body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    padding-top: 50px;
}

.box {
    border: 1px solid #4a7bb0;
    padding: 20px 30px;
    width: 320px;
}

h3 {
    margin-top: 0;
    font-size: 18px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.form-group label {
    width: 80px;
    font-size: 14px;
}

.form-group input {
    padding: 2px 5px;
    font-size: 14px;
}

.button-row {
    margin-top: 10px;
    margin-bottom: 15px;
}

button {
    padding: 3px 8px;
    font-size: 13px;
    cursor: pointer;
}

.result {
    font-size: 14px;
}