/* Analytics Page Styles */
.analytics-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.analytics-header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.analytics-header h1 {
    color: white;
    margin: 0 0 1rem 0;
    font-size: 2rem;
    font-weight: 600;
}

.analytics-nav {
    display: flex;
    gap: 1rem;
}

.nav-link {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .analytics-header {
        padding: 1rem;
    }

    .analytics-header h1 {
        font-size: 1.5rem;
    }

    .analytics-nav {
        flex-direction: column;
        gap: 0.5rem;
    }

    .nav-link {
        text-align: center;
    }
}

.analytics-page h1 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
    font-weight: 300;
}

.loading {
    text-align: center;
    padding: 2rem;
    font-size: 1.2rem;
    color: #7f8c8d;
}

.stats-section {
    margin-bottom: 3rem;
}

.stats-section h2 {
    color: #34495e;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 400;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.stat-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    font-weight: 500;
    opacity: 0.9;
}

.stat-value {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
}

.leaderboard-section {
    margin-bottom: 3rem;
}

.leaderboard-section h2 {
    color: #34495e;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 400;
}

.leaderboard-category h3 {
    color: #7f8c8d;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 500;
}

.leaderboard-table {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.leaderboard-table table {
    width: 100%;
    border-collapse: collapse;
}

.leaderboard-table th {
    background: #f8f9fa;
    color: #495057;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #e9ecef;
}

.leaderboard-table td {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
    color: #495057;
}

.leaderboard-table tr:hover {
    background: #f8f9fa;
}

.leaderboard-table tr:last-child td {
    border-bottom: none;
}

/* Responsive design */
@media (max-width: 768px) {
    .analytics-page {
        padding: 1rem;
    }
    
    .analytics-page h1 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .leaderboard-table {
        font-size: 0.9rem;
    }
    
    .leaderboard-table th,
    .leaderboard-table td {
        padding: 0.75rem;
    }
}

/* Animation for loading state */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Success/error states */
.stat-card.success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
}

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

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