/* VPN Lite — vpn.vietts.io. Colors follow the app's Theme.swift (night sky, brand violet, flame). */
:root {
  --bg: #0d0a1f;
  --bg-2: #15102e;
  --sky: #1b1342;
  --card: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.09);
  --text: #f4f2ff;
  --muted: #b4acd6;
  --faint: #8a82ad;
  --violet: #9c7dff;
  --violet-deep: #5b33e6;
  --green: #30db5b;
  --orange: #ffb340;
  --flame: linear-gradient(135deg, #ff4d8d, #ff7448 55%, #ffa23d);
  --brand: linear-gradient(135deg, #9c7dff, #7652ff 50%, #5b33e6);
  --radius: 22px;
  --max: 1080px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(118, 78, 255, 0.35), transparent 60%),
    radial-gradient(900px 500px at 95% 0%, rgba(255, 104, 72, 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
}

a { color: var(--violet); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(160%) blur(16px); -webkit-backdrop-filter: saturate(160%) blur(16px); background: rgba(13, 10, 31, 0.72); border-bottom: 1px solid var(--card-border); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); text-decoration: none; }

/* Hero */
.hero { padding: 72px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--card); border: 1px solid var(--card-border); color: var(--muted); font-size: 14px; }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }
h1 { font-size: clamp(40px, 6vw, 64px); line-height: 1.05; letter-spacing: -0.02em; margin: 18px 0 16px; }
h1 .grad { background: var(--flame); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 20px; color: var(--muted); max-width: 34em; margin: 0 0 28px; }
.cta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.badge img { height: 54px; width: auto; }
.cta-note { color: var(--faint); font-size: 14px; }
.hero-shot { justify-self: center; max-width: 340px; filter: drop-shadow(0 30px 60px rgba(91, 51, 230, 0.45)); border-radius: 28px; overflow: hidden; }

/* Sections */
section { padding: 56px 0; }
h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.01em; line-height: 1.15; margin: 0 0 12px; }
.section-lead { color: var(--muted); max-width: 40em; margin: 0 0 32px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 14px 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--brand); box-shadow: 0 8px 20px rgba(91, 51, 230, 0.4); }
.icon svg { width: 22px; height: 22px; stroke: #fff; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon.flame { background: var(--flame); box-shadow: 0 8px 20px rgba(255, 116, 72, 0.35); }

.shots { display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px; }
.shots img { flex: 0 0 auto; width: 240px; border-radius: 24px; scroll-snap-align: start; border: 1px solid var(--card-border); }

.privacy-box { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; gap: 10px; padding: 8px 0; color: var(--muted); border-bottom: 1px solid var(--card-border); }
.list li:last-child { border-bottom: 0; }
.list .k { color: var(--text); font-weight: 600; }
.yes::before, .no::before { flex: 0 0 auto; font-weight: 700; }
.yes::before { content: "•"; color: var(--orange); }
.no::before { content: "✕"; color: var(--green); }
.note { margin-top: 16px; padding: 16px 18px; border-radius: 16px; background: rgba(255, 179, 64, 0.08); border: 1px solid rgba(255, 179, 64, 0.25); color: var(--muted); font-size: 15px; }

.final-cta { text-align: center; }
.final-cta img.app-icon { width: 96px; height: 96px; border-radius: 22px; margin: 0 auto 18px; box-shadow: 0 20px 50px rgba(91, 51, 230, 0.5); }
.final-cta .cta { justify-content: center; }
.center { margin-left: auto; margin-right: auto; }

/* Documents (privacy, terms, support) */
.doc { padding: 48px 0 64px; }
.doc .wrap { max-width: 780px; }
.doc h1 { font-size: clamp(34px, 5vw, 46px); margin-top: 0; }
.doc .meta { color: var(--faint); font-size: 15px; margin: -6px 0 28px; }
.doc h2 { font-size: 24px; margin: 40px 0 10px; }
.doc h3 { font-size: 19px; margin: 24px 0 8px; }
.doc p, .doc li { color: #ddd8f5; }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0 8px; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--card-border); }
.doc th { color: var(--text); background: var(--card); }
.doc td { color: #ddd8f5; }
.table-scroll { overflow-x: auto; }
.summary { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 8px 22px; margin: 0 0 8px; }
.summary h2 { margin-top: 16px; }
.toc { columns: 2; font-size: 15px; padding-left: 20px; }

details { background: var(--card); border: 1px solid var(--card-border); border-radius: 16px; padding: 14px 18px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 600; color: var(--text); }
details p { margin: 10px 0 0; }

.contact { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 18px 0 8px; }
.contact a.card { color: var(--text); }
.contact a.card:hover { text-decoration: none; border-color: var(--violet); }
.contact .card span { display: block; color: var(--muted); font-size: 15px; word-break: break-word; }

/* Footer */
.site-footer { border-top: 1px solid var(--card-border); padding: 32px 0 44px; color: var(--faint); font-size: 14px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }
.legal-small { font-size: 12px; color: var(--faint); margin-top: 8px; max-width: 40em; }

@media (max-width: 860px) {
  .hero { padding-top: 40px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; }
  .hero-shot { max-width: 280px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .privacy-box { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .nav { gap: 14px; font-size: 14px; }
  .nav .hide-sm { display: none; }
  .grid { grid-template-columns: 1fr; }
  .lead { font-size: 18px; }
  .toc { columns: 1; }
  .shots img { width: 200px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }