:root {
  --bg: #f4f5f7;
  --fg: #12141a;
  --muted: #5c6370;
  --card: #fff;
  --line: #e4e6eb;
  --accent: #0b5fff;
  --max: 42rem;
}
html[data-theme="dark"] {
  --bg: #0c0e12;
  --fg: #eef0f4;
  --muted: #9aa3b2;
  --card: #151922;
  --line: #2a3140;
  --accent: #6b9bff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  font-size: 1.05rem;
}
a { color: var(--accent); text-decoration-thickness: 1px; }
a:hover { text-decoration: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.brand img { width: 28px; height: 28px; }
nav a { margin-left: 0.9rem; font-size: 0.92rem; color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--fg); }
h1 { font-size: 1.85rem; line-height: 1.25; letter-spacing: -0.03em; margin: 0 0 0.75rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; letter-spacing: -0.02em; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 0.95rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  margin: 1.25rem 0;
}
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}
pre {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
}
ul { padding-left: 1.2rem; }
.list a { font-weight: 600; text-decoration: none; }
.list li { margin: 0.75rem 0; }
footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}