diff --git a/assets/css/main.css b/assets/css/main.css
new file mode 100644
index 0000000..94c0bc7
--- /dev/null
+++ b/assets/css/main.css
@@ -0,0 +1,710 @@
+/* ============================================
+   Variables & Reset
+   ============================================ */
+:root {
+    --primary-color: #2563eb;
+    --primary-dark: #1e40af;
+    --secondary-color: #10b981;
+    --text-primary: #1f2937;
+    --text-secondary: #6b7280;
+    --text-light: #9ca3af;
+    --bg-primary: #ffffff;
+    --bg-secondary: #f9fafb;
+    --bg-tertiary: #f3f4f6;
+    --border-color: #e5e7eb;
+    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
+    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
+    --radius: 8px;
+    --radius-lg: 12px;
+    --transition: all 0.3s ease;
+    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+html {
+    scroll-behavior: smooth;
+}
+
+body {
+    font-family: var(--font-sans);
+    color: var(--text-primary);
+    background-color: var(--bg-primary);
+    line-height: 1.6;
+    font-size: 16px;
+}
+
+/* ============================================
+   Container
+   ============================================ */
+.container {
+    max-width: 1400px;
+    margin: 0 auto;
+    padding: 0 20px;
+}
+
+/* ============================================
+   Header
+   ============================================ */
+.site-header {
+    background: var(--bg-primary);
+    border-bottom: 1px solid var(--border-color);
+    position: sticky;
+    top: 0;
+    z-index: 100;
+    box-shadow: var(--shadow-sm);
+    backdrop-filter: blur(10px);
+    background-color: rgba(255, 255, 255, 0.95);
+}
+
+.header-content {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 1rem 0;
+    gap: 2rem;
+}
+
+.logo-section {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+}
+
+.logo-link {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+    text-decoration: none;
+    color: var(--text-primary);
+    transition: var(--transition);
+}
+
+.logo-link:hover {
+    opacity: 0.8;
+}
+
+.logo-img {
+    width: 50px;
+    height: 50px;
+    border-radius: var(--radius);
+}
+
+.site-title {
+    font-size: 1.5rem;
+    font-weight: 700;
+    margin: 0;
+}
+
+.header-actions {
+    display: flex;
+    align-items: center;
+    gap: 1.5rem;
+    flex: 1;
+    justify-content: flex-end;
+}
+
+.search-container {
+    position: relative;
+    flex: 1;
+    max-width: 500px;
+}
+
+.search-icon {
+    position: absolute;
+    left: 1rem;
+    top: 50%;
+    transform: translateY(-50%);
+    color: var(--text-secondary);
+    pointer-events: none;
+}
+
+.search-input {
+    width: 100%;
+    padding: 0.75rem 1rem 0.75rem 3rem;
+    border: 2px solid var(--border-color);
+    border-radius: var(--radius);
+    font-size: 1rem;
+    transition: var(--transition);
+    background: var(--bg-secondary);
+}
+
+.search-input:focus {
+    outline: none;
+    border-color: var(--primary-color);
+    background: var(--bg-primary);
+    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
+}
+
+.search-clear {
+    position: absolute;
+    right: 0.5rem;
+    top: 50%;
+    transform: translateY(-50%);
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    cursor: pointer;
+    padding: 0.5rem;
+    border-radius: var(--radius);
+    transition: var(--transition);
+}
+
+.search-clear:hover {
+    color: var(--text-primary);
+    background: var(--bg-tertiary);
+}
+
+.github-link {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    padding: 0.75rem 1.5rem;
+    background: var(--bg-secondary);
+    color: var(--text-primary);
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: var(--transition);
+    font-weight: 500;
+    white-space: nowrap;
+}
+
+.github-link:hover {
+    background: var(--bg-tertiary);
+    transform: translateY(-1px);
+    box-shadow: var(--shadow-md);
+}
+
+.github-text {
+    display: none;
+}
+
+/* ============================================
+   Search Results
+   ============================================ */
+.search-results {
+    background: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-color);
+    padding: 2rem 0;
+}
+
+.search-results-content h2 {
+    margin-bottom: 1.5rem;
+    color: var(--text-primary);
+}
+
+#search-results-list {
+    display: grid;
+    gap: 1rem;
+}
+
+.search-result-item {
+    background: var(--bg-primary);
+    padding: 1.5rem;
+    border-radius: var(--radius);
+    border: 1px solid var(--border-color);
+    transition: var(--transition);
+}
+
+.search-result-item:hover {
+    box-shadow: var(--shadow-md);
+    transform: translateY(-2px);
+}
+
+.search-result-item h3 {
+    margin-bottom: 0.5rem;
+    color: var(--primary-color);
+}
+
+.search-result-item a {
+    color: var(--primary-color);
+    text-decoration: none;
+    font-weight: 500;
+}
+
+.search-result-item a:hover {
+    text-decoration: underline;
+}
+
+/* ============================================
+   Hero Section
+   ============================================ */
+.hero-section {
+    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
+    color: white;
+    padding: 4rem 0;
+    margin-bottom: 3rem;
+}
+
+.hero-content {
+    text-align: center;
+    max-width: 800px;
+    margin: 0 auto;
+}
+
+.hero-title {
+    font-size: 3rem;
+    font-weight: 700;
+    margin-bottom: 1rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 1rem;
+}
+
+.hero-icon {
+    font-size: 3.5rem;
+}
+
+.hero-description {
+    font-size: 1.25rem;
+    margin-bottom: 1rem;
+    opacity: 0.95;
+}
+
+.hero-subtitle {
+    font-size: 1rem;
+    opacity: 0.9;
+    margin-bottom: 2rem;
+}
+
+.hero-subtitle a {
+    color: white;
+    text-decoration: underline;
+}
+
+.hero-badges {
+    display: flex;
+    justify-content: center;
+    gap: 1rem;
+}
+
+.badge img {
+    height: 30px;
+}
+
+/* ============================================
+   Content Section
+   ============================================ */
+.content-section {
+    padding: 2rem 0 4rem;
+}
+
+.content-wrapper {
+    display: grid;
+    grid-template-columns: 280px 1fr;
+    gap: 3rem;
+    align-items: start;
+}
+
+/* ============================================
+   Sidebar
+   ============================================ */
+.sidebar {
+    position: sticky;
+    top: 100px;
+    max-height: calc(100vh - 120px);
+    overflow-y: auto;
+}
+
+.sidebar-sticky {
+    background: var(--bg-secondary);
+    padding: 1.5rem;
+    border-radius: var(--radius-lg);
+    border: 1px solid var(--border-color);
+}
+
+.sidebar-title {
+    font-size: 1.1rem;
+    font-weight: 600;
+    margin-bottom: 1rem;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    color: var(--text-primary);
+}
+
+.toc-nav {
+    list-style: none;
+}
+
+.toc-nav ul {
+    list-style: none;
+    margin-left: 1rem;
+}
+
+.toc-nav li {
+    margin-bottom: 0.5rem;
+}
+
+.toc-nav a {
+    color: var(--text-secondary);
+    text-decoration: none;
+    font-size: 0.9rem;
+    display: block;
+    padding: 0.25rem 0.5rem;
+    border-radius: 4px;
+    transition: var(--transition);
+}
+
+.toc-nav a:hover {
+    color: var(--primary-color);
+    background: var(--bg-tertiary);
+}
+
+.toc-nav a.active {
+    color: var(--primary-color);
+    background: var(--bg-tertiary);
+    font-weight: 500;
+}
+
+/* ============================================
+   Main Article
+   ============================================ */
+.main-article {
+    background: var(--bg-primary);
+    padding: 2rem;
+    border-radius: var(--radius-lg);
+    border: 1px solid var(--border-color);
+}
+
+.markdown-content {
+    line-height: 1.8;
+}
+
+.markdown-content h1 {
+    font-size: 2.5rem;
+    margin: 2rem 0 1rem;
+    color: var(--text-primary);
+    border-bottom: 2px solid var(--border-color);
+    padding-bottom: 0.5rem;
+}
+
+.markdown-content h2 {
+    font-size: 2rem;
+    margin: 2rem 0 1rem;
+    color: var(--text-primary);
+    border-bottom: 1px solid var(--border-color);
+    padding-bottom: 0.5rem;
+}
+
+.markdown-content h3 {
+    font-size: 1.5rem;
+    margin: 1.5rem 0 1rem;
+    color: var(--text-primary);
+}
+
+.markdown-content h4 {
+    font-size: 1.25rem;
+    margin: 1.25rem 0 0.75rem;
+    color: var(--text-primary);
+}
+
+.markdown-content p {
+    margin-bottom: 1rem;
+    color: var(--text-primary);
+}
+
+.markdown-content ul,
+.markdown-content ol {
+    margin: 1rem 0;
+    padding-left: 2rem;
+}
+
+.markdown-content li {
+    margin-bottom: 0.5rem;
+    color: var(--text-primary);
+}
+
+.markdown-content a {
+    color: var(--primary-color);
+    text-decoration: none;
+    transition: var(--transition);
+    border-bottom: 1px solid transparent;
+}
+
+.markdown-content a:hover {
+    border-bottom-color: var(--primary-color);
+}
+
+.markdown-content code {
+    background: var(--bg-secondary);
+    padding: 0.2rem 0.4rem;
+    border-radius: 4px;
+    font-family: var(--font-mono);
+    font-size: 0.9em;
+    color: var(--primary-dark);
+}
+
+.markdown-content pre {
+    background: var(--bg-secondary);
+    padding: 1rem;
+    border-radius: var(--radius);
+    overflow-x: auto;
+    margin: 1rem 0;
+    border: 1px solid var(--border-color);
+}
+
+.markdown-content pre code {
+    background: none;
+    padding: 0;
+    color: var(--text-primary);
+}
+
+.markdown-content img {
+    max-width: 100%;
+    height: auto;
+    border-radius: var(--radius);
+    margin: 1rem 0;
+}
+
+.markdown-content blockquote {
+    border-left: 4px solid var(--primary-color);
+    padding-left: 1rem;
+    margin: 1rem 0;
+    color: var(--text-secondary);
+    font-style: italic;
+}
+
+.markdown-content table {
+    width: 100%;
+    border-collapse: collapse;
+    margin: 1rem 0;
+}
+
+.markdown-content th,
+.markdown-content td {
+    padding: 0.75rem;
+    border: 1px solid var(--border-color);
+    text-align: left;
+}
+
+.markdown-content th {
+    background: var(--bg-secondary);
+    font-weight: 600;
+}
+
+/* ============================================
+   Footer
+   ============================================ */
+.site-footer {
+    background: var(--bg-secondary);
+    border-top: 1px solid var(--border-color);
+    padding: 3rem 0 1.5rem;
+    margin-top: 4rem;
+}
+
+.footer-content {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+    gap: 2rem;
+    margin-bottom: 2rem;
+}
+
+.footer-section h3 {
+    margin-bottom: 1rem;
+    color: var(--text-primary);
+}
+
+.footer-section p {
+    color: var(--text-secondary);
+    margin-bottom: 0.5rem;
+}
+
+.footer-links {
+    list-style: none;
+}
+
+.footer-links li {
+    margin-bottom: 0.5rem;
+}
+
+.footer-link,
+.footer-links a {
+    color: var(--text-secondary);
+    text-decoration: none;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    transition: var(--transition);
+}
+
+.footer-link:hover,
+.footer-links a:hover {
+    color: var(--primary-color);
+}
+
+.license-link {
+    display: inline-block;
+    text-align: center;
+    color: var(--text-secondary);
+    text-decoration: none;
+}
+
+.license-img {
+    margin-bottom: 0.5rem;
+}
+
+.footer-bottom {
+    text-align: center;
+    padding-top: 2rem;
+    border-top: 1px solid var(--border-color);
+    color: var(--text-light);
+    font-size: 0.9rem;
+}
+
+/* ============================================
+   Responsive Design
+   ============================================ */
+@media (max-width: 1024px) {
+    .content-wrapper {
+        grid-template-columns: 1fr;
+    }
+    
+    .sidebar {
+        position: relative;
+        top: 0;
+        max-height: none;
+    }
+    
+    .sidebar-sticky {
+        position: sticky;
+        top: 100px;
+    }
+}
+
+@media (max-width: 768px) {
+    .header-content {
+        flex-direction: column;
+        align-items: stretch;
+    }
+    
+    .header-actions {
+        flex-direction: column;
+    }
+    
+    .search-container {
+        max-width: 100%;
+    }
+    
+    .github-text {
+        display: inline;
+    }
+    
+    .hero-title {
+        font-size: 2rem;
+        flex-direction: column;
+    }
+    
+    .hero-icon {
+        font-size: 2.5rem;
+    }
+    
+    .hero-description {
+        font-size: 1.1rem;
+    }
+    
+    .main-article {
+        padding: 1.5rem;
+    }
+    
+    .markdown-content h1 {
+        font-size: 2rem;
+    }
+    
+    .markdown-content h2 {
+        font-size: 1.75rem;
+    }
+    
+    .footer-content {
+        grid-template-columns: 1fr;
+    }
+}
+
+@media (max-width: 480px) {
+    .container {
+        padding: 0 15px;
+    }
+    
+    .hero-section {
+        padding: 2rem 0;
+    }
+    
+    .main-article {
+        padding: 1rem;
+    }
+}
+
+/* ============================================
+   Scrollbar Styling
+   ============================================ */
+.sidebar::-webkit-scrollbar {
+    width: 6px;
+}
+
+.sidebar::-webkit-scrollbar-track {
+    background: var(--bg-tertiary);
+    border-radius: 3px;
+}
+
+.sidebar::-webkit-scrollbar-thumb {
+    background: var(--text-light);
+    border-radius: 3px;
+}
+
+.sidebar::-webkit-scrollbar-thumb:hover {
+    background: var(--text-secondary);
+}
+
+/* ============================================
+   Highlighting for search
+   ============================================ */
+.highlight {
+    background: yellow;
+    padding: 0.1rem 0.2rem;
+    border-radius: 3px;
+    font-weight: 500;
+}
+
+/* ============================================
+   Loading and Error States
+   ============================================ */
+.loading-state,
+.error-state {
+    text-align: center;
+    padding: 3rem 2rem;
+    color: var(--text-secondary);
+}
+
+.loading-state i {
+    font-size: 2rem;
+    margin-bottom: 1rem;
+    color: var(--primary-color);
+}
+
+.error-state i {
+    font-size: 2rem;
+    margin-bottom: 1rem;
+    color: #ef4444;
+}
+
+.error-state a {
+    color: var(--primary-color);
+    text-decoration: underline;
+}
+
+.search-section {
+    font-size: 0.85rem;
+    color: var(--text-light);
+    margin-top: 0.5rem;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+}
+