:root {
  --bg: #07090e;
  --panel: #0d111a;
  --line: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #06b6d4;
  --accent-ink: #062a33;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
a { color: var(--accent); }
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.8rem 1.5rem;
  background: rgba(7, 9, 14, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.brand { color: var(--text); text-decoration: none; font-weight: 800; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.7rem; height: 1.7rem; margin-right: 0.5rem;
  background: var(--accent); color: var(--accent-ink);
  border-radius: 0.5rem; font-weight: 900;
}
.nav nav { display: flex; gap: 1.1rem; align-items: center; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.nav nav a:hover { color: var(--text); }
.nav-cta {
  border: 1px solid var(--accent); border-radius: 999px;
  padding: 0.25rem 0.9rem !important; color: var(--accent) !important;
}
main { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }
.hero {
  display: grid; grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem; align-items: center; padding: 4rem 0 3rem;
}
.kicker {
  color: var(--accent); font-weight: 700; font-size: 0.85rem;
  text-transform: uppercase; letter-spacing: 0.08em;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1.1; margin: 0.5rem 0 1rem; }
.accent { color: var(--accent); }
.lede { color: var(--muted); font-size: 1.1rem; max-width: 34rem; }
.cta-row { display: flex; gap: 0.8rem; margin: 1.6rem 0; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 0.75rem 1.5rem; border-radius: 0.8rem;
  text-decoration: none; font-weight: 700;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.ghost { border: 1px solid var(--line); color: var(--text); }
.ticks { list-style: none; padding: 0; color: var(--muted); }
.ticks li { padding-left: 1.6rem; position: relative; margin: 0.3rem 0; }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
.hero-phone { display: flex; justify-content: center; }
.phone {
  width: 240px; border: 1px solid var(--line); border-radius: 2rem;
  background: var(--panel); padding: 1rem; box-shadow: 0 20px 60px rgba(6, 182, 212, 0.12);
}
.phone-bar {
  display: flex; justify-content: space-between; font-size: 0.75rem;
  font-weight: 800; color: var(--accent); margin-bottom: 0.8rem;
}
.phone-bar .lat { color: var(--muted); font-weight: 400; }
.phone-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
.phone-grid span {
  aspect-ratio: 1; border-radius: 0.9rem;
  background: linear-gradient(135deg, #141b29, #1e293b);
  border: 1px solid var(--line);
}
.phone-stream {
  margin-top: 0.8rem; border-radius: 0.9rem; background: #000;
  border: 1px solid var(--line); text-align: center; padding: 1.4rem 0.5rem;
}
.phone-stream .play { font-size: 1.6rem; color: var(--accent); }
.phone-stream p { font-size: 0.7rem; color: var(--muted); margin: 0.3rem 0 0; }
.section { padding: 3rem 0; border-top: 1px solid var(--line); }
.section h2 { font-size: 1.8rem; margin: 0 0 0.3rem; }
.section-sub { color: var(--muted); margin-top: 0; }
.steps { list-style: none; padding: 0; display: grid; gap: 1rem; }
.steps.mini { grid-template-columns: repeat(3, 1fr); }
.steps li {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 1rem; padding: 1.1rem 1.3rem;
}
.steps strong { display: block; margin-bottom: 0.2rem; }
.steps span, .steps code { color: var(--muted); font-size: 0.95rem; }
.diagram, .code {
  background: #04060a; border: 1px solid var(--line); border-radius: 1rem;
  padding: 1.2rem; overflow-x: auto; font-size: 0.85rem; color: #a5f3fc;
}
.code { color: var(--text); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.cards article {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 1rem; padding: 1.2rem;
}
.cards h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.cards p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.contribute {
  border: 1px solid var(--accent); border-radius: 1.2rem;
  padding: 2rem; background: linear-gradient(180deg, rgba(6,182,212,0.07), transparent);
}
footer {
  border-top: 1px solid var(--line); margin-top: 2rem;
  padding: 1.5rem; text-align: center; color: var(--muted); font-size: 0.9rem;
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero-phone { display: none; }
  .cards, .steps.mini { grid-template-columns: 1fr; }
  .nav nav a:not(.nav-cta):not(:last-child) { display: none; }
}