*{margin:0;padding:0}
li,input,button{height:35px;}

html,body{
height:100%;
box-sizing:border-box;
}

html{

height:100%;;
overflow:hidden;

padding-bottom:100px;
background:gray;
}



body{
height:inherit;
overflow:hidden;

box-sizing:border-box;


 
 margin-left:100px;
background:#fefefe;
 
}

#box{
margin-left:100px;

width:600px;
background:yellowgreen;
overflow:scroll;
}



.footer {
  position: fixed;
  right: 0;
width:300px;
 
  height:100px;
  z-index: 1030;
  bottom: 0;
  margin-bottom: 0;
background:green;
  border-width: 1px 0 0;
}