* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: #f0f2f5;
    color: #1a1a2e;
}

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

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.nav-menu {
    padding: 20px 0;
}

.nav-section {
    padding: 12px 20px 6px;
    color: #888;
    font-size: 11px;
    text-transform: uppercase;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #ddd;
    text-decoration: none;
}

.nav-item:hover, .nav-item.active {
    background: rgba(255,255,255,0.1);
    color: white;
}

.main-content {
    flex: 1;
    margin-left: 280px;
}

.top-bar {
    background: white;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
}

.content {
    padding: 24px;
}

h1 {
    font-size: 28px;
    margin-bottom: 24px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success { background: #d4edda; color: #155724; }
.alert-error { background: #f8d7da; color: #721c24; }

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
}

table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: #f8f9fa;
}

@media (max-width: 768px) {
    .sidebar { width: 70px; }
    .sidebar-header h3, .sidebar-header p, .nav-item span:not(.icon) { display: none; }
    .main-content { margin-left: 70px; }
}

/* Dashboard specifiek */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.stat-card.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stat-card.success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.stat-card.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.stat-card.info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}

/* Kaarten */
.card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

/* Formulieren */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 14px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn:hover {
    background: #5a67d8;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #6c757d;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
}

.btn-danger:hover {
    background: #c82333;
}

/* Systeem informatie tabel */
.info-table {
    width: 100%;
}

.info-table td {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.info-table td:first-child {
    width: 140px;
    font-weight: 500;
    color: #555;
}

.info-table td:last-child {
    color: #333;
}

/* Top bar links */
.profile-link {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background 0.2s;
}

.profile-link:hover {
    background: #f0f2f5;
    text-decoration: underline;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-email {
    font-size: 14px;
    color: #555;
}