.fullscreen-button {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 4px;
    background-color: #f5f5f5;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: #666;
}

.fullscreen-button:hover {
    background-color: #e8e8e8;
    color: #333;
    transform: translateY(-1px);
}

.fullscreen-button:active {
    background-color: #ddd;
    transform: translateY(0px);
}

.fullscreen-button svg {
    width: 16px;
    height: 16px;
    transition: transform 0.2s ease;
}

.fullscreen-button:hover svg {
    transform: scale(1.1);
}

.image-viewer-widget .canvas-container {
    background: var(--vpl-blue-gray-4);
    border-radius: var(--vpl-border-radius);
    box-shadow:
        inset 2px 2px 5px rgba(0, 0, 0, 0.05),
        inset -2px -2px 5px rgba(255, 255, 255, 0.5);
}