:root {
  /* matched to the app's design tokens (frontend/src/theme.css) — Traktor-style deep
     near-black chrome with a single electric-blue brand accent, cyan for streaming. */
  --bg: #0c0c0e;
  --bg-2: #131316;
  --panel: #1e1e22;
  --panel-2: #151518;
  --fg: #eef0f3;
  --muted: #9498a2;
  --faint: #686c76;
  --accent: #18b4e8;
  --accent-glow: #4fcdf6;
  --accent-deep: #0e8fc0;
  --accent-rgb: 24, 180, 232;
  --stream: #28e0ff;
  --hair: rgba(255, 255, 255, 0.08);
  --hair-strong: rgba(255, 255, 255, 0.15);
  --display: "Space Grotesk", system-ui, sans-serif;
  --ui: "Hanken Grotesk", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  background: radial-gradient(1100px 620px at 50% -12%, #10212b 0%, var(--bg) 62%);
  color: var(--fg);
  font-family: var(--ui);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
.mono { font-family: var(--mono); }
a { color: inherit; text-decoration: none; }

.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px; backdrop-filter: blur(10px);
  background: rgba(12, 12, 14, 0.72); border-bottom: 1px solid var(--hair);
}
.brand { display: flex; align-items: center; gap: 9px; font-family: var(--display); font-weight: 600; font-size: 18px; }
.nav-links { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--fg); }
.nav-links .gh { color: var(--accent-glow); }

main { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.hero { text-align: center; padding: 80px 0 40px; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin: 0 0 18px; }
.hero h1 { font-family: var(--display); font-weight: 700; font-size: clamp(34px, 6vw, 60px); line-height: 1.05; letter-spacing: -0.03em; margin: 0 auto 20px; max-width: 18ch; }
.hero h1 .accent { color: var(--accent); }
.hero .sub { color: var(--muted); font-size: 18px; max-width: 60ch; margin: 0 auto 30px; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 10px; font-weight: 600; font-size: 15px; border: 1px solid var(--hair); transition: transform 0.12s ease, box-shadow 0.12s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: linear-gradient(180deg, var(--accent-glow), var(--accent-deep)); color: #04141b; border: none; box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.32); }
.btn-secondary { background: var(--panel); color: var(--fg); box-shadow: none; opacity: 0.85; }
.btn-secondary:hover { opacity: 1; }
.btn-ghost { background: transparent; color: var(--muted); }
.btn .os { font-size: 17px; }
.note { color: var(--muted); font-size: 12px; margin-top: 18px; }

.shot { margin: 24px 0 70px; border-radius: 14px; overflow: hidden; border: 1px solid var(--hair); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6); }
.shot img { display: block; width: 100%; }

/* trust strip — open-source / Rust core / honest, the things the closed apps can't say */
.trust { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; padding: 0 0 64px; }
.trust div { text-align: center; padding: 0 12px; }
.trust .k { font-family: var(--display); font-weight: 600; font-size: 16px; margin: 0 0 4px; }
.trust .k span { color: var(--accent); }
.trust p { color: var(--muted); font-size: 13px; margin: 0; }

.section-head { text-align: center; max-width: 60ch; margin: 0 auto 36px; }
.section-head h2 { font-family: var(--display); font-weight: 700; font-size: clamp(24px, 4vw, 34px); letter-spacing: -0.02em; margin: 0 0 10px; }
.section-head p { color: var(--muted); font-size: 15px; margin: 0; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; padding-bottom: 80px; }
.features article { background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--hair); border-radius: 12px; padding: 22px; transition: border-color 0.15s ease, transform 0.15s ease; }
.features article:hover { border-color: var(--hair-strong); transform: translateY(-2px); }
.features .ic { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.08em; margin: 0 0 12px; }
.features h3 { font-family: var(--display); font-weight: 600; font-size: 17px; margin: 0 0 8px; }
.features p { color: var(--muted); font-size: 14px; margin: 0; }

.foot { border-top: 1px solid var(--hair); padding: 28px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; max-width: 1080px; margin: 0 auto; }
.foot-brand { display: flex; align-items: center; gap: 8px; font-family: var(--display); font-weight: 600; }
.foot-links { display: flex; gap: 18px; align-items: center; color: var(--muted); font-size: 13px; flex-wrap: wrap; }
.foot-links a:hover { color: var(--fg); }

/* beta badge — small pill used in the nav + hero */
.badge-beta { font-family: var(--mono); font-size: 10px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-glow); background: rgba(var(--accent-rgb), 0.14); border: 1px solid rgba(var(--accent-rgb), 0.4); border-radius: 999px; padding: 2px 8px; vertical-align: middle; }

/* callout / notice box (beta status, install warnings) */
.notice { border: 1px solid var(--hair-strong); background: var(--panel-2); border-left: 3px solid var(--accent); border-radius: 10px; padding: 14px 18px; margin: 18px 0; }
.notice.warn { border-left-color: #ffb020; }
.notice h4 { font-family: var(--display); font-weight: 600; font-size: 14px; margin: 0 0 6px; }
.notice p, .notice li { color: var(--muted); font-size: 14px; margin: 4px 0; }

/* document pages (manual, privacy) */
.doc { max-width: 820px; margin: 0 auto; padding: 40px 24px 80px; }
.doc .doc-title { font-family: var(--display); font-weight: 700; font-size: clamp(28px, 5vw, 40px); letter-spacing: -0.02em; margin: 0 0 6px; }
.doc .doc-meta { color: var(--faint); font-family: var(--mono); font-size: 12px; margin: 0 0 28px; }
.doc h2 { font-family: var(--display); font-weight: 600; font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 12px; padding-top: 12px; border-top: 1px solid var(--hair); scroll-margin-top: 80px; }
.doc h3 { font-family: var(--display); font-weight: 600; font-size: 16px; margin: 22px 0 8px; color: var(--fg); }
.doc p, .doc li { color: var(--muted); font-size: 15px; }
.doc ul { padding-left: 20px; margin: 8px 0; }
.doc li { margin: 5px 0; }
.doc a { color: var(--accent-glow); }
.doc a:hover { text-decoration: underline; }
.doc strong { color: var(--fg); font-weight: 600; }
.doc code { font-family: var(--mono); font-size: 13px; background: var(--surface, var(--panel)); color: var(--accent-glow); padding: 1px 5px; border-radius: 4px; border: 1px solid var(--hair); }
.doc .key { display: inline-block; font-family: var(--mono); font-size: 12px; color: var(--fg); background: var(--panel); border: 1px solid var(--hair-strong); border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px; }

/* table of contents */
.toc { background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid var(--hair); border-radius: 12px; padding: 18px 22px; margin: 0 0 8px; }
.toc h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin: 0 0 10px; }
.toc ol { columns: 2; column-gap: 28px; margin: 0; padding-left: 18px; }
.toc li { color: var(--muted); font-size: 14px; margin: 3px 0; }
.toc a { color: var(--muted); }
.toc a:hover { color: var(--accent-glow); }
@media (max-width: 560px) { .toc ol { columns: 1; } }

/* hamburger toggle — hidden on desktop, shown on mobile (see media query) */
.nav-burger { display: none; flex-direction: column; gap: 5px; align-items: center; justify-content: center; width: 40px; height: 40px; padding: 0; background: transparent; border: 1px solid var(--hair); border-radius: 9px; cursor: pointer; }
.nav-burger span { display: block; width: 18px; height: 2px; background: var(--fg); border-radius: 2px; transition: opacity 0.15s ease; }
.nav-burger:hover { border-color: var(--hair-strong); }

/* ---- mobile ---------------------------------------------------------------- */
@media (max-width: 640px) {
  body { overflow-x: hidden; }
  .nav { padding: 12px 16px; position: relative; }
  .brand { font-size: 16px; gap: 7px; }
  /* show the burger; turn the link list into a dropdown panel under the bar */
  .nav-burger { display: inline-flex; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(12, 12, 14, 0.98); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hair); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    padding: 4px 0; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 20px; font-size: 15px; color: var(--fg); border-top: 1px solid var(--hair); }
  .nav-links a:first-child { border-top: 0; }
  .nav-links .gh { color: var(--accent-glow); }
  .hero { padding: 52px 0 28px; }
  .eyebrow { font-size: 10px; letter-spacing: 0.08em; }
  .hero .sub { font-size: 16px; }
  .cta { flex-direction: column; align-items: stretch; }
  .cta .btn { width: 100%; justify-content: center; }
  .features, .trust { grid-template-columns: 1fr; }
  .doc { padding: 28px 18px 64px; }
}