body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header, footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}

main {
    padding: 1rem;
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: #444;
}

form {
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
}

input[type="text"], input[type="number"], button {
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #28a745;
    color: #fff;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #218838;
}

#resposta {
    margin-top: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-left: 4px solid #007bff;
    border-radius: 4px;
}