:root {
  --navy: #06165B;
  --navy-deep: #030D36;
  --blue: #075BE8;
  --blue-hover: #0548BD;
  --blue-subtle: rgba(7, 91, 232, 0.08);
  --cyan: #00B5EF;
  --teal: #00B99D;
  --light-bg: #F4F8FF;
  --surface: #FFFFFF;
  --border: rgba(7, 91, 232, 0.12);
  --border-subtle: #E2E8F0;
  --text-main: #334155;
  --text-heading: #0F172A;
  --text-muted: #64748B;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 6px rgba(6, 22, 91, 0.04);
  --shadow-md: 0 10px 25px -4px rgba(6, 22, 91, 0.08);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font); background: var(--light-bg); color: var(--text-main); line-height: 1.5; }
a { color: var(--blue); text-decoration: none; }

/* Admin Layout */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 260px; background: var(--navy-deep); color: #CBD5E1; display: flex; flex-direction: column; flex-shrink: 0; border-right: 1px solid rgba(255,255,255,0.08); }
.admin-brand { padding: 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; gap: 12px; }
.admin-brand-logo { width: 40px; height: 40px; object-fit: contain; }
.admin-brand-name { font-size: 1.2rem; font-weight: 800; color: #FFFFFF; letter-spacing: -0.01em; }
.admin-brand-sub { font-size: 0.65rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.05em; }

.admin-nav { list-style: none; padding: 20px 12px; display: flex; flex-direction: column; gap: 6px; flex-grow: 1; }
.admin-nav-item a { display: flex; align-items: center; gap: 12px; padding: 11px 16px; border-radius: var(--radius-md); color: #CBD5E1; font-size: 0.92rem; font-weight: 600; transition: all 0.2s; }
.admin-nav-item a:hover, .admin-nav-item.active a { background: rgba(7, 91, 232, 0.25); color: #FFFFFF; }
.admin-nav-item.active a { background: var(--blue); }

.admin-sidebar-footer { padding: 20px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.8rem; color: #94A3B8; }

.admin-main { flex-grow: 1; display: flex; flex-direction: column; min-width: 0; }
.admin-topbar { height: 70px; background: #FFFFFF; border-bottom: 1px solid var(--border-subtle); display: flex; align-items: center; justify-content: space-between; padding: 0 32px; }
.admin-content { padding: 32px; flex-grow: 1; }

/* Stat Cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 32px; }
.stat-card { background: #FFFFFF; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 6px; }
.stat-label { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.05em; }
.stat-val { font-size: 2rem; font-weight: 800; color: var(--navy); line-height: 1.1; }
.stat-sub { font-size: 0.8rem; color: var(--teal); font-weight: 600; }

/* Cards & Tables */
.admin-card { background: #FFFFFF; border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); margin-bottom: 32px; overflow: hidden; }
.admin-card-header { padding: 20px 24px; border-bottom: 1px solid var(--border-subtle); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.admin-card-title { font-size: 1.15rem; font-weight: 800; color: var(--text-heading); }
.admin-card-body { padding: 24px; }

.table-responsive { width: 100%; overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
.admin-table th { background: #F8FAFC; padding: 12px 16px; font-weight: 700; color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; border-bottom: 1px solid var(--border-subtle); }
.admin-table td { padding: 16px; border-bottom: 1px solid var(--border-subtle); color: var(--text-main); vertical-align: middle; }
.admin-table tr:hover td { background: #F8FAFC; }

/* Badges & Buttons */
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; font-size: 0.75rem; font-weight: 700; border-radius: var(--radius-full); text-transform: uppercase; }
.badge-blue { background: var(--blue-subtle); color: var(--blue); }
.badge-teal { background: rgba(0, 185, 157, 0.15); color: #008772; }
.badge-amber { background: #FEF3C7; color: #92400E; }
.badge-gray { background: #F1F5F9; color: #475569; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; font-size: 0.88rem; font-weight: 600; border-radius: var(--radius-sm); border: none; cursor: pointer; transition: all 0.2s; }
.btn-primary { background: var(--blue); color: #FFFFFF !important; }
.btn-primary:hover { background: var(--blue-hover); }
.btn-danger { background: #EF4444; color: #FFFFFF !important; }
.btn-danger:hover { background: #DC2626; }
.btn-outline { background: transparent; border: 1.5px solid var(--border-subtle); color: var(--text-main); }
.btn-outline:hover { background: #F8FAFC; border-color: var(--blue); color: var(--blue); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 700; color: var(--text-heading); margin-bottom: 6px; }
.form-control { width: 100%; padding: 11px 14px; font-size: 0.92rem; font-family: inherit; border: 1.5px solid var(--border-subtle); border-radius: var(--radius-sm); background: #FFFFFF; color: var(--text-heading); outline: none; }
.form-control:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(7, 91, 232, 0.12); }
textarea.form-control { resize: vertical; min-height: 100px; }

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 768px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; }
  .form-grid-2 { grid-template-columns: 1fr; }
  .admin-topbar { padding: 0 16px; }
  .admin-content { padding: 16px; }
}

/* Alert Boxes */
.alert { padding: 14px 18px; border-radius: var(--radius-sm); font-size: 0.9rem; margin-bottom: 20px; display: flex; align-items: center; justify-content: space-between; }
.alert-success { background: #E8F9EE; border: 1px solid #A6E7B9; color: #146C36; }
.alert-error { background: #FEECEB; border: 1px solid #FCA5A5; color: #991B1B; }

/* Toggle Switch */
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; inset: 0; background-color: #CBD5E1; transition: .3s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; transition: .3s; border-radius: 50%; }
input:checked + .slider { background-color: var(--teal); }
input:checked + .slider:before { transform: translateX(20px); }