:root {
  --ink: #08060b; --ink2: #120d16; --line: #2a2230; --white: #f7f2ee; --muted: #a79eaa; --red: #e5322d;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --serif: Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ink); color: var(--white); font: 16px/1.6 var(--sans); -webkit-text-size-adjust: 100%; }
a { color: inherit; }
code { font-family: var(--mono); font-size: .92em; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; max-width: 1080px; margin: 0 auto; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 600 16px var(--mono); text-decoration: none; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--red); }
.top nav { display: flex; gap: 16px; font-size: 14px; }
.top nav a { color: var(--muted); text-decoration: none; padding: 8px 0; }
.top nav a:hover, .top nav a:focus-visible { color: var(--white); }
.top nav a:first-child { display: none; }

main { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.hero { padding: 28px 0 56px; }
.eyebrow { margin: 0 0 14px; font: 500 12px var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--red); }
h1 { margin: 0; font: 600 clamp(36px, 9vw, 76px)/1.04 var(--serif); letter-spacing: -.01em; }
h1 em { font-style: italic; color: var(--red); }
.lede { margin: 20px 0 28px; max-width: 60ch; color: var(--muted); font-size: clamp(16px, 2.4vw, 19px); }

.stage { margin: 0; border: 1px solid var(--line); background: var(--ink2); }
.stage canvas { display: block; width: 100%; height: auto; aspect-ratio: 1920 / 1040; background: #000; }
.bar { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-top: 1px solid var(--line); }
.bar button { flex: none; min-width: 72px; min-height: 44px; padding: 0 14px; background: transparent; color: var(--white); border: 1px solid var(--line); font: 500 13px var(--mono); cursor: pointer; }
.bar button:hover, .bar button:focus-visible { border-color: var(--red); outline: none; }
.bar input[type=range] { flex: 1; min-width: 0; height: 44px; accent-color: var(--red); background: transparent; }
.bar output { flex: none; font: 12px var(--mono); color: var(--muted); min-width: 92px; text-align: right; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 16px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border: 1px solid var(--line); text-decoration: none; font-weight: 600; font-size: 15px; }
.btn.primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn:hover, .btn:focus-visible { border-color: var(--white); outline: none; }
.btn.primary:hover, .btn.primary:focus-visible { background: #ff4a44; border-color: #ff4a44; }
pre { margin: 0; overflow-x: auto; }
.cmd { padding: 14px 16px; background: var(--ink2); border: 1px solid var(--line); border-left: 3px solid var(--red); font: 13px/1.5 var(--mono); }

h2 { margin: 0 0 20px; font: 600 clamp(26px, 5vw, 38px)/1.15 var(--serif); }
.how, .code { padding: 48px 0; border-top: 1px solid var(--line); }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.steps li { position: relative; padding: 20px 20px 22px; background: var(--ink); }
.steps .n { display: block; margin-bottom: 8px; font: 600 13px var(--mono); color: var(--red); }
.steps h3 { margin: 0 0 6px; font: 600 18px var(--mono); }
.steps p { margin: 0; color: var(--muted); font-size: 15px; }
.muted { color: var(--muted); margin: -8px 0 16px; }
.snippet { padding: 18px; background: var(--ink2); border: 1px solid var(--line); font: 13px/1.6 var(--mono); color: #e9e2e6; tab-size: 2; }

footer { max-width: 1080px; margin: 0 auto; padding: 32px 16px 48px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 10px; color: var(--muted); font-size: 14px; }
footer p { margin: 0; }
footer .links { display: flex; flex-wrap: wrap; gap: 16px; }
footer a { text-decoration: none; border-bottom: 1px solid var(--line); }
footer a:hover { color: var(--white); border-color: var(--red); }

@media (min-width: 640px) {
  .top { padding: 18px 24px; } main { padding: 0 24px; } footer { padding: 32px 24px 48px; }
  .top nav a:first-child { display: inline; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 980px) { .steps { grid-template-columns: repeat(4, 1fr); } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }