.header{
    display: flex;
    justify-content: space-between;
    align-items: center;
    block-size: 80px;
    position: sticky;
    top: 0;
    backdrop-filter: blur(10px);

    /* mis adiciones */
    z-index: 300;
    max-inline-size: 1158px;

    padding-inline-end: 16px;
    padding-inline-start: 16px;
    margin: auto;
}