:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.sidebar {
    min-height: 100vh;
    background: linear-gradient(180deg, #1e3c72 0%, #2a5298 100%);
    color: white;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 20px;
    margin: 4px 0;
    border-radius: 8px;
    transition: all 0.3s;
}

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

.sidebar .nav-link i {
    margin-right: 10px;
    width: 20px;
}

.stat-card {
    border-left: 4px solid var(--primary-color);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.table-actions a,
.table-actions button {
    padding: 5px 10px;
    font-size: 14px;
}

.badge-status {
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 500;
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a58ca 100%);
    color: white;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a58ca 100%);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0a58ca 0%, var(--primary-color) 100%);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.navbar-custom {
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chart-container {
    position: relative;
    height: 300px;
}

@media (max-width: 768px) {
    .sidebar {
        min-height: auto;
    }
}