.autocomplete ol {
  display: none;
  margin: 0;
  padding: 3px;
  border: 1px solid gray;
  list-style: none;
}

.autocomplete input {
  -moz-box-sizing: border-box;
  
  box-sizing: border-box;
  margin: 0;
  padding: 1px 0 1px 3px;

  width: 100%;

  border: 1px solid blue;
  border-radius: 3px;
  -webkit-appearance: none;

  font-size: 16px;
}

.autocomplete input:focus {
  outline: none;
}

.autocomplete.open input {
  border-bottom: none;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.autocomplete.open ol {
  display: block;

  background: white;
  z-index: 10000;
  position: relative;
}

.autocomplete {
  width: 400px;
  height: 20px;
}

.autocomplete ol .selected {
  background: blue;
}