:root {
  color-scheme: light dark;
  --bg: #f6f7f4;
  --ink: #17201b;
  --muted: #647067;
  --line: #d7ddd6;
  --panel: #ffffff;
  --accent: #176b5b;
  --accent-ink: #ffffff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 24px 24px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.01em;
}

header .lede {
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.card ol, .card ul {
  padding-left: 22px;
  margin: 8px 0;
}

.card li {
  margin: 6px 0;
}

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

.download-btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  margin-right: 12px;
}

.download-btn:hover {
  filter: brightness(0.95);
}

.version-line {
  color: var(--muted);
  font-size: 13px;
}

code {
  background: var(--line);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}

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

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 24px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161a18;
    --ink: #e6ece8;
    --muted: #9aa49d;
    --line: #2c3330;
    --panel: #1c211e;
    --accent: #43a78f;
    --accent-ink: #0c1310;
  }
}