:root {
  color-scheme: dark;
  --text: rgba(235, 255, 240, 0.95);
  --muted: rgba(215, 245, 220, 0.68);
  --accent: rgba(159, 255, 184, 0.95);
  --border: rgba(210, 255, 220, 0.16);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 15%, rgba(42, 73, 49, 0.35), transparent 28%),
    radial-gradient(circle at 82% 78%, rgba(44, 63, 49, 0.35), transparent 34%),
    #07100b;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

article { margin-top: 36px; }

h1 {
  margin: 0 0 4px;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  line-height: 1.25;
}

h2 {
  margin: 2rem 0 0.35rem;
  font-size: 1.1rem;
}

p { margin: 0.55rem 0; }

a { color: var(--accent); }

.back {
  display: inline-block;
  text-decoration: none;
}

.back:hover { text-decoration: underline; }

.updated {
  margin-bottom: 1.6rem;
  color: var(--muted);
  font-size: 0.9rem;
}

hr {
  margin: 56px 0;
  border: 0;
  border-top: 1px solid var(--border);
}

@media (max-width: 560px) {
  main {
    width: min(100% - 24px, 760px);
    padding-top: 28px;
  }
}