body{
    background-color: #7fffd4;
    color: #000;
    font-family: 'Trebuchet MS',  sans-serif;
    margin: 10px;
    text-align: center;
}
h1{
    text-align: center;
}
nav{
    text-align: center;
}
#validation{
    text-align: center;
}