body {
    font-family: 'Open Sans', sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 2rem;
}

form {
    max-width: 400px;
    margin: 0 auto;
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 2rem;
}

.gruppo-input {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
}

.gruppo-input label {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.gruppo-input input {
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
    font-family: inherit;
}

input[type="submit"] {
    width: 100%;
    padding: 1rem;
    background-color: #0056b3;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #004494;
}

@media (min-width: 768px) {
    .gruppo-input {
        flex-direction: row;
        align-items: center;
    }
    .gruppo-input label {
        width: 120px;
        margin-bottom: 0;
        margin-right: 1rem;
    }
    .gruppo-input input {
        flex: 1;
    }
}