.book-search .form-group {
    width: 100%;
}

.book-search .input-group {
    width: 100%;
    display: table;
    padding: 20px 10px;
    background: #f5f5f5;
    max-width: 800px;
    background-color: #f5f5f5;
    border-radius: 3px;
    border: 1px solid #DDD;
    z-index: 0;
}

.book-search .input-group-addon {
    padding: 0;
    width: 54px !important;
}

.book-search .btn-search {
    border-radius: 0 4px 4px 0;
    height: 36px;
    margin-top: -1px;
}

@media screen and (max-width:767px) {
    .book-search {
        padding-top: 0;
    }
}