main #filter {
    display: flex;
    flex-wrap: wrap;
}

main #filter #search-input-wrapper {
    width: 70%;
    position: relative;
}

main #filter #category-input-wrapper {
    width: calc(30% - 5px);
    margin-left: 5px;
}

main #filter #search-input-wrapper i {
    position: absolute;
    top: 52%;
    transform: translateY(-50%);
    left: 10px;
}

main #filter #category-input-wrapper select,
main #filter #search-input-wrapper input {
    width: 100%;
    padding: 10px 10px 10px 35px;
}

@media only screen and (max-width: 640px) {
    main #filter #search-input-wrapper,
    main #filter #category-input-wrapper {
        width: 100%;
        margin: 0 0 5px 0;
    }

    main #filter {
        width: 100%;
        flex-direction: column;
    }

    main #filter #category-input-wrapper select,
    main #filter #search-input-wrapper input {
        height: 50px;
    }
}