:root {
  color-scheme: dark;
  --bg: #080a0a;
  --surface: #111715;
  --border: #202724;
  --text: #f3f7f5;
  --muted: #929c97;
  --accent: #31e6a1;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  padding: 48px 20px;
  color: var(--text);
  background: radial-gradient(circle at 50% -10%, rgba(49, 230, 161, 0.09), transparent 35rem), var(--bg);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

main {
  width: min(100%, 720px);
  margin: 0 auto;
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(17, 23, 21, 0.82);
}

.back, a { color: var(--accent); }
.back { font-size: 14px; text-decoration: none; }
.back:hover, a:hover { text-decoration: underline; }

h1 {
  margin: 28px 0 0;
  font-size: clamp(38px, 7vw, 58px);
  line-height: 1;
  letter-spacing: -0.045em;
}

.updated { margin: 12px 0 34px; color: var(--muted); font-size: 13px; }
h2 { margin: 30px 0 8px; font-size: 18px; }
p { margin: 0; color: #c4cdc8; }

@media (max-width: 560px) {
  body { padding: 20px 14px; }
  main { padding: 24px 20px; }
}