/* Shared public UI palette and controls. Page files own their layout and state. */
:root {
  color-scheme: light;
  --canvas: #fbfbfa; --bg: var(--canvas); --sidebar: #f3f3f0;
  --surface: #fff; --strong: #e9e9e3; --soft: #f0f0eb; --line: #dedfd7;
  --text: #282a26; --muted: #62655d; --faint: #71756b;
  --accent: #292d27; --accent-ink: #fff; --ink: var(--accent-ink);
  --link: #376a5c; --focus: #628274; --focus-ring: #62827430;
  --danger: #a6423b; --danger-soft: #faeeec; --warning: #806017; --warning-soft: #faf3e3;
  --success: #38664c; --success-soft: #edf4ed;
  --shadow: 0 6px 24px rgb(28 30 24 / 4%); --scrim: rgb(24 27 22 / 24%);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 15px; line-height: 1.6;
}
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --canvas: #191b19; --sidebar: #151715; --surface: #212420; --strong: #353a33; --soft: #282c26; --line: #3b4138;
    --text: #eef0e9; --muted: #b5bcae; --faint: #a0a998;
    --accent: #e1e7d9; --accent-ink: #22271f; --link: #a7ccbb; --focus: #a3c4b0; --focus-ring: #a3c4b033;
    --danger: #f1aaa3; --danger-soft: #392624; --warning: #dfc889; --warning-soft: #332f22;
    --success: #adcfb2; --success-soft: #27372b; --shadow: 0 6px 24px rgb(0 0 0 / 12%); --scrim: rgb(0 0 0 / 40%);
  }
}
body { background: var(--canvas); }
button, input, textarea, select { font: inherit; }
button, a, input, textarea, select, summary { -webkit-tap-highlight-color: transparent; }
button, a { touch-action: manipulation; }
button:not(:disabled), summary { cursor: pointer; }
button:disabled { cursor: default; }
input:not([type=checkbox]):not([type=radio]), select, textarea { font-size: 14px; }
input::placeholder, textarea::placeholder { color: var(--faint); opacity: 1; }
input, textarea, select { accent-color: var(--accent); }
:is(button, a, input, textarea, select, summary):focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
:is(input, textarea, select):focus { border-color: var(--focus); box-shadow: 0 0 0 2px var(--focus-ring); }
:is(input, textarea, select):focus-visible { outline: none; }
:is(.composer, .conversation-search):focus-within { border-color: var(--focus); box-shadow: 0 0 0 2px var(--focus-ring); }
:is(.composer, .conversation-search) input:focus, .composer textarea:focus { outline: none; box-shadow: none; }
a { text-underline-offset: 3px; }
[aria-disabled=true] { cursor: default; }
h1, h2, h3 { text-wrap: balance; font-weight: 600; }
p, dd, strong, pre { overflow-wrap: anywhere; }
.product-nav { background: var(--canvas); border-color: var(--line); backdrop-filter: none; }
.nav-item.active { color: var(--text); background: var(--soft); }
.nav-account { border-color: transparent; background: transparent; }
.nav-account:hover { background: var(--soft); }
.nav-account-copy strong { font-size: 14px; }
.nav-account-copy small { font-size: 12px; }
.pair-story:before { display: none; }
.pair-card { padding: 32px; border-radius: 12px; box-shadow: none; }
.pair-copy h1 { font-size: clamp(30px, 4vw, 52px); line-height: 1.2; letter-spacing: -.035em; }
.pair-copy p { font-size: 16px; line-height: 1.75; }
.pair-note i, .auth-meta i { box-shadow: none; background: var(--link); }
.eyebrow, .pair-copy .eyebrow { color: var(--muted); letter-spacing: .07em; font-weight: 600; }
.primary-button, .primary, .download-primary, .security-submit { border-radius: 8px; font-weight: 600; box-shadow: none; }
.download-entry, .recommended, .download-recommended { border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
.download-entry small, .auth-meta, .pair-note { font-size: 13px; }
.hero { background: transparent; }
.hero h1 { font-size: clamp(30px, 4.8vw, 52px); line-height: 1.2; }
.card, .release-card, .release-history-card, .personal-panel { border-radius: 12px; box-shadow: none; }
.notice, .note { border-left: 0; border-radius: 8px; background: var(--soft); font-size: 14px; }
.utility-header h1 { font-size: clamp(26px, 3vw, 36px); font-weight: 600; }
.utility-header p { max-width: 70ch; line-height: 1.7; }
.utility-shell { max-width: 1120px; }
.security-section { box-shadow: none; }
.security-field, .security-form input, .security-form select, .model-card p, .incident-row, .personal-toolbar input, .personal-toolbar select { font-size: 14px; }
.account-link, .session-logout, .personal-delete, .personal-more, .account-action, .incident-toolbar button, .personal-toolbar button, .model-assignment > summary { min-height: 36px; font-size: 14px; }
.personal-toolbar { gap: 10px; grid-template-columns: minmax(0, 1fr) 104px auto; }
.personal-toolbar.project-toolbar { grid-template-columns: minmax(0, 1fr) auto; }
.personal-toolbar button[type=submit] { width: auto; min-width: 56px; padding-inline: 12px; }
.personal-toolbar input, .personal-toolbar select, .incident-toolbar input, .incident-toolbar select { min-height: 40px; min-width: 0; }
.personal-panel-header { flex-wrap: wrap; }
.personal-panel-count { margin-right: auto; }
.personal-panel-header .personal-delete { color: var(--danger); background: transparent; border-color: transparent; }
.personal-panel-header .personal-delete:hover:not(:disabled) { background: var(--danger-soft); border-color: var(--danger); }
.personal-tabs button[aria-selected=true]:after { height: 2px; }
.personal-empty, .empty-ledger, .incident-empty { padding: 32px 20px; line-height: 1.7; color: var(--muted); }
.personal-list .personal-empty, .personal-empty, .empty-ledger, .incident-empty { font-size: 14px; }
.personal-empty strong { color: var(--text); font-weight: 600; }
.personal-empty { align-content: center; }
.personal-empty p { max-width: 44ch; margin: 8px auto 0; }
.incident-row { min-height: 56px; }
.incident-detail pre { white-space: pre-wrap; font-size: 13px; }
.model-assignment-menu, .conversation-menu { box-shadow: var(--shadow); }
.model-assignment > summary { height: auto; padding-block: 8px; }
.new-chat { background: var(--surface); border-color: var(--line); color: var(--text); border-radius: 8px; }
.new-chat:hover { background: var(--soft); border-color: var(--line); }
.composer { box-shadow: var(--shadow); }
.send-button { background: var(--accent); color: var(--accent-ink); }
.approval-card { background: var(--warning-soft); border-color: var(--warning); border-radius: 12px; }
.toast { display: flex; align-items: center; gap: 16px; max-width: min(640px, calc(100vw - 32px)); padding: 12px 16px; border: 1px solid var(--danger); border-radius: 10px; background: var(--danger-soft); color: var(--danger); box-shadow: var(--shadow); font-size: 14px; }
.toast span { min-width: 0; max-height: 30vh; overflow: auto; overflow-wrap: anywhere; }
.toast button { flex: 0 0 auto; min-height: 36px; padding: 0 10px; border: 1px solid currentColor; border-radius: 6px; background: transparent; color: inherit; }
.toast.success { background: var(--success-soft); border-color: var(--success); color: var(--success); }
.download-retry { min-height: 40px; margin-top: 12px; padding: 8px 16px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--text); }
@media (prefers-reduced-motion: no-preference) {
  button, a { transition: background-color 160ms, border-color 160ms, color 160ms; }
  .utility-header, .pair-card { animation: surface-enter 180ms ease-out both; }
  @keyframes surface-enter { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media (max-width: 760px) {
  .primary-nav { justify-content: flex-start; overflow-x: auto; scrollbar-width: thin; }
  .nav-item { flex: 0 0 auto; min-height: 40px; }
  .pair-card { padding: 24px; }
  input:not([type=checkbox]):not([type=radio]), textarea, select { font-size: 16px; }
  .personal-toolbar { grid-template-columns: minmax(0, 1fr) auto; }
  .personal-toolbar input { grid-column: 1 / -1; }
  .session-actions, .section-title { flex-wrap: wrap; }
  .toast { bottom: max(16px, env(safe-area-inset-bottom)); }
}
@media (forced-colors: active) {
  :root { --focus: Highlight; --line: CanvasText; }
  button, a, input, textarea, select { forced-color-adjust: auto; }
  :is(input, textarea, select):focus-visible { outline: 2px solid Highlight; }
}