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

header {
    background-color: #006666;
    color: white;
    text-align: center;
    padding: 10px;
}

nav ul {
    list-style-type: none;
    padding: 0;
    text-align: center;
}

nav li {
    display: inline;
    margin: 0 5px;
}

nav a {
    color: white;
    text-decoration: none;
}

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

main {
    background-color: white;
    margin: 20px;
    padding: 15px;
}

img {
    width: 100%;
    max-width: 600px;
    display: block;
    margin: 10px auto;
}

button {
    background-color: orange;
    color: white;
    border: none;
    padding: 8px 12px;
    cursor: pointer;
}

button:hover {
    background-color: darkorange;
}

footer {
    background-color: #006666;
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: 20px;
}

p.index
{
    justify-content: center;
}