:root {
    --bg-color: #f4f4f9;
    --text-color: #333333;
    --accent-color: #007bff;
}
body.dark-mode {
    --bg-color: #121212;
    --text-color: #e0e0e0;
}
body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s;
}
.container {
    max-width: 900px;
    margin: auto;
    padding: 40px 20px;
}
.nav-back {
    margin-bottom: 20px;
    display: inline-block;
    text-decoration: none;
    color: var(--accent-color);
    font-weight: bold;
}
footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    font-size: 0.9em;
    text-align: center;
}
/* Styling für den Markdown-Inhalt */
zero-md {
    display: block;
}