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

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 20px 0;
}

header h1 {
    margin: 0;
}

header p {
    font-size: 1.2em;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 20px;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1em;
}

nav a:hover {
    text-decoration: underline;
}

/* Layout e design */
main {
    padding: 20px;
}

section {
    margin-bottom: 40px;
}

h2 {
    color: #4CAF50;
}

.imagem-principal {
    width: 100%;
    height: auto;
    margin-top: 20px;
}

form {
    display: flex;
    flex-direction: column;
    max-width: 600px;
    margin: 0 auto;
}

form input, form textarea {
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}

form button {
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

form button:hover {
    background-color: #45a049;
}

/* Responsividade */
@media (max-width: 768px) {
    header {
        padding: 10px 0;
    }

    header h1 {
        font-size: 1.5em;
    }

    header p {
        font-size: 1em;
    }

    nav ul {
        text-align: center;
        padding: 0;
    }

    nav ul li {
        display: block;
        margin-bottom: 10px;
    }
}