:root {
  --primary: #0a2540;
  --accent: #c5a04e;
  --bg: #f3f4f6;
  --sidebar: #0f172a;
  --card: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #059669;
  --radius: 6px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: #1f2937;
}

.admin-wrap { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 220px;
  background: var(--sidebar);
  color: #cbd5e1;
  flex-shrink: 0;
  position: fixed;
  inset: 0 auto 0 0;
  display: flex;
  flex-direction: column;
}
.admin-sidebar .brand {
  padding: 24px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.admin-sidebar .brand strong {
  color: var(--accent);
  font-size: 22px;
  letter-spacing: 2px;
  display: block;
}
.admin-sidebar .brand span { font-size: 13px; color: #94a3b8; }
.admin-sidebar nav { padding: 16px 0; flex: 1; overflow-y: auto; }
.admin-sidebar nav a {
  display: block;
  padding: 12px 24px;
  color: #cbd5e1;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.admin-sidebar nav a:hover, .admin-sidebar nav a.active {
  background: rgba(255,255,255,.05);
  color: #fff;
  border-left-color: var(--accent);
}

.admin-main { margin-left: 220px; flex: 1; min-width: 0; display: flex; flex-direction: column; }
.admin-topbar {
  background: #fff;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
}
.admin-topbar h1 { margin: 0; font-size: 20px; color: var(--primary); }
.admin-user { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.admin-user a { color: var(--danger); }
.admin-content { padding: 28px 32px; flex: 1; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,.05);
  padding: 24px;
  margin-bottom: 24px;
}
.card h3 { margin: 0 0 16px; font-size: 16px; color: var(--primary); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--card);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,.05);
}
.stat-card .num { font-size: 32px; font-weight: 800; color: var(--primary); }
.stat-card .label { color: #6b7280; font-size: 14px; margin-top: 6px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.form-group .hint { color: #6b7280; font-size: 12px; margin-top: 4px; }
input[type="text"], input[type="email"], input[type="tel"], input[type="password"], input[type="date"],
textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}
textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-actions { margin-top: 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #143b61; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: #e5e7eb; color: #374151; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #f9fafb; color: #374151; font-weight: 600; }
tr:hover { background: #f9fafb; }
td img { max-height: 60px; border-radius: 4px; }
td .actions { display: flex; gap: 8px; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}
.badge-active { background: #d1fae5; color: #065f46; }
.badge-inactive { background: #fee2e2; color: #991b1b; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 14px;
}
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }

.login-body {
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-card {
  background: #fff;
  padding: 40px;
  border-radius: 12px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 50px rgba(0,0,0,.2);
}
.login-card h1 { margin: 0 0 24px; color: var(--primary); font-size: 24px; }

@media (max-width: 900px) {
  .admin-sidebar { width: 180px; }
  .admin-main { margin-left: 180px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .admin-sidebar { position: relative; width: 100%; }
  .admin-main { margin-left: 0; }
  .admin-wrap { flex-direction: column; }
  .stats-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}