:root {
  --demo-bg: #0d0f12;
  --demo-card: #15191f;
  --demo-border: #292f38;
  --demo-text: #f7f9fb;
  --demo-muted: #9aa4b2;
  --demo-accent: #f6c90e;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--demo-bg); }
body { margin: 0; min-height: 100vh; color: var(--demo-text); background: radial-gradient(circle at 70% 10%, #252019 0, transparent 26rem), var(--demo-bg); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, input, textarea { font: inherit; }
.demo-header { min-height: 78px; display: flex; align-items: center; justify-content: space-between; padding: 18px clamp(20px, 5vw, 72px); border-bottom: 1px solid var(--demo-border); }
.demo-brand { display: flex; gap: 12px; align-items: center; color: inherit; text-decoration: none; }
.demo-brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: var(--demo-accent); color: #111; font-weight: 950; }
.demo-brand strong, .demo-brand small { display: block; }
.demo-brand small { margin-top: 2px; color: var(--demo-muted); font-size: 12px; }
.demo-badge { border: 1px solid #4b4530; background: #221f14; color: #f9d94e; border-radius: 999px; padding: 8px 12px; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.demo-hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; min-height: 68vh; align-items: center; padding: 72px 0 54px; }
.eyebrow { color: var(--demo-accent); font-weight: 900; font-size: 12px; letter-spacing: .14em; }
h1 { max-width: 760px; margin: 14px 0 20px; font-size: clamp(42px, 7vw, 86px); line-height: .96; letter-spacing: -.055em; }
.demo-lead { max-width: 720px; color: #c2c8d0; font-size: clamp(17px, 2vw, 21px); line-height: 1.65; }
code { border: 1px solid var(--demo-border); border-radius: 8px; background: #161a20; padding: 2px 6px; color: #fff; }
.demo-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.primary-button, .secondary-button { border: 0; border-radius: 14px; padding: 14px 18px; font-weight: 850; cursor: pointer; }
.primary-button { background: var(--demo-accent); color: #111; }
.secondary-button { background: #20252c; color: #f5f7fa; border: 1px solid #303741; }
.health-card { margin-top: 18px; width: fit-content; max-width: 100%; border: 1px solid var(--demo-border); border-radius: 14px; padding: 13px 15px; background: #11151a; color: #d5dae0; font-size: 14px; }
.demo-bike-card { min-height: 420px; border: 1px solid #393424; border-radius: 34px; background: linear-gradient(145deg, #181b20, #101216); padding: 24px; box-shadow: 0 40px 90px rgba(0,0,0,.35); }
.speed-label { display: inline-flex; padding: 7px 9px; border-radius: 9px; background: #252113; color: var(--demo-accent); font-weight: 900; font-size: 11px; letter-spacing: .12em; }
.bike-visual { display: grid; place-items: center; min-height: 240px; color: var(--demo-accent); font-size: 140px; font-weight: 950; letter-spacing: -.08em; }
.spec-row { display: flex; justify-content: space-between; gap: 24px; padding: 13px 0; border-top: 1px solid var(--demo-border); color: var(--demo-muted); font-size: 13px; }
.spec-row strong { color: #fff; text-align: right; }
.demo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; padding: 20px 0 80px; }
.demo-grid article { border: 1px solid var(--demo-border); background: var(--demo-card); border-radius: 22px; padding: 24px; }
.demo-grid article > span { color: var(--demo-accent); font-weight: 900; }
.demo-grid h2 { margin: 24px 0 10px; font-size: 22px; }
.demo-grid p { margin: 0; color: var(--demo-muted); line-height: 1.6; }
.demo-footer { padding: 28px 20px 110px; text-align: center; color: #727c89; font-size: 12px; }
@media (max-width: 850px) {
  .demo-hero { grid-template-columns: 1fr; gap: 24px; padding-top: 48px; }
  .demo-bike-card { min-height: 320px; }
  .bike-visual { min-height: 160px; font-size: 100px; }
  .demo-grid { grid-template-columns: 1fr; }
}