main {
    overflow-x: hidden;
    display: flex;
    position: sticky;
    top: 0;
}

#section-horizontal {
    background: #6f42c1;
    min-width: 400vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 4ch;
}