/* Tabimi (Voyami) — shared styles for the legal / support static pages.
   Brand palette mirrors VoyamiKit/Sources/VoyamiCore/BrandPalette.swift so the
   web pages read like the app: sky-azure primary, deep-navy ink, one sun-gold pop. */

:root {
  --sky:      #4FA8E0;  /* primary brand blue  (skyAzure)  */
  --deep:     #2C82CC;  /* pressed / depth     (deepAzure) */
  --navy:     #173A5C;  /* wordmark ink        (deepNavy)  */
  --gold:     #FFA92E;  /* the one warm pop    (sunGold)   */
  --ink:      #1C2B40;  /* body text on light  (inkSlate)  */

  --bg:       #f7fafc;
  --card:     #ffffff;
  --text:     #26313f;
  --muted:    #5c6b7a;
  --line:     #e3eaf1;
  --radius:   16px;
  --measure:  42rem;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
          "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC",
          "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:    #0e1620;
    --card:  #16202c;
    --text:  #dbe6f0;
    --muted: #93a4b5;
    --line:  #26333f;
    --navy:  #cfe4f6;   /* wordmark stays legible on dark */
    --ink:   #dbe6f0;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.72;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- Language switching. <html> carries .lang-en / .lang-zh; the inline
   head script sets it before first paint, so there is no flash of both. ---- */
html:not(.lang-zh) [lang="zh"] { display: none; }
html.lang-zh       [lang="en"] { display: none; }

/* ---- Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 2rem);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--navy);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
}
/* the i-tittle → sun-gold dot, echoing Lumi's light point */
.wordmark .dot {
  width: 0.34em;
  height: 0.34em;
  border-radius: 50%;
  background: var(--gold);
  display: inline-block;
  margin-left: 0.12em;
  transform: translateY(-0.04em);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px;
  background: var(--card);
}
.lang-toggle button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.lang-toggle button[aria-pressed="true"] {
  background: var(--sky);
  color: #fff;
}

/* ---- Layout ---- */
main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1rem, 4vw, 2rem) 5rem;
}

h1 {
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--navy);
  margin: 0.2em 0 0.1em;
}
h2 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--navy);
  margin: 2.4rem 0 0.6rem;
  padding-top: 0.4rem;
}
h2 .n {
  color: var(--sky);
  font-variant-numeric: tabular-nums;
  margin-right: 0.5rem;
}
p, li { color: var(--text); }
a { color: var(--deep); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--sky); }
ul { padding-left: 1.2rem; }
li { margin: 0.35rem 0; }
strong { color: var(--navy); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--sky);
  margin: 0;
}
.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.4rem 0 0;
}

/* ---- Summary / callout card ---- */
.callout {
  margin: 1.8rem 0 0.5rem;
  padding: 1.15rem 1.3rem;
  background: color-mix(in srgb, var(--sky) 9%, var(--card));
  border: 1px solid color-mix(in srgb, var(--sky) 30%, var(--line));
  border-left: 4px solid var(--sky);
  border-radius: var(--radius);
}
.callout p { margin: 0.3rem 0; }
.callout strong { color: var(--deep); }

/* ---- Home hub cards ---- */
.cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 2rem;
}
.card {
  display: block;
  padding: 1.3rem 1.4rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--sky) 45%, var(--line));
  box-shadow: 0 8px 24px -12px color-mix(in srgb, var(--navy) 40%, transparent);
}
.card h3 { margin: 0 0 0.3rem; color: var(--navy); font-size: 1.1rem; }
.card p  { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ---- Contact line ---- */
.contact {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 2rem) 3rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
}
footer a { color: var(--muted); }
footer nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.1rem; margin-bottom: 0.8rem; }

/* Landing hero — app icon + wordmark + Lumi, matches the in-app brand card. */
.hero {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 0.5rem 0 1rem;
}
.hero-icon {
  border-radius: 22%;
  box-shadow: 0 8px 24px rgba(23, 58, 92, 0.18);
}
.hero-lumi { margin-left: auto; }
.hero h1 { margin: 0; }
.hero .eyebrow { margin-bottom: 0.15rem; }
@media (max-width: 480px) {
  .hero-lumi { display: none; }
}
