/**
 * NEXUS CHAT HISTORY MODAL - Estilos modernos y responsive
 */

/* Modal principal */
.chat-history-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.chat-history-modal .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.chat-history-modal .modal-container {
    position: relative;
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border-color);
}

/* Header del modal */
.chat-history-modal .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.chat-history-modal .modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.chat-history-modal .modal-title h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.chat-history-modal .modal-title i {
    color: var(--primary);
    font-size: 1.25rem;
}

.chat-history-modal .modal-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.chat-history-modal .modal-actions .btn {
    padding: 0.5rem 1rem;
    border-radius: 10px;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-history-modal .modal-actions .btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
}

.chat-history-modal .modal-actions .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.chat-history-modal .modal-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.chat-history-modal .modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.chat-history-modal .modal-close-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Body del modal */
.chat-history-modal .modal-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 1.5rem 2rem;
}

/* Barra de búsqueda */
.chat-history-modal .search-bar {
    margin-bottom: 1.5rem;
}

.chat-history-modal .search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.chat-history-modal .search-input-wrapper i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    pointer-events: none;
}

.chat-history-modal #historySearchInput {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.chat-history-modal #historySearchInput:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.1);
}

.chat-history-modal .clear-search-btn {
    position: absolute;
    right: 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.chat-history-modal .clear-search-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Pestañas de filtrado */
.chat-history-modal .filter-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.chat-history-modal .tab-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.chat-history-modal .tab-btn.active {
    background: var(--primary);
    color: white;
}

.chat-history-modal .tab-btn:hover:not(.active) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.chat-history-modal .tab-btn .count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
}

.chat-history-modal .tab-btn.active .count {
    background: rgba(255, 255, 255, 0.3);
}

/* Acciones masivas */
.chat-history-modal .bulk-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.chat-history-modal .selected-count {
    font-weight: 600;
    color: var(--text-primary);
}

.chat-history-modal .bulk-actions .btn {
    padding: 0.375rem 0.75rem;
    border-radius: 8px;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-history-modal .bulk-actions .btn-danger {
    background: var(--danger);
    color: white;
}

.chat-history-modal .bulk-actions .btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Contenedor de chats */
.chat-history-modal .chats-container {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.chat-history-modal .loading-spinner {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.chat-history-modal .chats-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-history-modal .empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
}

.chat-history-modal .empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.chat-history-modal .empty-state h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.chat-history-modal .empty-state p {
    margin: 0;
    font-size: 0.875rem;
}

/* Items de chat */
.chat-history-modal .chat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.chat-history-modal .chat-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.chat-history-modal .chat-checkbox {
    flex-shrink: 0;
}

.chat-history-modal .chat-checkbox input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
    accent-color: var(--primary);
}

.chat-history-modal .chat-content {
    flex: 1;
    min-width: 0;
}

.chat-history-modal .chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.chat-history-modal .chat-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-history-modal .chat-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.chat-history-modal .chat-preview {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.chat-history-modal .chat-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chat-history-modal .chat-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.chat-history-modal .chat-item:hover .chat-actions {
    opacity: 1;
}

.chat-history-modal .action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.chat-history-modal .action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.chat-history-modal .action-btn.export-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.chat-history-modal .action-btn.delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

/* Barra de estadísticas */
.chat-history-modal .stats-bar {
    display: flex;
    gap: 2rem;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
    flex-wrap: wrap;
}

.chat-history-modal .stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chat-history-modal .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.chat-history-modal .stat-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .chat-history-modal .modal-container {
        width: 95%;
        max-height: 95vh;
        border-radius: 16px;
    }

    .chat-history-modal .modal-header {
        padding: 1rem 1.5rem;
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .chat-history-modal .modal-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .chat-history-modal .modal-actions .btn {
        flex: 1;
        min-width: 120px;
        justify-content: center;
    }

    .chat-history-modal .modal-body {
        padding: 1rem 1.5rem;
    }

    .chat-history-modal .filter-tabs {
        gap: 0.25rem;
        padding-bottom: 0.25rem;
    }

    .chat-history-modal .tab-btn {
        padding: 0.375rem 0.75rem;
        font-size: 0.75rem;
    }

    .chat-history-modal .bulk-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .chat-history-modal .chat-item {
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .chat-history-modal .chat-actions {
        opacity: 1;
    }

    .chat-history-modal .stats-bar {
        gap: 1rem;
        justify-content: space-around;
    }

    .chat-history-modal .stat-item {
        flex: 1;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .chat-history-modal .modal-container {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }

    .chat-history-modal .modal-header {
        padding: 1rem;
    }

    .chat-history-modal .modal-body {
        padding: 1rem;
    }

    .chat-history-modal .modal-title h2 {
        font-size: 1.25rem;
    }

    .chat-history-modal .modal-actions .btn {
        font-size: 0.75rem;
        padding: 0.5rem 0.75rem;
    }

    .chat-history-modal .chat-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }

    .chat-history-modal .chat-meta {
        gap: 0.5rem;
    }

    .chat-history-modal .stats-bar {
        gap: 0.5rem;
    }
}

/* Dark mode adjustments */
[data-theme="dark"] .chat-history-modal .modal-container {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .chat-history-modal .chat-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Scrollbar styling */
.chat-history-modal .chats-container::-webkit-scrollbar {
    width: 6px;
}

.chat-history-modal .chats-container::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.chat-history-modal .chats-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-history-modal .chats-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.chat-history-modal .filter-tabs::-webkit-scrollbar {
    height: 4px;
}

.chat-history-modal .filter-tabs::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.chat-history-modal .filter-tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}