body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.breadcrumb{background:var(--bg-tertiary,#f8f9fa)!important;border-bottom:1px solid #e9ecef!important;padding:.75rem 0 .75rem 48px!important;font-size:12px!important}.breadcrumb ol{list-style:none!important;margin:0!important;padding:0!important}.breadcrumb li,.breadcrumb ol{display:flex!important;align-items:center!important}.breadcrumb li:not(:last-child):after{content:"/"!important;margin:0 .5rem!important;color:var(--text-muted,#1f2837)!important}.breadcrumb a{color:var(--primary-500,#fff)!important;text-decoration:none!important}.breadcrumb a:hover{text-decoration:underline!important}.breadcrumb .separator{color:#6c757d!important;margin:0 5px!important}.breadcrumb .current{color:#6c757d!important;font-weight:500!important}:root{--primary-500:#2563eb;--primary-600:#1d4ed8;--primary-50:#eff6ff;--primary-100:#dbeafe;--text-primary:#1f2937;--text-secondary:#4a5568;--text-muted:#6b7280;--text-white:#fff;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-dark:#1f2937;--bg-dark-hover:#374151;--border-light:#e2e8f0;--border-medium:#d1d5db;--accent-green:#48bb78;--accent-blue:#3182ce;--accent-red:#f56565}[data-theme=dark]{--primary-500:#60a5fa;--primary-600:#3b82f6;--primary-50:#1e293b;--primary-100:#334155;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--text-white:#fff;--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-dark:#020617;--bg-dark-hover:#0f172a;--border-light:#334155;--border-medium:#475569;--accent-green:#22c55e;--accent-blue:#3b82f6;--accent-red:#ef4444}[data-theme=green]{--primary-500:#16a34a;--primary-600:#15803d;--primary-50:#f0fdf4;--primary-100:#dcfce7;--text-primary:#14532d;--text-secondary:#166534;--text-muted:#22c55e;--text-white:#fff;--bg-primary:#fff;--bg-secondary:#f0fdf4;--bg-tertiary:#dcfce7;--bg-dark:#14532d;--bg-dark-hover:#166534;--border-light:#bbf7d0;--border-medium:#86efac;--accent-green:#22c55e;--accent-blue:#3b82f6;--accent-red:#ef4444}[data-theme=purple]{--primary-500:#8b5cf6;--primary-600:#7c3aed;--primary-50:#faf5ff;--primary-100:#f3e8ff;--text-primary:#4c1d95;--text-secondary:#5b21b6;--text-muted:#7c3aed;--text-white:#fff;--bg-primary:#fff;--bg-secondary:#faf5ff;--bg-tertiary:#f3e8ff;--bg-dark:#4c1d95;--bg-dark-hover:#5b21b6;--border-light:#ddd6fe;--border-medium:#c4b5fd;--accent-green:#22c55e;--accent-blue:#3b82f6;--accent-red:#ef4444}[data-theme=orange]{--primary-500:#f97316;--primary-600:#ea580c;--primary-50:#fff7ed;--primary-100:#ffedd5;--text-primary:#9a3412;--text-secondary:#c2410c;--text-muted:#ea580c;--text-white:#fff;--bg-primary:#fff;--bg-secondary:#fffbeb;--bg-tertiary:#fff7ed;--bg-dark:#9a3412;--bg-dark-hover:#c2410c;--border-light:#fed7aa;--border-medium:#fdba74;--accent-green:#22c55e;--accent-blue:#3b82f6;--accent-red:#ef4444}.theme-selector{position:fixed;top:20px;right:20px;z-index:1000;border:1px solid var(--border-light);border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.theme-selector,.theme-selector select{background:var(--bg-primary);padding:.5rem}.theme-selector select{color:var(--text-primary);border:1px solid var(--border-light);border-radius:6px;font-size:.9rem;cursor:pointer}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--text-primary);background:var(--bg-primary)}.container{margin:0 auto;padding:0 20px}header.unified-header{background:linear-gradient(135deg,var(--primary-500) 0,var(--primary-600) 100%);box-shadow:0 4px 20px rgba(0,0,0,.15);position:-webkit-sticky;position:sticky;top:0;z-index:1000;padding:4px 0}header.unified-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');opacity:.3}.header-content{justify-content:space-between;position:relative;z-index:1;gap:2rem}.header-content,.logo-section{display:flex;align-items:center}.logo-section{gap:1rem;text-decoration:none;transition:transform .3s ease;flex-shrink:0}.logo-section:hover{transform:translateY(-2px)}.logo-icon{font-size:2.5rem;background:hsla(0,0%,100%,.15);width:60px;height:60px;display:flex;align-items:center;justify-content:center;border-radius:15px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 4px 16px rgba(0,0,0,.1);border:2px solid hsla(0,0%,100%,.2);transition:transform .3s ease}.logo-section:hover .logo-icon{transform:rotate(5deg)}.logo-text{display:flex;flex-direction:column;gap:.2rem}.logo-text h1{color:var(--text-white);font-size:1.5rem;font-weight:700;margin:0;letter-spacing:-.5px;text-shadow:0 2px 10px rgba(0,0,0,.2)}.logo-text .tagline{color:hsla(0,0%,100%,.85);font-size:.7rem;font-weight:400;letter-spacing:1px;text-transform:uppercase}.header-nav{flex:1 1}h1{font-size:2.5rem;margin-bottom:1rem}.hero{text-align:center;padding:.5rem 0}.hero h1{font-size:1.8rem;margin-bottom:1rem}.hero p{font-size:1rem;opacity:.9}header .container{padding:0 20px}.grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:2rem;gap:2rem}@media (max-width:1200px){.grid{grid-template-columns:repeat(3,1fr)}}@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:600px){.grid{grid-template-columns:1fr}}.card{background:var(--bg-primary);border-radius:12px;box-shadow:0 4px 6px rgba(0,0,0,.05),0 1px 3px rgba(0,0,0,.1);padding:2rem;transition:all .3s ease;border:1px solid var(--border-light)}.card:hover{transform:translateY(-8px);box-shadow:0 20px 25px rgba(0,0,0,.1),0 10px 10px rgba(0,0,0,.04)}.card h3{color:var(--primary-500)}.card h3,.card p{margin-bottom:1rem}.card p{color:var(--bg-dark)}.tech-stack{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0}.tech-tag{padding:.3rem .8rem;border-radius:20px;font-size:.8rem}.btn,.tech-tag{background:var(--primary-500);color:var(--text-white)}.btn{display:inline-block;padding:.8rem 1.5rem;text-decoration:none;border-radius:8px;transition:all .3s ease;font-weight:500;box-shadow:0 2px 4px rgba(37,99,235,.2)}.btn:hover{background:var(--primary-600);transform:translateY(-2px);box-shadow:0 4px 8px rgba(37,99,235,.3)}main{padding:2rem 0}.topic{border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,.1);padding:2rem;margin:1rem 0}.topic h2{margin-bottom:1rem}.section{margin-bottom:4rem}.section h2{text-align:center}.mobile-menu-toggle{display:none;background:hsla(0,0%,100%,.1);border:2px solid hsla(0,0%,100%,.2);color:#fff;font-size:1.5rem;cursor:pointer;padding:.5rem .8rem;border-radius:8px;transition:all .3s ease}.mobile-menu-toggle:hover{background:hsla(0,0%,100%,.2);transform:scale(1.05)}.nav-links{display:flex;justify-content:flex-start;list-style:none;flex-wrap:wrap;margin:0;padding:0;gap:.1rem}.nav-links li{margin:0 .3rem;position:relative}.nav-links a,.nav-links button{color:var(--text-white);text-decoration:none;padding:.3rem .5rem;border-radius:8px;transition:all .3s ease;white-space:nowrap;font-size:.75rem;background:none;border:none;cursor:pointer;font-family:inherit;font-weight:500}.nav-links a:hover,.nav-links button:hover{background:hsla(0,0%,100%,.15);transform:translateY(-2px)}.dropdown{position:relative}.dropdown>button:after{content:" ▼";font-size:.7rem;margin-left:.3rem}.dropdown-content{position:absolute;background:var(--bg-dark);min-width:220px;box-shadow:0 8px 24px rgba(0,0,0,.3);z-index:1001;border-radius:8px;top:100%;left:50%;transform:translateX(-50%) translateY(-10px);border:1px solid hsla(0,0%,100%,.1);opacity:0;visibility:hidden;transition:opacity .2s ease,transform .2s ease,visibility .2s;pointer-events:none}.dropdown-content a{display:block;padding:.8rem 1.2rem;font-size:.85rem;color:var(--text-white);border-radius:0}.dropdown-content a:first-child{border-radius:8px 8px 0 0}.dropdown-content a:last-child{border-radius:0 0 8px 8px}.dropdown-content a:hover{background:var(--bg-dark-hover);transform:translateX(5px)}.dropdown.active .dropdown-content{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);pointer-events:auto}@media (min-width:769px){.dropdown:hover .dropdown-content{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);pointer-events:auto}.dropdown{transition:all .1s ease}}nav:not(.header-nav){background:var(--bg-dark);padding:1rem 0;position:-webkit-sticky;position:sticky;top:0;z-index:100;border-bottom:1px solid var(--bg-dark-hover)}.content-with-sidebar{display:flex;gap:2rem;margin:2rem 0}.sidebar-toc{width:280px;position:-webkit-sticky;position:sticky;top:80px;height:-moz-fit-content;height:fit-content;max-height:calc(100vh - 100px);background:var(--bg-secondary);border:1px solid var(--border-light);color:var(--text-primary);border-radius:12px;overflow-y:auto;box-shadow:0 4px 12px rgba(0,0,0,.05)}.toc-header{padding:1.5rem 1rem 1rem;border-bottom:1px solid var(--border-light);background:var(--bg-tertiary);border-radius:12px 12px 0 0}.toc-header h2{color:var(--text-primary);font-size:14px;margin:0;text-align:center}.toc-nav{padding:1rem 0;color:var(--text-white);background-color:var(--bg-dark)}.toc-nav h3{color:var(--text-primary);font-size:1.1rem;margin:0 0 1rem;text-align:center;padding:0 1rem}.toc-nav ul{list-style:none;padding:0;margin:0}.toc-nav li{margin:0}.toc-nav a{display:block;color:var(--text-white);text-decoration:none;padding:.6rem 1rem;font-size:12px;font-weight:500;border-left:3px solid transparent;transition:all .3s ease}.toc-nav a:hover{padding-left:1.5rem}.toc-nav a.active,.toc-nav a:hover{color:var(--text-primary);background:var(--bg-tertiary);border-left-color:var(--primary-500)}.toc-nav a.active{font-weight:600}.main-content{flex:1 1;min-width:0;max-width:100%}.content{margin:2rem 0;max-width:100%}.topic{background:var(--bg-primary);border-radius:16px;box-shadow:0 8px 32px rgba(0,0,0,.08);padding:2.5rem;margin:0 0 1rem;border:1px solid var(--border-light);overflow:hidden}.topic h1{margin-top:3rem;margin-bottom:1rem;font-size:18px;color:var(--text-primary);font-weight:700;line-height:1.2;background:linear-gradient(135deg,var(--primary-500),var(--primary-600));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.topic h2{margin:2.5rem 0 1.5rem;padding:1rem 1.5rem;background:linear-gradient(135deg,var(--primary-50),var(--primary-100));border-left:5px solid var(--primary-500);border-radius:8px;font-weight:600}.topic h3{font-size:18px;color:var(--primary-600);margin:3rem 0 1rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary-100);font-weight:600}.topic h4{font-size:16px;color:var(--text-primary);margin:1.5rem 0 1rem;font-weight:600}.topic p{line-height:1.8;font-size:14px}.topic ol,.topic p,.topic ul{color:var(--text-secondary);margin:1rem 0}.topic ol,.topic ul{padding-left:2rem}.topic li{margin:.5rem 0;line-height:1.7}.topic strong{color:var(--text-primary);font-weight:600}.topic code{background:linear-gradient(135deg,#f3f4f6,#e5e7eb);color:#dc2626;padding:.2rem .5rem;border-radius:4px;font-family:Fira Code,Monaco,Consolas,monospace;font-size:.9em;border:1px solid #d1d5db}.code-block pre,.topic pre,pre,pre[class*=language-]{background:#1e1e1e!important;color:#d4d4d4!important;padding:1.5rem!important;border-radius:12px!important;overflow-x:auto!important;margin:1.5rem 0!important;border:1px solid #333!important;box-shadow:0 4px 12px rgba(0,0,0,.3)!important;position:relative!important}.code-block pre code,.topic pre code,code[class*=language-],pre code{background:none!important;color:#d4d4d4!important;padding:0!important;border:none!important;font-size:14px!important;line-height:1.8!important;font-family:Fira Code,Monaco,Consolas,monospace!important}.token.comment{color:#6a9955!important;font-style:italic}.token.keyword{color:#569cd6!important;font-weight:700}.token.string{color:#ce9178!important}.token.number{color:#b5cea8!important}.token.class-name{color:#4ec9b0!important}.token.function{color:#dcdcaa!important}.token.operator,.token.punctuation{color:#d4d4d4!important}.token.boolean{color:#569cd6!important}.token.constant{color:#4fc1ff!important}.topic blockquote{background:linear-gradient(135deg,#fef3c7,#fde68a);border-left:4px solid #f59e0b;padding:1rem 1.5rem;color:#92400e;font-style:italic}.topic blockquote,.topic table{margin:1.5rem 0;border-radius:8px}.topic table{width:100%;border-collapse:collapse;background:var(--bg-primary);overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.1)}.topic table th{background:linear-gradient(135deg,var(--primary-500),var(--primary-600));color:var(--text-white);padding:1rem;text-align:left;font-weight:600}.topic table td{padding:1rem;border-bottom:1px solid var(--border-light);color:var(--text-secondary)}.topic table tr:nth-child(2n){background:var(--bg-secondary)}.topic table tr:hover{background:var(--primary-50)}.topic hr{border:none;height:2px;background:linear-gradient(90deg,transparent,var(--primary-500),transparent);margin:2rem 0}.table-of-contents{background:var(--bg-secondary);border:1px solid var(--border-light);color:var(--text-primary);padding:2rem;border-radius:12px;margin:2rem 0;box-shadow:0 4px 12px rgba(0,0,0,.05)}.table-of-contents h2{color:var(--text-primary);text-align:center;margin-bottom:1.5rem;font-size:1.8rem}.toc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:2rem;gap:2rem;margin-top:1.5rem}.toc-column ul{list-style:none;padding:0;margin:0}.toc-column li{margin:.8rem 0}.toc-column a{color:var(--text-secondary);text-decoration:none;padding:.5rem 0;display:block;border-radius:6px;transition:all .3s ease;font-weight:500}.toc-column a:hover{color:var(--text-primary);background:var(--bg-tertiary);padding-left:1rem;transform:translateX(5px)}.section{margin:3rem 0;padding:2rem 0;border-bottom:1px solid var(--border-light);scroll-margin-top:100px}#getting-started{margin-top:0}.section:last-child{border-bottom:none}.section h2{font-size:2rem;color:var(--text-primary);margin-bottom:2rem;text-align:left;padding:1.5rem 2rem;background:linear-gradient(135deg,var(--bg-secondary),var(--bg-tertiary));border-radius:12px;border-left:5px solid var(--primary-500);box-shadow:0 4px 16px rgba(0,0,0,.05);position:relative;font-weight:600}.section h2:before{content:"";position:absolute;left:-5px;top:0;bottom:0;width:5px;background:linear-gradient(135deg,var(--primary-500),var(--primary-600));border-radius:0 3px 3px 0}.subsection{margin:2rem 0;padding:1.5rem;background:var(--bg-secondary);border-radius:12px;border:1px solid var(--border-light)}.subsection h3{font-size:1.4rem;color:var(--text-primary);margin-bottom:1.5rem;padding:1rem 1.5rem;border-left:4px solid var(--primary-500);background:var(--bg-primary);border-radius:8px;font-weight:600;box-shadow:0 2px 8px rgba(0,0,0,.05)}.subsection ul{margin:1rem 0;padding-left:2rem}.subsection li{margin:.5rem 0;color:var(--text-secondary);line-height:1.6}.explanation{background:var(--bg-secondary);border-radius:8px;padding:1.5rem;margin:1.5rem 0;border:1px solid var(--border-light);border-left:4px solid var(--primary-500)}.explanation p{margin-bottom:1rem;font-weight:600;color:var(--text-primary)}.explanation ul{margin:0;padding-left:1.5rem}.explanation li{margin:.5rem 0;color:var(--text-secondary);line-height:1.6}.explanation code{background:var(--bg-dark);color:var(--text-white);padding:.2rem .4rem;border-radius:4px;font-family:Fira Code,monospace;font-size:.85rem}.pillars-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:1.5rem;gap:1.5rem;margin:2rem 0}.pillar{background:var(--bg-primary);border:2px solid var(--border-light);border-radius:12px;padding:1.5rem;text-align:center;transition:all .3s ease;box-shadow:0 4px 12px rgba(0,0,0,.05)}.pillar:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15);border-color:var(--primary-500)}.pillar h4{font-size:1.2rem;margin-bottom:1rem;color:var(--text-primary)}.pillar p{color:var(--text-secondary);line-height:1.6;font-size:.95rem}.comparison-table{margin:2rem 0}.comparison-table h3{font-size:1.4rem;color:var(--text-primary);margin-bottom:1rem;text-align:center}.comparison-table table{width:100%;border-collapse:collapse;background:var(--bg-primary);border-radius:12px;overflow:hidden;box-shadow:0 4px 12px rgba(0,0,0,.1);margin:1rem 0}.comparison-table th{background:linear-gradient(135deg,var(--primary-500) 0,var(--primary-600) 100%);color:var(--text-white);padding:1rem;text-align:left;font-weight:600;font-size:1rem}.comparison-table td{padding:1rem;border-bottom:1px solid var(--border-light);color:var(--text-secondary);line-height:1.6}.comparison-table tr:last-child td{border-bottom:none}.comparison-table tr:nth-child(2n){background:var(--bg-secondary)}.best-practices{margin:3rem 0}.dos-donts{display:grid;grid-template-columns:1fr 1fr;grid-gap:2rem;gap:2rem;margin:2rem 0}.donts,.dos{background:var(--bg-primary);border-radius:12px;padding:2rem;box-shadow:0 4px 12px rgba(0,0,0,.1)}.dos{border-left:4px solid var(--accent-green)}.donts{border-left:4px solid var(--accent-red)}.dos h3{color:var(--accent-green)}.donts h3,.dos h3{margin-bottom:1.5rem;font-size:1.3rem}.donts h3{color:var(--accent-red)}.donts ul,.dos ul{list-style:none;padding:0}.donts li,.dos li{margin:.8rem 0;color:var(--text-secondary);line-height:1.6;position:relative;padding:.5rem 0 .5rem 1.5rem}.dos li:before{content:"✓";color:var(--accent-green)}.donts li:before,.dos li:before{position:absolute;left:0;font-weight:700}.donts li:before{content:"✗";color:var(--accent-red)}.quick-reference{margin:3rem 0}.pattern{background:var(--bg-primary);border:1px solid var(--border-light);border-radius:12px;padding:2rem;margin:1.5rem 0;box-shadow:0 4px 12px rgba(0,0,0,.05)}.pattern h4{color:var(--text-primary);margin-bottom:1rem;font-size:1.2rem;border-bottom:2px solid var(--primary-500);padding-bottom:.5rem}.resources{margin:3rem 0}.resource-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:1.5rem;gap:1.5rem;margin:2rem 0}.resource-category{background:var(--bg-primary);border:1px solid var(--border-light);border-radius:12px;padding:1.5rem;box-shadow:0 4px 12px rgba(0,0,0,.05)}.resource-category h4{color:var(--text-primary);margin-bottom:1rem;font-size:1.1rem;border-bottom:2px solid var(--accent-green);padding-bottom:.5rem}.resource-category ul{list-style:none;padding:0}.resource-category li{margin:.5rem 0;color:var(--text-secondary);line-height:1.6}.resource-category a{color:var(--primary-500);text-decoration:none}.resource-category a:hover{text-decoration:underline}.practice-exercises{background:linear-gradient(135deg,var(--primary-500) 0,var(--primary-600) 100%);color:var(--text-white);border-radius:12px;padding:2rem;margin:2rem 0;box-shadow:0 8px 25px rgba(0,0,0,.15)}.practice-exercises h3{color:var(--text-white);margin-bottom:1.5rem;font-size:1.5rem;text-align:center}.practice-exercises ol{padding-left:1.5rem}.practice-exercises li{margin:1rem 0;line-height:1.6;font-size:1rem}.conclusion{background:var(--primary-50);border:1px solid var(--primary-100);color:var(--text-primary);border-radius:12px;padding:2rem;margin:2rem 0;text-align:center;box-shadow:0 4px 12px rgba(0,0,0,.05)}.conclusion h3{color:var(--text-primary);margin-bottom:1rem;font-size:1.5rem}.conclusion p{line-height:1.7;margin:1rem 0;font-size:1rem}.conclusion p,.overview{color:var(--text-secondary)}.overview{font-size:1.1rem;line-height:1.8;margin:1.5rem 0;padding:1.5rem;background:var(--bg-secondary);border-radius:12px;border:1px solid var(--border-light)}.code-block{background:#1e1e1e;border-radius:16px;margin:2rem 0;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.2);border:1px solid #333;position:relative}.code-block:before{content:"";position:absolute;top:0;left:0;right:0;height:40px;background:linear-gradient(135deg,var(--bg-dark-hover),var(--bg-dark));border-bottom:1px solid var(--border-medium)}.code-block:after{content:"● ● ●";position:absolute;top:12px;left:16px;color:var(--text-muted);font-size:12px;z-index:1}.code-block pre{background:#1e1e1e!important;color:#d4d4d4!important;padding:3rem 2rem 2rem!important;margin:0!important;overflow-x:auto!important;font-family:Fira Code,Monaco,Consolas,Courier New,monospace!important;font-size:.95rem!important;line-height:1.7!important;border-radius:0!important}.code-block code{font-family:Fira Code,Monaco,Consolas,Courier New,monospace;font-size:.95rem;color:#d4d4d4}.code-block .keyword{color:#569cd6;font-weight:700}.code-block .string{color:#ce9178}.code-block .comment{color:#6a9955;font-style:italic}.code-block .number{color:#b5cea8}.code-block .class,.code-block .class-name{color:#4ec9b0}.code-block .function,.code-block .method{color:#dcdcaa}.code-block .operator,.code-block .punctuation{color:#d4d4d4}.code{background:var(--bg-dark);padding:1rem;border-radius:8px;overflow-x:auto;font-family:Fira Code,Monaco,Consolas,Courier New,monospace;font-size:.9rem;line-height:1.6;border:1px solid var(--bg-dark-hover)}.code,.scroll-to-top{color:var(--text-white)}.scroll-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;background:linear-gradient(135deg,var(--primary-500),var(--primary-600));border:none;border-radius:50%;font-size:1.5rem;cursor:pointer;opacity:0;visibility:hidden;transition:all .3s ease;z-index:1001;box-shadow:0 4px 12px rgba(0,0,0,.2)}.scroll-to-top.visible{opacity:1;visibility:visible}.scroll-to-top:hover{transform:translateY(-5px);box-shadow:0 6px 20px rgba(37,99,235,.4)}.scroll-to-top:active{transform:translateY(-2px)}@media (max-width:768px){.scroll-to-top{bottom:10px;right:20px;width:45px;height:45px;font-size:1.3rem}}footer{background:var(--bg-dark)!important;color:var(--text-white);text-align:center;padding:2rem 0;margin-top:3rem;border-top:1px solid var(--bg-dark-hover)}footer a{color:var(--primary-500)}@media (max-width:1024px){.content-with-sidebar{flex-direction:column}.sidebar-toc{width:100%;position:static;max-height:none;order:-1}.toc-nav{max-height:200px;overflow-y:auto}}@media (max-width:768px){header.unified-header{padding:.8rem 0;position:relative}.header-content{flex-wrap:wrap;justify-content:space-between}.logo-section{order:1}.logo-icon{width:50px;height:50px;font-size:2rem;border-radius:12px}.logo-text h1{font-size:1.3rem}.logo-text .tagline{font-size:.65rem}.mobile-menu-toggle{display:block;order:2}.header-nav{order:3;flex-basis:100%;width:100vw;margin-left:calc(-50vw + 50%)}.nav-links{display:none;flex-direction:column;flex-wrap:nowrap;padding:0;background:rgba(0,0,0,.98);border-radius:0;margin:0;width:100vw;max-height:calc(100vh - 100px);overflow-y:auto;gap:0}.nav-links.active{display:flex}.nav-links li{margin:0;width:100%;flex-shrink:0}.nav-links a,.nav-links button{display:block;padding:1rem 1.5rem;border-radius:0;width:100%;text-align:left}.dropdown-content{position:static!important;box-shadow:none!important;background:#374151!important;margin:0!important;border:none!important;border-radius:0!important;min-width:100%!important;transform:none!important;display:none!important;max-height:0;overflow:hidden}.dropdown.active .dropdown-content{display:block!important;opacity:1!important;visibility:visible!important;max-height:none!important}.dropdown-content a{padding:.8rem 2rem!important;border-bottom:1px solid rgba(0,0,0,.2)!important;color:#fff!important}.dropdown>button:after{float:right}h1{font-size:2rem}.hero h1{font-size:1.8rem}.hero p{font-size:.9rem}.section{margin:2rem 0}.section h2{font-size:1.8rem}.subsection h3{font-size:1.3rem}.dos-donts,.pillars-grid,.resource-grid,.toc-grid{grid-template-columns:1fr;gap:1rem}.code-block pre{padding:1rem;font-size:.8rem}.comparison-table{overflow-x:auto}.comparison-table table{min-width:500px}.toc-header{padding:1rem}.toc-nav a{padding:.5rem 1rem;font-size:12px}.card,.topic{padding:1.5rem}.container{padding:0 15px}}@media (max-width:480px){.logo-section{gap:.5rem}.logo-icon{width:40px;height:40px;font-size:1.5rem}.logo-text h1{font-size:.9rem}.logo-text .tagline{font-size:.55rem}.nav-links a,.nav-links button{padding:.8rem 1rem;font-size:.85rem}.header-content{gap:1rem}.hero h1{font-size:1.5rem}.hero p{font-size:.8rem}.topic{padding:1rem}.section h2{font-size:1.5rem}.subsection h3{font-size:1.2rem}.code-block pre{padding:.8rem;font-size:.75rem}.explanation,.pattern,.pillar,.resource-category{padding:1rem}}html{scroll-behavior:smooth}:focus{outline:2px solid var(--primary-500);outline-offset:2px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}.question{background:var(--bg-primary);border-radius:12px;box-shadow:0 4px 6px rgba(0,0,0,.05),0 1px 3px rgba(0,0,0,.1);padding:1.5rem;margin:1.5rem 0;border-left:4px solid var(--accent-green);transition:all .3s ease}.question:hover{transform:translateY(-2px);box-shadow:0 8px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);border-left-color:var(--accent-green)}.question h3{color:var(--text-primary);font-size:1.2rem;margin-bottom:1rem;font-weight:600;display:flex;align-items:center;gap:.5rem}.question p{color:var(--text-secondary);line-height:1.7;margin-bottom:.5rem}.question pre{background:var(--bg-dark-hover);color:var(--text-white);padding:1rem;border-radius:8px;overflow-x:auto;margin:1rem 0;font-size:.9rem;border:1px solid var(--text-secondary)}.question code{font-family:Fira Code,Monaco,Consolas,monospace;font-size:.9rem}.question table{width:100%;border-collapse:collapse;margin:1rem 0;background:var(--bg-secondary);border-radius:8px;overflow:hidden;box-shadow:0 2px 4px rgba(0,0,0,.05)}.question table th{background:var(--primary-500);color:var(--text-white);padding:.8rem;text-align:left;font-weight:600}.question table td{padding:.8rem;border-bottom:1px solid var(--border-light)}.question table tr:last-child td{border-bottom:none}.question table tr:nth-child(2n){background:var(--bg-tertiary)}.question strong{color:var(--text-primary);font-weight:600}.next-topics{background:linear-gradient(135deg,var(--primary-500) 0,var(--primary-600) 100%);color:var(--text-white);border-radius:10px;padding:1.2rem;margin:2rem 0;text-align:center;box-shadow:0 6px 15px rgba(0,0,0,.2)}.next-topics h2{color:var(--text-white);margin-bottom:.8rem;font-size:1.3rem}.next-topics p{color:var(--text-white);opacity:.9;margin-bottom:1rem;font-size:.95rem}.next-topics ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:.8rem;gap:.8rem;margin-top:1rem}.next-topics li{background:hsla(0,0%,100%,.1);padding:.7rem;border-radius:8px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.2);transition:all .3s ease;cursor:pointer;font-size:.9rem}.next-topics li:hover{background:hsla(0,0%,100%,.2);transform:translateY(-1px)}.topic h2{background:var(--bg-secondary);border:1px solid var(--border-light);border-left:4px solid var(--primary-500);color:var(--text-primary);padding:1.5rem;border-radius:12px;text-align:center;margin:2rem 0;font-size:18px;box-shadow:0 4px 12px rgba(0,0,0,.05)}.topic h2:contains("ADVANCED"){background:linear-gradient(135deg,var(--primary-500) 0,var(--primary-600) 100%);box-shadow:0 4px 15px rgba(0,0,0,.3)}@media (max-width:768px){.question{padding:1rem;margin:1rem 0}.question h3{font-size:1.1rem}.question table{font-size:.9rem}.question table td,.question table th{padding:.6rem}.next-topics{padding:1rem}.next-topics ul{grid-template-columns:1fr}.next-topics li{padding:.6rem;font-size:.85rem}}@media (max-width:480px){.question pre{padding:.8rem}.question pre,.question table{font-size:.8rem}}.tabs{display:flex;background:var(--bg-primary);border:1px solid var(--border-light);border-radius:12px;padding:.5rem;margin-bottom:2rem;box-shadow:0 2px 8px rgba(0,0,0,.05);gap:.5rem}.tab-button{background:transparent;border:1px solid var(--border-light);padding:.6rem 1.2rem;cursor:pointer;font-size:.95rem;font-weight:600;color:var(--text-muted);border-radius:8px;transition:all .3s ease;white-space:nowrap}.tab-button:hover{color:var(--text-primary);background:var(--bg-tertiary);border-color:var(--border-medium);transform:translateY(-1px)}.tab-button.active{color:var(--text-white);background:linear-gradient(135deg,var(--accent-green) 0,var(--accent-green) 100%);box-shadow:0 4px 12px rgba(0,0,0,.3);transform:translateY(-2px)}.tab-content{display:none;animation:fadeIn .3s ease-in}.tab-content.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.tabs{padding:.3rem;gap:.3rem}.tab-button{padding:.7rem 1rem;font-size:.95rem}}@media (max-width:480px){.tabs{flex-direction:column;gap:.5rem}.tab-button{padding:.8rem;font-size:.9rem}}.grid-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:1.5rem;gap:1.5rem;margin:2rem 0}.grid-item{background:var(--bg-primary);border-radius:12px;padding:1.5rem;box-shadow:0 4px 12px rgba(0,0,0,.05);transition:all .3s ease;border:1px solid var(--border-light);border-left:4px solid var(--primary-500)}.grid-item:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.15);border-left-color:var(--accent-green)}.grid-item h4{color:var(--text-primary);margin-bottom:1rem;font-size:1.1rem;font-weight:600}.grid-item h4 a{color:var(--text-primary);text-decoration:none;transition:color .3s ease}.grid-item h4 a:hover{color:var(--primary-500)}.grid-item p{color:var(--text-secondary);margin:.5rem 0;line-height:1.6;font-size:.95rem}.grid-item strong{color:var(--text-primary);font-weight:600}@media (max-width:768px){.grid-container{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem}.grid-item{padding:1rem}.grid-item h4{font-size:1rem}.grid-item p{font-size:.9rem}}@media (max-width:480px){.grid-container{grid-template-columns:1fr}}@media (prefers-color-scheme:dark){body{background-color:var(--bg-dark);color:var(--text-white)}.card,.topic{background:var(--bg-primary)}.card,.topic,.topic h2{color:var(--text-primary)}.question{background:var(--bg-primary);border-left-color:var(--accent-green)}.question h3{color:var(--text-primary)}.question p{color:var(--text-secondary)}.question table{background:var(--bg-dark)}.question table tr:nth-child(2n),.tabs{background:var(--bg-dark-hover)}.tab-button{color:var(--text-secondary)}.tab-button:hover{color:var(--text-white);background:var(--bg-dark)}.tab-button.active{color:var(--text-white);background:linear-gradient(135deg,var(--accent-green) 0,var(--accent-green) 100%);box-shadow:0 4px 12px rgba(0,0,0,.4)}.grid-item{background:var(--bg-primary);border-color:var(--border-light)}.grid-item h4 a{color:var(--text-primary)}.grid-item h4 a:hover{color:var(--primary-500)}}.program-example{margin-bottom:3rem;border:1px solid var(--border-light);border-radius:12px;padding:2rem;background:var(--bg-primary);box-shadow:0 4px 12px rgba(0,0,0,.05)}.program-example h3{color:var(--text-primary);margin-bottom:1.5rem;font-size:1.4rem;border-bottom:2px solid var(--primary-500);padding-bottom:.5rem;font-weight:600}.approach-section,.code-section,.complexity-section,.interview-tips,.problem-section{margin-bottom:1.5rem;padding:1.2rem;border-radius:8px;border-left:4px solid}.problem-section{background:#e8f4fd;border-left-color:#2196f3}.approach-section{background:#f3e5f5;border-left-color:#9c27b0}.code-section{background:#e8f5e8;border-left-color:#4caf50}.complexity-section{background:#fff3e0;border-left-color:#ff9800}.interview-tips{background:#fce4ec;border-left-color:#e91e63}.approach-section h4,.code-section h4,.complexity-section h4,.interview-tips h4,.problem-section h4{margin:0 0 .8rem;font-size:1.1rem;font-weight:600;color:var(--text-primary)}.interview-tips ul{margin:0;padding-left:1.2rem}.interview-tips li{margin-bottom:.4rem;color:var(--text-secondary);line-height:1.6}@media (prefers-color-scheme:dark){.problem-section{background:rgba(33,150,243,.1)}.approach-section{background:rgba(156,39,176,.1)}.code-section{background:rgba(76,175,80,.1)}.complexity-section{background:rgba(255,152,0,.1)}.interview-tips{background:rgba(233,30,99,.1)}}@media (max-width:768px){.program-example{padding:1.5rem}.approach-section,.code-section,.complexity-section,.interview-tips,.problem-section{padding:1rem}}