/* RedCMS 控制中心 — 轻量后台 */
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1f2937;
  background: #f5f6f8;
}
.topbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding: 14px 24px;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}
.topbar__brand { font-weight: 700; font-size: 18px; margin-right: 12px; }
.topnav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.topnav a { color: #6b7280; font-size: 14px; font-weight: 500; text-decoration: none; }
.topnav a:hover, .topnav a.is-active { color: #0071e3; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: 1fr; } }
.main { max-width: 900px; margin: 0 auto; padding: 24px 20px 48px; }
.page-head h1 { margin: 0 0 8px; font-size: 22px; }
.muted { color: #6b7280; }
.ft { text-align: center; padding: 24px; font-size: 12px; }
.grid { display: grid; gap: 20px; grid-template-columns: 1fr 1fr; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
}
.card h2 { margin: 0 0 12px; font-size: 16px; }
.ver { font-size: 28px; font-weight: 700; margin: 0; }
.form label { display: block; font-weight: 600; margin-bottom: 8px; }
.form input[type=file] { margin-bottom: 12px; width: 100%; }
.hint { font-size: 12px; color: #6b7280; margin: 0 0 12px; }
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  background: #fff;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
}
.btn--primary { background: #0071e3; color: #fff; border-color: #0071e3; }
.btn--ghost { background: transparent; }
.btn--sm { padding: 6px 12px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 20px;
}
.alert--ok { background: #ecfdf5; border: 1px solid #a7f3d0; color: #065f46; }
.alert--err { background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; }
.alert--warn { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { text-align: left; padding: 8px; border-bottom: 1px solid #f0f2f5; }
.list { margin: 0; padding-left: 20px; }
code { font-size: 12px; background: #f3f4f6; padding: 2px 6px; border-radius: 4px; }
.input, .form textarea {
  width: 100%;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  font: inherit;
}
.form textarea { resize: vertical; min-height: 72px; }
.btn--block { width: 100%; text-align: center; margin-top: 8px; }
.topnav__logout { margin-left: auto; color: #9ca3af !important; }
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: #f5f6f8;
}
.auth-card {
  width: 100%;
  max-width: 400px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 28px 24px;
  box-shadow: 0 8px 24px rgba(0,0,0,.06);
}
.auth-card h1 { margin: 0 0 8px; font-size: 20px; }
.auth-card .muted { margin: 0 0 20px; }