body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav {
    background-color: #333;
    color: #fff;
    padding: 10px;
}

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

nav ul li {
    display: inline;
    margin-right: 10px;
}

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

header {
    background-color: #f5f5f5;
    padding: 20px;
}

main {
    padding: 20px;
}

.content-area {
    max-width: 900px;
    margin: 0 auto;
    padding: 50px;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px;
}

.code-snippet {
    background-color: #f5f5f5;
    padding: 10px;
    border: 1px solid #ccc;
    margin-bottom: 10px;
    position: relative;
}

#code {
    white-space: pre-wrap;       /* Since CSS 2.1 */
    white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
    white-space: -pre-wrap;      /* Opera 4-6 */
    white-space: -o-pre-wrap;    /* Opera 7 */
    word-wrap: break-word;       /* Internet Explorer 5.5+ */
}

button {
    position: absolute;
    top: 5px;
    right: 5px;
}