select.css

.custom-select {
  border: 1px solid rgba(0,0,0,0.25);
  border-radius: 0.2em;
  display: block;
  padding: 0;
  position: relative;
  background: #fff;
  color: rgba(0,0,0,0.7);
  width: 200px;
}
.custom-select select {
  box-sizing: border-box;
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  background: none;
  border: 1px solid transparent;
  border-radius: 0.2em;
  color: inherit;
  font-size: 1em;
  line-height: 1.3;
  margin: 0;
  padding: 0.3em 1.9em 0.5em 0.8em;
  outline: none;
  width: 100%;
}
.custom-select select:focus {
  background-color: transparent;
  outline: none;
  border: 1px solid rgba(0,0,0,0.45);
  box-shadow: 0 0 1px 3px #b4defa;
}
.custom-select:after {
  content: "";
  pointer-events: none;
  position: absolute;
  right: 0.7em;
  margin-top: -0.25em;
  top: 50%;
  width: 6px;
  height: 6px;
  z-index: 2;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 6px solid rgba(0,0,0,0.25);
}
.custom-select:hover {
  border: 1px solid rgba(0,0,0,0.45);
  background: #fff;
}
.custom-select:hover:after {
  border-top: 6px solid rgba(0,0,0,0.45);
}
.custom-select option {
  font-weight: normal;
}
@-moz-document url-prefix() {
  overflow: hidden;
  .custom-select select {
    width: 120%;
    width: calc(100% + 3em);
  }
  .custom-select select:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 #000;
  }
  .custom-select select option {
    backround: #fff;
  }
}
.custom-select select::-ms-expand {
  display: none;
}
.custom-select select:focus::-ms-value {
  background: transparent;
  color: #222;
}