thead {
    background-color: blue; 
    text-transform: uppercase;
    color: white;
}
table {
    width:80% ;
    margin: auto;
    border-collapse: collapse;
    box-shadow: 0 0 15px gray;
}
.row-dark{
    background-color: silver;
}
.form-container{
    width: 600px;
    margin: 80px auto;
    background: white;
    padding: 40px;
    border-radius: 25px;
    box-shadow: 0 0 25px lightgray;
}