/* Privacy Pages — shared design system */

:root {
  color-scheme: light dark;
  --bg: #F6F8FC;
  --bg-soft: #EEF2F8;
  --surface: #FFFFFF;
  --text: #14213D;
  --text-dim: #5B6B84;
  --border: #E3E8F0;
  --primary: #2563EB;
  --primary-dark: #1E3A5F;
  --primary-soft: #EFF6FF;
  --primary-soft-border: #BFDBFE;
  --danger-soft: #FEF2F2;
  --danger-soft-border: #FECACA;
  --danger-text: #7F1D1D;
  --danger-accent: #DC2626;
  --shadow-sm: 0 1px 2px rgba(20, 33, 61, 0.06);
  --shadow-md: 0 12px 32px -12px rgba(20, 33, 61, 0.18);
  --shadow-lg: 0 24px 60px -20px rgba(20, 33, 61, 0.28);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --surface-glass: rgba(255, 255, 255, 0.72);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0A0F1C;
    --bg-soft: #0E1526;
    --surface: #121A2E;
    --text: #E7ECF7;
    --text-dim: #94A3B8;
    --border: #23304A;
    --primary: #6EA8FF;
    --primary-dark: #9DC2FF;
    --primary-soft: #152238;
    --primary-soft-border: #24365A;
    --danger-soft: #2A1416;
    --danger-soft-border: #4C2026;
    --danger-text: #FCA5A5;
    --danger-accent: #F87171;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 32px -12px rgba(0, 0, 0, 0.55);
    --shadow-lg: 0 24px 60px -20px rgba(0, 0, 0, 0.65);
    --surface-glass: rgba(18, 26, 46, 0.66);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

h1, h2, h3, .app-name, .badge, .toc-label {
  font-family: 'Sora', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Fixed page background (persists across scroll, every page) ---------- */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.page-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% -10%, rgba(37, 99, 235, 0.05), transparent 60%);
}

/* ---------- Gradient heading text ---------- */
.gradient-text {
  background: linear-gradient(100deg, var(--text) 10%, var(--primary) 45%, #7C3AED 65%, var(--text) 90%);
  background-size: 250% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 8s ease-in-out infinite;
}
@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}
@media (prefers-reduced-motion: reduce) {
  .gradient-text { animation: none; background-position: 30% center; }
}

/* ---------- Reading progress bar ---------- */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), #7C3AED);
  z-index: 60;
  transition: width 0.1s linear;
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* ---------- Hero (landing pages) ---------- */
.hero {
  padding: 72px 20px 56px;
  text-align: center;
}

/* Ambient orbs, fixed to the viewport so they persist as the page scrolls */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.28;
  animation: float 18s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) { .orb { animation: none; } }
.orb-a { width: 380px; height: 380px; background: #2563EB; top: -140px; left: -100px; }
.orb-b { width: 340px; height: 340px; background: #7C3AED; top: 55vh; right: -100px; animation-delay: -6s; }
.orb-c { width: 260px; height: 260px; background: #06B6D4; top: 20vh; left: 55vw; animation-delay: -11s; opacity: 0.18; }
.orb-d { width: 300px; height: 300px; background: #2563EB; bottom: -120px; left: 30vw; animation-delay: -14s; opacity: 0.16; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(24px, -28px) scale(1.08); }
  66% { transform: translate(-18px, 20px) scale(0.94); }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--primary-soft-border);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  animation: fadeInUp 0.7s var(--ease) both;
}

.hero h1 {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  animation: fadeInUp 0.7s var(--ease) both;
  animation-delay: 0.06s;
}
.hero .lede {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto;
  animation: fadeInUp 0.7s var(--ease) both;
  animation-delay: 0.12s;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .badge, .hero h1, .hero .lede { animation: none; }
}

/* ---------- Page shell ---------- */
.wrap { max-width: 900px; margin: 0 auto; padding: 0 20px 80px; }
.wrap-narrow { max-width: 720px; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 16px; }
.card {
  background: var(--surface-glass);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.card.hoverable:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-soft-border);
}

.app-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.app-card .app-id { display: flex; align-items: center; gap: 12px; }
.app-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-soft-border);
}
.app-name { font-weight: 700; font-size: 16px; }
.app-sub { font-size: 13px; color: var(--text-dim); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), opacity 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); text-decoration: none; opacity: 0.96; }
.btn:active { transform: translateY(0); }
.btn-block { display: flex; width: 100%; }
.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.links-col { display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }

/* ---------- Notice card (privacy short-version / TOS warning) ---------- */
.notice {
  background: var(--primary-soft);
  border: 1px solid var(--primary-soft-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin: 22px 0 8px;
  position: relative;
}
.notice.danger {
  background: var(--danger-soft);
  border-color: var(--danger-soft-border);
  color: var(--danger-text);
}
.notice.danger strong { color: var(--danger-accent); }

/* ---------- Legal document layout ---------- */
.doc-header {
  padding: 56px 0 28px;
  animation: fadeInUp 0.6s var(--ease) both;
}
.doc-header h1 { font-size: 34px; font-weight: 800; letter-spacing: -0.01em; margin: 0 0 8px; }
.doc-header .updated { color: var(--text-dim); font-size: 13px; }
@media (prefers-reduced-motion: reduce) { .doc-header { animation: none; } }

.doc-panel {
  background: var(--surface-glass);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 36px 36px 44px;
  animation: fadeInUp 0.7s var(--ease) both;
  animation-delay: 0.1s;
}
@media (prefers-reduced-motion: reduce) { .doc-panel { animation: none; } }
@media (max-width: 640px) { .doc-panel { padding: 24px 18px 32px; } }

.doc-layout { display: grid; grid-template-columns: 220px 1fr; gap: 40px; align-items: start; }
@media (max-width: 760px) { .doc-layout { grid-template-columns: 1fr; } }

.toc {
  position: sticky;
  top: 24px;
}
.toc-label { font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-dim); margin-bottom: 10px; padding-left: 14px; }
.toc a {
  display: block;
  font-size: 13.5px;
  color: var(--text-dim);
  padding: 6px 0 6px 14px;
  border-left: 2px solid var(--border);
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}
.toc a:hover, .toc a.active { color: var(--primary); text-decoration: none; border-left-color: var(--primary); background: var(--primary-soft); }

@media (max-width: 760px) {
  .toc {
    position: static;
    display: flex;
    overflow-x: auto;
    gap: 6px;
    border-left: none;
    padding: 0 0 14px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border);
  }
  .toc-label { display: none; }
  .toc a {
    flex: none;
    white-space: nowrap;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 14px;
    margin-left: 0;
  }
  .toc a:hover, .toc a.active { background: var(--primary-soft); border-color: var(--primary-soft-border); }
}

.doc-body section { scroll-margin-top: 20px; }
.doc-body h2 {
  font-size: 18px;
  margin-top: 40px;
  color: var(--primary-dark);
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.doc-body h2 .num { color: var(--primary); font-variant-numeric: tabular-nums; }
.doc-body ul { padding-left: 22px; }
.doc-body p { color: var(--text); }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  z-index: 50;
}
.to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { border-color: var(--primary-soft-border); color: var(--primary); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--text-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: center;
}