body { background-image: url(https://miraprint.de/wp-content/uploads/2025/06/Asset-5.svg); background-position: center 120%; background-repeat: no-repeat; background-size: 100%; } #brx-header { position: sticky; top: -244px; z-index: 99; } .stuck { background-color: var(--white); transition: background-color .5s ease; } @media (max-width: 478px) { #brx-header { top: -240px; } }