:root {
  --bg: #fafaf5; --surface: #f1f1e9; --text: #1b1c18; --muted: #55594f;
  --primary: #2e6b3a; --line: #d9dccf;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121410; --surface: #1c1f1a; --text: #e3e3dc; --muted: #b4b8ab; --primary: #98d4a1; --line: #343830; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header.site { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
header.site a { color: var(--text); text-decoration: none; font-weight: 600; font-size: 20px; }
.leaf { width: 32px; height: 32px; }
h1 { font-size: 32px; line-height: 1.25; margin: 8px 0 4px; }
h2 { font-size: 22px; margin: 36px 0 8px; padding-top: 12px; border-top: 1px solid var(--line); }
h3 { font-size: 18px; margin: 20px 0 4px; }
.updated { color: var(--muted); margin: 0 0 24px; }
a { color: var(--primary); }
.card { background: var(--surface); border-radius: 16px; padding: 16px 20px; margin: 16px 0; }
.card > :first-child { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.wrap { overflow-x: auto; }
footer { color: var(--muted); font-size: 14px; margin-top: 48px; }
.buttons { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.button { background: var(--primary); color: var(--bg); padding: 10px 18px; border-radius: 999px; text-decoration: none; font-weight: 600; }
blockquote { background: var(--surface); border-radius: 16px; padding: 4px 20px; margin: 16px 0; }
pre { background: var(--surface); border-radius: 12px; padding: 12px 16px; overflow-x: auto; font-size: 14px; }
nav.lang { margin-left: auto; font-size: 14px; color: var(--muted); }
nav.lang a { font-weight: 400; font-size: 14px; }
.note { color: var(--muted); font-size: 14px; }