• Change the background color and border: You can use the background-color and border properties to change the background color and border of the select dropdown. For example, the following CSS will change the background color to blue and the border to a solid black line:

Code snippet

select {
  background-color: blue;
  border: 1px solid black;
}

• Change the font size and color: You can use the font-size and color properties to change the font size and color of the text in the select dropdown. For example, the following CSS will change the font size to 16px and the color to black:

Code snippet

select {
  font-size: 16px;
  color: black;
}

• Change the appearance of the dropdown arrow: You can use the appearance property to change the appearance of the dropdown arrow. For example, the following CSS will change the arrow to a solid black triangle:

Code snippet

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}
select::after {
  content: "";
  position: absolute;
  top: 13px;
  right: 10px;
  width: 0;
  height: 0;
  border: 6px solid black;
  border-color: black transparent transparent transparent;
}

• Change the behavior of the dropdown: You can use the padding and width properties to change the behavior of the dropdown. For example, the following CSS will add 10px of padding to the left and right of the dropdown and set the width to 200px:

Code snippet

select {
  padding: 10px 0;
  width: 200px;
}

These are just a few ways to style a "select" dropdown with only CSS. You can use the CSS properties to change the appearance and behavior of the dropdown to fit your specific needs.