html , body{margin: 0px;
  padding: 0px;
  min-height: 100%;
  height: 100%;}
.container {
    width: 100%;
   color: gray;
   min-height: 100%;
   height: auto;
}

nav {
    float: left;
    max-width: 40%;
    margin: 0;
    padding: 1em;
}
aside {height: 100% auto;
    --margin-left: 460px;
    --border-left: 1px solid gray;
    padding: 1em;
    --overflow: hidden;
}