:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --dark-color: #212529;
}

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

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #fff;
    border-bottom: 2px solid #f0f0f0;
    font-weight: 600;
}

.table {
    margin-bottom: 0;
}

.table thead th {
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: #6c757d;
}

.platform-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.platform-badge.android {
    background-color: #3ddc84;
    color: #000;
}

.platform-badge.ios {
    background-color: #000;
    color: #fff;
}

.rating {
    font-weight: bold;
    font-size: 1.1rem;
}

.delta {
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

.delta.positive {
    background-color: #d4edda;
    color: #155724;
}

.delta.negative {
    background-color: #f8d7da;
    color: #721c24;
}

.delta.neutral {
    background-color: #e2e3e5;
    color: #383d41;
}

.delta::before {
    content: '';
    margin-right: 2px;
}

.delta.positive::before {
    content: '↑';
}

.delta.negative::before {
    content: '↓';
}

.delta.neutral::before {
    content: '—';
}

#statusIndicator {
    font-size: 0.875rem;
}

#statusIndicator.refreshing {
    background-color: #ffc107 !important;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

#ratingChart {
    max-height: 400px;
}

.event-item {
    padding: 0.75rem;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.875rem;
}

.event-item:last-child {
    border-bottom: none;
}

.event-time {
    color: #6c757d;
    font-size: 0.75rem;
}

.event-app {
    font-weight: 600;
    color: var(--dark-color);
}

.event-stars {
    color: #ffc107;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: #6c757d;
}

.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.btn-action {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}