/* Styling for PDF Split & Join Tool */

.pdf-tool-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Tabs */
.pdf-tabs {
    display: flex;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1px;
}

.pdf-tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    padding: 12px 18px;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    margin-bottom: -1px;
}

.pdf-tab-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-card-hover);
}

.pdf-tab-btn.active {
    color: var(--primary);
    border: 1px solid var(--border-color);
    border-bottom-color: var(--bg-primary);
    background-color: var(--bg-primary);
}

/* Tab Panels */
.pdf-tab-panel {
    display: none;
    animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.pdf-tab-panel.active {
    display: block;
}

/* Merge Queue List */
.merge-queue {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    max-height: 350px;
    overflow-y: auto;
    padding-right: 6px;
}

.merge-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 16px;
    gap: 16px;
    transition: border-color 0.2s ease;
}

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

.merge-item-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
    min-width: 0; /* Ensures truncation works */
}

.merge-item-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.merge-item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 10px;
}

.merge-item-actions {
    display: flex;
    gap: 6px;
}

.merge-action-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.merge-action-btn:hover {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.merge-action-btn:hover.btn-remove {
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
    background-color: var(--danger-light);
}

.merge-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

/* Split Panel Styles */
.split-file-details {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    margin-top: 20px;
}

.split-meta-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.split-meta-name {
    font-weight: 700;
    color: var(--text-primary);
}

.split-meta-pages {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Scrollable split page grid */
.split-pages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 16px;
    max-height: 480px;
    overflow-y: auto;
    padding: 12px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-top: 16px;
}

.page-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    position: relative;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.page-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.page-card-checkbox-wrapper {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 10;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.page-card-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
}

.page-card-thumbnail-container {
    width: 100%;
    aspect-ratio: 1 / 1.414; /* A4 Ratio */
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color);
}

.page-card-thumbnail {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

/* Placeholder loading skeleton for thumbnails */
.page-thumbnail-skeleton {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.skeleton-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.page-card-info {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
}

.page-card-num {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.btn-card-download {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.btn-card-download:hover {
    border-color: var(--primary);
    color: var(--primary);
    background-color: var(--bg-secondary);
}

/* Bulk Bar Panel */
.split-bulk-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.split-bulk-select-all {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.bulk-select-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.split-bulk-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Loading Overlay */
.pdf-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(9, 13, 22, 0.7);
    backdrop-filter: blur(4px);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 200;
    animation: fadeIn 0.2s ease;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.pdf-loading-overlay p {
    font-weight: 600;
    color: var(--text-primary);
}

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