body {
  background-color: #444444;
}

div.body {
  background-color: #ffffff;
  margin-bottom: 100px;
  display: flex;
  flex-direction: column;
  margin: auto;
  max-width: 1000px;
  font-family:Geneva, Arial, Helvetica, sans-serif; 
}

div.footer {
  margin: auto;
  max-width: 1000px;
  font-family:Geneva, Arial, Helvetica, sans-serif; 
  text-align: center;
  background-color: #ffffff;
}

table { padding: 0px; border-width: 0px; border-spacing: 0px;  }
td { padding: 0px; border-width: 0px; }
th { padding: 0px; border-width: 0px; }

li.menuitem {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
    break-inside: avoid;
}

li.menuitem a:hover {
    background-color: #555;
    color: white;
}

li.menuitem a {
    display: block;
    color: #000;
    padding: 8px 16px;
    text-decoration: none;
}

li.menuitem a.active {
    background-color: #4CAF50;
    color: white;
}


ul.menu {
    columns: 2;
    -webkit-columns: 2;
    -moz-columns: 2;
    list-style-type: none;
    margin: 0;
    padding: 0;
    //width: 100%;
    background-color: #f1f1f1;
}

colgroup.bodycol {
  max-width="780px"
}

div.header {
  margin: auto;
  max-width: 1000px;
  display: flex;
  align-items: center; 
  background-color: #ffffff;
}

div.content {
  width: 100%;
  padding-left: 10px;
  padding-right: 10px;
  box-sizing: border-box;
}

/* Small screens */
/* The menu appears in two columns */
div.footerleft {
  width: 0%; 
  display: none;
}

div.footerright {
  width: 100%; 
  margin: auto;
}

div.menu {
    top: 0px;
    border-style: none;
    column-count: 1;
    display: block;
    height: 100%;
    vertical-align: top;
    box-sizing: border-box;
}

/* Medium screens */
/* The menu appears in 3 columns */
@media (min-width: 510px)
{
  ul.menu {
    columns: 3;
    -webkit-columns: 3;
    -moz-columns: 3;
  }
}

/* Big screens */
/* The menu appears to the left */
@media (min-width: 770px)
{
  ul.menu {
    columns: 1;
    -webkit-columns: 1;
    -moz-columns: 1;
  }

  div.menu {
    position: absolute;
    top: 0px;
    width: 22.222%;  
    max-width: 22.222%;  
    border-style: none;
    border-right: 10px solid white;
    column-count: 1;
    display: block;
    height: 100%;
    vertical-align: top;
    box-sizing: border-box;
  }

  div.content {
    min-height: 450px;
    padding-left: 22.222%;
    width: 100%;
    vertical-align: top;
  }

  div.footer {
    margin: auto;
    max-width: 1000px;
    font-family:Geneva, Arial, Helvetica, sans-serif; 
    box-sizing: border-box;
    display: flex; 
  }


  div.footerleft {
    width: 22.222%; 
    height: 100%;
    display: block;
  }

  div.footerright {
    width: 77.778%; 
    height: 100%;
    padding-right: 10px;
    box-sizing: border-box;
  }

  div.body {
    display: flex;
    flex-direction: row;
    vertical-align: top;
    position: relative;
  }
}