body {
    font-family: Arial, sans-serif;
    background: #f2f2f2;
    margin: 0;
    padding: 0;
    text-align: center;
}

h1 {
    margin-top: 20px;
}

form {
    background: white;
    width: 350px;
    margin: 30px auto;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
}

input, select, button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    background: red;
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background: darkred;
}

#mensagem {
    color: red;
    margin-top: 10px;
}