-height: 1;
}

/* ---------- Section titles ---------- */
.section-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.section-title-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

i.section-title-icon.ph {
  width: auto;
  height: auto;
  font-size: 13px;
  line-height: 1;
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* ---------- Form controls ---------- */
input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
  display: block;
  width: 100%;
  max-width: 100%;
  min-height: 36px;
  padding: 8px 11px;
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: 1.4;
  outline: none;
  transition:
    border-color var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard),
    background var(--dur-fast) var(--ease-standard);
}

textarea {
  resize: vertical;
  min-height: 72px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}

input[type="text"]:hover,
input[type="number"]:hover,
input[type="password"]:hover,
select:hover,
textarea:hover {
  border-color: var(--border-input-hover);
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ghost);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-dim);
}

input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

input[type="checkbox"],
input[type="radio"] {
  accent-color: var(--accent);
}

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-muted) 50%),
    linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position:
    calc(100% - 16px) 50%,
    calc(100% - 11px) 50%;
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
  padding-right: 30px;
}

/* ---------- Feedback banners (className is wiped by JS; style by id) ---------- */
#error-msg,
.success-msg {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  line-height: 1.45;
  border: 1px solid var(--danger-border);
  background: var(--bg-error-soft);
  color: var(--danger-soft);
}

.success-msg {
  border-color: var(--border-success);
  background: var(--bg-success-soft);
  color: var(--success-soft);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  background: var(--bg-toast);
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  animation: gn-toast-in var(--dur-med) var(--ease-standard);
}

@keyframes gn-toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toast-success {
  border-left-color: var(--success);
}

.toast-info {
  border-left-color: var(--accent);
}

.toast-error {
  border-left-color: var(--danger);
}

.toast-icon {
  display: inline-flex;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}

.toast-icon svg {
  width: 16px;
  height: 16px;
}

.toast-success .toast-icon {
  color: var(--success);
}

.toast-info .toast-icon {
  color: var(--accent);
}

.toast-error .toast-icon {
  color: var(--danger);
}

.toast-message {
  flex: 1;
  min-width: 0;
  font-size: var(--fs-sm);
  line-height: 1.4;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.toast-close-btn {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard);
}

.toast-close-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.toast-close-btn svg,
.toast-close-btn .ph {
  width: 12px;
  height: 12px;
}

.toast-close-btn .ph {
  font-size: 12px;
  line-height: 1;
  width: auto;
  height: auto;
}

/* ---------- Upload history items (shared renderer: upload-history-ui.ts) ---------- */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "title actions"
    "meta actions";
  column-gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  transition:
    border-color var(--dur-fast) var(--ease-standard),
    background var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard);
}

.history-item:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.history-item-title {
  grid-area: title;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-item-meta {
  grid-area: meta;
  margin-top: 3px;
  font-size: var(--fs-xs);
  line-height: 1.5;
  color: var(--text-muted);
}

.history-item-actions {
  grid-area: actions;
  display: flex;
  align-items: center;
  gap: 4px;
}

.history-icon-button,
.session-icon-button {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-standard),
    border-color var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard),
    transform 80ms var(--ease-standard);
}

.history-icon-button:hover,
.session-icon-button:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.history-icon-button:active,
.session-icon-button:active {
  transform: scale(0.92);
}

.history-icon-button svg,
.session-icon-button svg,
.history-icon-button .ph,
.session-icon-button .ph {
  width: 14px;
  height: 14px;
  display: block;
}

.history-icon-button .ph,
.session-icon-button .ph {
  font-size: 14px;
  line-height: 1;
  width: auto;
  height: auto;
}

/* Destructive action affordance */
.history-icon-button[data-action="delete-history"]:hover,
.session-icon-button[data-action="delete-session"]:hover {
  background: var(--bg-danger-soft);
  border-color: var(--danger-border);
  color: var(--danger);
}

.history-empty,
.session-empty {
  padding: 14px 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-surface-solid);
  font-size: var(--fs-sm);
  line-height: 1.5;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
}

/* Fresh-upload flash (JS adds .is-upload-success for 1s) */
.history-item.is-upload-success {
  animation: gn-upload-flash 1s var(--ease-standard);
  border-color: var(--border-success);
}

@keyframes gn-upload-flash {
  0% {
    background: var(--bg-success-soft);
    box-shadow: 0 0 0 3px var(--success-border);
  }
  100% {
    background: var(--bg-card);
    box-shadow: none;
  }
}

/* ---------- Scrollbar ---------- */
.gn-scroll,
body {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.gn-scroll::-webkit-scrollbar,
body::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.gn-scroll::-webkit-scrollbar-track,
body::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.gn-scroll::-webkit-scrollbar-thumb,
body::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  background: var(--scrollbar-thumb);
  background-clip: padding-box;
}

.gn-scroll::-webkit-scrollbar-thumb:hover,
body::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
  background-clip: padding-box;
}

/* ============================================================
   7. SHELL (topbar / page / footer)
   Used by settings, history, drive-auth; popup overrides locally.

   Content width lock: topbar-inner and page-inner share the same
   max-width + horizontal padding so chrome and body align.
   ============================================================ */

:root {
  --gn-shell-max: 860px;
  --gn-shell-pad-x: 24px;
  --gn-shell-pad-x-sm: 16px;
}

.gn-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  /* Horizontal pad lives on the OUTER shell, same as .gn-page, so the
     max-width inners line up on the same content column. */
  padding: 0 var(--gn-shell-pad-x);
  border-bottom: 1px solid var(--border-default);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  box-sizing: border-box;
}

/* Same max-width + no extra horizontal pad as .gn-page-inner */
.gn-topbar-inner {
  width: 100%;
  max-width: var(--gn-shell-max);
  height: 56px;
  margin: 0 auto;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-sizing: border-box;
}

.gn-topbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  color: var(--text-primary);
  text-decoration: none;
  cursor: default;
  user-select: none;
}

.gn-topbar-logo {
  width: 22px;
  height: 22px;
  display: block;
  flex-shrink: 0;
}

/* Shared type metrics so app name + page title share one baseline. */
.gn-topbar-name,
.gn-topbar-page-title {
  margin: 0;
  padding: 0;
  border: 0;
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: 22px;
  height: 22px;
  white-space: nowrap;
  display: block;
}

.gn-topbar-name {
  font-weight: 700;
  letter-spacing: -0.01em;
  color: inherit;
}

/* Separate hairline so border height is not tied to text metrics. */
.gn-topbar-divider {
  width: 1px;
  height: 12px;
  margin: 0 2px;
  flex-shrink: 0;
  align-self: center;
  background: var(--border-strong);
}

.gn-topbar-page-title {
  font-weight: 500;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.gn-topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Language toggle reuses .icon-btn chrome; only type label differs. */
.icon-btn.gn-lang-toggle {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
}

/* ---------- Page nav menu (settings / history / connect) ---------- */
.gn-nav {
  position: relative;
}

.gn-nav-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 180px;
  padding: 6px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
}

.gn-nav-menu[hidden] {
  display: none !important;
}

.gn-nav-menu button[role="menuitem"] {
  display: flex;
  align-items: center;
  width: 100%;
  margin: 0;
  padding: 8px 10px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard);
}

.gn-nav-menu button[role="menuitem"]:hover:not(:disabled) {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.gn-nav-menu button[role="menuitem"]:focus-visible {
  outline: 2px solid var(--accent-muted);
  outline-offset: 0;
}

.gn-nav-menu button[role="menuitem"].is-current,
.gn-nav-menu button[role="menuitem"]:disabled {
  color: var(--text-muted);
  cursor: default;
}

.gn-nav-menu button[role="menuitem"].is-current {
  background: var(--bg-accent-soft);
  color: var(--accent);
}

.gn-page {
  display: flex;
  flex: 1;
  flex-direction: column;
  width: 100%;
  padding: 20px var(--gn-shell-pad-x) 28px;
  box-sizing: border-box;
}

.gn-page-inner {
  width: 100%;
  max-width: var(--gn-shell-max);
  margin: 0 auto;
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 20px;
  box-sizing: border-box;
}

/* Shared page heading row (settings / history / similar) */
.gn-page-hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.gn-page-hero-copy {
  min-width: 0;
  flex: 1;
}

.gn-page-title {
  margin: 0;
  color: var(--text-primary);
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.gn-page-lead {
  margin: 4px 0 0;
  max-width: 52ch;
  color: var(--text-secondary);
  font-size: var(--fs-base);
  line-height: 1.5;
}

.gn-page-hero-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.gn-footer {
  margin-top: auto;
  padding: 16px 0 0;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-dim);
  font-size: var(--fs-xs);
}

.gn-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.gn-footer-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

button.gn-footer-link,
a.gn-footer-link,
.gn-footer-link {
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-standard);
}

.gn-footer-link:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- Feedback button + popover (topbar) ---------- */
.gn-feedback {
  position: relative;
  flex-shrink: 0;
}

/* Icon-only trigger (matches .icon-btn sizing on full pages). */
.gn-feedback-btn.icon-btn {
  gap: 0;
}

.gn-feedback-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  display: block;
}

/* Text labels are intentionally not shown on the trigger. */
.gn-feedback-btn-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.gn-feedback-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 8px;
  /* Size against the viewport, not the icon wrap (wrap is only ~32px wide). */
  width: min(320px, calc(100vw - 24px));
  max-width: calc(100vw - 24px);
  padding: 12px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  box-sizing: border-box;
}

.gn-feedback-popover.hidden {
  display: none !important;
}

.gn-feedback-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
}

.gn-feedback-message {
  width: 100%;
  min-height: 88px;
  resize: vertical;
  box-sizing: border-box;
  padding: 8px 10px;
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font: inherit;
  font-size: var(--fs-sm);
  line-height: 1.4;
}

.gn-feedback-message:focus {
  outline: 2px solid var(--border-focus);
  outline-offset: 1px;
  border-color: var(--border-hover);
}

.gn-feedback-message:disabled {
  opacity: 0.7;
}

.gn-feedback-hint {
  margin: 0;
  font-size: 11px;
  line-height: 1.45;
  color: var(--text-dim);
}

.gn-feedback-status {
  margin: 0;
  font-size: 11px;
  line-height: 1.4;
  color: var(--text-secondary);
}

.gn-feedback-status.hidden {
  display: none !important;
}

.gn-feedback-status.is-error {
  color: var(--danger);
}

.gn-feedback-status.is-success {
  color: var(--success);
}

.gn-feedback-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.gn-feedback-actions .btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

@media (max-width: 560px) {
  :root {
    --gn-shell-pad-x: var(--gn-shell-pad-x-sm);
  }

  .gn-topbar {
    padding: 0 var(--gn-shell-pad-x);
  }

  .gn-page {
    padding: 16px var(--gn-shell-pad-x) 24px;
  }

  .gn-page-hero {
    flex-direction: column;
    align-items: stretch;
  }

  .gn-page-hero-actions {
    justify-content: flex-end;
  }

  .gn-footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============================================================
   8. REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}