select{
    display: block;
    width: 100%;
    -o-box-sizing: border-box;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

.btn-green {
    background-color: #e4e4e4;
    color: #4c4c4c;
    border: 1px solid #c1c1c1;
    margin-top: 20px;
    }
    
    
    .box-main {
    -webkit-box-shadow: 0px 0px 16px -1px rgba(0,0,0,0.75);
    -moz-box-shadow: 0px 0px 16px -1px rgba(0,0,0,0.75);
    box-shadow: 0px 0px 16px -1px rgba(0,0,0,0.75);
}