header{
    position: relative;
    width: 100%;
    aspect-ratio: 1400/627;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    border-bottom-right-radius: 30px;
    border-bottom-left-radius: 30px;
}
header .logo{
    position: absolute;
}
header .logo a{
    display: block;
}
header .logo img{
    width: 100%;
    aspect-ratio: 400/133;
}