:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1b2a3b;
  --muted: #5b6b7d;
  --line: #e3e8ef;
  --brand: #0e7490;
  --brand-dark: #0b5c72;
  --accent: #f59e0b;
  --danger: #b42318;
  --ok: #067647;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.55; }
a { color: var(--brand); }
main { max-width: 960px; margin: 0 auto; padding: 24px 20px 48px; }
header.top { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; background: var(--card); border-bottom: 1px solid var(--line); }
header.top .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: 18px; }
header.top .brand img { border-radius: 50%; }
header.top .brand b { color: var(--brand); font-weight: 700; }
header.top nav { font-size: 14px; color: var(--muted); }
footer { max-width: 960px; margin: 0 auto; padding: 24px 20px 40px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 0 0 12px; }
.lead { font-size: 17px; color: var(--muted); }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px; margin-bottom: 24px; }
.hero .illustration { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--line); }
.steps { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px 32px; }
.steps ol { padding-left: 20px; margin: 0; }
.steps li { margin: 8px 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; margin-bottom: 20px; }
.card.danger { border-color: #f3c7c1; }
.prose h2 { margin-top: 24px; }
.button { display: inline-block; background: var(--brand); color: #fff; border: 0; border-radius: 10px; padding: 12px 20px; font-size: 16px; font-weight: 600; text-decoration: none; cursor: pointer; }
.button:hover { background: var(--brand-dark); }
.button.secondary { background: #fff; color: var(--danger); border: 1px solid #f3c7c1; }
button.link { background: none; border: 0; padding: 0; color: var(--brand); text-decoration: underline; cursor: pointer; font: inherit; }
form.inline { display: inline; }
.hint { color: var(--muted); font-size: 14px; }
.muted { color: var(--muted); }
.alert { background: #fef3f2; border: 1px solid #f3c7c1; color: var(--danger); padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; }
.notice { background: #ecfdf3; border: 1px solid #abefc6; color: var(--ok); padding: 12px 16px; border-radius: 10px; margin-bottom: 16px; }
form.send label { display: block; font-weight: 600; margin: 12px 0 4px; }
form.send input, form.send select { width: 100%; max-width: 640px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 15px; }
form.send .button { margin-top: 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.state { display: inline-block; padding: 2px 10px; border-radius: 999px; background: #eef2f6; font-size: 13px; }
.state-joined_recording, .state-joined_not_recording, .state-ended { background: #ecfdf3; color: var(--ok); }
.state-waiting_room, .state-joining, .state-requested { background: #fffaeb; color: #b54708; }
.state-fatal_error { background: #fef3f2; color: var(--danger); }
.transcript { list-style: none; padding: 0; margin: 0; max-height: 60vh; overflow: auto; }
.transcript li { padding: 6px 0; border-bottom: 1px dashed var(--line); }
.transcript time { color: var(--muted); font-variant-numeric: tabular-nums; margin-right: 8px; font-size: 13px; }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding: 20px; }
  h1 { font-size: 24px; }
  header.top { flex-direction: column; align-items: flex-start; }
}