/* Custom Animations & Polishing */

/* Fade In Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Page Thumbnail Styles */
.page-thumbnail {
    transition: transform 0.2s, box-shadow 0.2s;
    touch-action: none; /* Critical for touch dragging */
}

.page-thumbnail:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.page-thumbnail.dragging {
    opacity: 0.5;
    transform: scale(1.05);
    z-index: 50;
    position: absolute; /* Detach from flow during drag if using custom logic, or just style for HTML5 DnD */
    pointer-events: none;
}

/* For HTML5 DnD Ghost */
.page-thumbnail.sortable-ghost {
    opacity: 0.4;
    background: #e5e7eb;
    border: 2px dashed #9ca3af;
}

/* Rotation Overlay */
.page-overlay {
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity 0.2s;
}

.page-thumbnail:hover .page-overlay,
.page-thumbnail:focus-within .page-overlay {
    opacity: 1;
}

/* Mobile specific overrides */
@media (max-width: 768px) {
    .page-overlay {
        opacity: 1; /* Always show controls on mobile or have a toggle? Better to have them visible or easily accessible */
        background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 50%);
    }
    
    /* Make controls larger for touch */
    .control-btn {
        padding: 12px;
    }
}

/* Spinner */
.loader {
    border: 3px solid #f3f3f3;
    border-radius: 50%;
    border-top: 3px solid #3498db;
    width: 24px;
    height: 24px;
    -webkit-animation: spin 1s linear infinite; /* Safari */
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}