:root {
  --teal: #009688;
  --teal-dark: #00695c;
  --ink: #1f2933;
  --muted: #5f6b76;
  --line: #dfe7e4;
  --bg: #f6f8f7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}
a { color: var(--teal-dark); }
a:focus-visible { outline: 3px solid rgba(0, 150, 136, 0.45); outline-offset: 2px; border-radius: 6px; }
header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.wrap { width: min(760px, 100% - 40px); margin-inline: auto; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--ink); text-decoration: none; }
.brand svg { width: 28px; height: 28px; }
.back { color: var(--muted); text-decoration: none; font-size: 15px; }
.back:hover { color: var(--ink); }
main { padding: 44px 0 64px; }
h1 { font-size: clamp(28px, 4vw, 38px); letter-spacing: -0.6px; margin: 0 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 30px; }
h2 { font-size: 20px; margin: 34px 0 8px; letter-spacing: -0.2px; }
p { margin: 0 0 14px; }
.note {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px; margin-top: 36px;
}
footer { border-top: 1px solid var(--line); background: #fff; padding: 24px 0 34px; }
footer p { color: var(--muted); font-size: 13.5px; margin: 0; }