body{
    background: rgba(0,0,0,0.9);
}
.center {
    display: block;
    margin-top: 5%;
    margin-left: auto;
    margin-right: auto;
    width: 20%;
}
form{
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -100px;
    margin-left: -250px;
    width: 500px;
    height: 200px;
    border: 4px dashed #fff;
}
form p{
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 170px;
    color: #ffffff;
    font-family: Arial;
}
form input{
    position: absolute;
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    outline: none;
    opacity: 0;
}
form button{
    margin: 0;
    color: #fff;
    background: #16a085;
    border: none;
    width: 508px;
    height: 35px;
    margin-top: -20px;
    margin-left: -4px;
    border-radius: 4px;
    border-bottom: 4px solid #117A60;
    transition: all .2s ease;
    outline: none;
}
form button:hover{
    background: #149174;
    color: #0C5645;
}
form button:active{
    border:0;
}