/* Estilo básico e limpo para a página */
body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
}

main {
    max-width: 400px;
    margin: 80px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    padding: 32px 24px;
    text-align: center;
}

h1 {
    margin-bottom: 24px;
    font-size: 1.6rem;
    color: #333;
}

form {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 16px;
}

input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    font-size: 1rem;
    border: 1px solid #bbb;
    border-radius: 4px;
}

button {
    padding: 8px 20px;
    font-size: 1rem;
    background: #1976d2;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #135ba1;
}

#mensagem {
    min-height: 22px;
    color: #1976d2;
    margin-top: 10px;
    font-size: 1rem;
}