:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1c1c1e;
  --muted: #5f6470;
  --accent: #1f6fe0;
  --accent-ink: #ffffff;
  --border: #e3e7ef;
  --badge: #e5484d;
  --shadow: 0 20px 50px rgba(20, 40, 80, 0.12);
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #181b21;
    --text: #f2f3f5;
    --muted: #a3a8b3;
    --accent: #4c93ff;
    --accent-ink: #0b0d10;
    --border: #2a2f38;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { padding: 18px 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.nav { display: flex; gap: 20px; font-size: 15px; }
.nav a { color: var(--muted); }
.nav a[aria-current="page"] { color: var(--text); font-weight: 600; }

/* Hero */
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; padding: 40px 0 72px; }
.hero h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
.hero p.lead { font-size: 20px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.hero-icon { width: 88px; height: 88px; border-radius: 20px; box-shadow: var(--shadow); margin-bottom: 22px; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 20px; }
.button {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--text); color: var(--bg);
  padding: 12px 22px; border-radius: 12px; font-weight: 600;
}
.button:hover { text-decoration: none; opacity: 0.9; }
.button svg { width: 20px; height: 20px; fill: currentColor; }
.cta small { color: var(--muted); font-size: 14px; }

.phones { position: relative; display: flex; justify-content: center; }
.phone {
  width: min(280px, 70%);
  border-radius: 38px;
  border: 8px solid #111;
  box-shadow: var(--shadow);
  background: #111;
  display: block;
  height: auto;
}
.phones .phone + .phone { position: absolute; width: min(230px, 55%); right: -10px; bottom: -40px; }

/* Features */
.section { padding: 64px 0; }
.section h2 { font-size: clamp(26px, 3.5vw, 34px); letter-spacing: -0.01em; margin: 0 0 10px; text-align: center; }
.section .sub { color: var(--muted); text-align: center; margin: 0 auto 40px; max-width: 36em; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.card h3 { margin: 12px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.card .icons { display: flex; gap: 6px; height: 34px; align-items: center; }
.card .icons img { width: 30px; height: 30px; }

.levels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 8px; }
.level { display: flex; align-items: center; gap: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; font-size: 15px; }
.level img { width: 34px; height: 34px; flex: none; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split img.phone { margin: 0 auto; }
.split ul { padding-left: 1.1em; color: var(--muted); }
.split li { margin: 6px 0; }
.split h2 { text-align: left; }

/* Document pages */
.doc { max-width: 760px; margin: 0 auto; padding: 24px 20px 72px; }
.doc h1 { font-size: clamp(30px, 4.5vw, 42px); letter-spacing: -0.02em; line-height: 1.15; margin: 8px 0 6px; }
.doc .meta { color: var(--muted); margin: 0 0 32px; }
.doc h2 { font-size: 22px; margin: 36px 0 8px; }
.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 1.2em; }
.doc .summary { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; }
.doc .summary p { margin: 0; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 4px 20px; margin: 10px 0; }
.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; }
.faq details p, .faq details ul { margin-top: 0; color: var(--muted); }
.contact { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-top: 32px; }
.contact p { margin: 0 0 6px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer nav { display: flex; gap: 18px; }
.site-footer a { color: var(--muted); }

@media (max-width: 820px) {
  .hero, .split { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: 16px; text-align: center; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .cta { justify-content: center; }
  .phones { padding-bottom: 40px; }
  .features, .levels { grid-template-columns: 1fr; }
  .split h2 { text-align: center; }
  .nav { gap: 14px; }
  .phones .phone + .phone { right: 0; }
}

@media (max-width: 480px) {
  .brand span { display: none; }
}