.main-header {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 999;
    background-color: #f4f5f9;
}

.main-header-mobile {
    position: fixed;
    top: 0;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    z-index: 999;
    background-color: #f4f5f9;
}