body, html {
    margin: 0px;
    padding: 20px;
    background-color: #ededed;
    font-family: 'Arial';
} 
table {    
table-layout: auto;
  width: 50%;  
}
.column-1 {
    width: 30%;
}
.column-2 {
    width: 10%;
}
th, td {
  border: 1px solid black;
  padding-left: 15px;
  text-align: left;
  height: 20px;
}
header {
    width: 50%;
    height: 100px;
    line-height: 100px;
    background-color: #010131;
}
header span {
        color: #fff;
        font-size: 30px;
        padding-left: 20px;
}
nav {
    width: 49%;
    height: 50px;
    background-color: #cccccc;    
    padding-left: 20px;
    padding-top: 10px;
}
a:link {
    font-size: 18px;    
    color: black;
    padding-left: 15px;
}
a:visited {
    color: grey;
}
div.he {
    padding-top: 30px;
    padding-left: 15px;
    width: 49%;
}