styles-checkoutpage.scss

select {
    // A reset of styles, including removing the default dropdown arrow
    appearance: none;
    background-color: transparent;
    border: none;
    padding: 0 1em 0 0;
    margin: 0;
    width: 100%;
    font-family: inherit;
    font-size: inherit;
    cursor: inherit;
    line-height: inherit;
  
    // Stack above custom arrow
    z-index: 1;
  
    // Remove dropdown arrow in IE10 & IE11
    // @link https://www.filamentgroup.com/lab/select-css.html
    &::-ms-expand {
      display: none;
    }
  
    // Remove focus outline, will add on alternate element
    outline: none;
  }

  .select {
    display: grid;
    grid-template-areas: "select";
    align-items: center;
    position: relative;
  
    select,
    &::after {
      grid-area: select;
    }
  
    min-width: 15ch;
    max-width: 30ch;
  
    border: 1px solid var(--select-border);
    border-radius: 0.25em;
    padding: 0.25em 0.5em;
  
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1.1;
  
    // Optional styles
    // remove for transparency
    background-color: #fff;
    background-image: linear-gradient(to top, #f9f9f9, #fff 33%);
  
    // Custom arrow
    &:not(.select--multiple)::after {
      content: "";
      justify-self: end;
      width: 0.8em;
      height: 0.5em;
      background-color: var(--select-arrow);
      clip-path: polygon(100% 0%, 0 0%, 50% 100%);
    }
  }
  
  // Interim solution until :focus-within has better support
  select:focus + .focus {
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border: 2px solid var(--select-focus);
    border-radius: inherit;
  }