/* Chrome, Safari, Edge, Opera */
input.number-input-without-arrows::-webkit-outer-spin-button,
input.number-input-without-arrows::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Firefox */
input[type=number].number-input-without-arrows {
    -moz-appearance: textfield;
}