:root {
  color-scheme: dark;
  --bg: #080a11;
  --surface: rgba(20, 24, 39, 0.74);
  --surface-strong: #111522;
  --line: rgba(255, 255, 255, 0.1);
  --text: #f5f6fb;
  --muted: #a7adbd;
  --violet: #8b7cff;
  --violet-soft: rgba(139, 124, 255, 0.12);
  --cyan: #5de0d0;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 5%, rgba(113, 90, 255, 0.16), transparent 31rem),
    radial-gradient(circle at 91% 26%, rgba(48, 203, 187, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
.shell { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(8, 10, 17, 0.84);
  backdrop-filter: blur(18px);
}

.site-header .shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  width: 35px;
  height: 35px;
  border: 2px solid #9e92ff;
  border-radius: 50%;
  box-shadow: inset 0 0 18px rgba(139, 124, 255, 0.28), 0 0 24px rgba(139, 124, 255, 0.2);
}

.brand-mark::after {
  position: absolute;
  width: 8px;
  height: 8px;
  top: -3px;
  right: 2px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  content: "";
}

.nav { display: flex; align-items: center; gap: 8px; }
.nav a { padding: 8px 11px; border-radius: 9px; color: var(--muted); font-size: 14px; text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); background: var(--violet-soft); }

.hero { padding: 120px 0 90px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 16px; color: #aaa0ff; font-size: 12px; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
h1 { max-width: 900px; margin: 0; font-size: clamp(52px, 8vw, 92px); line-height: .98; letter-spacing: -.065em; }
.hero-copy { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: clamp(18px, 2.3vw, 22px); }

.section { padding: 100px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-heading { max-width: 700px; margin-bottom: 46px; }
.section-heading h2 { margin: 0; font-size: clamp(34px, 5vw, 54px); line-height: 1.06; letter-spacing: -.045em; }
.section-heading p { margin: 18px 0 0; color: var(--muted); font-size: 18px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 28px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.card .icon { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(139, 124, 255, .25); border-radius: 12px; background: var(--violet-soft); color: #d0cbff; font-size: 19px; }
.card h3 { margin: 28px 0 8px; font-size: 21px; letter-spacing: -.025em; }
.card p { margin: 0; color: var(--muted); }
.card ul { margin: 20px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; color: #c9cdda; font-size: 14px; }
.card li { position: relative; padding-left: 17px; }
.card li + li { margin-top: 9px; }
.card li::before { position: absolute; left: 0; color: var(--cyan); content: "·"; font-weight: 900; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.split h2 { margin: 0; font-size: clamp(36px, 5vw, 56px); line-height: 1.05; letter-spacing: -.05em; }
.split-copy > p { color: var(--muted); font-size: 18px; }

.stack { display: grid; gap: 12px; }
.stack-item { display: grid; grid-template-columns: 42px 1fr; gap: 16px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .025); }
.stack-item b { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; background: var(--violet-soft); color: #c9c2ff; }
.stack-item h3 { margin: 0 0 4px; font-size: 16px; }
.stack-item p { margin: 0; color: var(--muted); font-size: 14px; }

.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.product { position: relative; overflow: hidden; min-height: 450px; padding: 34px; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.product::after { position: absolute; width: 260px; height: 260px; right: -100px; bottom: -120px; border: 1px solid rgba(139, 124, 255, .2); border-radius: 50%; box-shadow: 0 0 80px rgba(139, 124, 255, .1); content: ""; }
.product-tag { display: inline-flex; padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: #cbc5ff; font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.product h2 { margin: 80px 0 12px; font-size: clamp(31px, 4vw, 45px); line-height: 1.04; letter-spacing: -.045em; }
.product p { max-width: 500px; color: var(--muted); }
.product ul { margin: 28px 0 0; padding: 0; list-style: none; color: #d0d3df; font-size: 14px; }
.product li + li { margin-top: 9px; }
.product li::before { margin-right: 9px; color: var(--cyan); content: "✓"; }

.roadmap { display: grid; grid-template-columns: repeat(4, 1fr); }
.phase { position: relative; padding: 26px 24px 20px; border-top: 1px solid rgba(139, 124, 255, .35); }
.phase::before { position: absolute; width: 9px; height: 9px; top: -5px; left: 24px; border-radius: 50%; background: var(--violet); box-shadow: 0 0 14px var(--violet); content: ""; }
.phase span { color: #aaa0ff; font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.phase h3 { margin: 8px 0 5px; font-size: 17px; }
.phase p { margin: 0; color: var(--muted); font-size: 14px; }

.callout { display: flex; align-items: center; justify-content: space-between; gap: 35px; padding: 48px; border: 1px solid rgba(139, 124, 255, .24); border-radius: 22px; background: linear-gradient(120deg, rgba(139, 124, 255, .13), rgba(93, 224, 208, .05)); }
.callout h2 { margin: 0; font-size: clamp(30px, 4vw, 45px); line-height: 1.07; letter-spacing: -.04em; }
.callout p { margin: 10px 0 0; color: var(--muted); }
.button { flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border-radius: 11px; background: linear-gradient(135deg, #9588ff, #6f5ff0); box-shadow: 0 15px 38px rgba(102, 83, 232, .27); font-size: 14px; font-weight: 800; text-decoration: none; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer .shell { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--text); }

@media (max-width: 800px) {
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .site-header .shell { min-height: 66px; }
  .brand span:last-child { display: none; }
  .nav { gap: 1px; }
  .nav a { padding: 7px 8px; font-size: 13px; }
  .hero { padding: 78px 0 62px; }
  .section { padding: 75px 0; }
  .grid, .product-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .roadmap { grid-template-columns: 1fr; }
  .phase { border-top: 0; border-left: 1px solid rgba(139, 124, 255, .35); padding: 10px 22px 32px; }
  .phase::before { top: 16px; left: -5px; }
  .callout { align-items: flex-start; flex-direction: column; padding: 32px 26px; }
  footer .shell { align-items: flex-start; flex-direction: column; justify-content: center; gap: 5px; }
}