:root {
  --bg: #0e1422;
  --bg2: #161d2f;
  --panel: rgba(255,255,255,.04);
  --border: rgba(255,255,255,.08);
  --text: #e9eef7;
  --muted: #9aa6bd;
  --dim: #5d6a85;
  --accent: #2f7bff;
  --accent-h: #4d8eff;
  --red: #ff4f5e;
  --amber: #f0a93b;
  --blue: #5fa8ff;
  --ok: #2dc26b;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
  color: var(--text);
  min-height: 100vh;
  display: flex; flex-direction: column;
  line-height: 1.55;
}
a { color: var(--accent-h); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ========== Header ========== */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,20,34,.85);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: 1px solid var(--border);
}
header.site .row {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 24px;
}
.logo {
  font-weight: 700; font-size: 17px; letter-spacing: -.2px;
  color: var(--text);
}
.logo span { color: var(--accent); }
nav.main { display: flex; gap: 22px; }
nav.main a {
  color: var(--muted); font-size: 14px; font-weight: 500;
}
nav.main a:hover, nav.main a.active { color: var(--text); text-decoration: none; }
.cta-top {
  background: var(--accent); color: #fff; padding: 9px 16px;
  border-radius: 8px; font-size: 14px; font-weight: 600;
  white-space: nowrap;
}
.cta-top:hover { background: var(--accent-h); text-decoration: none; }

/* Hamburger (CSS-only, hidden on desktop) */
.nav-toggle { display: none; }
.burger { display: none; cursor: pointer; width: 40px; height: 40px; padding: 8px; margin-left: auto; }
.burger span {
  display: block; width: 100%; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform .2s, opacity .2s;
}
.burger span + span { margin-top: 6px; }

/* ========== Hero ========== */
section { padding: 56px 0; }
.hero { padding: 64px 0 40px; }
.badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: rgba(47,123,255,.18); color: #6cb4ff;
  font-size: 12px; letter-spacing: .5px; text-transform: uppercase;
  margin-bottom: 16px;
}
h1 { font-size: 44px; line-height: 1.1; margin: 0 0 16px; letter-spacing: -.6px; }
h1 .accent { color: var(--accent-h); }
.lead {
  color: var(--muted); font-size: 18px; max-width: 640px;
  margin: 0 0 12px;
}
.lead-list {
  color: var(--muted); font-size: 16px; max-width: 640px;
  margin: 0 0 16px; padding-left: 22px; line-height: 1.7;
}
.lead-list li { padding: 2px 0; }
.lead-list li::marker { color: var(--accent); }
.lead-note {
  color: var(--muted); font-size: 16px; max-width: 640px;
  margin: 0 0 32px;
}
h2 { font-size: 28px; margin: 0 0 12px; letter-spacing: -.3px; }
h3 { font-size: 18px; margin: 0 0 8px; }
.subtitle { color: var(--muted); margin: 0 0 32px; max-width: 640px; }

/* ========== Form ========== */
.checker {
  display: flex; gap: 8px; padding: 12px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px;
  max-width: 640px;
}
.checker input {
  flex: 1; padding: 14px 16px; border: 0; border-radius: 10px;
  background: rgba(0,0,0,.35); color: #fff; font-size: 16px; outline: none;
}
.checker input::placeholder { color: var(--dim); }
.btn {
  display: inline-block; padding: 12px 20px; border: 0; border-radius: 10px;
  background: var(--accent); color: #fff; cursor: pointer;
  font-weight: 600; font-size: 15px; text-decoration: none;
}
.btn:hover { background: var(--accent-h); text-decoration: none; }
.btn-ghost {
  background: transparent; border: 1px solid var(--border); color: var(--text);
}
.btn-ghost:hover { background: var(--panel); }
.btn:disabled { opacity: .5; cursor: progress; }

#result {
  margin-top: 22px; padding: 22px;
  border-radius: 14px; background: var(--panel); border: 1px solid var(--border);
  display: none;
}
#result.show { display: block; }
.r-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 16px 0 8px; }
.r-cell {
  background: rgba(0,0,0,.25); border-radius: 10px; padding: 14px 12px;
  text-align: center;
}
.r-cell .num { font-size: 28px; font-weight: 700; line-height: 1; }
.r-cell .lbl { font-size: 12px; color: var(--muted); margin-top: 6px; text-transform: uppercase; letter-spacing: .4px; }
.r-cell.crit .num { color: var(--red); }
.r-cell.med  .num { color: var(--amber); }
.r-cell.cosm .num { color: var(--blue); }
.r-cell.fine .num { color: var(--text); font-size: 18px; }
.r-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; gap: 12px; flex-wrap: wrap; }
.r-foot .hint { color: var(--muted); font-size: 13px; }

/* ========== Feature cards ========== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  padding: 22px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--border);
}
.card .icon {
  width: 36px; height: 36px; border-radius: 9px; margin-bottom: 14px;
  display: grid; place-items: center; font-size: 18px;
  background: rgba(47,123,255,.18); color: #6cb4ff;
}
.card p { color: var(--muted); margin: 8px 0 0; }

/* ========== Pricing ========== */
.tariffs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.tariff {
  padding: 26px; border-radius: 16px;
  background: var(--panel); border: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.tariff.pop { border-color: var(--accent); position: relative; }
.tariff.pop::before {
  content: 'Популярный'; position: absolute; top: -12px; left: 24px;
  background: var(--accent); color: #fff; font-size: 12px;
  padding: 4px 10px; border-radius: 999px; font-weight: 600;
}
.tariff h3 { font-size: 17px; }
.tariff .price { font-size: 32px; font-weight: 700; margin: 10px 0 4px; }
.tariff .price span { font-size: 14px; color: var(--muted); font-weight: 500; }
.tariff ul { list-style: none; padding: 0; margin: 16px 0; flex: 1; }
.tariff li { padding: 6px 0; color: var(--muted); font-size: 14px; }
.tariff li::before { content: '✓ '; color: var(--ok); margin-right: 4px; }

/* ========== Steps ========== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: step; }
.step {
  padding: 22px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--border);
  position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: 18px; right: 22px;
  font-size: 38px; font-weight: 800; color: rgba(47,123,255,.25);
  line-height: 1;
}

/* ========== FAQ ========== */
.faq { max-width: 760px; }
details {
  border-top: 1px solid var(--border); padding: 18px 0;
}
details:last-child { border-bottom: 1px solid var(--border); }
summary { cursor: pointer; font-weight: 600; font-size: 16px; }
summary::-webkit-details-marker { display: none; }
details[open] summary { color: var(--accent-h); }
details p { color: var(--muted); margin: 12px 0 0; }

/* ========== Cases ========== */
.cases { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case {
  padding: 22px; border-radius: 14px;
  background: var(--panel); border: 1px solid var(--border);
}
.case .meta { color: var(--dim); font-size: 13px; margin-bottom: 8px; }
.case .nums { display: flex; gap: 18px; margin: 12px 0; color: var(--muted); font-size: 14px; }
.case .nums b { color: var(--text); }

/* ========== Footer ========== */
footer.site {
  margin-top: auto; padding: 32px 0 24px;
  border-top: 1px solid var(--border); color: var(--dim); font-size: 13px;
}
footer.site .row { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }

/* ========== Mobile ========== */
@media (max-width: 860px) {
  .container { padding: 0 16px; }
  header.site .row { min-height: 56px; height: auto; gap: 10px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
  .logo { order: 0; }
  .cta-top { order: 1; margin-left: auto; padding: 8px 12px; font-size: 13px; }
  .burger { order: 2; display: block; margin-left: 4px; }
  nav.main {
    order: 3; flex-basis: 100%;
    flex-direction: column; gap: 0;
    max-height: 0; overflow: hidden;
    transition: max-height .25s ease;
    border-top: 1px solid transparent;
  }
  .nav-toggle:checked ~ nav.main {
    max-height: 360px;
    border-top-color: var(--border);
    padding: 8px 0 12px;
  }
  .nav-toggle:checked ~ .burger span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .nav-toggle:checked ~ .burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .burger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  nav.main a {
    padding: 12px 4px; font-size: 16px;
    border-bottom: 1px solid var(--border);
  }
  nav.main a:last-child { border-bottom: 0; }

  section { padding: 40px 0; }
  .hero { padding: 36px 0 24px; }
  h1 { font-size: 30px; line-height: 1.15; letter-spacing: -.3px; }
  h2 { font-size: 24px; }
  .lead { font-size: 16px; margin-bottom: 24px; }
  .subtitle { margin-bottom: 24px; }

  .cards, .tariffs, .steps, .cases { grid-template-columns: 1fr; gap: 14px; }
  .card, .step { padding: 18px; }
  .tariff { padding: 22px; }
  .tariff.pop::before { left: 18px; top: -10px; font-size: 11px; padding: 3px 8px; }

  .checker { flex-direction: column; padding: 10px; }
  .checker input { font-size: 16px; padding: 13px 14px; }
  .btn { width: 100%; text-align: center; padding: 13px 18px; }
  .checker .btn { width: 100%; }

  #result { padding: 16px; margin-top: 16px; }
  .r-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .r-cell { padding: 12px 10px; }
  .r-cell .num { font-size: 24px; }
  .r-cell.fine .num { font-size: 16px; }
  .r-foot { flex-direction: column; align-items: stretch; }
  .r-foot .hint { text-align: center; }

  /* Buy modal (uses inline styles in home.ejs — override via id) */
  #buy-modal { padding: 0 !important; }
  #buy-modal > div {
    padding: 20px !important; margin-top: 0 !important;
    border-radius: 0 !important; min-height: 100vh;
    max-width: 100% !important;
  }
  #buy-modal #buy-tabs { flex-direction: column !important; }
  #buy-modal #buy-tabs .btn { font-size: 15px; }
  #buy-modal .buy-actions { flex-direction: column-reverse !important; }
  #buy-modal #buy-submit { flex: none !important; }

  footer.site .row { flex-direction: column; gap: 14px; text-align: left !important; }
  footer.site .row > div { text-align: left !important; }
}

@media (max-width: 480px) {
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
  .badge { font-size: 11px; }
  .hero { padding: 24px 0 20px; }
  section { padding: 32px 0; }
  .logo { font-size: 16px; }
  .cta-top { padding: 7px 12px; font-size: 12px; }
  .r-cell .num { font-size: 22px; }
  .step::before { font-size: 30px; top: 14px; right: 16px; }
}