:root {
  --bg: #080b12;
  --panel: rgba(255,255,255,.07);
  --panel-strong: rgba(255,255,255,.11);
  --text: #f6f8fb;
  --muted: #a7b1c2;
  --line: rgba(255,255,255,.13);
  --accent: #78f3d2;
  --accent-2: #8cb7ff;
  --shadow: 0 24px 80px rgba(0,0,0,.38);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(120, 243, 210, .16), transparent 34rem),
    radial-gradient(circle at top right, rgba(140, 183, 255, .18), transparent 38rem),
    var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
p { color: var(--muted); line-height: 1.7; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 18, .82);
  backdrop-filter: blur(18px);
}

.brand { display: flex; align-items: center; gap: .75rem; font-weight: 800; }
.brand-mark {
  display: grid; place-items: center;
  width: 2.2rem; height: 2.2rem;
  border-radius: .8rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #071018;
}

.nav { display: flex; gap: 1.2rem; color: var(--muted); font-size: .95rem; }
.nav a:hover, .footer a:hover { color: var(--text); }
.nav-cta {
  padding: .65rem 1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
}

.section-shell { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: 1.08fr .92fr; gap: 3rem; align-items: center; padding: 7rem 0 5rem; }
.eyebrow { color: var(--accent); font-weight: 800; text-transform: uppercase; letter-spacing: .13em; font-size: .78rem; }
h1 { font-size: clamp(3.25rem, 8vw, 6.8rem); line-height: .9; margin: 1rem 0 1.25rem; letter-spacing: -.07em; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1; margin: .75rem 0 1rem; letter-spacing: -.045em; }
h3 { margin: 0 0 .7rem; }
.hero-lede { font-size: 1.2rem; max-width: 49rem; }

.hero-actions, .trust-row, .start-links { display: flex; flex-wrap: wrap; gap: .85rem; align-items: center; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .95rem 1.2rem;
  border-radius: 999px;
  font-weight: 800;
}
.button.primary { color: #061019; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.button.secondary { border: 1px solid var(--line); background: var(--panel); }
.trust-row { margin-top: 1.6rem; color: var(--muted); font-size: .92rem; }
.trust-row span { border: 1px solid var(--line); border-radius: 999px; padding: .45rem .7rem; background: rgba(255,255,255,.04); }

.hero-card, .feature-band, .start-section {
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: linear-gradient(180deg, var(--panel-strong), rgba(255,255,255,.045));
  box-shadow: var(--shadow);
}
.hero-card { padding: 1rem; transform: rotate(1.4deg); }
.card-toolbar { display: flex; align-items: center; gap: .45rem; color: var(--muted); padding: .4rem .3rem 1rem; }
.card-toolbar span { width: .72rem; height: .72rem; border-radius: 50%; background: var(--line); }
.card-toolbar strong { margin-left: .5rem; font-size: .86rem; }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: .7rem; }
.metric-grid div { background: rgba(0,0,0,.18); border: 1px solid var(--line); border-radius: 1.1rem; padding: 1rem; }
.metric-grid b { display: block; font-size: 1.3rem; }
.metric-grid span, .status-line { color: var(--muted); font-size: .82rem; }
.scroll-demo { margin-top: 1rem; display: grid; gap: .65rem; }
.row { display: flex; justify-content: space-between; align-items: center; padding: .9rem 1rem; border-radius: 1rem; background: rgba(255,255,255,.08); border: 1px solid var(--line); }
.row.tall { min-height: 5.2rem; }
.row.medium { min-height: 3.5rem; }
.row em { color: var(--accent); font-style: normal; }
.status-line { margin: 1rem .25rem .25rem; }

.split-section { display: grid; grid-template-columns: .9fr 1.1fr; gap: 2rem; padding: 4rem 0; }
.problem-grid, .benchmark-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.problem-grid article, .benchmark-grid article, .demo-card {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: var(--panel);
  padding: 1.3rem;
}

.feature-band { display: grid; grid-template-columns: .95fr 1.05fr; gap: 2rem; padding: 2rem; margin-top: 2rem; margin-bottom: 5rem; }
.feature-copy p { max-width: 36rem; }
.feature-list { display: grid; gap: .8rem; }
.feature-list div { display: grid; gap: .3rem; padding: 1rem; background: rgba(0,0,0,.18); border: 1px solid var(--line); border-radius: 1rem; }
.feature-list span { color: var(--muted); }

.section-heading { max-width: 760px; margin-bottom: 1.5rem; }
.section-heading.narrow { max-width: 690px; text-align: center; margin-inline: auto; }
.demo-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.demo-card { min-height: 14rem; display: flex; flex-direction: column; justify-content: space-between; transition: transform .18s ease, border-color .18s ease; }
.demo-card:hover { transform: translateY(-4px); border-color: rgba(120,243,210,.55); }
.tag { align-self: flex-start; color: #061019; background: var(--accent); border-radius: 999px; padding: .35rem .6rem; font-size: .78rem; font-weight: 800; }
.demo-card strong { color: var(--accent); }

.framework-section, .benchmark-section { padding: 5rem 0 0; }
.framework-table { border: 1px solid var(--line); border-radius: 1.5rem; overflow: hidden; background: var(--panel); }
.framework-table > div { display: grid; grid-template-columns: 1.05fr 1.4fr .55fr; gap: 1rem; padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); }
.framework-table > div:last-child { border-bottom: 0; }
.table-head { color: var(--accent); font-weight: 800; background: rgba(255,255,255,.05); }
.framework-table span:nth-child(2) { color: var(--muted); }

.benchmark-grid { margin-top: 1.5rem; }
.start-section { display: grid; grid-template-columns: 1fr .9fr; gap: 2rem; align-items: center; padding: 2rem; margin-top: 5rem; margin-bottom: 4rem; }
.code-card { background: #02050a; border: 1px solid var(--line); border-radius: 1.2rem; padding: 1rem; overflow: hidden; }
pre { overflow-x: auto; margin: 0 0 1rem; color: var(--accent); }
.start-links a { color: var(--text); border-bottom: 1px solid var(--accent); }
.footer { display: flex; justify-content: center; gap: 1.2rem; padding: 2rem; color: var(--muted); border-top: 1px solid var(--line); }

@media (max-width: 920px) {
  .nav { display: none; }
  .hero, .split-section, .feature-band, .start-section { grid-template-columns: 1fr; }
  .demo-grid, .problem-grid, .benchmark-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding-top: 4rem; }
}

@media (max-width: 640px) {
  .demo-grid, .problem-grid, .benchmark-grid, .metric-grid { grid-template-columns: 1fr; }
  .framework-table > div { grid-template-columns: 1fr; }
  .nav-cta { display: none; }
  h1 { font-size: 3.3rem; }
}