/* Subjects Page Styles */

.subjects-container {
    min-height: calc(100vh - 70px);
    padding: 60px 20px 80px;
}

.subjects-header {
    text-align: center;
    margin-bottom: 50px;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.page-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Filter Section */
.filter-section {
    margin-bottom: 40px;
}

.filter-header {
    margin-bottom: 20px;
}

.filter-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.year-group-filters {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 12px 24px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.filter-btn i {
    color: var(--accent-primary);
}

.filter-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.filter-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

.filter-btn.active i {
    color: white;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 20px;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-state p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Error State */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 15px;
    text-align: center;
}

.error-state i {
    font-size: 3rem;
    color: #F56565;
}

.error-state h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.error-state p {
    color: var(--text-secondary);
}

/* Subjects Grid */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.subject-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.subject-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
    border-color: var(--accent-primary);
}

.subject-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.subject-icon i {
    font-size: 2rem;
    color: white;
}

.subject-name {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    margin: 0;
}

.subject-description {
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
    font-size: 0.95rem;
    flex-grow: 1;
}

/* Subject Stats */
.subject-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 15px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-item i {
    font-size: 1.2rem;
    color: var(--accent-primary);
}

/* Year Groups Badge */
.year-groups-badge {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.year-badge {
    padding: 6px 12px;
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-primary);
}

/* Subject Actions */
.subject-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-small {
    padding: 10px 20px;
    font-size: 0.9rem;
    justify-content: center;
}

.btn-small i {
    font-size: 0.85rem;
}

/* No Results */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .subjects-container {
        padding: 40px 15px 60px;
    }

    .page-title {
        font-size: 2rem;
    }

    .year-group-filters {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
        justify-content: center;
    }

    .subjects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .subject-stats {
        gap: 8px;
    }

    .stat-item {
        font-size: 0.8rem;
    }

    .stat-item i {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.75rem;
    }

    .page-description {
        font-size: 1rem;
    }

    .subject-card {
        padding: 25px 20px;
    }

    .subject-icon {
        width: 60px;
        height: 60px;
    }

    .subject-icon i {
        font-size: 1.75rem;
    }

    .subject-name {
        font-size: 1.3rem;
    }
}