:root {
  --bg: #fafaf7;
  --fg: #1a1a1a;
  --muted: #5b5b5b;
  --card: #ffffff;
  --border: #e5e3dc;
  --accent: #c15f3c;
  --code-bg: #f3f0ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --fg: #ececec;
    --muted: #9a9a9a;
    --card: #1c1e25;
    --border: #2c2f38;
    --accent: #e08a6a;
    --code-bg: #1f2026;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
header h1 {
  font-size: 2rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
header p.lede {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 1.05rem;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  margin: 0 0 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.site-nav a { color: var(--accent); text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }
.site-nav a.active { color: var(--fg); font-weight: 600; }

.tip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 0 0 16px;
}
.tip h3 { font-size: 1.08rem; margin: 0 0 6px; letter-spacing: -0.005em; }
.tip p { margin: 0 0 8px; }
.tip p:last-child { margin-bottom: 0; }
.tip .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.88em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
section { margin: 0 0 40px; }
section > h2 {
  font-size: 1.35rem;
  margin: 0 0 12px;
  letter-spacing: -0.005em;
}
footer {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 56px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}
footer a { color: var(--muted); }