:root {
  --bg: #ffffff; --panel: #f5f5f7; --text: #1d1d1f; --muted: #6e6e73;
  --rule: #d2d2d7; --link: #0066cc; --warn: #b25000;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1d1f; --panel: #2c2c2e; --text: #f5f5f7; --muted: #a1a1a6;
    --rule: #424245; --link: #2997ff; --warn: #ff9f0a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
a { color: var(--link); }
header.site {
  max-width: 760px; margin: 0 auto; padding: 20px 16px 0;
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap;
}
header.site .brand { font-weight: 600; color: var(--text); text-decoration: none; }
header.site nav a { margin-left: 16px; font-size: 15px; }
header.site nav a:first-child { margin-left: 0; }
main { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 6px; }
h2 { font-size: 22px; margin: 40px 0 10px; }
h3 { font-size: 17px; margin: 22px 0 4px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
.lede { font-size: 20px; color: var(--muted); margin: 0 0 24px; }
.updated { color: var(--muted); margin: 0 0 32px; }
.app-head { display: flex; gap: 20px; align-items: center; margin-bottom: 8px; }
.app-head img { width: 96px; height: 96px; flex: none; }
.app-head h1 { margin: 0; }
.app-head p { margin: 2px 0 0; color: var(--muted); font-size: 19px; }
.card {
  display: flex; gap: 18px; align-items: center; padding: 18px;
  background: var(--panel); border-radius: 14px; text-decoration: none; color: var(--text);
}
.card img { width: 72px; height: 72px; flex: none; }
.card strong { display: block; font-size: 19px; }
.card span { color: var(--muted); }
.notice {
  border-left: 4px solid var(--warn); background: var(--panel);
  padding: 12px 16px; border-radius: 6px; margin: 24px 0;
}
.notice p { margin: 0; }
.contact { background: var(--panel); border-radius: 14px; padding: 18px; }
.contact p:last-child { margin-bottom: 0; }
footer {
  max-width: 760px; margin: 0 auto; padding: 16px 16px 40px;
  border-top: 1px solid var(--rule); color: var(--muted); font-size: 14px;
}
footer a { color: var(--muted); }
@media (max-width: 480px) {
  h1 { font-size: 28px; }
  .app-head img { width: 72px; height: 72px; }
}