height 100% doesn't work, two divs inside div

Answer 1

The example below illustrates how to assign 100% height or width to a div contained inside other divs

HTML Code:

Hello World

CSS Code:

html,body{height:100%;}

.container {
     height:100%;
}

.fill{
   width:100%;
   height:100%;
   min-height:100%;
   background-color:#990000;
   padding:10px;
   color:#efefef;
}