:root {
  --sidebar-width: 260px;
  --bg: #f0f2f5;
  --card: #ffffff;
  --primary: #1e3a5f;
  --primary-light: #2d5a8a;
  --accent: #0f62fe;
  --text: #1a1a2e;
  --muted: #6b7280;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body.admin-app {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.admin-shell {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, var(--primary) 0%, #152a45 100%);
  color: #fff;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  padding: 20px;
  font-weight: 700;
  font-size: 1.1rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }

.nav-group { margin-bottom: 4px; }

.nav-group-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.9);
  font-size: 0.95rem;
  cursor: pointer;
  text-align: left;
}

.nav-group-toggle:hover { background: rgba(255,255,255,0.08); }

.nav-group-toggle .chevron {
  transition: transform 0.2s;
  font-size: 0.75rem;
}

.nav-group.open .chevron { transform: rotate(90deg); }

.nav-submenu {
  display: none;
  background: rgba(0,0,0,0.15);
}

.nav-group.open .nav-submenu { display: block; }

.nav-link {
  display: block;
  padding: 10px 20px 10px 36px;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.9rem;
}

.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

.nav-link-top {
  display: block;
  padding: 12px 20px;
  color: rgba(255,255,255,0.9);
  text-decoration: none;
}

.nav-link-top:hover, .nav-link-top.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
}

.nav-link-external::after {
  content: " ↗";
  font-size: 0.75rem;
  opacity: 0.85;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-footer form button {
  width: 100%;
  padding: 10px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
}

.admin-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.admin-topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-topbar h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

.admin-content { padding: 24px 28px; flex: 1; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card);
  border-radius: 10px;
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.stat-card .label { color: var(--muted); font-size: 0.85rem; margin-bottom: 6px; }
.stat-card .value { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-card.success .value { color: var(--success); }
.stat-card.danger .value { color: var(--danger); }
.stat-card.warning .value { color: var(--warning); }

.panel-card {
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.panel-card h2 { margin: 0 0 16px; font-size: 1.1rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.85rem; font-weight: 500; color: var(--muted); }
.field input, .field select { padding: 10px; border: 1px solid var(--border); border-radius: 6px; }

.btn {
  padding: 10px 18px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-block;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary { background: #e5e7eb; color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { background: #f9fafb; font-weight: 600; font-size: 0.85rem; color: var(--muted); }

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-active { background: #d1fae5; color: #065f46; }
.badge-inactive { background: #fee2e2; color: #991b1b; }
.badge-hml { background: #fef3c7; color: #92400e; }
.badge-prod { background: #dbeafe; color: #1e40af; }

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }

.form-actions { margin-top: 16px; display: flex; gap: 10px; }

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a5f 0%, #2d5a8a 100%);
}

.login-card {
  background: var(--card);
  border-radius: 12px;
  padding: 32px;
  width: min(420px, 92vw);
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-card h1 { margin: 0 0 8px; color: var(--primary); }
.login-subtitle { color: var(--muted); margin: 0 0 24px; }
.text-danger { color: var(--danger); font-size: 0.8rem; }
.text-muted { color: var(--muted); font-size: 0.85rem; }
.user-label { color: var(--muted); font-size: 0.9rem; }

@media (max-width: 900px) {
  .admin-shell { flex-direction: column; }
  .admin-sidebar { width: 100%; }
  .form-grid { grid-template-columns: 1fr; }
}