body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    margin: 0;
    padding: 20px;
}

article {
    max-width: 800px;
    margin: 2em auto;
    padding: 1em 2em;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    background-color: #fff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

header {
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 2em;
    padding-bottom: 1em;
    text-align: center;
}

h1 {
    color: #212529;
    font-size: 2.2em;
    margin: 0;
}

h2 {
    color: #343a40;
    font-size: 1.5em;
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 0.3em;
    margin-top: 1.5em;
}

p, ul, ol, table, pre {
    margin-bottom: 1em;
}

ul, ol {
    padding-left: 20px;
}

li {
    margin-bottom: 0.5em;
}

a {
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

code, pre {
    font-family: "Menlo", "Consolas", monospace;
    background-color: #f1f3f5;
    border-radius: 4px;
    font-size: 0.9em;
}

code {
    padding: 0.2em 0.4em;
}

pre {
    padding: 1em;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid #dee2e6;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

th {
    background-color: #f8f9fa;
    font-weight: bold;
}

tr:hover {
    background-color: #f1f3f5;
}

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

nav li {
    margin: 0.5em 0;
}