:root {
  --bg: #07111d;
  --panel: #0e1c2b;
  --panel-2: #132337;
  --text: #edf4fb;
  --muted: #aab8c7;
  --line: #26384d;
  --brand: #48a3ff;
  --accent: #37d5a2;
  --warn: #ffd166;
  --max: 1180px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 29, .92);
  backdrop-filter: blur(14px);
}
.nav-inner { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .02em; }
.logo-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--brand); color: #fff; font-size: 11px; font-weight: 900; letter-spacing: .02em; }
.nav-links { display: flex; gap: 22px; align-items: center; color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); }
.hero { padding: 78px 0 56px; border-bottom: 1px solid var(--line); }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .12em; }
h1, h2, h3 { line-height: 1.12; margin: 0; letter-spacing: 0; }
h1 { max-width: 920px; margin-top: 14px; font-size: clamp(42px, 7vw, 78px); }
h2 { font-size: clamp(30px, 4vw, 48px); }
h3 { font-size: 22px; }
.lead { max-width: 780px; margin: 22px 0 0; color: var(--muted); font-size: 19px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 750;
}
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.secondary { background: transparent; color: var(--text); }
.section { padding: 64px 0; }
.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}
.card p, .muted { color: var(--muted); }
.kpi { color: var(--brand); font-size: 28px; font-weight: 850; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 720px; background: var(--panel); }
th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--text); background: var(--panel-2); }
td { color: var(--muted); }
.badge { display: inline-flex; padding: 4px 9px; border-radius: 8px; background: rgba(72,163,255,.14); color: #9bccff; font-size: 12px; font-weight: 800; }
.crumbs { margin-bottom: 16px; color: var(--muted); font-size: 14px; }
.crumbs a { color: #c9d8e8; }
.product-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 440px); gap: 34px; align-items: start; }
.product-image { background: #fff; border-radius: 8px; padding: 14px; border: 1px solid var(--line); }
.spec-list { display: grid; gap: 10px; margin-top: 22px; }
.spec-list div { display: flex; justify-content: space-between; gap: 18px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.spec-list dt { color: var(--muted); }
.spec-list dd { margin: 0; font-weight: 750; text-align: right; }
.faq details { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 16px 18px; }
.faq details + details { margin-top: 12px; }
.faq summary { cursor: pointer; font-weight: 800; }
.footer { padding: 44px 0; border-top: 1px solid var(--line); color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 24px; }
.footer a { color: #cbd8e6; display: block; margin: 8px 0; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
label { display: grid; gap: 6px; color: var(--muted); font-weight: 700; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #081522;
  color: var(--text);
  padding: 12px;
  font: inherit;
}
textarea { min-height: 130px; }
.wide { grid-column: 1 / -1; }

@media (max-width: 860px) {
  .nav-inner { height: auto; padding: 18px 0; align-items: flex-start; }
  .nav-links { flex-wrap: wrap; justify-content: flex-end; }
  .grid.two, .grid.three, .grid.four, .product-hero, .footer-grid, .form-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 46px; }
}