nput-group label {
    flex: none;
    width: 150px;
    white-space: nowrap;
    text-align: right;
    margin-right: 20px;
}

.star-input-group input {
    flex: none;
    width: 150px;
}

#starCanvas {
    display: block;
    margin: 20px auto;
}

.operation-selection {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 10px;
    margin-top: 20px;
    font-size: 20px;
}

.operation-selection label {
    flex: none;
    width: 150px;
    white-space: nowrap;
    te