body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    color: #343a40;
}
.wrapper {
    flex: 1;
}
header {
    background-color: #343a40;
    color: white;
    padding: 2rem 0;
    text-align: center;
}
nav {
    display: flex;
    justify-content: center;
    background-color: #495057;
}
nav a {
    color: white;
    padding: 1rem;
    text-decoration: none;
    text-transform: uppercase;
    transition: background-color 0.3s ease;
}
nav a:hover {
    background-color: #6c757d;
}
main.article-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
article {
    line-height: 1.6;
}
article h2 {
    color: #343a40;
    margin-bottom: 1rem;
}
article h3 {
    color: #495057;
    margin-top: 1.5rem;
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 0.5rem;
}
pre {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 1rem;
    overflow-x: auto;
}
pre code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1rem;
}
.article-image {
    display: block;
    max-width: 100%;
    margin: 1.5rem 0;
}
footer {
    text-align: center;
    padding: 1rem 0;
    background: #343a40;
    color: white;
    margin-top: auto;
    border-top: 2px solid #495057;
}