body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    font-size: 1rem;
    color: #222;
}

h1 {
    color: #003366;
    text-align: center;
    font-size: 2rem;
    font-weight: bold;
    text-transform: uppercase;
    text-shadow: 1px 1px 2px #999;
}

h2 {
    color: #b22222;
    font-size: 1.5rem;
    font-weight: bold;
    text-transform: capitalize;
    text-shadow: 1px 1px 2px #bbb;
}

p {
    color: #222;
    font-size: 1rem;
    font-style: normal;
    text-align: left;
}

ul {
    background-color: #dcdcdc;
    padding: 1rem;
    border: 1px solid black;
    list-style-type: square;
    list-style-position: inside;
    color: #222;
}

a {
    color: #006400;
}

nav {
    background-color: #d9d9d9;
    padding: 1rem;
    margin: 1rem;
    border: 1px solid black;
    text-align: center;
}

nav a {
    text-decoration: none;
    color: #111;
    margin: 0 0.6rem;
    font-weight: bold;
}

nav a:hover {
    color: #b22222;
}

main {
    background-color: white;
    width: 80%;
    margin: 2rem auto;
    padding: 1.5rem;
    border: 1px solid black;
}

header {
    background-color: #cfe8ff;
    padding: 1.5rem;
    border-bottom: 2px solid black;
}

footer {
    background-color: #eeeeee;
    padding: 1rem;
    margin-top: 1rem;
    border-top: 2px solid black;
    text-align: center;
    color: #222;
}

.highlight {
    background-color: yellow;
    font-weight: bold;
}

#intro {
    border: 1px solid black;
    padding: 1rem;
}