.profileframegen-frame-preview {
    padding: 15px;
    background: #f8f8f8;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 15px;
    min-height: 100px;
}

/* Checkered background for transparent images */
.profileframegen-preview img {
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%), 
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}