HTML { /*background: yellow;*/ }

.MenuBox-0, .MenuBox-1 { 
  position: relative; /* CHANGE from: fixed; */
  position: fixed; /* CHANGE 20191005 - przewijanie i tło na obu boxach */

  /*min-height: 100vh; /* ADDED / HIDE 20191005 */
  /*height: auto !important; /* ADDED / HIDE 20191005 */

  height: 100% !important; /* ADDED 20191005 */
}
/* ------------------------------------------------------------------------------------------------------------------------ */
.SiteBox-Icon, .SiteBox-Menu { 
  position: fixed; /* CHANGE from: absolute; */
  /*position: absolute; /* CHANGE 20191003 - bo na komórkach się nie przewijało / HIDE 20191005 */

  height: 100% !important; /* obowiązkowo dodatek !important jeżeli w style też jest */
}
/* ------------------------------------------------------------------------------------------------------------------------ */
.MenuBoxIn, .IconBoxIn, .SiteBoxIn { 
  position: relative;

  height: auto;
  min-height: 100%;
  height: auto !important;

  /*background: yellow; */
}
/* ------------------------------------------------------------------------------------------------------------------------ */

/*
08.10.2019 - Mobile
1. Chrome Mobile	68.77%
2. Facebook in-app Browser	10.12%
3. Safari Mobile	9.71%
4. Samsung Browser	9.37%
5. Reszta 2.03%

08.10.2019 - Tablet
1. Chrome Mobile	67.72%
2. Safari Mobile	20.36%
3. Facebook in-app Browser	5.28%
4. Samsung Browser	4.53%
5. Opera	1.19%
6. Reszta 0.92%

08.10.2019 - Mobile
Chrome 85.15%
Samsung Internet 8.48%
Safari 3.01%
Opera 1.46%
Android 0.61%
IEMobile 0.56%

08.10.2019 - Tablet
Chrome 61.14%
Safari 28.98%
Android 5.54%
Firefox 2%
Opera 1.84%
Puffin 0.14%
*/