body {
    font-family: 'Linux Libertine', 'Georgia', 'Times', serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f6f6f6;
    color: #222;
}

.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
}

.sidebar {
    width: 176px;
    padding: 20px;
    background-color: #f6f6f6;
    border-right: 1px solid #a7d7f9;
}

.sidebar-logo {
    margin-bottom: 20px;
    text-align: center;
}

.sidebar-logo img {
    width: 135px;
}

.sidebar h3 {
    font-size: 0.8em;
    color: #444;
    margin: 10px 0 5px;
    padding-bottom: 3px;
    border-bottom: 1px solid #a2a9b1;
}

.sidebar ul {
    list-style-type: none;
    padding-left: 15px;
    margin: 5px 0;
    font-size: 0.85em;
}

.sidebar li {
    margin-bottom: 3px;
}

.sidebar a {
    color: #0645ad;
    text-decoration: none;
}

.sidebar a:hover {
    text-decoration: underline;
}

.main-content {
    flex: 1;
    padding: 20px 25px;
}

.header {
    border-bottom: 1px solid #a2a9b1;
    padding-bottom: 5px;
    margin-bottom: 20px;
}

.page-title {
    font-family: 'Linux Libertine', 'Georgia', 'Times', serif;
    font-size: 1.8em;
    margin: 0;
    padding: 0;
    border-bottom: 1px solid #a2a9b1;
    padding-bottom: 7px;
}

.page-tabs {
    display: flex;
    margin-top: -1px;
    font-size: 0.85em;
}

.page-tabs a {
    display: block;
    padding: 5px 12px;
    color: #0645ad;
    text-decoration: none;
    border: 1px solid transparent;
    border-bottom: none;
    margin-bottom: -1px;
}

.page-tabs a.active {
    background-color: white;
    border-color: #a2a9b1;
    border-bottom: 1px solid white;
}

.page-tabs a:hover:not(.active) {
    text-decoration: underline;
}

.article-intro {
    font-size: 0.95em;
}

.article-intro p:first-of-type {
    font-size: 1.05em;
}

.toc {
    border: 1px solid #a2a9b1;
    background-color: #f8f9fa;
    padding: 10px;
    display: inline-block;
    font-size: 0.85em;
    margin: 15px 0;
}

.toc-title {
    text-align: center;
    font-weight: bold;
    margin-bottom: 5px;
}

.toc-list {
    margin: 0;
    padding-left: 30px;
}

.toc-list li {
    margin: 3px 0;
}

h2 {
    font-family: 'Linux Libertine', 'Georgia', 'Times', serif;
    font-weight: normal;
    font-size: 1.5em;
    border-bottom: 1px solid #a2a9b1;
    padding-bottom: 3px;
}

h3 {
    font-size: 1.2em;
}

a {
    color: #0645ad;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.infobox {
    float: right;
    margin: 0.5em 0 1em 1em;
    padding: 0.2em;
    border: 1px solid #a2a9b1;
    background-color: #f8f9fa;
    font-size: 88%;
    line-height: 1.5em;
    width: 22em;
}

.infobox-title {
    font-size: 1.5em;
    padding: 8px;
    text-align: center;
    margin: 0.2em 0;
}

.infobox-image {
    text-align: center;
    padding: 0.4em;
}

.infobox-image img {
    max-width: 100%;
}

.infobox-caption {
    text-align: center;
    font-size: 0.9em;
}

.infobox table {
    width: 100%;
    border-collapse: collapse;
}

.infobox th {
    vertical-align: top;
    text-align: left;
    padding: 0.2em 0.4em;
    width: 35%;
    background-color: #e9e9e9;
}

.infobox td {
    vertical-align: top;
    padding: 0.2em 0.4em;
}

.references {
    font-size: 0.9em;
}

.reference {
    vertical-align: super;
    font-size: 0.8em;
    color: #0645ad;
    cursor: pointer;
}

.reference-list {
    list-style-type: none;
    padding-left: 20px;
}

.reference-list li {
    margin-bottom: 5px;
    font-size: 0.9em;
}

.reference-number {
    margin-right: 5px;
}

.categories {
    border-top: 1px solid #a2a9b1;
    padding-top: 10px;
    margin-top: 30px;
    font-size: 0.85em;
}

.category-link {
    display: inline-block;
    margin-right: 10px;
}

.edit-section {
    font-size: 0.8em;
    float: right;
    margin-left: 5px;
    color: #0645ad;
    font-weight: normal;
}

.quote {
    font-style: italic;
    color: #333;
    margin: 1em 0;
    padding-left: 20px;
    border-left: 3px solid #ccc;
}

blockquote {
    text-align: center;
    margin: 1em 3em;
    font-style: italic;
}
qauthor {
    display: block;
    text-align: right;
}

.toc-level-3 {
    margin-left: 2em;
}

.toc-level-4 {
    margin-left: 4em;
}

.letter-section h3 {
    border-bottom: 1px solid #000;
  padding-bottom: 5px;
  margin-bottom: 0;
}

/* Mobile responsiveness */
@media (max-width: 800px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: auto;
        border-right: none;
        border-bottom: 1px solid #a7d7f9;
    }
    
    .infobox {
        float: none;
        width: 100%;
        margin: 1em 0;
    }
    .container {
        display: flex;
        flex-direction: column-reverse;   
    }
    body {
        overflow-x: hidden;
    }
}

.qa-pair {
    margin-bottom: 1em;
}

.qa-question {
    font-weight: bold;
    font-size: 1.4em;
}

.inline-image {
    display: inline-block;
    vertical-align: top;
    background-color: #f8f9fa;
    border: 1px solid #a2a9b1;
    margin: 0.5em 1em 1em 0.5em;
    padding: 0.4em;
    text-align: center;
    font-size: 88%;
    line-height: 1.5em;
    min-width: 180px;
    max-width: 220px;
    /* Responsive fallback */
    box-sizing: border-box;
}

.inline-image img {
    max-width: 100%;
    min-width: 120px;
    display: block;
    margin: 0 auto;
}

.inline-image.align-left {
    float: left;
    margin-right: 1em;
    margin-left: 0;
}

.inline-image.align-right {
    float: right;
    margin-left: 1em;
    margin-right: 0;
}

.inline-image.align-center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    float: none;
}

.inline-image .image-caption {
    text-align: center;
    font-size: 0.9em;
    color: #444;
    margin-top: 0.3em;
    padding: 0 0.2em;
    font-style: italic;
    word-break: break-word;
}