body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
}

#bmi-calculator {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f4f4f4;
    border: 1px solid #ccc;
    border-radius: 5px;
    box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.1);
}

h1 {
    margin-bottom: 20px;
}

label {
    display: inline-block;
    width: 100px;
    font-weight: bold;
}

input[type="number"] {
    width: 100px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

select {
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

button {
    display: inline-block;
    margin-top: 10px;
    margin-right: 5px;
    padding: 7px 15px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

button:hover {
    background-color: #555;
}

#result {
    margin-top: 20px;
}

#bmi-value,
#bmi-category {
    font-size: 1.2em;
}