body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
    color: #fff;
}

nav {
    margin-top: 10px;
}

nav a {
    color: #fff;
    text-decoration: none;
    /*padding: 5px 10px;*/
    padding: 10px 20px;
    margin: 0 5px;
    border-radius: 3px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #444;
}

main {
    width: max(50%, 700px);
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
}

h1, h2, h3 {
    color: #333;
}

pre {
    background-color: #eee;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 5px;
    overflow-x: auto;
}

code {
    font-family: "Courier New", Courier, monospace;
}

.highlight {
    background-color: #e7f3fe;
    border-left: 4px solid #2196F3;
    padding: 10px;
    margin: 20px 0;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px 0;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 20px;
    color: #777;
}