:root {
  --bg: #0b0d17;
  --bg-2: #11142a;
  --panel: #151935;
  --line: #262b52;
  --text: #e8eaf6;
  --muted: #9aa0c8;
  --violet: #8b5cf6;
  --cyan: #22d3ee;
  --pink: #f472b6;
  --green: #34d399;
  --amber: #fbbf24;
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  margin: 0;
  background:
    radial-gradient(60rem 40rem at 85% -10%, rgba(139, 92, 246, 0.22), transparent 60%),
    radial-gradient(50rem 35rem at -10% 20%, rgba(34, 211, 238, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.92em; background: rgba(139, 92, 246, 0.14); padding: 0.08em 0.35em; border-radius: 5px; }
pre code { background: none; padding: 0; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; }
.mono { font-family: var(--mono); }
.small { font-size: 0.86rem; }
.muted { color: var(--muted); }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.8rem clamp(1rem, 4vw, 3rem);
  background: rgba(11, 13, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(38, 43, 82, 0.6);
}
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--text); font-weight: 700; font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.nav nav { display: flex; gap: clamp(0.6rem, 2vw, 1.4rem); flex-wrap: wrap; justify-content: flex-end; }
.nav nav a { color: var(--muted); font-size: 0.95rem; }
.nav nav a:hover { color: var(--text); text-decoration: none; }
.nav-gh { color: var(--text) !important; }

main, .footer { max-width: 1180px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2rem); }
section { padding: clamp(3rem, 7vw, 5.5rem) 0 0; }
.section-head { margin-bottom: 1.6rem; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 0 0 0.4rem; }
.section-head p { margin: 0; color: var(--muted); }

/* Hero */
.hero {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center;
  padding-top: clamp(3rem, 8vw, 6rem);
}
.eyebrow { color: var(--cyan); font-family: var(--mono); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 1rem; }
.hero h1 { font-size: clamp(2.3rem, 5.6vw, 4rem); margin: 0 0 1.2rem; }
.grad { background: linear-gradient(90deg, var(--violet), var(--cyan) 60%, var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: #c9cdea; max-width: 38rem; margin: 0 0 1.8rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.2rem; list-style: none; padding: 0; margin: 1.6rem 0 0; font-size: 0.9rem; }
.hero-meta a { color: var(--muted); }

.hero-code {
  background: linear-gradient(180deg, rgba(21, 25, 53, 0.95), rgba(13, 16, 36, 0.95));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 30px 80px -30px rgba(139, 92, 246, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
  overflow: hidden;
}
.window-bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); }
.window-bar span { width: 0.7rem; height: 0.7rem; border-radius: 50%; background: #2c3160; }
.window-bar span:nth-child(1) { background: #f87171; }
.window-bar span:nth-child(2) { background: var(--amber); }
.window-bar span:nth-child(3) { background: var(--green); }
.window-bar em { margin-left: auto; color: var(--muted); font: 0.8rem var(--mono); font-style: normal; }

pre {
  margin: 0; padding: 1.1rem 1.2rem; overflow-x: auto;
  font: 0.88rem/1.65 var(--mono); color: #d7dbf5;
}
.tok-k { color: #c4a7ff; }
.tok-s { color: #86efac; }
.tok-c { color: #6b7199; font-style: italic; }
.tok-n { color: var(--amber); }
.tok-t { color: #67e8f9; }

/* Buttons */
.button, button, select {
  font: inherit; font-size: 0.95rem; color: var(--text);
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 0.6rem 1rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.4rem;
  transition: border-color 0.15s, background 0.15s, transform 0.05s;
}
.button:hover, button:hover:not(:disabled), select:hover { border-color: #3a4180; text-decoration: none; }
button:active:not(:disabled) { transform: translateY(1px); }
.button.primary, button.primary {
  background: linear-gradient(90deg, var(--violet), #6d5cf6 50%, #3b82f6); border-color: transparent; color: #fff; font-weight: 600;
}
.button.ghost { background: transparent; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.features article {
  background: linear-gradient(180deg, rgba(21, 25, 53, 0.8), rgba(17, 20, 42, 0.6));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem;
}
.features h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }
.features p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Tabs and panels */
.tabs { display: inline-flex; gap: 0.3rem; padding: 0.3rem; background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; margin-bottom: 1rem; flex-wrap: wrap; }
.tabs button { border: none; background: transparent; color: var(--muted); padding: 0.5rem 0.9rem; }
.tabs button[aria-selected="true"] { background: var(--panel); color: var(--text); box-shadow: 0 0 0 1px var(--line); }
.panel { background: rgba(17, 20, 42, 0.7); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(0.8rem, 2vw, 1.4rem); }
.code-panel pre { background: #0d1024; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 0.8rem; }
.code-panel pre.install { color: var(--green); }

/* Demo */
.stage { position: relative; border-radius: 10px; overflow: hidden; background: #000; border: 1px solid var(--line); aspect-ratio: 16 / 9; }
.stage canvas, .stage video { display: block; width: 100%; height: 100%; object-fit: contain; background: #000; }
.hud { position: absolute; inset: 0.6rem 0.6rem auto 0.6rem; display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; pointer-events: none; }
.hud .mono { background: rgba(0, 0, 0, 0.6); padding: 0.2rem 0.5rem; border-radius: 6px; font-size: 0.8rem; }
.badge {
  font: 600 0.72rem var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.25rem 0.55rem; border-radius: 6px; background: rgba(0, 0, 0, 0.6); color: var(--muted); border: 1px solid rgba(255, 255, 255, 0.12);
}
.badge.exact { color: #052e1c; background: var(--green); border-color: transparent; }
.badge.preview { color: #3b2502; background: var(--amber); border-color: transparent; }
.badge.live { color: #fff; background: rgba(244, 114, 182, 0.85); border-color: transparent; }

.controls { display: grid; grid-template-columns: auto auto auto 1fr auto auto; gap: 0.6rem; align-items: center; margin: 0.9rem 0; }
.controls.wrap { display: flex; flex-wrap: wrap; }
#scrub-play { min-width: 5.5rem; justify-content: center; }
#scrub-mute { min-width: 8.5rem; }
.controls label { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--muted); font-size: 0.9rem; }
.controls label.check { cursor: pointer; }
.controls select { padding: 0.5rem 0.7rem; }

input[type="range"] { width: 100%; accent-color: var(--violet); height: 1.6rem; }
.meter { height: 4px; background: var(--bg-2); border-radius: 4px; overflow: hidden; margin: 0.4rem 0 0.6rem; }
.meter > div { height: 100%; width: 0; background: linear-gradient(90deg, var(--violet), var(--cyan)); transition: width 0.2s; }
.demo-notes p { margin: 0.3rem 0; }
#scrub-status, #record-status { min-height: 1.4em; color: #c9cdea; white-space: pre-wrap; }

.record-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.readback { display: flex; gap: 0.9rem; align-items: center; margin: 0.9rem 0; }
.readback canvas { width: 40%; max-width: 220px; aspect-ratio: 16 / 9; border-radius: 8px; border: 1px solid var(--line); background: #000; flex: none; }
.readback p { margin: 0; color: var(--muted); }

/* Support tables */
.support h3 { margin: 2rem 0 0.8rem; font-size: 1.2rem; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(17, 20, 42, 0.6); }
table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: 0.92rem; }
th, td { text-align: left; vertical-align: top; padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); }
thead th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; background: rgba(21, 25, 53, 0.8); }
tbody th { white-space: nowrap; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: none; }
td { color: #c9cdea; line-height: 1.9; }
.chip { display: inline-block; font: 700 0.66rem/1 var(--mono); letter-spacing: 0.05em; padding: 0.28rem 0.4rem; border-radius: 5px; margin-right: 0.3rem; vertical-align: 0.1em; }
.chip.rust { background: rgba(251, 146, 60, 0.18); color: #fdba74; }
.chip.hw { background: rgba(34, 211, 238, 0.16); color: #67e8f9; }
.chip.os { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }

/* Showcase */
.showcase-card {
  display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: start;
  padding: clamp(1.2rem, 3vw, 2rem); border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.18), rgba(34, 211, 238, 0.08)), var(--panel);
  border: 1px solid var(--line);
}
/* zvid's own mark, in zvid's brand color. */
.showcase-mark { width: 4.5rem; height: 4.5rem; display: grid; place-items: center; }
.showcase-mark svg { width: 100%; height: auto; display: block; }
.showcase-mark path { fill: rgb(178, 130, 255); }
.showcase-card h3 { margin: 0 0 0.5rem; font-size: 1.5rem; }
.showcase-card h3 a { color: var(--text); }
.showcase-card p { color: #c9cdea; margin: 0 0 1.2rem; max-width: 50rem; }

/* Footer */
.footer { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; padding-top: 4rem; padding-bottom: 3rem; margin-top: 4rem; border-top: 1px solid var(--line); }
.footer nav { display: flex; gap: 1.2rem; flex-wrap: wrap; align-items: flex-start; }
.footer nav a { color: var(--muted); }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .record-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav nav a:not(.nav-gh):not([href="#demo"]):not([href="zvidlib/"]) { display: none; }
  .features { grid-template-columns: 1fr; }
  .controls { grid-template-columns: repeat(3, 1fr); }
  .controls input[type="range"] { grid-column: 1 / -1; grid-row: 1; }
  .controls #scrub-random { grid-column: 1 / 3; }
  .showcase-card { grid-template-columns: 1fr; }
  pre { font-size: 0.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (max-width: 640px) {
  .hud .mono { font-size: 0.66rem; }
  .badge { font-size: 0.62rem; }
}