.header{
    min-height: 0;
}
.header .container:first-child, .header .container-fluid:first-child, .header .container-sm:first-child, .header .container-md:first-child, .header .container-lg:first-child, .header .container-xl:first-child, .header .container-xxl:first-child{
    min-height: 0;
}