main.css

body {
    background-color:#F0F0F0;
    padding: 2em;
    font-family: 'Raleway','Source Sans Pro', 'Arial';
}
.right {
    float:right;
    width:600px;
    border:3px solif #73AD21;
    padding:10px;  
}
.left{
    float:left;
    width:600px;
    border:3px solif #ffffff;
    padding:10px;
}
label {

    display:block;
    margin-bottom:10px;
}
input {

    padding:10px;
    width: 50%;
    margin-bottom: 1em;
}
button {

    margin: 2em 0;
    padding: 1em 4em;
    display:block;
}

#instructor {
    padding:1em;
    background-color:#fff;
    margin: 1em 0;
}