html{
    margin: 0px auto;
    width: 960px;
}
#head{

    background-color: darkgreen;
    height: 80px;
    color:white;
    margin-bottom: 20px;
}
img{
    margin-top: 15px;
}
h2{
    margin-top: 15px;
}

button:hover{
    background-color: white;
    color: white;

}