.main {
    padding: 16px;
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: flex-start;
}

/* Calculator Area */

.calculator {
    width: 360px;
    background-color: #f0f0f0;
    padding: 16px;
    outline: solid 1px #000;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 0 auto;
}

.display {
    background-color: #FFF;
    outline: solid 1px #000;
    height: 48px;
    font-size: 24px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: 16px;
}

.buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.row1,
.row2,
.row3,
.row4 {
    display: flex;
    gap: 8px;
}

button {
    background-color: #FAFAFA;
    flex: 1;
    height: 48px;
    font-size: 24px;
}

.operator {
    background-color: #FFCC00;
}

.operator-selected {
    background-color: #ffff7c;
}

/* Website user experience */
h1 {
    text-align: center;
    font-size: 48px;
}

#user-info-box h2 {
    font-size: 32px;
    margin: 0;
}

ol {
    font-size: 20px;
}

#divide-by-zero-warning {
    background-color: yellow;
    color: red;
    font-size: 32px;
}