/* NimRTC wasm-demo landing page */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --bg-soft-2: #eaeef2;
  --fg: #1f2328;
  --fg-muted: #57606a;
  --fg-faint: #8c959f;
  --border: #d0d7de;
  --border-soft: #e5e9ed;
  --accent: #0969da;
  --accent-soft: #ddf4ff;
  --accent-strong: #0550ae;
  --ok: #1a7f37;
  --warn: #9a6700;
  --err: #cf222e;
  --code-bg: #f6f8fa;
  --shadow: 0 1px 0 rgba(31, 35, 40, 0.04);
  --maxw: 1024px;
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-soft: #161b22;
    --bg-soft-2: #1c2128;
    --fg: #e6edf3;
    --fg-muted: #9198a1;
    --fg-faint: #6e7681;
    --border: #30363d;
    --border-soft: #21262d;
    --accent: #58a6ff;
    --accent-soft: #0c2d6b;
    --accent-strong: #79c0ff;
    --ok: #3fb950;
    --warn: #d29922;
    --err: #f85149;
    --code-bg: #161b22;
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
               Helvetica, Arial, sans-serif, "Apple Color Emoji",
               "Segoe UI Emoji";
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas,
               "Liberation Mono", "Courier New", monospace;
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 4px;
}

pre code {
  background: transparent;
  padding: 0;
  font-size: 13.5px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  overflow-x: auto;
  margin: 12px 0;
  line-height: 1.55;
}

.muted { color: var(--fg-muted); }
.small { font-size: 13px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border-soft);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(13, 17, 23, 0.85); }
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 17px;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14.5px;
}
.nav-links a { color: var(--fg-muted); }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* Hero */
.hero {
  padding: 80px 0 56px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  border-bottom: 1px solid var(--border-soft);
}
.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
}
h1 {
  font-size: 40px;
  line-height: 1.18;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 0 0 28px;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14.5px;
  font-weight: 500;
  border: 1px solid var(--border);
  color: var(--fg);
  background: var(--bg);
  transition: background 0.12s, border-color 0.12s;
}
.btn:hover { background: var(--bg-soft-2); text-decoration: none; }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn.primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--accent); }

.hero-numbers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.hero-numbers li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 18px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.hero-numbers b {
  font-size: 22px;
  font-weight: 600;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}
.hero-numbers span {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.45;
}
@media (max-width: 720px) {
  .hero-numbers { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 30px; }
  .hero { padding: 48px 0 40px; }
}

/* Section base */
section { padding: 64px 0; }
section + section { border-top: 1px solid var(--border-soft); }
h2 {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}
h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 24px 0 10px;
}
.section-lead {
  color: var(--fg-muted);
  font-size: 16px;
  max-width: 720px;
  margin: 0 0 24px;
}

/* Demo */
.demo { background: var(--bg-soft); }
.demo [data-asciicast] { margin: 24px 0; }
.cast-caption {
  font-size: 13.5px;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 8px 0 0;
}

/* Quick start */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}
.steps > li {
  position: relative;
  padding: 0 0 22px 36px;
  counter-increment: step;
}
.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 26px; height: 26px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}
.step-title {
  font-weight: 600;
  margin-bottom: 4px;
}
.step-expected {
  font-size: 13.5px;
  color: var(--fg-muted);
  margin-top: 6px;
}

/* Status */
.status .grid.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
@media (max-width: 720px) {
  .status .grid.two { grid-template-columns: 1fr; }
}
ul.check, ul.cross, ul.bullet {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
ul.check li, ul.cross li, ul.bullet li {
  position: relative;
  padding: 6px 0 6px 26px;
  font-size: 14.5px;
  line-height: 1.55;
}
ul.check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--ok);
  font-weight: 700;
}
ul.cross li::before {
  content: "✗";
  position: absolute;
  left: 0;
  color: var(--err);
  font-weight: 700;
}
ul.bullet li::before {
  content: "•";
  position: absolute;
  left: 6px;
  color: var(--accent);
  font-weight: 700;
}

/* Arch */
.arch-diagram {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
  margin: 0 0 12px;
}
.arch-note {
  font-size: 14.5px;
  color: var(--fg-muted);
  max-width: 720px;
  margin: 0;
}

/* Roadmap */
.roadmap p {
  max-width: 720px;
  margin: 0 0 12px;
  font-size: 15.5px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 32px 0 48px;
  background: var(--bg-soft);
  font-size: 14px;
  color: var(--fg-muted);
}
.site-footer p { margin: 4px 0; }