.fa {
    display: inline-block;
}
.fa-search:before {
    content: '';
    background-image: url(../svg/search-solid.svg);
    display: inline-block;
    width: 13px;
    height: 13px;
    vertical-align: middle;
}
.fa-envelope::before {
    content: '';
    background-image: url(../svg/envelope-solid.svg);
    display: inline-block;
    width: 13px;
    height: 13px;
    vertical-align: middle;
}
.fa-phone::before {
    content: '';
    background-image: url(../svg/phone-alt-solid.svg);
    display: inline-block;
    width: 13px;
    height: 13px;
    vertical-align: middle;
}