html,body {
      height: 100%;
      margin: 0;
      overflow: hidden;
    }

    .scroller {
      height: 100%;
      width: 100%;
      overflow-y: auto;
      scroll-behavior: auto; /* disable default smooth scroll */
      -webkit-overflow-scrolling: touch;
    }

    .section {
      height: 100vh;
      user-select: none;
    }
/* 
    .section-1 { background: #2b6cb0; }
    .section-2 { background: #dd6b20; }
    .section-3 { background: #2f855a; }
    .section-4 { background: #5a67d8; }
    .section-5 { background: #c53030; } */

    .dummy-black  { background: #000; }
    .dummy-maroon { background: #800000; }