:root {
  color-scheme: light;
  --teal: #0f766e;
  --mint: #2dd4bf;
  --paper: #f7f8f6;
  --ink: #17202a;
  --muted: #53615f;
  --line: #dde4e1;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--teal); }
header, main, footer { width: min(860px, calc(100% - 40px)); margin: 0 auto; }
header { padding: 36px 0 16px; }
nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 14px; font-size: 14px; }
nav a { text-decoration: none; font-weight: 700; }
main {
  margin-bottom: 48px;
  padding: 30px clamp(22px, 5vw, 52px);
  background: white;
  border: 1px solid var(--line);
  border-radius: 20px;
}
h1 { margin: 0; font-size: clamp(28px, 5vw, 40px); letter-spacing: -0.04em; }
h2 { margin-top: 38px; font-size: 22px; letter-spacing: -0.025em; }
h3 { margin-top: 26px; font-size: 17px; }
p, li { color: #263532; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; color: var(--teal); }
.mark { width: 34px; height: 34px; border-radius: 10px; background: var(--teal); }
.meta, .notice { color: var(--muted); font-size: 14px; }
.notice { padding: 14px 16px; border-left: 4px solid var(--mint); background: #eefbf8; }
table { width: 100%; border-collapse: collapse; display: block; overflow-x: auto; }
th, td { min-width: 150px; padding: 12px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #eef4f2; }
footer { padding: 0 0 40px; color: var(--muted); font-size: 13px; }
code { background: #eef4f2; padding: 2px 5px; border-radius: 4px; }