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

body {
    background-color: #f8f9fa;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.375rem;
}

.card-header {
    background-color: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: 500;
}

.metric-card {
    transition: transform 0.2s ease-in-out;
}

.metric-card:hover {
    transform: translateY(-2px);
}

.score-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto;
}

.score-excellent {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
}

.score-good {
    background: linear-gradient(135deg, #17a2b8, #6f42c1);
    color: white;
}

.score-fair {
    background: linear-gradient(135deg, #ffc107, #fd7e14);
    color: #212529;
}

.score-poor {
    background: linear-gradient(135deg, #dc3545, #e83e8c);
    color: white;
}

.alert-item {
    border-left: 4px solid var(--warning-color);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background-color: rgba(255, 193, 7, 0.1);
    border-radius: 0.375rem;
}

.alert-item.high {
    border-left-color: var(--danger-color);
    background-color: rgba(220, 53, 69, 0.1);
}

.alert-item.medium {
    border-left-color: var(--warning-color);
    background-color: rgba(255, 193, 7, 0.1);
}

.alert-item.low {
    border-left-color: var(--info-color);
    background-color: rgba(13, 202, 240, 0.1);
}

.nav-tabs .nav-link {
    border: 1px solid transparent;
    border-radius: 0.375rem 0.375rem 0 0;
}

.nav-tabs .nav-link:hover {
    border-color: #e9ecef #e9ecef #dee2e6;
}

.nav-tabs .nav-link.active {
    background-color: #fff;
    border-color: #dee2e6 #dee2e6 #fff;
}

.table th {
    border-top: none;
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.15s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
}

.form-control, .form-select {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.modal-content {
    border-radius: 0.5rem;
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    border-radius: 0.5rem 0.5rem 0 0;
}

.modal-footer {
    border-top: 1px solid #dee2e6;
    border-radius: 0 0 0.5rem 0.5rem;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.chart-container {
    position: relative;
    height: 300px;
    margin: 1rem 0;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
}

/* Custom animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Utility classes */
.text-shadow {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.border-gradient {
    border: 2px solid;
    border-image: linear-gradient(135deg, var(--primary-color), var(--info-color)) 1;
}