/*
====================================
EzFile - Herramientas PDF CSS
====================================

Componentes específicos para funcionalidades PDF (split, merge, upload zones).
*/

/* ENHANCED UPLOAD ZONE STYLES */
.split-header-content {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.split-header-icon {
    flex-shrink: 0;
    color: var(--primary);
    margin-top: 0.25rem;
}

.split-header-text {
    flex: 1;
}

.split-title-icon {
    font-size: 1.2em;
    margin-right: 0.5rem;
}

.split-feature-highlight {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

[data-theme="dark"] .split-feature-highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.pdf-drop-zone-enhanced {
    position: relative;
    border: 3px dashed var(--border-color);
    border-radius: 20px;
    background: var(--bg-secondary);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    overflow: hidden;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-drop-zone-enhanced:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 
        0 12px 40px rgba(99, 102, 241, 0.15),
        0 0 0 1px rgba(99, 102, 241, 0.1);
}

[data-theme="dark"] .pdf-drop-zone-enhanced {
    background: var(--bg-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .pdf-drop-zone-enhanced:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-light);
}

.drop-zone-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.03;
    background-image: 
        radial-gradient(circle at 25% 25%, var(--primary) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, var(--accent) 0%, transparent 50%);
    background-size: 100px 100px;
    background-position: 0 0, 50px 50px;
}

.drop-zone-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%236366f1' fill-opacity='0.05'%3E%3Cpath d='M20 20c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10zm10 0c0-5.5-4.5-10-10-10s-10 4.5-10 10 4.5 10 10 10 10-4.5 10-10z'/%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.drop-zone-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    pointer-events: none;
}

.drop-zone-icon-container {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

.drop-zone-icon {
    color: var(--primary);
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.3));
    transform: scale(1);
    transition: all 0.3s ease;
}

.pdf-drop-zone-enhanced:hover .drop-zone-icon {
    transform: scale(1.1) rotate(-5deg);
    color: var(--primary-dark);
}

.drop-zone-upload-indicator {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transform: scale(0.8);
    transition: all 0.3s ease;
}

.pdf-drop-zone-enhanced:hover .drop-zone-upload-indicator {
    transform: scale(1) rotate(180deg);
    background: var(--accent);
}

.drop-zone-text {
    margin-bottom: 2rem;
}

.drop-zone-title-main {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.drop-zone-title-sub {
    display: block;
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.drop-zone-features {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.feature-badge {
    background: var(--bg-primary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

[data-theme="dark"] .feature-badge {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.pdf-drop-zone-enhanced:hover .feature-badge {
    background: white;
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.ez-btn-enhanced {
    pointer-events: auto;
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 16px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 
        0 8px 24px rgba(99, 102, 241, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.ez-btn-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.ez-btn-enhanced:hover::before {
    left: 100%;
}

.ez-btn-enhanced:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 
        0 12px 32px rgba(99, 102, 241, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.2);
    background: var(--gradient-secondary);
}

.ez-btn-enhanced:active {
    transform: translateY(-1px) scale(1.02);
}

[data-theme="dark"] .ez-btn-enhanced {
    box-shadow: 
        0 8px 24px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .ez-btn-enhanced:hover {
    box-shadow: 
        0 12px 32px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.2);
}

/* PDF SPLIT INTERFACE STYLES */

/* Split Controls */
.split-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.file-name-display {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.875rem;
    margin-left: auto;
}

/* Main Split Layout - 3 columns */
.split-layout {
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: 1.5rem;
    height: 70vh;
    min-height: 600px;
}

/* Panel Headers */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0;
}

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* Panel Descriptions */
.panel-description {
    padding: 0.75rem 1rem;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.panel-description p {
    margin: 0;
    color: var(--text-secondary);
}

.panel-description small {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 500;
}

[data-theme="dark"] .panel-description small {
    color: var(--primary-light);
}

/* Pages Panel (Left) */
.pages-panel {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    overflow: hidden;
}

.pages-list {
    height: calc(100% - 110px);
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.page-thumbnail-item {
    cursor: grab;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    transition: all 0.2s ease;
}

.page-thumbnail-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.page-thumbnail-item:active {
    cursor: grabbing;
}

.page-thumbnail {
    padding: 0.75rem;
    text-align: center;
    position: relative;
}

.page-thumb-image {
    width: 100%;
    max-width: 120px;
    height: auto;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.page-number {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.page-group-indicator {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    border-radius: 12px;
    font-weight: 500;
}

/* Viewer Panel (Center) */
.viewer-panel {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    overflow: hidden;
}

.pdf-viewer-container {
    height: calc(100% - 110px);
    position: relative;
    background: var(--neutral-50);
}

[data-theme="dark"] .pdf-viewer-container {
    background: var(--neutral-900);
}

.main-pdf-viewer {
    width: 100%;
    height: 100%;
    border: none;
    display: none;
}

.viewer-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
}

.viewer-message svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Groups Panel (Right) */
.groups-panel {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    overflow: hidden;
}

.groups-list {
    height: calc(100% - 110px);
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.empty-groups-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
}

.empty-groups-message svg {
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-groups-message small {
    opacity: 0.7;
    margin-top: 0.5rem;
}

/* Group Container */
.group-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    overflow: hidden;
}

.group-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--primary);
    color: white;
}

.group-name-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    padding: 0.375rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.group-name-input:focus {
    outline: none;
    background: white;
    color: var(--text-primary);
}

/* ===== REMOVE GROUP BUTTON STYLING ===== */
.remove-group-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    cursor: pointer;
    padding: 0.375rem;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.remove-group-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.remove-group-btn:hover::before {
    left: 100%;
}

.remove-group-btn:hover {
    background: var(--danger);
    border-color: #dc2626;
    color: white;
    transform: translateY(-1px) scale(1.05);
    box-shadow: 
        0 6px 20px rgba(239, 68, 68, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.remove-group-btn:active {
    transform: translateY(0) scale(1.02);
    box-shadow: 
        0 2px 8px rgba(239, 68, 68, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.2);
}

.remove-group-btn svg {
    transition: all 0.3s ease;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.remove-group-btn:hover svg {
    transform: rotate(90deg);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* Dark theme adjustments for remove group button */
[data-theme="dark"] .remove-group-btn {
    background: rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .remove-group-btn:hover {
    background: var(--danger);
    border-color: #dc2626;
    box-shadow: 
        0 6px 20px rgba(239, 68, 68, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Additional hover effect for the group header */
.group-header:hover .remove-group-btn {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

[data-theme="dark"] .group-header:hover .remove-group-btn {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Group Pages Container */
.group-pages-container {
    min-height: 80px;
    padding: 0.75rem;
    border: 2px dashed transparent;
    transition: all 0.2s ease;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.group-pages-container:empty::before {
    content: 'Arrastra páginas aquí';
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60px;
    width: 100%;
}

.empty-group-message {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
    padding: 1.5rem;
}

/* Group Page Items */
.group-page-item {
    position: relative;
    width: 60px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    padding: 0.5rem;
    transition: all 0.2s ease;
}

.group-page-item:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

.group-page-thumb {
    width: 100%;
    height: auto;
    border-radius: 3px;
    margin-bottom: 0.25rem;
}

.group-page-number {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-primary);
}

.remove-page-from-group-btn {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 18px;
    height: 18px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    transition: transform 0.2s ease;
}

.remove-page-from-group-btn:hover {
    transform: scale(1.1);
    background: #dc2626;
}

/* Group Footer */
.group-footer {
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.group-pages-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Loading States */
.loading-content {
    text-align: center;
    padding: 3rem;
}

.loading-content h3 {
    margin: 1rem 0 0.5rem;
    color: var(--text-primary);
}

.loading-content p {
    color: var(--text-secondary);
}

/* RESPONSIVE PARA PDF TOOLS */
@media (max-width: 1200px) {
    .split-layout {
        grid-template-columns: 250px 1fr 280px;
    }
}

@media (max-width: 968px) {
    .split-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        height: auto;
    }
    
    .pages-panel,
    .viewer-panel,
    .groups-panel {
        height: 400px;
    }
    
    .split-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .file-name-display {
        margin-left: 0;
        order: -1;
    }
}

@media (max-width: 768px) {
    .split-header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .pdf-drop-zone-enhanced {
        min-height: 250px;
    }
    
    .drop-zone-content {
        padding: 1.5rem;
    }
    
    .drop-zone-title-main {
        font-size: 1.25rem;
    }
    
    .drop-zone-features {
        gap: 0.5rem;
    }
    
    .feature-badge {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
}

@media (max-width: 640px) {
    .split-controls {
        padding: 0.75rem;
    }
    
    .pages-panel,
    .viewer-panel,
    .groups-panel {
        height: 300px;
    }
    
    .group-page-item {
        width: 50px;
        padding: 0.25rem;
    }
}

/* TEMA OSCURO PARA PDF TOOLS */
[data-theme="dark"] .group-pages-container:empty::before {
    color: #cbd5e1;
}

[data-theme="dark"] .empty-group-message {
    color: #cbd5e1;
}

[data-theme="dark"] .group-pages-count {
    color: #cbd5e1;
}

[data-theme="dark"] .group-page-number {
    color: #f1f5f9;
}

[data-theme="dark"] .group-name-input {
    background: rgba(255, 255, 255, 0.95);
    color: #1e293b;
}

[data-theme="dark"] .group-name-input:focus {
    background: white;
    color: #1e293b;
}

[data-theme="dark"] .pages-count,
[data-theme="dark"] .groups-count {
    color: #f1f5f9;
}

[data-theme="dark"] .group-container {
    border-color: #475569;
}

[data-theme="dark"] .group-page-item {
    border-color: #475569;
    background: #1e293b;
}

[data-theme="dark"] .group-page-item:hover {
    border-color: var(--primary);
    background: #334155;
}

[data-theme="dark"] .group-footer {
    background: #1e293b;
    border-top-color: #475569;
}

[data-theme="dark"] .empty-pages-message,
[data-theme="dark"] .empty-groups-message {
    color: #cbd5e1;
    background: rgba(51, 65, 85, 0.3);
    border: 1px dashed #475569;
}

[data-theme="dark"] .page-thumbnail-item {
    background: #1e293b;
    border-color: #475569;
}

[data-theme="dark"] .page-thumbnail-item:hover {
    background: #334155;
    border-color: var(--primary);
}

[data-theme="dark"] .page-number {
    color: #f1f5f9;
    background: rgba(15, 15, 35, 0.8);
}

[data-theme="dark"] .page-group-indicator {
    background: rgba(102, 126, 234, 0.2);
    color: #e2e8f0;
    border: 1px solid rgba(102, 126, 234, 0.3);
}