/* --- Root Variables for Consistency --- */
:root {
    --wiki-bg: #f6f6f6;
    --wiki-content-bg: #ffffff;
    --wiki-border: #a2a9b1;
    --wiki-text: #202122;
    --wiki-link: #0645ad;
    --wiki-link-hover: #3366bb;
    --wiki-header-bg: #eaecf0;
    --wiki-infobox-title: #cedff2;
    --wiki-active-blue: #3366cc;
}

/* --- Base Styling --- */
body {
    font-family: 'Segoe UI', 'Arial', sans-serif;
    margin: 0;
    display: flex;
    background-color: var(--wiki-bg);
    color: var(--wiki-text);
}

/* --- Navigation Sidebar --- */
.sidebar {
    width: 260px;
    height: 100vh;
    background: #f8f9fa;
    position: fixed;
    border-right: 1px solid var(--wiki-border);
    padding: 20px 10px;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-logo {
    font-family: 'Linux Libertine', 'Georgia', serif;
    font-size: 26px;
    text-align: center;
    border-bottom: 1px solid var(--wiki-border);
    padding-bottom: 15px;
    margin-bottom: 20px;
    color: #000;
}

.sidebar-header {
    font-weight: bold;
    margin: 15px 0 5px 10px;
    font-size: 0.9rem;
    color: #54595d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar ul li {
    margin: 2px 0;
}

.sidebar ul li ul {
    margin-left: 15px; /* Indent sub-sections */
}

.sidebar a {
    display: block;
    text-decoration: none;
    color: var(--wiki-link);
    font-size: 0.88rem;
    padding: 6px 12px;
    border-left: 3px solid transparent;
    transition: all 0.2s ease;
}

.sidebar a:hover {
    background-color: #f0f0f0;
    text-decoration: underline;
}

/* Highlighting the current section (Works with your script.js) */
.sidebar a.active {
    color: var(--wiki-text);
    font-weight: bold;
    background-color: #fff;
    border-left: 3px solid var(--wiki-active-blue);
}

/* --- Main Content Area --- */
.main-content {
    margin-left: 280px; /* Offset for sidebar */
    padding: 40px 60px;
    background: var(--wiki-content-bg);
    max-width: 960px;
    min-height: 100vh;
    box-shadow: 0 0 15px rgba(0,0,0,0.05);
    line-height: 1.6;
}

.top-banner {
    font-size: 0.8rem;
    color: #54595d;
    margin-bottom: 15px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 5px;
}

h1 {
    font-family: 'Linux Libertine', 'Georgia', serif;
    font-size: 2.2rem;
    border-bottom: 1px solid var(--wiki-border);
    padding-bottom: 5px;
    margin-top: 0;
    font-weight: normal;
}

h2 {
    font-family: 'Linux Libertine', 'Georgia', serif;
    font-size: 1.7rem;
    border-bottom: 1px solid var(--wiki-border);
    margin-top: 50px;
    margin-bottom: 15px;
    font-weight: normal;
}

h3 {
    font-size: 1.3rem;
    margin-top: 30px;
    border-bottom: none;
}

p {
    margin-bottom: 1.2em;
    text-align: justify;
}

/* --- Infobox --- */
.infobox {
    float: right;
    width: 320px;
    background-color: #f8f9fa;
    border: 1px solid var(--wiki-border);
    padding: 5px;
    margin: 0 0 20px 25px;
    font-size: 0.85rem;
}

.infobox-title {
    background-color: var(--wiki-infobox-title);
    text-align: center;
    font-weight: bold;
    padding: 10px;
    font-size: 1.1rem;
}

.infobox-img {
    text-align: center;
    padding: 10px;
    background: white;
    border: 1px solid #ddd;
    margin: 8px 5px;
}

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

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

.infobox th {
    text-align: left;
    background: var(--wiki-header-bg);
    padding: 8px;
    border: 1px solid #ddd;
    width: 40%;
}

.infobox td {
    padding: 8px;
    border: 1px solid #ddd;
}

/* --- Wikipedia Thumbnails (Technical Images) --- */
.wiki-thumb-right, .wiki-thumb-left {
    background-color: #f8f9fa;
    border: 1px solid var(--wiki-border);
    padding: 4px;
    margin-bottom: 20px;
    text-align: center;
}

.wiki-thumb-right { float: right; margin-left: 25px; width: 300px; }
.wiki-thumb-left  { float: left; margin-right: 25px; width: 300px; }

.wiki-thumb-right img, .wiki-thumb-left img {
    width: 100%;
    height: auto;
    border: 1px solid #ddd;
    background: #fff;
}

.thumb-caption {
    font-size: 0.8rem;
    padding: 8px;
    text-align: left;
    line-height: 1.4;
    color: #444;
}

/* --- Scientific Data Tables --- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
}

.data-table th {
    background: var(--wiki-header-bg);
    border: 1px solid var(--wiki-border);
    padding: 12px;
    text-align: left;
}

.data-table td {
    border: 1px solid var(--wiki-border);
    padding: 12px;
}

.data-table tr:nth-child(even) {
    background-color: #fcfcfc;
}

/* --- Math and Formula Boxes --- */
.wiki-math-box {
    background-color: #fdfdfd;
    border: 1px solid var(--wiki-border);
    border-left: 5px solid var(--wiki-active-blue);
    padding: 20px;
    margin: 25px 0;
    font-family: 'Times New Roman', serif;
}

.formula {
    text-align: center;
    font-size: 1.4rem;
    margin: 15px 0;
    color: #000;
}

/* --- Image Grids --- */
.wiki-image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.grid-item-wiki {
    border: 1px solid var(--wiki-border);
    background-color: #f8f9fa;
    padding: 10px;
    text-align: center;
}

.grid-item-wiki img {
    max-width: 100%;
    border: 1px solid #ddd;
}

.grid-item-wiki p {
    font-size: 0.8rem;
    margin-top: 10px;
    text-align: center;
}

/* --- Reference List --- */
.reflist {
    font-size: 0.9rem;
    padding-left: 20px;
    border-left: 3px solid var(--wiki-header-bg);
    margin-top: 20px;
}

.reflist p {
    margin-bottom: 10px;
    text-align: left;
}

/* --- Notice Boxes --- */
.wiki-notice-box {
    background-color: #fef6e7;
    border: 1px solid #f59e0b;
    padding: 15px;
    margin: 25px 0;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
}

/* --- Footer --- */
.wiki-footer {
    margin-top: 80px;
    padding: 30px 0;
    border-top: 1px solid var(--wiki-border);
    font-size: 0.8rem;
    color: #54595d;
}

/* --- Responsive Layout --- */
@media (max-width: 1024px) {
    .sidebar { width: 200px; }
    .main-content { margin-left: 220px; padding: 30px; }
    .infobox, .wiki-thumb-right, .wiki-thumb-left {
        float: none;
        width: 100%;
        margin-left: 0;
        margin-right: 0;
    }
}

/* --- Print View Configuration --- */
@media print {
    .sidebar { display: none; }
    .main-content { 
        margin-left: 0; 
        width: 100%; 
        max-width: 100%; 
        box-shadow: none; 
        padding: 0;
    }
    h2 { page-break-before: always; } /* Starts new chapters on new pages */
    .infobox { page-break-inside: avoid; }
}