.bmi-calculator {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #f9f9f9;
}
.bmi-calculator h3 {
    text-align: center;
}
.bmi-calculator form {
    display: flex;
    flex-direction: column;
}
.bmi-calculator label {
    margin-bottom: 5px;
}
.bmi-calculator input, .bmi-calculator select {
    margin-bottom: 10px;
    padding: 8px;
    font-size: 16px;
}
.bmi-calculator button {
    padding: 10px;
    background-color: #0073aa;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.bmi-calculator button:hover {
    background-color: #005177;
}
#bmi-result {
    margin-top: 20px;
    text-align: center;
}