:root {
  --bg: #07090e; --bg2: #0c1018; --card: #111621; --line: rgba(255,255,255,.08);
  --text: #e2e8f0; --muted: #94a3b8; --dim: #64748b; --accent: #818cf8; --accent-strong: #6366f1; --sky: #38bdf8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 780px; }
.center { text-align: center; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; background: #fff; color: #000; padding: 8px 12px; border-radius: 8px; z-index: 50; }

.top { position: sticky; top: 0; z-index: 20; background: rgba(7,9,14,.82); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; color: #fff; white-space: nowrap; }
.logo { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(135deg, var(--accent-strong), var(--sky)); box-shadow: 0 8px 20px -6px rgba(99,102,241,.6); }
.logo svg { width: 18px; height: 18px; }
nav { display: flex; gap: 22px; margin-left: auto; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
nav a:hover { color: #fff; }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 20px; border-radius: 10px; font-weight: 600; font-size: 15px;
  text-decoration: none; color: #fff; background: var(--accent-strong); box-shadow: 0 10px 26px -10px rgba(99,102,241,.8); transition: background .15s, transform .15s; }
.btn:hover { background: #7c7ff5; transform: translateY(-1px); }
.btn.small { padding: 8px 14px; font-size: 14px; }
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,.16); box-shadow: none; color: var(--text); }
.btn.ghost:hover { background: rgba(255,255,255,.06); }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; border-radius: 6px; }

section { padding: 84px 0; }
.band { background: var(--bg2); border-block: 1px solid var(--line); }
.hero { padding: 76px 0 40px; text-align: center;
  background: radial-gradient(900px 480px at 50% -10%, rgba(99,102,241,.22), transparent 65%); }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 12px; }
h1 { font-size: clamp(32px, 5.2vw, 56px); line-height: 1.08; letter-spacing: -.025em; margin: 0 auto 20px; max-width: 900px; color: #fff; text-wrap: balance; }
h2 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 12px; color: #fff; text-wrap: balance; }
h3 { font-size: 20px; line-height: 1.3; margin: 0 0 10px; color: #fff; }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--muted); max-width: 720px; margin: 0 auto 28px; }
.sub { color: var(--muted); font-size: 17px; max-width: 720px; margin: 0 0 40px; }
.center .sub, .hero .sub { margin-inline: auto; }
.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.note { color: var(--dim); font-size: 13px; margin: 14px 0 0; }

.shot { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); background: var(--bg2);
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.9), 0 0 0 1px rgba(99,102,241,.08); }
.hero-shot { margin-top: 48px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.cards.three { grid-template-columns: repeat(3, 1fr); margin-top: 36px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 26px; }
.card p { color: var(--muted); margin: 0 0 14px; }
.card p:last-child { margin-bottom: 0; }
ul { margin: 0; padding: 0; list-style: none; }
li { position: relative; padding-left: 22px; margin: 7px 0; color: var(--text); font-size: 15px; }
ul li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.feature { display: grid; grid-template-columns: 5fr 7fr; gap: 48px; align-items: center; margin: 72px 0; }
.feature.rev .text { order: 2; }
.feature .text p { color: var(--muted); margin: 0 0 14px; }
.feature .eyebrow { color: var(--sky); }

.diagram { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 14px; align-items: center; }
.box { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; text-align: center; }
.box strong { display: block; color: #fff; }
.box span { color: var(--muted); font-size: 14px; }
.box.accent { border-color: rgba(129,140,248,.5); background: rgba(99,102,241,.12); }
.arrow { text-align: center; color: var(--dim); font-size: 12px; min-width: 110px; }
.arrow::after { content: ""; display: block; height: 2px; margin-top: 6px; background: linear-gradient(90deg, transparent, var(--accent)); }
.arrow.out::after { background: linear-gradient(90deg, var(--accent), var(--sky)); }
.steps { counter-reset: step; margin: 44px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; list-style: none; }
.steps li { counter-increment: step; padding: 0 0 0 52px; color: var(--muted); }
.steps li strong { color: #fff; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(99,102,241,.16); color: var(--accent); font-weight: 700; }

details { border-bottom: 1px solid var(--line); padding: 4px 0; }
summary { cursor: pointer; padding: 16px 28px 16px 0; font-weight: 600; color: #fff; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 22px; color: var(--dim); font-weight: 400; }
details[open] summary::after { content: "–"; }
details p { color: var(--muted); margin: 0 0 18px; }

.cta { text-align: center; }
footer { padding: 28px 0; color: var(--dim); font-size: 13px; }
.foot { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }
.legal { padding: 60px 0; }
.legal h1 { font-size: 32px; text-align: left; margin: 0 0 24px; }
.legal h2 { font-size: 20px; margin: 28px 0 8px; }
.legal p { color: var(--muted); }
.todo { background: rgba(250,178,25,.1); border: 1px solid rgba(250,178,25,.3); color: #fde68a; border-radius: 10px; padding: 12px 16px; }

@media (max-width: 880px) {
  nav { display: none; }
  .bar .btn { margin-left: auto; }
  section { padding: 56px 0; }
  .cards, .cards.three, .steps { grid-template-columns: 1fr; }
  .feature { grid-template-columns: 1fr; gap: 24px; margin: 52px 0; }
  .feature.rev .text { order: 0; }
  .diagram { grid-template-columns: 1fr; }
  .arrow { min-width: 0; }
  .arrow::after { width: 2px; height: 22px; margin: 6px auto 0; background: var(--accent); }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }