.reader-layout{margin:2rem 0;width:100%}.reader-article-header{text-align:center;margin-bottom:3rem;font-family:ubuntu,sans-serif}.reader-article-title{font-size:2.5rem;font-weight:700;font-family:ubuntu,sans-serif;color:var(--text-primary);margin:0 0 1rem;line-height:1.2}.reader-article-meta{display:flex;align-items:center;justify-content:center;gap:.5rem;color:var(--text-secondary);font-size:.95rem;margin-bottom:2rem}.reader-meta-separator{color:var(--text-muted)}.reader-article-thumbnail{width:100%;max-height:400px;overflow:hidden;display:flex;align-items:center;justify-content:center;margin-bottom:2rem;border-radius:10px}.reader-article-thumbnail img{width:100%;height:100%;object-fit:cover;object-position:center;border-radius:5px}.reader-left-sidebar{position:fixed;display:flex;left:-260px;top:5rem;width:300px;height:calc(100vh - 5rem);overflow-y:auto;z-index:50;transition:left .3s ease}.reader-left-sidebar.open{left:0}.sidebar-toggle-section{background-color:none;border:none!important;display:block;z-index:50}.reader-sidebar-toggle{position:relative;left:0;top:50%;transform:translateY(-50%);width:40px;height:120px;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-left:none;cursor:pointer;z-index:40;opacity:.2;transition:opacity .3s,background-color .3s}.reader-sidebar-toggle:hover{opacity:1;background-color:var(--accent-primary)}.reader-sidebar-toggle:hover .reader-toggle-icon-btn{color:#fff}.reader-sidebar-toggle.visible{opacity:1}.reader-toggle-icon-btn{font-size:1.2rem;color:var(--text-primary);transition:color .3s;writing-mode:vertical-rl;text-orientation:mixed}.reader-lessons-nav{border:1px solid var(--border-color);background-color:var(--bg-primary);width:100%}.reader-nav-header{display:flex;justify-content:space-between;align-items:center;border-bottom:2px solid var(--border-color);background-color:var(--bg-secondary);padding:1rem}.reader-nav-title{font-size:1rem;font-weight:600;margin:0;color:var(--text-primary);flex:1}.reader-header-icon{display:none;font-size:2rem;color:var(--text-secondary);font-weight:300;line-height:1}.reader-left-sidebar .tree-list{gap:0}.reader-left-sidebar .tree-list-container{border:none;border-bottom:1px solid var(--border-color)}.reader-left-sidebar .tree-list-container:last-child{border-bottom:none}.reader-left-sidebar .tree-list-container-header{padding:.75rem 1rem;border-bottom:none}.reader-left-sidebar .tree-list-item{padding:.65rem 1rem;font-size:.85rem}.reader-left-sidebar .tree-list-enum{width:26px;height:26px;font-size:.8rem}.reader-left-sidebar .tree-list-item .tree-list-enum{margin-left:15px}.reader-left-sidebar .tree-list-container-title{font-size:.9rem}.reader-main-content{min-width:100%;overflow-x:hidden}.reader-article-body{font-size:1.05rem;line-height:1.8;font-family:monospace;color:var(--text-primary);max-width:100%;overflow-x:hidden}.reader-article-body .highlight{margin-top:3rem;margin-bottom:3rem}.reader-article-body .highlight td,.reader-article-body .highlight pre{background-color:#242424!important}.reader-article-body .highlight td pre{padding:.5rem 0;margin:0;border-radius:0}.reader-article-body .highlight table{border-spacing:0;width:100%}.reader-article-body .highlight td:first-child{width:1px;white-space:nowrap;padding-right:.75rem;user-select:none}[data-theme=light] .reader-article-body .highlight td,[data-theme=light] .reader-article-body .highlight pre{background-color:#f6f8fa!important;color:#24292e!important}[data-theme=light] .reader-article-body .highlight div[style],[data-theme=light] .reader-article-body .highlight pre[style],[data-theme=light] .reader-article-body .highlight code{background-color:#f6f8fa!important;color:#24292e!important}[data-theme=light] .reader-article-body .highlight td:first-child code span[style]{color:#57606a!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#e6edf3"]{color:#24292e!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#8b949e"]{color:#1a7f37!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#ff7b72"]{color:#a40e26!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#79c0ff"]{color:#0550ae!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#a5d6ff"]{color:#0a3069!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#7ee787"]{color:#116329!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#f0883e"]{color:#7a3e00!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#d2a8ff"]{color:#6639ba!important}[data-theme=light] .reader-article-body .highlight span[style*="color:#737679"]{color:#57606a!important}[data-theme=dark] .reader-article-body .highlight td,[data-theme=dark] .reader-article-body .highlight pre{background-color:#242424!important}[data-theme=dark] .reader-article-body .highlight div[style]{background-color:#242424!important}.reader-article-body h1{color:var(--color-2)!important}.reader-article-body h2{color:var(--color-2-d2)!important}.reader-article-body h3{color:var(--grey-1)!important}.reader-article-body strong{color:var(--color-3)!important}.reader-article-body a{color:var(--color-4)!important}.reader-article-body h1,.reader-article-body h2,.reader-article-body h3,.reader-article-body h4,.reader-article-body h5,.reader-article-body h6{font-family:ubuntu,sans-serif;font-weight:600;color:var(--text-primary);margin-top:2rem;margin-bottom:1rem;scroll-margin-top:7rem}.reader-article-body h1{font-size:2rem}.reader-article-body h2{font-size:1.75rem}.reader-article-body h3{font-size:1.5rem}.reader-article-body h4{font-size:1.25rem}.reader-article-body p{margin-bottom:1.2rem}.reader-article-body ul,.reader-article-body ol{margin:1rem 0;padding-left:2rem}.reader-article-body li{margin-bottom:.5rem}.reader-article-body code{font-family:courier new,monospace;background-color:var(--bg-secondary);padding:.2rem .4rem;border-radius:3px;font-size:.9em}.reader-article-body pre{background-color:var(--bg-secondary);padding:1rem;border-radius:6px;overflow-x:auto;margin:1.5rem 0;max-width:100%;white-space:pre;word-wrap:normal}.reader-article-body pre code{background-color:initial;padding:0;white-space:pre;word-wrap:normal;display:block}.reader-article-body blockquote{border-left:4px solid var(--accent-primary);padding-left:1rem;margin:1.5rem 0;color:var(--text-secondary);font-style:italic}.reader-article-body img{max-width:100%;height:auto;margin:1.5rem 0;border-radius:5px}.reader-right-sidebar{position:sticky;top:6rem;height:fit-content}.reader-toc-toggle{position:fixed;padding:7px;width:60px;height:60px;right:50px;top:110px;background-color:var(--bg-secondary);border:1px solid var(--grey-3);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:var(--text-primary);transition:opacity .5s ease,background-color .2s,color .2s,border-color .2s}.reader-toc-toggle.faded{opacity:.1}.reader-toc-toggle:hover{opacity:1!important;background-color:var(--grey-3);color:var(--accent-primary);border-color:var(--accent-primary)}.reader-toc-panel{position:fixed;right:50px;top:200px;min-width:250px;max-width:300px;background-color:var(--bg-primary);border:1px solid var(--border-color);box-shadow:0 4px 6px rgba(0,0,0,.1);max-height:calc(80vh - 8rem);overflow-y:auto;display:none;z-index:10}.reader-toc-panel.active{display:block}.reader-toc-header{padding:1rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center;background-color:var(--bg-secondary)}.reader-toc-title{font-size:.9rem;font-weight:600;margin:0;color:var(--text-primary)}.reader-toc-close{background:0 0;border:none;font-size:1.2rem;cursor:pointer;color:var(--text-secondary);padding:0;width:24px;height:24px;display:flex;align-items:center;justify-content:center}.reader-toc-close:hover{color:var(--text-primary)}.reader-toc-list{list-style:none;padding:.75rem;margin:0}.reader-toc-item{margin-bottom:.5rem}.reader-toc-link{display:block;padding:.5rem .75rem;color:var(--text-primary);text-decoration:none;font-size:.85rem;border-radius:4px;transition:all .2s;line-height:1.4}.reader-toc-link:hover{background-color:var(--bg-secondary);color:var(--accent-primary)}.reader-toc-link.active{background-color:var(--accent-primary);color:#fff;font-weight:500}.tree-list-enum{background-color:var(--color-4-d2)}.tree-list-item.current .tree-list-enum{background-color:var(--color-4)!important}.tree-list-container-header:has(+.tree-list-container-content.open) .tree-list-enum{background-color:var(--color-1)!important}.reader-mobile-bottom-bar{display:none}.article-footer{border:1px solid var(--border-color);font-family:monospace;margin-top:2rem}.article-footer-section{padding:1.25rem}.article-footer-section+.article-footer-section{border-top:1px dashed var(--border-color)}.article-footer-label{display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:.75rem}.article-footer-tags .tags{gap:.4rem}.article-footer-tags .tags .tag,.article-footer-tags .tags a{color:var(--grey-1);text-decoration:none}.article-footer-tags .tag:hover{color:var(--white)}.article-footer-tags .tag:has(a):hover a{color:var(--white)}.share-links{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}.share-links a{color:var(--text-secondary);text-decoration:none;border:1px solid var(--border-color);padding:.3rem .75rem;font-family:monospace;font-size:.9rem;transition:border-color .2s,color .2s}.share-links a:hover{border-color:var(--color-3);color:var(--color-3)}.share-links a#permalinkBtn{color:var(--color-2);border-color:var(--color-2)}.share-links a#permalinkBtn.copied{color:var(--bg-primary);background-color:var(--color-2);border-color:var(--color-2)}.article-footer-tips .tips-message{margin-top:0;margin-bottom:.75rem;color:var(--color-3);font-style:italic;font-size:.95rem;line-height:1.6}.article-footer-tips .tips-container{display:flex;flex-wrap:wrap;align-items:center;gap:0;font-size:.95rem;line-height:1.5}.tip-link a{color:var(--grey-1);text-decoration:none;transition:color .2s}.tip-link a:hover{color:var(--accent-primary);text-decoration:underline}.tip-separator{color:var(--text-primary);margin-left:6px;margin-right:6px;font-weight:700}.article-footer-author .author-name{font-size:1.1rem;font-weight:600;color:var(--text-primary);margin:0 0 .5rem}.article-footer-author .author-socials{display:flex;flex-wrap:wrap;align-items:center;gap:0;font-size:.95rem;list-style:none;padding:0;margin:0}.lesson-navigation{margin-top:3rem;padding:2rem 0;border-top:2px solid var(--border-color)}.lesson-nav-buttons{display:flex;gap:1rem;justify-content:space-between;align-items:stretch}.lesson-nav-btn{display:flex;align-items:center;gap:1rem;padding:1rem 1.5rem;border:2px solid var(--grey-1);background-color:initial;text-decoration:none;transition:border-style .3s ease,background-color .3s ease;flex:1;max-width:48%}.lesson-nav-btn a:hover{text-decoration:none}.lesson-nav-btn:not(.disabled){cursor:pointer}.lesson-nav-btn:hover:not(.disabled){border-color:var(--color-3)}.lesson-nav-btn.disabled{opacity:.5;cursor:not-allowed;border-color:var(--text-muted)}.lesson-nav-btn.next-lesson{justify-content:flex-end}.lesson-nav-btn.prev-lesson.disabled{border-color:var(--text-muted)}.lesson-nav-btn.next-lesson.disabled{border-color:var(--text-muted)}.lesson-nav-btn .nav-arrow{font-size:1.5rem;font-weight:700;flex-shrink:0}.lesson-nav-btn.prev-lesson .nav-arrow{color:var(--color-2-d2)}.lesson-nav-btn.next-lesson .nav-arrow{color:var(--color-3-d2)}.lesson-nav-btn.disabled .nav-arrow{color:var(--text-muted)}.lesson-nav-btn .nav-content{display:flex;flex-direction:column;gap:.25rem}.lesson-nav-btn.prev-lesson .nav-content{align-items:flex-start}.lesson-nav-btn.next-lesson .nav-content{align-items:flex-end}.lesson-nav-btn .nav-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;font-weight:600;color:var(--text-secondary)}.lesson-nav-btn .nav-title{font-size:.95rem;font-weight:500;color:var(--text-primary);line-height:1.3}.lesson-nav-btn.disabled .nav-title{color:var(--text-muted)}@media(max-width:1200px){.reader-article-title{font-size:2rem}.reader-main-content{max-width:100%;padding:0 2rem}}@media(max-width:992px){.reader-sidebar-toggle{display:none}.sidebar-toggle-section{display:none}.reader-nav-header{cursor:pointer;transition:background-color .2s;user-select:none}.reader-nav-header:active{background-color:var(--bg-tertiary)}.reader-header-icon{display:block}.reader-left-sidebar{position:fixed;left:0;right:0;top:auto;bottom:-60vh;width:100%;height:60vh;border-right:none;border-top:2px solid var(--border-color);transition:bottom .3s ease;z-index:200;box-shadow:0 -2px 10px rgba(0,0,0,.1);background-color:var(--bg-primary)}.reader-left-sidebar.open{bottom:0;left:0}.reader-mobile-bottom-bar{display:flex;position:fixed;bottom:0;left:0;right:0;height:60px;background-color:var(--grey-5);border-top:1px solid var(--border-color);align-items:center;justify-content:center;cursor:pointer;z-index:190;opacity:1;transition:background-color .3s}.reader-mobile-bottom-bar:active{background-color:var(--accent-secondary)}.reader-mobile-bottom-bar .reader-toggle-text{color:#fff;font-weight:600;font-size:1rem;display:flex;align-items:center;gap:.5rem}.reader-right-sidebar{position:fixed;bottom:70px;right:1rem;top:auto;z-index:100}.reader-toc-panel{position:absolute;right:60px;bottom:80px;min-width:50vw!important;top:auto}.reader-toc-toggle{position:fixed;width:60px;height:60px;top:auto;right:50px;bottom:70px}.reader-main-content{max-width:100%;padding:0 1.5rem 80px}}@media(max-width:768px){.reader-lessons-nav{border:none}.reader-article-title{font-size:1.75rem}.reader-article-meta{font-size:.85rem;flex-wrap:wrap}.reader-article-thumbnail{max-height:250px}.reader-article-body{font-size:1rem}.reader-layout{margin:1rem 0}.reader-main-content{padding:0 1rem}.reader-toc-panel{position:absolute;min-width:200px;max-width:250px}.lesson-navigation{margin:2rem 0;padding:1.5rem 0}.lesson-nav-buttons{flex-direction:column;gap:1rem}.lesson-nav-btn{max-width:100%;padding:1rem}.lesson-nav-btn .nav-title{font-size:.875rem}.lesson-nav-btn .nav-arrow{font-size:1.25rem}.reader-article-body pre{margin:1.5rem -1rem;padding:1rem;border-radius:0;max-width:calc(100vw - 2rem);overflow-x:auto;-webkit-overflow-scrolling:touch}.reader-article-body .highlight{margin:2rem -1rem;max-width:calc(100vw - 2rem);overflow-x:auto;-webkit-overflow-scrolling:touch}.reader-article-body .highlight table{width:auto;min-width:100%;border-collapse:collapse}.reader-article-body .highlight td{white-space:pre}.reader-article-body .highlight td:first-child{position:sticky;left:0;background-color:#242424;z-index:1;border-right:1px solid rgba(255,255,255,.1);padding-right:.5rem}[data-theme=light] .reader-article-body .highlight td:first-child{background-color:#f6f8fa;border-right:1px solid rgba(0,0,0,.1)}.reader-article-body code{word-break:break-word;font-size:.85em}.reader-article-body p code,.reader-article-body li code{word-break:break-word;white-space:normal}.article-footer-section{padding:1rem}.share-links{gap:.5rem}.share-links a{font-size:.85rem;padding:.25rem .6rem}}.reader-sidebar-overlay{display:none;position:absolute;top:0;left:0;right:0;bottom:0;background-color:rgba(0,0,0,.5);z-index:150}.reader-sidebar-overlay.active{display:block}