/*
 * TexLeaf-Z server web design tokens and shared components (07 §2, W-01).
 *
 * Theme selection:
 * - default: follows prefers-color-scheme (the small pages rely on this only);
 * - the main console may pin a theme with :root[data-theme="light"|"dark"]
 *   (app.js applyTheme/toggleTheme).
 * No images, fonts or external resources: the small pages run under
 * default-src 'none' / img-src 'none'.
 */

:root {
  color-scheme: light;
  --tlz-bg: #f5f4ef;
  --tlz-panel: #ffffff;
  --tlz-line: #dcd8cf;
  --tlz-fg: #3a4446;
  --tlz-ink: #1d2426;
  --tlz-muted: #6f7a7b;
  --tlz-accent: #1f8a82;
  --tlz-accent-fg: #ffffff;
  --tlz-gold: #b8901f;
  --tlz-warn: #c46a2b;
  --tlz-ok: #3d8b4a;
  --tlz-info: #2f6fb3;
  --tlz-err: #b8443a;
  --tlz-shadow: 0 14px 40px rgba(29, 36, 38, .08);
  --tlz-font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --tlz-serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "Source Han Serif", Georgia, "Times New Roman", serif;
  --tlz-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --tlz-radius: 12px;
  --tlz-radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --tlz-bg: #1a1d1e;
    --tlz-panel: #22272a;
    --tlz-line: #333a3d;
    --tlz-fg: #d3d9d8;
    --tlz-ink: #eef2f1;
    --tlz-muted: #8e9a9b;
    --tlz-accent: #4fb8ad;
    --tlz-accent-fg: #1a1d1e;
    --tlz-gold: #d9b55a;
    --tlz-warn: #e39a4f;
    --tlz-ok: #6cc08a;
    --tlz-info: #6aa8e0;
    --tlz-err: #e07a6b;
    --tlz-shadow: 0 14px 40px rgba(0, 0, 0, .30);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --tlz-bg: #1a1d1e;
  --tlz-panel: #22272a;
  --tlz-line: #333a3d;
  --tlz-fg: #d3d9d8;
  --tlz-ink: #eef2f1;
  --tlz-muted: #8e9a9b;
  --tlz-accent: #4fb8ad;
  --tlz-accent-fg: #1a1d1e;
  --tlz-gold: #d9b55a;
  --tlz-warn: #e39a4f;
  --tlz-ok: #6cc08a;
  --tlz-info: #6aa8e0;
  --tlz-err: #e07a6b;
  --tlz-shadow: 0 14px 40px rgba(0, 0, 0, .30);
}

/* Derived tokens (follow whichever palette is active). */
:root {
  --tlz-subtle: color-mix(in srgb, var(--tlz-fg) 4%, var(--tlz-panel));
  --tlz-field: color-mix(in srgb, var(--tlz-fg) 3%, var(--tlz-panel));
  --tlz-sel: color-mix(in srgb, var(--tlz-accent) 14%, var(--tlz-bg));
  --tlz-accent-hover: color-mix(in srgb, var(--tlz-accent) 86%, var(--tlz-ink));
}

/* ---- Small-page base (opt-in via body.tlz-page) ---- */
body.tlz-page {
  margin: 0;
  min-height: 100vh;
  background: var(--tlz-bg);
  color: var(--tlz-fg);
  font-family: var(--tlz-font);
  font-size: 15px;
  line-height: 1.65;
  font-synthesis: none;
}
.tlz-page *, .tlz-page *::before, .tlz-page *::after { box-sizing: border-box; }
.tlz-page [hidden] { display: none !important; }
.tlz-page a { color: var(--tlz-accent); text-underline-offset: 4px; }
.tlz-page a:focus-visible, .tlz-page summary:focus-visible { outline: 3px solid var(--tlz-accent); outline-offset: 3px; border-radius: 4px; }

.tlz-stage { min-height: 100vh; min-height: 100dvh; display: grid; align-items: center; padding: 36px 20px; }

/* ---- Brand mark: pure CSS "T" square (no images allowed by CSP) ---- */
.tlz-brand {
  width: 44px;
  height: 44px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 11px;
  background: var(--tlz-accent);
  color: var(--tlz-accent-fg);
  font: 700 26px/1 var(--tlz-serif);
  letter-spacing: 0;
}
.tlz-brand > span, .tlz-brand:empty::after { align-self: flex-end; margin: 0 0 9px 1px; color: var(--tlz-gold); font-size: 14px; }
.tlz-brand:empty::before { content: "T"; }
.tlz-brand:empty::after { content: "z"; }
:root[data-theme="dark"] .tlz-brand > span, :root[data-theme="dark"] .tlz-brand:empty::after { color: var(--tlz-accent-fg); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tlz-brand > span, :root:not([data-theme="light"]) .tlz-brand:empty::after { color: var(--tlz-accent-fg); }
}

.tlz-eyebrow { margin: 0 0 6px; color: var(--tlz-accent); font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.tlz-title { margin: 0; color: var(--tlz-ink); font-family: var(--tlz-serif); font-weight: 700; font-size: clamp(22px, 4.4vw, 28px); line-height: 1.35; letter-spacing: -.01em; }
.tlz-subtitle { margin: 0; color: var(--tlz-ink); font-family: var(--tlz-serif); font-weight: 700; font-size: 17px; line-height: 1.45; }
.tlz-lead { margin: 12px 0 0; color: var(--tlz-muted); font-size: 14px; line-height: 1.85; }
.tlz-note { margin: 16px 0 0; color: var(--tlz-muted); font-size: 12px; line-height: 1.85; }
.tlz-muted { color: var(--tlz-muted); }

/* ---- Cards ---- */
.tlz-card {
  border: 1px solid var(--tlz-line);
  border-radius: var(--tlz-radius);
  background: var(--tlz-panel);
  box-shadow: var(--tlz-shadow);
  padding: 24px;
}
.tlz-card-small { width: min(100%, 520px); margin: auto; padding: 34px; }
.tlz-card-head { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.tlz-card-head .tlz-eyebrow { margin: 0; }

/* Collapsible card rows (<details class="tlz-card tlz-fold">). */
details.tlz-fold { padding: 0; }
.tlz-fold > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  color: var(--tlz-ink);
  font-weight: 650;
}
.tlz-fold > summary::-webkit-details-marker { display: none; }
.tlz-fold > summary::before { content: "›"; width: 1em; color: var(--tlz-muted); font-size: 1.3rem; line-height: 1; transition: transform .15s ease; }
.tlz-fold[open] > summary::before { transform: rotate(90deg); }
.tlz-fold[open] > summary { border-bottom: 1px solid var(--tlz-line); }
.tlz-fold > summary > .tlz-pill { margin-left: auto; }
.tlz-fold > :not(summary) { margin-left: 22px; margin-right: 22px; }
.tlz-fold > :last-child:not(summary) { margin-bottom: 20px; }

/* ---- Facts list ---- */
.tlz-facts { display: grid; grid-template-columns: minmax(110px, 1fr) minmax(0, 2fr); gap: 10px 20px; margin: 16px 0; font-size: 13px; line-height: 1.65; }
.tlz-facts dt { color: var(--tlz-muted); }
.tlz-facts dd { margin: 0; color: var(--tlz-ink); overflow-wrap: anywhere; }
/* Single-fact block (label above value), used where markup is not a dl. */
.tlz-fact { padding: 14px 16px; border: 1px solid var(--tlz-line); border-radius: var(--tlz-radius-sm); background: var(--tlz-subtle); font-size: 13px; line-height: 1.7; overflow-wrap: anywhere; }
.tlz-fact-label { display: block; margin-bottom: 2px; color: var(--tlz-muted); font-size: 11px; }
.tlz-fact strong { color: var(--tlz-ink); font-weight: 600; }
.tlz-fact p { margin: 4px 0 0; color: var(--tlz-muted); }

/* ---- Status box: ready (neutral) / busy (warn) / success (ok) / error (err) ---- */
.tlz-status {
  --tlz-status: var(--tlz-accent);
  padding: 13px 16px;
  border: 1px solid color-mix(in srgb, var(--tlz-status) 30%, transparent);
  border-left: 3px solid var(--tlz-status);
  border-radius: var(--tlz-radius-sm);
  background: color-mix(in srgb, var(--tlz-status) 9%, var(--tlz-panel));
  color: var(--tlz-ink);
  font-size: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.tlz-status strong { display: block; color: var(--tlz-status); font-weight: 650; }
.tlz-status p { margin: 3px 0 0; color: var(--tlz-fg); }
.tlz-status[aria-busy="true"], .tlz-status[data-state="busy"], .tlz-status[data-state="pending"] { --tlz-status: var(--tlz-warn); }
.tlz-status[data-state="success"] { --tlz-status: var(--tlz-ok); }
.tlz-status[data-state="error"], .tlz-status[data-error="true"] { --tlz-status: var(--tlz-err); }
.tlz-status:empty { display: none; }

/* ---- Buttons ---- */
.tlz-btn, .tlz-page button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 38px;
  padding: 8px 16px;
  border: 1px solid var(--tlz-line);
  border-radius: var(--tlz-radius-sm);
  background: var(--tlz-panel);
  color: var(--tlz-ink);
  font: 600 13px/1.4 var(--tlz-font);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.tlz-btn:hover:enabled, .tlz-page button:hover:enabled { background: var(--tlz-subtle); }
.tlz-btn:focus-visible, .tlz-page button:focus-visible { outline: 3px solid var(--tlz-accent); outline-offset: 3px; }
.tlz-btn:disabled, .tlz-page button:disabled { opacity: .5; cursor: default; }
.tlz-btn-primary, .tlz-page button.tlz-btn-primary { border-color: var(--tlz-accent); background: var(--tlz-accent); color: var(--tlz-accent-fg); }
.tlz-btn-primary:hover:enabled, .tlz-page button.tlz-btn-primary:hover:enabled { background: var(--tlz-accent-hover); }
.tlz-btn-ghost, .tlz-page button.tlz-btn-ghost { border-color: transparent; background: transparent; color: var(--tlz-muted); }
.tlz-btn-danger, .tlz-page button.tlz-btn-danger { border-color: var(--tlz-err); color: var(--tlz-err); }
.tlz-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 20px; }

/* ---- Pills ---- */
.tlz-pill {
  --tlz-pill: var(--tlz-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--tlz-pill) 15%, transparent);
  color: var(--tlz-pill);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  white-space: nowrap;
}
.tlz-pill:empty { display: none; }
.tlz-pill-gold { --tlz-pill: var(--tlz-gold); }
.tlz-pill-warn { --tlz-pill: var(--tlz-warn); }
.tlz-pill-ok { --tlz-pill: var(--tlz-ok); }
.tlz-pill-info { --tlz-pill: var(--tlz-info); }
.tlz-pill-err { --tlz-pill: var(--tlz-err); }
.tlz-pill-muted { --tlz-pill: var(--tlz-muted); }

/* ---- Status dots ---- */
.tlz-dot { display: inline-block; width: 8px; height: 8px; flex: none; border-radius: 50%; background: var(--tlz-muted); vertical-align: middle; }
.tlz-dot-ok { background: var(--tlz-ok); }
.tlz-dot-warn { background: var(--tlz-warn); }
.tlz-dot-err { background: var(--tlz-err); }
.tlz-dot-info { background: var(--tlz-info); }
.tlz-dot-accent { background: var(--tlz-accent); }
.tlz-dot-gold { background: var(--tlz-gold); }

/* ---- Inputs ---- */
.tlz-input, .tlz-page input {
  width: 100%;
  max-width: 420px;
  min-height: 38px;
  padding: 8px 11px;
  border: 1px solid var(--tlz-line);
  border-radius: var(--tlz-radius-sm);
  background: var(--tlz-field);
  color: var(--tlz-ink);
  font: 14px/1.4 var(--tlz-font);
}
.tlz-input:focus-visible, .tlz-page input:focus-visible { outline: 2px solid var(--tlz-accent); outline-offset: 1px; border-color: var(--tlz-accent); }
.tlz-field { padding: 16px 0; border-top: 1px solid var(--tlz-line); }
.tlz-field label { display: block; color: var(--tlz-ink); font-weight: 650; }
.tlz-field p { margin: 6px 0 10px; color: var(--tlz-muted); font-size: 13px; }

@media (prefers-reduced-motion: reduce) {
  .tlz-fold > summary::before { transition: none; }
}

@media (max-width: 500px) {
  .tlz-stage { padding: 16px 12px; }
  .tlz-card-small { padding: 24px 20px; }
  .tlz-facts { grid-template-columns: 1fr; gap: 2px; }
  .tlz-facts dd { margin-bottom: 10px; }
}