:root {
  --bg: #ffffff; --fg: #1c1e21; --muted: #5b6068; --accent: #17497e;
  --border: #e4e6ea; --ok: #1e7e34; --warn: #8a5a00; --err: #b00020;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b; --fg: #e6e7e9; --muted: #9aa1ab; --accent: #8ab6ea;
    --border: #2b2f36; --ok: #5dbb76; --warn: #d8a13a; --err: #e07a8a;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 1rem/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  display: flex; min-height: 100vh; flex-direction: column;
}
main { width: 100%; max-width: 42rem; margin: 0 auto; padding: 3rem 1.25rem 2rem; flex: 1; }
h1 { font-size: 1.6rem; line-height: 1.3; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
p { margin: 0.75rem 0; }
a { color: var(--accent); }
ul { padding-left: 1.25rem; }
.lead { font-size: 1.1rem; }
.muted { color: var(--muted); }
.notice {
  border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: 6px; padding: 0.75rem 1rem; margin: 1.5rem 0;
}
.notice.ok { border-left-color: var(--ok); }
.notice.warn { border-left-color: var(--warn); }
.notice.err { border-left-color: var(--err); }
footer { border-top: 1px solid var(--border); margin-top: 2rem; }
footer .inner {
  max-width: 42rem; margin: 0 auto; padding: 1rem 1.25rem;
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; font-size: 0.875rem;
}
footer a { color: var(--muted); text-decoration: none; }
footer a:hover { text-decoration: underline; }
[hidden] { display: none !important; }