:root {
  --bg: #0b0c10;
  --bg2: #12141a;
  --card: #161922;
  --line: rgba(255, 255, 255, 0.08);
  --fg: #f2f3f7;
  --fg2: rgba(242, 243, 247, 0.72);
  --fg3: rgba(242, 243, 247, 0.48);
  --accent: #4f8cff;
  --accent2: #a78bfa;
  --ok: #86efac;
  --radius: 18px;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* шапка */
.top { position: sticky; top: 0; z-index: 10; background: rgba(11, 12, 16, 0.82); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 650; font-size: 17px; }
.brand img { width: 28px; height: 28px; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 20px; font-size: 14px; }
.top .nav { margin-left: auto; }
.top .lang { margin-left: auto; color: var(--fg2); font-size: 14px; font-weight: 600; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--line); }
.top .lang:hover { color: var(--fg); text-decoration: none; background: var(--card); }
.top .nav + .lang { margin-left: 0; }
.nav a { color: var(--fg2); }
.nav a:hover { color: var(--fg); text-decoration: none; }

/* кнопки */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 12px; font-weight: 600; font-size: 15px; border: 1px solid var(--line); color: var(--fg); background: var(--card); }
.btn:hover { text-decoration: none; background: #1d2130; }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; }
.btn.primary:hover { background: #3f7bf0; }
.btn small { font-weight: 400; opacity: 0.8; }

/* первый экран */
.hero { padding: 72px 0 40px; text-align: center; background: radial-gradient(1200px 500px at 50% -10%, rgba(79, 140, 255, 0.18), transparent 70%), radial-gradient(700px 400px at 85% 10%, rgba(167, 139, 250, 0.14), transparent 70%); }
.hero h1 { font-size: clamp(32px, 5vw, 54px); line-height: 1.12; margin: 0 auto 18px; max-width: 840px; letter-spacing: -0.02em; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(17px, 2vw, 20px); color: var(--fg2); max-width: 720px; margin: 0 auto 30px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .note { margin-top: 14px; font-size: 13px; color: var(--fg3); }
.hero .shot { margin: 48px auto 0; max-width: min(760px, 100%); border-radius: 22px; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55); }

/* разделы */
section { padding: 72px 0; border-top: 1px solid var(--line); }
section h2 { font-size: clamp(26px, 3.4vw, 36px); margin: 0 0 12px; letter-spacing: -0.01em; }
section .sub { color: var(--fg2); margin: 0 0 36px; max-width: 720px; }

/* возможности */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.feature h3 { margin: 0 0 6px; font-size: 17px; }
.feature p { margin: 0; color: var(--fg2); font-size: 15px; }
.feature .ico { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 14px; background: rgba(79, 140, 255, 0.14); color: var(--accent); font-size: 18px; }

/* показ экранов */
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; margin-bottom: 64px; }
.showcase:last-child { margin-bottom: 0; }
.showcase.flip > :first-child { order: 2; }
.showcase img { border-radius: 18px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5); }
.showcase h3 { font-size: 24px; margin: 0 0 10px; }
.showcase p { color: var(--fg2); margin: 0 0 10px; }
.showcase ul { color: var(--fg2); padding-left: 20px; margin: 0; }
.showcase li { margin: 4px 0; }

/* безопасность */
.trust { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.trust div { border-left: 3px solid var(--ok); padding: 4px 0 4px 16px; }
.trust b { display: block; margin-bottom: 4px; }
.trust span { color: var(--fg2); font-size: 15px; }

/* тарифы */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; max-width: 900px; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; }
.plan.main { border-color: rgba(79, 140, 255, 0.5); box-shadow: 0 0 0 1px rgba(79, 140, 255, 0.25) inset; }
.plan h3 { margin: 0; font-size: 20px; }
.plan .price { font-size: 32px; font-weight: 700; margin: 10px 0 2px; }
.plan .price small { font-size: 15px; font-weight: 400; color: var(--fg3); }
.plan .for { color: var(--fg3); font-size: 14px; margin: 0 0 18px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; flex: 1; }
.plan li { padding: 6px 0 6px 26px; position: relative; color: var(--fg2); font-size: 15px; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 700; }
.plan .btn { justify-content: center; }

/* вопросы */
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--fg3); font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--fg2); margin: 10px 0 0; }

/* подвал */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--fg3); font-size: 14px; }
footer .wrap { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; }
footer nav { display: flex; gap: 18px; margin-left: auto; }
footer a { color: var(--fg2); }

/* текстовые страницы */
.doc { max-width: 780px; padding: 48px 20px 72px; }
.doc h1 { font-size: 34px; margin: 0 0 6px; }
.doc .date { color: var(--fg3); margin: 0 0 32px; }
.doc h2 { font-size: 21px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--fg2); }
.doc .todo { background: rgba(251, 191, 36, 0.14); color: #fde68a; padding: 1px 6px; border-radius: 5px; }
.doc .warn { border: 1px solid rgba(251, 191, 36, 0.35); background: rgba(251, 191, 36, 0.08); border-radius: 12px; padding: 14px 18px; color: #fde68a; }

/* узкие экраны */
@media (max-width: 760px) {
  .nav { display: none; }
  .top .nav + .lang { margin-left: auto; }
  .hero { padding-top: 48px; }
  .showcase, .showcase.flip { grid-template-columns: 1fr; gap: 20px; }
  .showcase.flip > :first-child { order: 0; }
  section { padding: 56px 0; }
  footer nav { margin-left: 0; }
}