.page-thumbnail {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border-radius: 0.5rem;
}
.page-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 20px rgba(0, 123, 255, 0.15);
}
.selected-page {
    border: 3px solid #007BFF;
    border-radius: 0.5rem;
    box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.15);
}

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #F8F9FA;
}
::-webkit-scrollbar-thumb {
    background: #dee2e6;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #adb5bd;
}