:root {
  --bg: #f4f4f6;
  --surface: #ffffff;
  --text: #1c1c1e;
  --text-sub: #6e6e73;
  --accent: #10b981;
  --border: rgba(0, 0, 0, 0.08);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101013;
    --surface: #1c1c20;
    --text: #f2f2f5;
    --text-sub: #98989f;
    --accent: #34d399;
    --border: rgba(255, 255, 255, 0.1);
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}
.wrap { max-width: 680px; margin: 0 auto; padding: 32px 20px 64px; }
header.site { display: flex; align-items: center; gap: 10px; padding: 8px 0 32px; }
header.site .logo {
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
}
header.site .logo svg { width: 16px; height: 16px; fill: #fff; }
header.site a.name { font-size: 16px; font-weight: 700; color: var(--text); text-decoration: none; }
header.site nav { margin-left: auto; display: flex; gap: 16px; }
header.site nav a { font-size: 14px; color: var(--text-sub); text-decoration: none; }
header.site nav a:hover { color: var(--accent); }
h1 { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 8px; }
p.lead { font-size: 16px; color: var(--text-sub); margin-bottom: 32px; }
section.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
}
section.card h2 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
section.card h3 { font-size: 15px; font-weight: 700; margin: 20px 0 6px; }
section.card p, section.card li { font-size: 15px; color: var(--text); }
section.card p + p { margin-top: 10px; }
section.card ul { padding-left: 20px; margin: 8px 0; }
section.card li { margin: 4px 0; }
section.card .sub { color: var(--text-sub); font-size: 13.5px; }
a.inline { color: var(--accent); text-decoration: none; }
a.inline:hover { text-decoration: underline; }
.meta { font-size: 13px; color: var(--text-sub); margin-top: 24px; }
.btn {
  display: inline-block; margin-top: 8px;
  background: var(--accent); color: #fff;
  font-size: 15px; font-weight: 600;
  padding: 12px 20px; border-radius: 12px; text-decoration: none;
}
footer.site { margin-top: 40px; font-size: 13px; color: var(--text-sub); }
footer.site a { color: var(--text-sub); }
table.plain { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: 14px; }
table.plain th, table.plain td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
table.plain th { color: var(--text-sub); font-weight: 600; white-space: nowrap; }