.box {
    padding: 1rem 1rem;
    width: 100%;
    color: #333;
    background-color: #eee;
    display: flex;
    flex-flow: row nowrap;
    justify-content: space-between;
    align-items: center;
}

.box:hover,
.box:active,
.box:focus {
    font-weight: bold;
    background-color: #ddd;
}

.arrow {
    font-size: 24px;
    line-height: 20px;
}