/* Apply background to the body or a specific container */
body {
    background-image: url('%%ASSET_url_to_your_image%%');
    background-size: cover;           /* or 'contain' or specific size e.g., '100% 100%' */
    background-repeat: no-repeat;
    background-position: center center;
    border: 5px solid #cccccc;        /* Optional: adds a border around the body */
}

/* Optional: If you want to control background on a specific section */
.main-container {
    background-image: url('%%ASSET_url_to_your_image%%');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center top;
    border: 2px solid #000;
    padding: 20px;
}