:root {
  --brand: #2e26fb;
  --accent: #3cf5a0;
  --text: #16151c;
  --muted: #5d5b66;
  --line: #e6e5ec;
  --bg: #ffffff;
  --soft: #f5f5fb;
  --todo: #fff3c4;
}
@media (prefers-color-scheme: dark) {
  :root { --text: #ecebf3; --muted: #a9a7b5; --line: #2c2b36; --bg: #121118; --soft: #1b1a24; --todo: #4a3d00; --brand: #8f8aff; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}
header { border-bottom: 1px solid var(--line); }
.bar { max-width: 760px; margin: 0 auto; padding: 16px 20px; display: flex; align-items: center; gap: 10px; }
.bar img { width: 28px; height: auto; }
.bar a { color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.bar nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
.bar nav a { font-weight: 500; font-size: 14px; color: var(--muted); }
main { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 6px; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
h2 { font-size: 21px; margin: 40px 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 17px; margin: 24px 0 6px; }
a { color: var(--brand); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.summary { background: var(--soft); border-radius: 14px; padding: 18px 20px; margin: 0 0 8px; }
.summary ul { margin: 6px 0 0; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 10px 0; }
th, td { text-align: left; vertical-align: top; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; background: var(--soft); }
.table-wrap { overflow-x: auto; }
.todo { background: var(--todo); border-radius: 4px; padding: 0 4px; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer div { max-width: 760px; margin: 0 auto; padding: 20px; }