/* Advanced Analytics Dashboard Styles */

.analytics-dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.analytics-card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
}

.analytics-card h3 {
    margin: 0 0 20px 0;
    color: #1f2937;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

/* Subject Performance */
.subject-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

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

.subject-info {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subject-name {
    font-weight: 500;
    color: #374151;
}

.subject-stats {
    font-size: 14px;
    color: #6b7280;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: #f3f4f6;
    border-radius: 4px;
    overflow: hidden;
    margin: 0 12px;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.accuracy-text {
    font-weight: 600;
    color: #374151;
    min-width: 40px;
    text-align: right;
}

/* Study Streak */
.streak-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.streak-item {
    text-align: center;
    padding: 16px;
    background: #f8fafc;
    border-radius: 8px;
}

.streak-number {
    font-size: 24px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 4px;
}

.streak-label {
    font-size: 12px;
    color: #6b7280;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.streak-calendar {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.streak-day {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.streak-dot {
    width: 12px;
    height: 12px;
    background: #10b981;
    border-radius: 50%;
    transition: opacity 0.3s ease;
}

.streak-day small {
    font-size: 10px;
    color: #6b7280;
}

/* Weak Topics */
.weak-topics-list {
    margin-bottom: 20px;
}

.weak-topic-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #f3f4f6;
}

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

.topic-info {
    flex: 1;
}

.topic-name {
    display: block;
    font-weight: 500;
    color: #374151;
    margin-bottom: 2px;
}

.topic-attempts {
    font-size: 12px;
    color: #6b7280;
}

.topic-accuracy {
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 14px;
}

.topic-accuracy.low {
    background: #fef2f2;
    color: #dc2626;
}

.topic-accuracy.medium {
    background: #fffbeb;
    color: #d97706;
}

.topic-accuracy.high {
    background: #f0fdf4;
    color: #16a34a;
}

.improvement-suggestion {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: #eff6ff;
    border-radius: 8px;
    border-left: 4px solid #3b82f6;
}

.improvement-suggestion i {
    color: #3b82f6;
}

.improvement-suggestion p {
    margin: 0;
    color: #1e40af;
    font-size: 14px;
}

/* Previous Papers */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.paper-card {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    background: #fafafa;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.paper-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.paper-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.paper-header h4 {
    margin: 0;
    color: #374151;
    font-size: 16px;
}

.paper-year {
    background: #667eea;
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.paper-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.paper-details span {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #6b7280;
}

.difficulty {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.difficulty.easy {
    background: #dcfce7;
    color: #16a34a;
}

.difficulty.medium {
    background: #fef3c7;
    color: #d97706;
}

.difficulty.hard {
    background: #fecaca;
    color: #dc2626;
}

/* Priority Support */
.support-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.support-level {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px;
}

.support-level i {
    font-size: 24px;
}

.support-level span {
    font-size: 18px;
    font-weight: 600;
}

.support-level small {
    margin-left: auto;
    opacity: 0.9;
}

.support-channels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.support-channel {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: #fafafa;
}

.support-channel i {
    color: #667eea;
    font-size: 18px;
}

.support-channel div {
    flex: 1;
}

.support-channel strong {
    display: block;
    color: #374151;
    margin-bottom: 2px;
}

.support-channel small {
    display: block;
    color: #6b7280;
    font-size: 12px;
}

.availability {
    display: inline-block;
    background: #dcfce7;
    color: #16a34a;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    margin-top: 4px;
}

.support-features h4 {
    margin: 0 0 12px 0;
    color: #374151;
}

.support-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.support-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    color: #374151;
}

.support-features li i {
    color: #10b981;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .analytics-dashboard {
        padding: 16px;
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
    }
    
    .streak-stats {
        grid-template-columns: 1fr;
    }
    
    .papers-grid {
        grid-template-columns: 1fr;
    }
    
    .support-channels {
        grid-template-columns: 1fr;
    }
}