[CSS] input type="number"에서 위아래 화살표 지우는 방법

<!--html-->
<input type="number" id="Num">

/*css*/
/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

참조 : https://www.w3schools.com/howto/howto_css_hide_arrow_number.asp