html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
    .level0 {
        font-size: 24px;        
    }
    
    .level1 {
        font-size: 20px;
    }
   
    .level2 {
        font-size: 18px;
    }
}

.level0bgcolor {
    background-color: gold;
}

.level1bgcolor {
    background-color: lightsteelblue;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}