*{
    box-sizing: border-box;
}
header{
    text-align: center;
    margin-top: 10%;
    margin-bottom: 2%;
    padding-bottom: 10%;
    border-bottom: 10px solid black;
}
.row{
    border-top: 2px solid darkslategrey;
    border-bottom: 2px solid darkslategrey;
}
.time{
    text-align: center;
    margin-top: 5%;
    }
.form{
    border-right: 2px solid slategrey;
    border-left: 2px solid slategrey;
}
button{
    display: block;
    width: 100%;
    height: 100%;
}
.past{
    background: grey;
}
.current{
    background: red;
}
.future{
    background: green;
}