#mdViewer {
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 20px;
    background-color: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    font-size: 15px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    max-width: 100%;
    overflow-x: auto;
}

#mdViewer h1,
#mdViewer h2,
#mdViewer h3 {
    margin-top: 1.2em;
    margin-bottom: 0.6em;
    font-weight: 600;
    line-height: 1.25;
}

#mdViewer h1 {
    font-size: 24px;
}

#mdViewer h2 {
    font-size: 20px;
}

#mdViewer h3 {
    font-size: 17px;
}

#mdViewer p {
    margin: 0.5em 0;
}

#mdViewer ul,
#mdViewer ol {
    padding-left: 1.5em;
    margin: 1em 0;
}

#mdViewer code {
    background: #f6f8fa;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 90%;
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
}

#mdViewer pre {
    background: #f6f8fa;
    padding: 12px;
    overflow: auto;
    border-radius: 6px;
    font-size: 90%;
    line-height: 1.45;
    font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
}

#mdViewer blockquote {
    border-left: 4px solid #ccc;
    padding-left: 1em;
    color: #666;
    margin: 1em 0;
}

#mdViewer a {
    color: #007bff;
    text-decoration: none;
}

#mdViewer a:hover {
    text-decoration: underline;
}

#mdViewer table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
}

#mdViewer th,
#mdViewer td {
    border: 1px solid #ddd;
    padding: 8px 12px;
    text-align: left;
    vertical-align: top;
}

#mdViewer th {
    background-color: #f2f2f2;
    font-weight: bold;
}