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

header {
    background-color: #333;
    color: #fff;
    padding: 1em;
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin-right: 1em;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 2em;
}

section {
    margin-bottom: 2em;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1em;
    position: fixed;
    bottom: 0;
    width: 100%;
}

canvas {
    max-width: 100%;
    height: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin-bottom: 0.5em;
    }
}