/* Collections Page Styles */
.collections-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.collections-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.collections-header h1 {
    margin: 0;
    font-size: 2rem;
    color: var(--text-primary);
}

.collections-stats {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.back-link {
    color: var(--primary-color);
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

/* Collections Grid */
.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.collection-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.collection-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.collection-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.collection-card h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.collection-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.btn-icon:hover {
    opacity: 1;
}

.collection-description {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.collection-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

/* Collection Detail View */
.collection-detail {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

.collection-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.collection-detail h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    color: var(--text-primary);
}

.collection-detail .collection-actions {
    display: flex;
    gap: 0.5rem;
}

.collection-memories {
    margin-top: 2rem;
}

.collection-memories h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Memory Items in Collection */
.memories-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.memory-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    transition: border-color 0.2s;
}

.memory-item:hover {
    border-color: var(--primary-color);
}

.memory-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.memory-type-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: capitalize;
}

.memory-type-badge.type-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.memory-type-badge.type-success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.memory-type-badge.type-learning {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.memory-type-badge.type-insight {
    background: rgba(168, 85, 247, 0.1);
    color: #a855f7;
}

.memory-type-badge.type-question {
    background: rgba(251, 146, 60, 0.1);
    color: #fb923c;
}

.memory-type-badge.type-note {
    background: rgba(156, 163, 175, 0.1);
    color: #9ca3af;
}

.memory-content {
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.memory-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.memory-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.remove-from-collection {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.remove-from-collection:hover {
    opacity: 1;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state p {
    margin: 0.5rem 0;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Modal Styles for Collections */
.modal .collection-list {
    max-height: 400px;
    overflow-y: auto;
}

.modal .collection-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}

.modal .collection-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.modal .collection-item.in-collection {
    opacity: 0.6;
    cursor: default;
}

.modal .collection-item .check-mark {
    color: var(--success-color);
    float: right;
}

/* Responsive Design */
@media (max-width: 768px) {
    .collections-container {
        padding: 1rem;
    }
    
    .collections-grid {
        grid-template-columns: 1fr;
    }
    
    .collection-detail-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .collection-detail .collection-actions {
        width: 100%;
    }
    
    .collection-detail .collection-actions button {
        flex: 1;
    }
}