body {
    font-family: sans-serif;
    text-align: center;
}

.container {
    width: 300px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

label {
    display: block;
    margin-bottom: 5px;
}

input[type="number"], select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 3px;
    box-sizing: border-box;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#resultado {
    margin-top: 20px;
    font-weight: bold;
}