#wrap{
display: table;
width: 100%;
height: 100vh;
}

#wrap article{
display: table-cell;
text-align: center;
vertical-align: middle;
color: #fff;
}


#wrap article dl{
margin-top: 20px;
}

#wrap article dt{
padding: 10px;
}

input[type=submit] {
width: 80%;
margin: 0 auto;
background: #ff7b48;
color: #fff;
padding: 10px 0;
margin-top: 40px;
}