.pdf-preview {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background-color: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
}

.pdf-preview canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.pdf-preview .pdf-loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    color: #666;
    font-size: 14px;
    z-index: 111111;
}

.pdf-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 111111;
}

.pdf-preview:hover .pdf-overlay {
    opacity: 1;
}

.pdf-icon {
    background: rgba(0, 0, 0, 0.6);
    border-radius: 50%;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.pdf-preview:hover .pdf-icon {
    transform: scale(1);
}