index.css

body {
	font-family: sans-serif;
	background: #eeeeee;
}
.wrapper {
	margin: 1em auto;
	text-align: left;
}
.sample {
	border: 1px solid #eeeeee;
	background: #ffffff;
	max-width: 30em;
	padding: 1em;
	margin-bottom: 1em;
}
.custom-select {
	position: relative;
}
.select-css {
	display: block;
	font-size: 1em;
	font-family: sans-serif;
	font-weight: 700;
	color: #444;
	line-height: 1.3;
	padding: .6em 1.4em .5em .8em;
	width: 100%;
	max-width: 100%;
	box-sizing: border-box;
	margin: 0;
	border: 1px solid #aaa;
	box-shadow: 0 1px 0 1px rgba(0,0,0,.04);
	border-radius: .25em;
	-moz-appearance: none;
	-webkit-appearance: none;
	appearance: none;
	background-color: #fff;
	position: relative;
	z-index: 10;
}
.select-css::-ms-expand {
	display: none;
}
.select-css:hover {
	border-color: #888;
}
.select-css:focus {
	border: 2px dashed blue; 
	color: #222;
	outline: none;
}
.custom-select-icons {
	position: absolute;
	top: 0.5em;
	right: 0.5em;
	z-index: 20;
	border: 1px solid white;
	background: transparent;
}
.custom-select-options {
	border: 1px solid #aaa;
	border-radius: 0 0 0.25em .25em;
	line-height: 1.5;
	margin: 0;
	margin-top: -0.5em;
	padding: 0;
	list-style-type: none;
	font-weight:normal;
	cursor: pointer;
	z-index: 2;
	position: absolute;
	width: calc(100% - 1px);
	background-color: #ffffff;
}
.custom-select-options li {
	padding: 1em;
}
.custom-select-options li:hover {
	background: blue;
	color: #fff;
	border: 1px solid blue;
	border-width: 0 0 0 1px;
}

.custom-select-options li:focus {
	border: 2px dashed blue;
}
.icon {
		fill: ButtonText;
		pointer-events: none;
	}
@media screen and (-ms-high-contrast: active) {
	.icon {
		fill: ButtonText;
	}
}
.hidden-all {
	display: none;
}
.hidden-visually {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0,0,0,0);
	white-space: nowrap;
	-webkit-clip-path: inset(50%);
	clip-path: inset(50%);
	border: 0;}