:root {
  --bg: #000;
  --surface: #0b0b0b;
  --surface-2: #131313;
  --line: #1f1f1f;
  --line-2: #2e2e2e;
  --text: #f5f5f5;
  --muted: #8c8c8c;
  --font: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Consolas", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 32px;
  padding: 16px max(16px, calc((100% - 1120px) / 2)); background: rgba(0,0,0,.75); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .32em; font-size: 14px; }
.brand img { width: 24px; height: 24px; }
.links { display: flex; gap: 24px; margin-left: auto; color: var(--muted); font-size: 14px; font-weight: 500; }
.links a:hover { color: var(--text); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px; height: 54px; padding: 0 26px; border-radius: 14px;
  background: #fff; color: #000; font-weight: 700; font-size: 16px; transition: transform .15s, background .15s;
}
.btn:hover { background: #dcdcdc; transform: translateY(-2px); }
.btn:active { transform: none; }
.btn.small { height: 40px; padding: 0 18px; font-size: 14px; border-radius: 10px; }

.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .24em; text-transform: uppercase; color: var(--muted); }

/* Hero */
.hero { position: relative; max-width: 1120px; margin: 0 auto; padding: 120px 16px 80px; }
.grid-bg {
  position: absolute; inset: 0 -40vw; z-index: -1;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px; mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, transparent 60%);
}
.hero-cube { position: absolute; right: 16px; top: 110px; width: 280px; animation: float 6s ease-in-out infinite; }
@keyframes float { 50% { transform: translateY(-14px); } }
.hero h1 { font-size: clamp(44px, 8vw, 92px); line-height: 1; letter-spacing: -.04em; font-weight: 800; margin: 18px 0 24px; }
.lead { max-width: 560px; color: #b5b5b5; font-size: 19px; }
.cta { display: flex; align-items: center; gap: 22px; margin-top: 36px; flex-wrap: wrap; }
.version { font: 500 13px var(--mono); color: var(--muted); }

/* Screenshot */
.showcase { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.window { border: 1px solid var(--line-2); border-radius: 18px; overflow: hidden; background: var(--surface); box-shadow: 0 40px 120px rgba(255,255,255,.06); }
.window-bar { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.window-bar span { width: 11px; height: 11px; border-radius: 50%; border: 1px solid var(--line-2); }
.window img { display: block; width: 100%; height: auto; transition: opacity .2s; }
.shot-tabs { display: flex; justify-content: center; gap: 6px; margin-top: 18px; }
.shot-tabs button {
  font: 600 14px var(--font); color: var(--muted); background: none; border: 1px solid var(--line-2);
  border-radius: 10px; padding: 8px 16px; cursor: pointer; transition: all .15s;
}
.shot-tabs button:hover { color: var(--text); }
.shot-tabs button.active { background: #fff; color: #000; border-color: #fff; }

/* Sections */
.section { max-width: 1120px; margin: 0 auto; padding: 120px 16px 0; }
.section h2, .final h2 { font-size: clamp(32px, 5vw, 52px); letter-spacing: -.03em; line-height: 1.1; margin: 14px 0 48px; font-weight: 800; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.features article { background: var(--bg); padding: 32px; transition: background .2s; }
.features article:hover { background: var(--surface); }
.features svg { width: 28px; height: 28px; margin-bottom: 20px; }
.features h3 { font-size: 18px; margin-bottom: 8px; }
.features p { color: var(--muted); font-size: 15px; }

.steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.steps li { border: 1px solid var(--line); border-radius: 20px; padding: 32px; background: var(--surface); }
.steps span { font: 500 13px var(--mono); color: var(--muted); }
.steps h3 { font-size: 20px; margin: 40px 0 8px; }
.steps p { color: var(--muted); font-size: 15px; }

.faq { display: flex; flex-direction: column; gap: 10px; max-width: 760px; }
.faq details { border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin-top: 12px; font-size: 15px; }
.faq b { color: var(--text); }

.final { text-align: center; padding: 160px 16px 140px; }
.final img { width: 72px; margin-bottom: 24px; }
.final h2 { margin-bottom: 32px; }

.footer {
  border-top: 1px solid var(--line); padding: 40px max(16px, calc((100% - 1120px) / 2));
  display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
}
.footer p { color: #555; font-size: 13px; max-width: 560px; }

@media (max-width: 860px) {
  .links { display: none; }
  .nav .btn { margin-left: auto; }
  .hero { padding-top: 72px; }
  .hero-cube { position: static; width: 120px; margin-bottom: 24px; }
  .features, .steps { grid-template-columns: 1fr; }
}