:root {
  --bg: #0e0f13; --bg-2: #14161c; --line: rgba(255,255,255,.09); --line-2: rgba(255,255,255,.16);
  --text: #f1f2f5; --muted: #9ba0ab; --accent: #7aa2ff; --accent-2: #a78bfa; --ok: #7fd1a8;
  font-family: 'Segoe UI Variable', 'Segoe UI', system-ui, -apple-system, sans-serif; color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6; font-size: 16px; }
a { color: var(--accent); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px clamp(16px, 5vw, 56px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 650; }
.top nav { display: flex; gap: 20px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; }
.top nav a:hover { color: var(--text); }
main { max-width: 1080px; margin: 0 auto; padding: 0 clamp(16px, 5vw, 32px) 64px; }

.hero { display: grid; grid-template-columns: 1.25fr .75fr; gap: 32px; align-items: center; padding: clamp(32px, 7vw, 72px) 0 40px; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 0 0 16px; font-size: clamp(34px, 6vw, 54px); line-height: 1.08; letter-spacing: -.025em; }
h2 { margin: 0 0 14px; font-size: 22px; letter-spacing: -.01em; }
h3 { margin: 0 0 6px; font-size: 16px; }
.lead { margin: 0 0 22px; color: #c8cbd5; font-size: 18px; max-width: 540px; }
.promises { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.promises span { padding: 5px 12px; border-radius: 999px; font-size: 13px; color: #d6d9e2; background: rgba(255,255,255,.06); border: 1px solid var(--line); }

.gate { margin: 0 0 22px; padding: 18px; border-radius: 16px; background: var(--bg-2); border: 1px solid var(--line); }
.gate h2 { font-size: 17px; margin-bottom: 4px; }
.gate-note { margin: 0 0 12px; font-size: 13.5px; color: var(--muted); }
.player { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #000 radial-gradient(400px 160px at 50% 0, rgba(122,162,255,.18), transparent 70%); border: 1px solid var(--line); }
.play { position: absolute; inset: 0; width: 100%; border: 0; background: transparent; color: var(--text); font: inherit; font-size: 17px; font-weight: 600; cursor: pointer; }
.play:hover { background: rgba(255,255,255,.05); }
.progress { height: 6px; margin-top: 10px; border-radius: 3px; background: rgba(255,255,255,.1); overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .4s linear; }

.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border-radius: 12px; border: 1px solid var(--line-2); background: rgba(255,255,255,.05); color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; }
.btn:hover { background: rgba(255,255,255,.1); }
.btn.primary { border-color: transparent; color: #0b1020; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn[aria-disabled="true"] { opacity: .45; pointer-events: none; }
.meta { margin: 12px 0 0; color: var(--muted); font-size: 13.5px; }
.fine { color: var(--muted); font-size: 13.5px; }

.hero-art { display: grid; place-items: center; }
.hero-art svg { width: min(100%, 280px); height: auto; filter: drop-shadow(0 20px 50px rgba(122,162,255,.18)); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 8px 0 28px; }
.features article, .panel { padding: 20px 22px; border-radius: 16px; background: rgba(255,255,255,.035); border: 1px solid var(--line); }
.features p { margin: 0; color: var(--muted); font-size: 14.5px; }
.panel { margin-top: 16px; }
.panel ol, .panel ul { padding-left: 22px; }
.panel li { margin: 8px 0; }
code { padding: 2px 7px; border-radius: 6px; background: rgba(255,255,255,.08); font-family: Consolas, monospace; font-size: 13px; word-break: break-all; }
.sha { margin-top: 18px; padding: 12px 16px; border-radius: 12px; background: rgba(0,0,0,.22); border: 1px solid var(--line); }
.sha summary { cursor: pointer; font-weight: 600; color: var(--muted); }
.sha[open] summary { color: var(--text); margin-bottom: 8px; }
.sha code { display: block; margin: 8px 0; }

footer { max-width: 1080px; margin: 0 auto; padding: 24px clamp(16px, 5vw, 32px) 56px; border-top: 1px solid var(--line); }
footer p { margin: 6px 0; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero-art svg { width: 180px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .progress i { transition: none; } }