:root {
  --bg: #0a0b10;
  --panel: #12141c;
  --ink: #e6e9f0;
  --ink-dim: #9aa3b2;
  --rule: #22262f;
  --accent: #a78bfa;
  --accent-dim: #7c6ad8;
  --good: #4ade80;
  --bad: #f87171;
  --warn: #fbbf24;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Inter', system-ui, sans-serif;
  --serif: 'Source Serif 4', Georgia, serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body {
  background:
    radial-gradient(80% 50% at 20% 0%, rgba(167, 139, 250, 0.08) 0%, transparent 60%),
    radial-gradient(70% 50% at 90% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 60%),
    var(--bg);
  min-height: 100vh;
}
main {
  max-width: 820px;
  margin: 0 auto;
  padding: 80px 28px 120px;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}
h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 52px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}
h1 .accent { color: var(--accent); }
.lede {
  font-size: 19px;
  color: var(--ink-dim);
  max-width: 720px;
  margin: 0 0 56px;
}
code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--panel);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--rule);
}

/* --- Live bit stream --- */
.live {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.live::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.05) 0%, transparent 40%);
  pointer-events: none;
}
.live-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 14px;
}
.live-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.live-status {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--good);
}
.live-status.off { color: var(--bad); }
.bit-stream {
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--accent);
  word-break: break-all;
  min-height: 90px;
  letter-spacing: 2px;
}
.live-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-dim);
  margin-top: 12px;
}
.section-note {
  font-size: 14px;
  color: var(--ink-dim);
  margin: 18px 0 0;
  line-height: 1.55;
}

/* --- Fun cards (coin / dice / download) --- */
.fun {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
  margin-bottom: 56px;
}
@media (max-width: 700px) { .fun { grid-template-columns: 1fr; } }
.fun-card {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 22px 20px;
  text-align: center;
}
.fun-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 12px;
}
.fun-value {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 48px;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 18px;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fun-value.small { font-size: 18px; font-weight: 500; }
.fun-value a { color: var(--accent); text-decoration: none; }
.fun-value a:hover { text-decoration: underline; }
.fun-btn {
  background: var(--accent);
  color: #0a0b10;
  border: none;
  border-radius: 8px;
  padding: 10px 24px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s;
}
.fun-btn:hover { background: var(--accent-dim); color: white; }
.fun-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.fun-note {
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 14px;
  line-height: 1.5;
  text-align: left;
}

/* --- Sections --- */
section { margin: 56px 0; }
h2 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}
p { font-size: 17px; color: var(--ink); margin: 0 0 18px; }
p.dim { color: var(--ink-dim); }

/* --- NIST table --- */
table.nist {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 14px;
  margin-top: 10px;
}
table.nist th, table.nist td {
  padding: 12px 18px;
  text-align: left;
  border-bottom: 1px solid var(--rule);
}
table.nist tr:last-child td { border-bottom: none; }
table.nist th {
  color: var(--ink-dim);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 11px;
}
.result-pass { color: var(--good); font-weight: 600; }
.result-fail { color: var(--bad); font-weight: 600; }
.nist-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-dim);
  margin-top: 14px;
}

/* --- Footer --- */
footer {
  margin-top: 100px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  color: var(--ink-dim);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  main { padding: 56px 20px 100px; }
  h1 { font-size: 38px; }
  .live { padding: 20px; }
  .bit-stream { font-size: 15px; letter-spacing: 1px; }
}