/* Sayfully web — shared design system: tokens, header, footer, buttons and legal pages.
   Colours follow the Android app (ActiveColor #6C4CF6, lavender canvas, coral mic, gold CTA). */
:root {
  --violet: #6C4CF6;
  --violet-600: #5A3BE8;
  --violet-700: #4527C9;
  --violet-50: #F3F0FF;
  --violet-100: #E7E1FF;
  --canvas: #F6F5FF;
  --card: #FFFFFF;
  --ink: #1C1838;
  --ink-2: #3D3860;
  --muted: #645F80;
  --line: #E7E4F4;
  --gold: #FBBF24;
  --gold-ink: #5A3A00;
  --coral: #FF6B57;
  --mint: #12A16B;
  --sky: #2F7BF0;
  --shadow-sm: 0 1px 2px rgba(28, 24, 56, .05), 0 4px 14px -6px rgba(28, 24, 56, .08);
  --shadow-md: 0 18px 40px -18px rgba(52, 32, 140, .28);
  --shadow-lg: 0 50px 90px -40px rgba(52, 32, 140, .45);
  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --ipa: "Noto Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --header-h: 68px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  margin: 0;
  font: 400 17px/1.65 var(--font);
  color: var(--ink);
  background: var(--canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--violet-600); text-underline-offset: 3px; }
h1, h2, h3 { margin: 0; font-weight: 800; letter-spacing: -.025em; line-height: 1.18; text-wrap: balance; }
p { margin: 0; }
:focus-visible { outline: 3px solid rgba(108, 76, 246, .45); outline-offset: 3px; border-radius: 8px; }
.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246, 245, 255, .8);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, background .2s;
}
.site-header.scrolled { background: rgba(255, 255, 255, .88); border-bottom-color: var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 21px; letter-spacing: -.02em; }
.brand img { width: 36px; height: 36px; border-radius: 11px; box-shadow: 0 6px 14px -6px rgba(108, 76, 246, .6); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav .link { padding: 8px 12px; border-radius: 10px; color: var(--ink-2); font-size: 15px; font-weight: 500; text-decoration: none; transition: background .15s, color .15s; }
.nav .link:hover { background: var(--violet-50); color: var(--violet-700); }
.nav .btn { margin-left: 8px; }
@media (max-width: 860px) { .nav .link { display: none; } }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 20px; border: 0; border-radius: 14px; cursor: pointer;
  font: 700 16px/1 var(--font); text-decoration: none; white-space: nowrap;
  transition: transform .15s, box-shadow .2s, background .2s, color .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; border-radius: 12px; }
.btn-primary { background: var(--violet); color: #fff; box-shadow: 0 12px 24px -12px rgba(108, 76, 246, .9), inset 0 -2px 0 rgba(0, 0, 0, .14); }
.btn-primary:hover { background: var(--violet-600); }
.btn-ghost { background: #fff; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line); }
.btn-ghost:hover { color: var(--violet-700); box-shadow: inset 0 0 0 1.5px #CFC4FF; }
.btn-play { min-height: 60px; padding: 0 24px 0 18px; border-radius: 16px; background: var(--ink); color: #fff; box-shadow: 0 16px 30px -16px rgba(28, 24, 56, .8); }
.btn-play:hover { background: #2A2550; }
.btn-play.light { background: #fff; color: var(--ink); box-shadow: 0 16px 30px -16px rgba(20, 8, 70, .6); }
.btn-play.light:hover { background: #FBFAFF; }
.btn-play svg { width: 26px; height: 26px; flex: none; }
.btn-play .label { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; font-size: 19px; letter-spacing: -.01em; }
.btn-play small { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; opacity: .72; }

/* ---------- footer ---------- */
.site-footer { background: #fff; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; padding: 56px 0 28px; }
.site-footer .cols { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
.site-footer .about p { margin-top: 14px; max-width: 34ch; }
.site-footer h2 { font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink); margin-bottom: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer ul a { color: var(--muted); text-decoration: none; }
.site-footer ul a:hover { color: var(--violet-700); }
.site-footer .legal { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; font-size: 14px; }
@media (max-width: 720px) {
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
  .site-footer .about { grid-column: 1 / -1; }
}

/* ---------- legal pages ---------- */
.doc-hero {
  padding: 64px 0 52px;
  background:
    linear-gradient(90deg, var(--canvas) 0%, rgba(246, 245, 255, .94) 42%, rgba(246, 245, 255, .2) 100%),
    url(/assets/scene/sky-island.webp) 85% 30% / cover no-repeat;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 760px) {
  .doc-hero { background: linear-gradient(90deg, rgba(246, 245, 255, .97), rgba(246, 245, 255, .82)), url(/assets/scene/sky-island.webp) 70% 30% / cover no-repeat; }
}
.crumbs { display: flex; gap: 8px; align-items: center; font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--violet-700); }
.doc-hero h1 { font-size: clamp(32px, 5vw, 48px); }
.doc-hero .meta { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; padding: 6px 12px; border-radius: 999px; background: #fff; box-shadow: var(--shadow-sm); font-size: 14px; color: var(--ink-2); }
.doc-hero .meta i { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); }

.doc-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 56px; padding: 44px 0 88px; }
.toc { position: sticky; top: calc(var(--header-h) + 24px); align-self: start; font-size: 14px; }
.toc strong { display: block; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--line); }
.toc a { display: block; padding: 6px 0 6px 14px; margin-left: -2px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; line-height: 1.4; }
.toc a:hover { color: var(--violet-700); border-left-color: var(--violet); }

.doc { max-width: 720px; color: var(--ink-2); line-height: 1.75; }
.doc > p, .doc > ul, .doc > ol { margin: 0 0 14px; }
.doc h2 { font-size: 23px; font-weight: 700; letter-spacing: -.015em; margin: 44px 0 12px; color: var(--ink); }
.doc h2:first-child { margin-top: 0; }
.doc h3 { font-size: 18px; font-weight: 700; letter-spacing: -.01em; margin: 26px 0 8px; color: var(--ink); }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc li::marker { color: var(--violet); }
.doc strong { color: var(--ink); }
.box { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 18px 20px; margin: 20px 0; box-shadow: var(--shadow-sm); }
.box.warm { background: #FFF8E6; border-color: #F6E2A8; box-shadow: none; }
.table-scroll { overflow-x: auto; margin: 16px 0 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.table-scroll table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 15px; line-height: 1.55; }
.table-scroll th, .table-scroll td { text-align: left; vertical-align: top; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.table-scroll tr:last-child td { border-bottom: 0; }
.table-scroll th { background: var(--violet-50); color: var(--ink); font-weight: 700; }
@media (max-width: 860px) {
  .doc-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; padding-top: 28px; }
  .toc { position: static; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px; }
}