body {
    width: 100vw;
    height: 100vh;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #666;
    font-family: Arial, Helvetica, sans-serif;
}

input {
    height: 40px;
    width: 300px;
    padding: 0 12px;
    border: 1px solid white;
}

#autocomplete {
    position: relative;
}

.optionlist {
    display: flex;
    flex-direction: column;
    position: absolute;
    width: 100%;
    height: 350px;
    overflow: auto;
    overflow-x: hidden;
    top: 100%;
    left: 0;
}

.optionlist .option {
    cursor: pointer;
    border-top: 1px solid #ccc;
    box-sizing: border-box;
    width: 100%;
    padding: 12px;
    background: white;
    font-size: 14px;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.optionlist .option:hover {
    background: #ccc;
}