.combo {
    position: relative;
}

.combo-results {
    position: absolute;
    z-index: 1000;
    width: 100%;
    background: white;

    max-height: 260px;
    overflow-y: auto;
}

.combo-list {
    display: flex;
    flex-direction: column;
}

.combo-option {
    text-align: left;
    padding: 0.5rem;
    border: 0;
    background: white;
    cursor: pointer;
}

    .combo-option:hover {
        background: #eee;
    }

.combo-results:empty {
    display: none;
    border: none;
}

.combo-results:not(:empty) {
    display: block;
    border: 1px solid #ccc;
}