.main-page  {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

.main-page  .body-with-header {
    position: absolute;
    left:0;
    top: 0;
    padding-top: 70px;
    min-height: 100vh;
}


.main-page  .header-section {
    position: fixed;
    background-color: transparent;
}