:root {
  --bg: #ffffff;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --accent: #5e3bd8;
  --card: #f5f5f7;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f5f5f7;
    --muted: #98989d;
    --line: #2c2c2e;
    --accent: #a58cff;
    --card: #1c1c1e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

header a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

h1 { font-size: 34px; line-height: 1.15; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 36px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 4px; }

p, li { color: var(--text); }
.lede { font-size: 20px; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }

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

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px 22px;
  margin: 24px 0;
}

.card p:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }

ul { padding-left: 22px; }

footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer a { color: var(--muted); }
footer nav { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }