@import url(https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Syne:wght@400;500;600;700;800&display=swap);:root{--bg-primary:#070b12;--bg-secondary:#0d1421;--bg-card:#111827;--bg-card-hover:#1a2436;--bg-glass:#111827cc;--border:#6366f126;--border-bright:#6366f166;--text-primary:#f0f4ff;--text-secondary:#94a3b8;--text-muted:#4b5563;--accent:#6366f1;--accent-bright:#818cf8;--accent-glow:#6366f14d;--green:#10b981;--green-glow:#10b98133;--red:#ef4444;--yellow:#f59e0b;--blue:#3b82f6;--pink:#ec4899;--purple:#8b5cf6;--font-display:"Syne",sans-serif;--font-body:"Space Grotesk",sans-serif;--font-mono:"JetBrains Mono",monospace;--max-width:1280px;--nav-height:64px;--shadow-glow:0 0 40px #6366f126;--shadow-card:0 4px 24px #0006}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{-webkit-font-smoothing:antialiased;background-color:#070b12;background-color:var(--bg-primary);color:#f0f4ff;color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-family:var(--font-body);font-size:16px;line-height:1.6;overflow-x:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:#070b12;background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#6366f1;background:var(--accent);border-radius:3px}::selection{background:#6366f1;background:var(--accent);color:#fff}a{color:inherit;text-decoration:none}.app{display:flex;flex-direction:column;min-height:100vh}main{flex:1 1;padding-top:64px;padding-top:var(--nav-height)}.container{margin:0 auto;max-width:1280px;max-width:var(--max-width);padding:0 24px}body:before{background-image:radial-gradient(ellipse at 20% 10%,#6366f10d 0,#0000 50%),radial-gradient(ellipse at 80% 90%,#8b5cf60d 0,#0000 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var(--border-bright);color:#f0f4ff;color:var(--text-primary)}.btn-secondary:hover{background:#1a2436;background:var(--bg-card-hover);border-color:#6366f1;border-color:var(--accent)}.btn-ghost{background:#0000;color:#94a3b8;color:var(--text-secondary)}.btn-ghost:hover{background:#111827;background:var(--bg-card);color:#f0f4ff;color:var(--text-primary)}.btn-sm{font-size:12px;padding:6px 14px}.btn-lg{font-size:16px;padding:14px 28px}.card{background:#111827;background:var(--bg-card);border:1px solid #6366f126;border:1px solid var(--border);border-radius:12px;padding:24px;transition:border-color .2s,box-shadow .2s,transform .2s}.card:hover{border-color:#6366f166;border-color:var(--border-bright);box-shadow:0 0 40px #6366f126;box-shadow:var(--shadow-glow)}.card-clickable{cursor:pointer}.card-clickable:hover{transform:translateY(-2px)}.badge{align-items:center;border-radius:20px;display:inline-flex;font-size:11px;font-weight:600;letter-spacing:.5px;padding:3px 10px;text-transform:uppercase}.badge-easy{background:#10b98126;border:1px solid #10b9814d;color:#10b981;color:var(--green)}.badge-medium{background:#f59e0b26;border:1px solid #f59e0b4d;color:#f59e0b;color:var(--yellow)}.badge-hard{background:#ef444426;border:1px solid #ef44444d;color:#ef4444;color:var(--red)}.badge-accent{background:#6366f126;border:1px solid #6366f14d;color:#818cf8;color:var(--accent-bright)}code,pre{font-family:JetBrains Mono,monospace;font-family:var(--font-mono);font-size:13px}pre{background:#0d1117;border:1px solid #6366f126;border:1px solid var(--border);border-radius:8px;color:#e6edf3;line-height:1.7;overflow-x:auto;padding:20px}.loader{align-items:center;display:flex;height:200px;justify-content:center}.spinner{animation:spin .8s linear infinite;border:3px solid #6366f126;border-top-color:#6366f1;border:3px solid var(--border);border-radius:50%;border-top-color:var(--accent);height:40px;width:40px}@keyframes spin{to{transform:rotate(1turn)}}.page-header{padding:60px 0 40px;text-align:center}.page-header h1{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,#f0f4ff,#818cf8);background:linear-gradient(135deg,var(--text-primary),var(--accent-bright));-webkit-background-clip:text;background-clip:text;font-size:clamp(2rem,5vw,3rem);margin-bottom:16px}.page-header p{color:#94a3b8;color:var(--text-secondary);font-size:1.1rem;margin:0 auto;max-width:600px}.search-bar{position:relative}.search-bar input{background:#111827;background:var(--bg-card);border:1px solid #6366f126;border:1px solid var(--border);border-radius:8px;color:#f0f4ff;color:var(--text-primary);font-family:Space Grotesk,sans-serif;font-family:var(--font-body);font-size:14px;padding:12px 16px 12px 44px;transition:border-color .2s;width:100%}.search-bar input:focus{border-color:#6366f1;border-color:var(--accent);box-shadow:0 0 0 3px #6366f14d;box-shadow:0 0 0 3px var(--accent-glow);outline:none}.search-bar input::placeholder,.search-icon{color:#4b5563;color:var(--text-muted)}.search-icon{left:14px;position:absolute;top:50%;transform:translateY(-50%)}.filter-select{background:#111827;background:var(--bg-card);border:1px solid #6366f126;border:1px solid var(--border);border-radius:8px;color:#f0f4ff;color:var(--text-primary);cursor:pointer;font-family:Space Grotesk,sans-serif;font-family:var(--font-body);font-size:14px;padding:10px 16px;transition:border-color .2s}.filter-select:focus{border-color:#6366f1;border-color:var(--accent);outline:none}.algo-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));margin-top:32px}.complexity-badge{align-items:center;background:#6366f11a;border-radius:4px;color:#818cf8;color:var(--accent-bright);display:inline-flex;font-family:JetBrains Mono,monospace;font-family:var(--font-mono);font-size:12px;gap:4px;padding:2px 8px}.tabs{border-bottom:1px solid #6366f126;border-bottom:1px solid var(--border);display:flex;gap:4px;margin-bottom:24px}.tab{background:#0000;border:none;border-radius:8px 8px 0 0;color:#94a3b8;color:var(--text-secondary);cursor:pointer;font-size:14px;font-weight:500;padding:10px 20px;transition:all .2s}.tab:hover{color:#f0f4ff;color:var(--text-primary)}.tab.active,.tab:hover{background:#111827;background:var(--bg-card)}.tab.active{border-bottom:2px solid #6366f1;border-bottom:2px solid var(--accent);color:#818cf8;color:var(--accent-bright)}.step-item{animation:fadeInUp .3s ease;border:1px solid #6366f126;border:1px solid var(--border);border-radius:8px;display:flex;gap:16px;margin-bottom:12px;padding:16px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.step-number{align-items:center;background:#6366f1;background:var(--accent);border-radius:50%;display:flex;flex-shrink:0;font-size:13px;font-weight:700;height:32px;justify-content:center;width:32px}@media (max-width:768px){.container{padding:0 16px}.algo-grid{grid-template-columns:1fr}.page-header{padding:40px 0 24px}}.flex{display:flex}.flex-center{justify-content:center}.flex-between,.flex-center{align-items:center;display:flex}.flex-between{justify-content:space-between}.gap-2{gap:8px}.gap-4{gap:16px}.gap-6{gap:24px}.mt-2{margin-top:8px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-4{margin-bottom:16px}.text-muted{color:#94a3b8;color:var(--text-secondary)}.text-accent{color:#818cf8;color:var(--accent-bright)}.text-green{color:#10b981;color:var(--green)}.text-red{color:#ef4444;color:var(--red)}.text-yellow{color:#f59e0b;color:var(--yellow)}.w-full{width:100%}.relative{position:relative}.hidden{display:none!important}.navbar{border-bottom:1px solid #0000;height:var(--nav-height);left:0;position:fixed;right:0;top:0;transition:background .3s,border-color .3s,-webkit-backdrop-filter .3s;transition:background .3s,border-color .3s,backdrop-filter .3s;transition:background .3s,border-color .3s,backdrop-filter .3s,-webkit-backdrop-filter .3s;z-index:100}.navbar.scrolled{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#070b12e6;border-bottom-color:var(--border)}.navbar-inner{gap:32px;height:100%;margin:0 auto;max-width:var(--max-width);padding:0 24px}.navbar-inner,.navbar-logo{align-items:center;display:flex}.navbar-logo{flex-shrink:0;font-family:var(--font-display);font-size:1.4rem;font-weight:800;gap:8px;letter-spacing:-.5px}.logo-icon{font-size:1.2rem}.logo-accent{color:var(--accent-bright)}.navbar-links{display:flex;flex:1 1;gap:4px;list-style:none;margin-left:16px}.nav-link{border-radius:6px;color:var(--text-secondary);font-size:14px;font-weight:500;padding:6px 14px;transition:color .2s,background .2s}.nav-link:hover{background:var(--bg-card);color:var(--text-primary)}.nav-link.active{background:#6366f11a;color:var(--accent-bright)}.hamburger,.navbar-cta{margin-left:auto}.hamburger{background:none;border:none;cursor:pointer;display:none;flex-direction:column;gap:5px;padding:4px}.hamburger span{background:var(--text-primary);border-radius:2px;display:block;height:2px;transition:transform .3s,opacity .3s;width:22px}.hamburger.open span:first-child{transform:translateY(7px) rotate(45deg)}.hamburger.open span:nth-child(2){opacity:0}.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-menu{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#070b12f7;border-bottom:1px solid var(--border);display:none;flex-direction:column;gap:4px;opacity:0;padding:16px 24px 20px;pointer-events:none;transform:translateY(-10px);transition:all .3s}.mobile-menu.open{opacity:1;pointer-events:all;transform:translateY(0)}.mobile-link{border-radius:8px;color:var(--text-secondary);font-size:15px;font-weight:500;padding:10px 14px;transition:all .2s}.mobile-link.active,.mobile-link:hover{background:var(--bg-card);color:var(--text-primary)}@media (max-width:768px){.navbar-cta,.navbar-links{display:none}.hamburger,.mobile-menu{display:flex}}.footer{background:var(--bg-secondary);border-top:1px solid var(--border);margin-top:80px;padding:60px 0 32px}.footer-grid{grid-gap:48px;display:grid;gap:48px;grid-template-columns:2fr 1fr 1fr 1fr;margin-bottom:48px}.footer-logo{align-items:center;display:flex;font-family:var(--font-display);font-size:1.3rem;font-weight:800;gap:8px;margin-bottom:16px}.footer-tagline{color:var(--text-secondary);font-size:14px;line-height:1.7;max-width:280px}.footer-col h4{color:var(--text-muted);font-family:var(--font-body);font-size:12px;font-weight:600;letter-spacing:1px;margin-bottom:16px;text-transform:uppercase}.footer-col a{color:var(--text-secondary);display:block;font-size:14px;padding:4px 0;transition:color .2s}.footer-col a:hover{color:var(--accent-bright)}.footer-bottom{align-items:center;border-top:1px solid var(--border);display:flex;justify-content:space-between;padding-top:24px}.footer-bottom p{color:var(--text-muted);font-size:13px}.footer-tech{font-family:var(--font-mono)}@media (max-width:768px){.footer-grid{gap:32px;grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column;gap:8px;text-align:center}}@media (max-width:480px){.footer-grid{grid-template-columns:1fr}}.hero{align-items:center;display:flex;min-height:100vh;overflow:hidden;position:relative}.hero-bg{inset:0;pointer-events:none;position:absolute;z-index:0}.hero-orb{border-radius:50%;filter:blur(80px);opacity:.4;position:absolute}.hero-orb-1{animation:floatOrb 8s ease-in-out infinite;background:radial-gradient(circle,#6366f166 0,#0000 70%);height:600px;right:-100px;top:-200px;width:600px}.hero-orb-2{animation:floatOrb 10s ease-in-out infinite reverse;background:radial-gradient(circle,#8b5cf64d 0,#0000 70%);bottom:-100px;height:400px;left:-100px;width:400px}@keyframes floatOrb{0%,to{transform:translate(0)}50%{transform:translate(20px,-20px)}}.hero-grid{background-image:linear-gradient(#6366f10a 1px,#0000 0),linear-gradient(90deg,#6366f10a 1px,#0000 0);background-size:60px 60px;inset:0;-webkit-mask-image:radial-gradient(ellipse at center,#000 30%,#0000 80%);mask-image:radial-gradient(ellipse at center,#000 30%,#0000 80%);position:absolute}.hero-content{max-width:800px;padding:100px 24px 80px;position:relative;z-index:1}.hero-eyebrow{align-items:center;background:#6366f11a;border:1px solid #6366f133;border-radius:20px;color:var(--accent-bright);display:inline-flex;font-size:12px;font-weight:600;gap:8px;letter-spacing:2px;margin-bottom:24px;padding:6px 14px;text-transform:uppercase}.eyebrow-dot{animation:pulse 2s infinite;background:var(--accent);border-radius:50%;height:6px;width:6px}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}.hero-title{font-size:clamp(2.8rem,7vw,5rem);font-weight:800;letter-spacing:-2px;line-height:1.1;margin-bottom:24px}.hero-gradient{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,var(--accent-bright) 0,#a78bfa 50%,var(--pink) 100%);-webkit-background-clip:text;background-clip:text}.hero-desc{color:var(--text-secondary);font-size:1.15rem;line-height:1.8;margin-bottom:36px;max-width:560px}.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:48px}.hero-stats{border-top:1px solid var(--border);display:flex;gap:32px;padding-top:32px}.stat{display:flex;flex-direction:column}.stat-value{color:var(--text-primary);font-family:var(--font-display);font-size:1.8rem;font-weight:800}.stat-label{color:var(--text-muted);font-size:12px;letter-spacing:.5px;text-transform:uppercase}.section{padding:100px 0}.section-header{margin:0 auto 64px;max-width:600px;text-align:center}.section-tag{background:#6366f11a;border-radius:20px;color:var(--accent-bright);display:inline-block;font-size:11px;font-weight:700;letter-spacing:2px;margin-bottom:12px;padding:4px 12px;text-transform:uppercase}.section-header h2{font-size:clamp(1.8rem,4vw,2.5rem);letter-spacing:-1px;margin-bottom:16px}.section-header p{color:var(--text-secondary);font-size:1rem}.features-section{background:var(--bg-secondary)}.features-grid{grid-gap:20px;display:grid;gap:20px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.feature-card{display:flex;flex-direction:column;gap:12px}.feature-icon{align-items:center;background:#6366f11a;border-radius:12px;display:flex;font-size:2rem;height:56px;justify-content:center;width:56px}.feature-card h3{font-size:1.1rem}.feature-card p{color:var(--text-secondary);font-size:14px;line-height:1.7}.categories-grid{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}.cat-card{align-items:flex-start;display:flex;gap:16px;text-decoration:none;transition:border-color .2s,transform .2s}.cat-card:hover{border-color:var(--cat-color,var(--accent));transform:translateY(-2px)}.cat-icon{align-items:center;border-radius:10px;display:flex;flex-shrink:0;font-size:1.4rem;height:48px;justify-content:center;width:48px}.cat-body{flex:1 1}.cat-meta{align-items:center;display:flex;gap:8px;margin-bottom:4px}.cat-unit{font-weight:600}.cat-count,.cat-unit{color:var(--text-muted);font-size:11px}.cat-name{font-size:1rem;font-weight:700;margin-bottom:4px}.cat-desc{color:var(--text-secondary);font-size:13px;line-height:1.5}.cat-arrow{flex-shrink:0;font-size:18px;transition:transform .2s}.cat-card:hover .cat-arrow{transform:translateX(4px)}.how-section{background:var(--bg-secondary)}.how-grid{grid-gap:32px;display:grid;gap:32px;grid-template-columns:repeat(4,1fr);position:relative}.how-card{padding:32px 16px;position:relative;text-align:center}.how-step-num{color:#6366f126;display:block;font-family:var(--font-display);font-size:3rem;font-weight:800;line-height:1;margin-bottom:16px}.how-connector{background:var(--border);height:2px;position:absolute;right:-16px;top:32px;width:32px}.how-card h3{font-size:1.05rem;margin-bottom:8px}.how-card p{color:var(--text-secondary);font-size:13px;line-height:1.7}.preview-inner{grid-gap:64px;align-items:center;display:grid;gap:64px;grid-template-columns:1fr 1fr}.preview-text .section-tag,.preview-text h2{margin-bottom:16px}.preview-text h2{font-size:clamp(1.8rem,4vw,2.5rem);letter-spacing:-1px}.preview-text p{color:var(--text-secondary);line-height:1.8;margin-bottom:20px}.preview-list{display:flex;flex-direction:column;gap:8px;list-style:none}.preview-list li{align-items:center;color:var(--text-secondary);display:flex;font-size:14px;gap:8px}.preview-window{background:#0d1117;border:1px solid var(--border);border-radius:12px;box-shadow:0 20px 60px #00000080;overflow:hidden}.window-bar{align-items:center;background:#161b22;border-bottom:1px solid var(--border);display:flex;gap:6px;padding:12px 16px}.dot{border-radius:50%;height:12px;width:12px}.dot-red{background:#ff5f57}.dot-yellow{background:#febc2e}.dot-green{background:#28c840}.window-title{color:var(--text-muted);font-family:var(--font-mono);font-size:12px;margin-left:8px}.preview-code{background:#0000;border:none;border-radius:0;color:#e6edf3;font-size:12px;line-height:1.8;max-height:320px;overflow-y:auto;padding:20px;tab-size:2}.window-output{align-items:center;background:#161b22;border-top:1px solid var(--border);display:flex;gap:12px;padding:12px 20px}.output-label{color:var(--text-muted);font-size:12px}.output-label,.output-val{font-family:var(--font-mono)}.output-val{font-size:13px;font-weight:600}.output-badge{background:#10b9811a;border-radius:20px;color:var(--green);font-size:11px;margin-left:auto;padding:3px 10px}.faq-section{background:var(--bg-secondary)}.faq-list{display:flex;flex-direction:column;gap:8px;margin:0 auto;max-width:720px}.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;overflow:hidden;transition:border-color .2s}.faq-item.open{border-color:var(--border-bright)}.faq-q{align-items:center;background:none;border:none;color:var(--text-primary);cursor:pointer;display:flex;font-family:var(--font-body);font-size:15px;font-weight:600;gap:16px;justify-content:space-between;padding:18px 20px;text-align:left;transition:color .2s;width:100%}.faq-q:hover,.faq-toggle{color:var(--accent-bright)}.faq-toggle{flex-shrink:0;font-size:20px}.faq-a{animation:fadeIn .2s ease;border-top:1px solid var(--border);padding:0 20px 18px}.faq-a p{color:var(--text-secondary);font-size:14px;line-height:1.7;padding-top:14px}.cta-banner{background:linear-gradient(135deg,#6366f114,#8b5cf614);border-top:1px solid var(--border);padding:100px 0}.cta-inner{text-align:center}.cta-inner h2{font-size:clamp(1.8rem,4vw,2.8rem);letter-spacing:-1px;margin-bottom:12px}.cta-inner p{color:var(--text-secondary);font-size:1.05rem;margin-bottom:32px}.cta-inner .hero-cta{justify-content:center}@media (max-width:1024px){.how-grid{grid-template-columns:repeat(2,1fr)}.how-connector{display:none}.preview-inner{grid-template-columns:1fr}}@media (max-width:768px){.section{padding:60px 0}.hero-content{padding:80px 24px 60px}.hero-stats{flex-wrap:wrap;gap:20px}.categories-grid,.features-grid,.how-grid{grid-template-columns:1fr}.hero-cta{flex-direction:column}}.algo-card{display:flex;flex-direction:column;gap:12px;position:relative}.algo-card-header{align-items:flex-start;display:flex;gap:8px;justify-content:space-between}.algo-card-meta{display:flex;flex-wrap:wrap;gap:6px}.bookmark-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;flex-shrink:0;font-size:18px;line-height:1;padding:0;transition:color .2s,transform 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