#diceDiv {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px;    
}

#diceDiv > div {
    margin: 10px 40px;
}

/* computer와 user를 가운데 배치하는 셀렉터 */
#diceDiv h2 {
    text-align: center;
}

.spo, .spx {
    font-size: 20px;
    font-weight: bold;
}

.spo {
    color: brown;
}

.spx {
    color: blue;
}