.level-control {
    display: flex;
    overflow: hidden;
    flex-direction: column;

    border-radius: 12px;
    background-color: #fff;
    box-shadow: 0 2px 6px 0 rgba(0, 0, 0, 0.2);
}

.level-control button {
    width: 40px;
    height: 40px;

    font-size: 14px;
    cursor: pointer;

    color: #4d4d4d;
    border: none;
    background: none;
}

.level-control button:hover {
    color: #000;
}

.level-control button.active {
    color: #fff;
    background-color: #4d4d4d;
}