/* 后台统一壳层与导航（与 assets/app.css 并存） */

.admin-body {
  margin: 0;
  min-height: 100vh;
  background: #f4f5f7;
  color: #111;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.admin-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
  box-sizing: border-box;
}

.admin-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.admin-brand {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
  flex-shrink: 0;
}

.admin-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
  flex: 1;
  min-width: min(100%, 320px);
}

.admin-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 12px;
  text-decoration: none;
  border: 1px solid #e3e4e8;
  background: #fff;
  color: #111;
  white-space: nowrap;
  box-sizing: border-box;
  font-size: 14px;
  line-height: 1.2;
}

.admin-nav a:hover {
  border-color: #ccc;
  background: #fafafa;
}

.admin-nav a.active {
  background: #111;
  color: #fff;
  border-color: #111;
}

.admin-main {
  max-width: 1180px;
  margin: 0 auto;
}

.admin-card {
  background: #fff;
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.06);
  box-sizing: border-box;
  margin-top: 16px;
}

.admin-card:first-of-type {
  margin-top: 0;
}

.admin-card--gate {
  margin-top: 16px;
}

.admin-page-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 0 0 8px;
}

.admin-muted,
.admin-muted.small {
  color: #5c5f66;
  line-height: 1.55;
  margin: 8px 0 0;
}

.admin-muted.small {
  font-size: 13px;
}

.admin-alert {
  border-radius: 14px;
  padding: 14px 16px;
  margin: 12px 0;
  line-height: 1.45;
  box-sizing: border-box;
}

.admin-alert--danger {
  background: #fde8e8;
  border: 1px solid #f5c2c2;
  color: #7a1e1e;
}

.admin-alert--success {
  background: #e6f7ec;
  border: 1px solid #b8e0c8;
  color: #14532d;
}

.admin-alert--info {
  background: #eef3ff;
  border: 1px solid #c9d6f5;
  color: #1a2d5c;
}

.admin-gate-title {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.admin-pre {
  background: #0d1117;
  color: #e6edf3;
  border-radius: 14px;
  padding: 16px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
}

.admin-pre--copy {
  margin: 12px 0;
}

.admin-gate-form {
  margin-top: 16px;
}

.admin-label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.admin-input-wide {
  max-width: 420px;
  width: 100%;
}

.admin-shell .mt-8 {
  margin-top: 8px;
}
.admin-shell .mt-16 {
  margin-top: 16px;
}
.admin-shell .mt-24 {
  margin-top: 24px;
}

/* 与旧版 .page-title 并存 */
.admin-shell .page-title {
  margin-top: 0;
}

/* 与 app.css 表格/按钮共存 */
.admin-shell .table {
  width: 100%;
}

.admin-route-sub {
  margin-top: 20px;
  font-size: 1.05rem;
  font-weight: 700;
}