:root {
  color-scheme: light dark;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --bg: #fff;
  --border: #d4d4d4;
  --link: #0969da;
  --th-bg: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8e8;
    --muted: #a8a8a8;
    --bg: #0d1117;
    --border: #30363d;
    --link: #6eb6ff;
    --th-bg: #161b22;
  }
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.7;
  max-width: 46rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  color: var(--text);
  background: var(--bg);
}

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

header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

header nav { font-size: 0.92rem; }
header nav a { margin-right: 1rem; }

h1 { font-size: 1.6rem; margin: 0 0 0.35rem; }
h2 { font-size: 1.15rem; margin-top: 2.25rem; }
h3 { font-size: 1rem; margin-top: 1.5rem; }

.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
  margin: 0.75rem 0 1rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th { background: var(--th-bg); }

ul, ol { padding-left: 1.35rem; }
li { margin: 0.35rem 0; }

.callout {
  border-left: 3px solid var(--link);
  padding: 0.5rem 0 0.5rem 1rem;
  margin: 1rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

code {
  font-size: 0.88em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--th-bg);
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--muted);
}