:root {
  --text: #111;
  --muted: #666;
  --border: #e6e6e6;
  --link: #0a66c2;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", sans-serif;
  margin: 36px auto;
  max-width: 760px;
  padding: 0 16px;
  line-height: 1.6;
  color: var(--text);
}
h1 { margin: 8px 0 6px; }
h2 { margin-top: 28px; }
h3 { margin-top: 20px; }
.muted { color: var(--muted); }
.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}
.notice {
  border: 1px solid #ffd8a8;
  background: #fff8e8;
  border-radius: 12px;
  padding: 12px 14px;
  margin: 14px 0 18px;
}
.notice p {
  margin: 0;
}
.notice p + p {
  margin-top: 8px;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.lang {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
select {
  border: 1px solid #cfcfcf;
  background: #fff;
  border-radius: 8px;
  padding: 6px 8px;
  font: inherit;
}
[dir="rtl"] body { text-align: right; }
[dir="rtl"] .topbar { direction: rtl; }
[dir="rtl"] .nav { direction: rtl; }