.booking-form {
    padding: 0;
    margin: -100px 0 0;
    background: #9b9b9b;
    padding: 40px;
    border-radius: 8px;
}
.booking-form li {
    position: relative;
    list-style: none;
    display: inline-block;
    width: 100%;
    margin: 0 0 5px;
}
@media (min-width: 768px) {
    .booking-form li {
        width: 23%;
        margin-bottom: 0;
    }
}
@media (min-width: 992px) {
    .booking-form li {
        width: 25%;
    }
}
.booking-form li input {
    font-size: 16px;
    height: 54px;
}
.booking-form li i {
    position: absolute;
    top: 50%;
    right: 20px;
    -webkit-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
    font-size: 13px;
    color: #afacac;
}