:root{--bg: #07090f;--bg2: #0b0f1a;--surface: rgba(255, 255, 255, .035);--surface2: rgba(255, 255, 255, .065);--surface3: rgba(255, 255, 255, .1);--border: rgba(255, 255, 255, .09);--border2: rgba(255, 255, 255, .16);--text: #e9edf5;--text-dim: #9aa4bb;--text-faint: #626d85;--easy: #34d399;--medium: #fbbf24;--hard: #fb7185;--accent: #7dd3fc;--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;--radius: 16px;--radius-sm: 10px;--shadow: 0 18px 50px -12px rgba(0, 0, 0, .55)}:root[data-theme=light]{--bg: #f5f7fc;--bg2: #eaeef7;--surface: rgba(15, 23, 42, .028);--surface2: rgba(15, 23, 42, .052);--surface3: rgba(15, 23, 42, .085);--border: rgba(15, 30, 60, .1);--border2: rgba(15, 30, 60, .17);--text: #172033;--text-dim: #55617a;--text-faint: #8993a8;--easy: #059669;--medium: #b45309;--hard: #e11d48;--accent: #0284c7;--shadow: 0 18px 44px -16px rgba(30, 41, 90, .28)}:root[data-theme=light] .app-bg{background:radial-gradient(60vw 60vw at 12% -10%,rgba(99,102,241,.14),transparent 60%),radial-gradient(50vw 50vw at 95% 15%,rgba(14,165,233,.12),transparent 55%),radial-gradient(70vw 60vw at 55% 115%,rgba(217,70,239,.1),transparent 60%),linear-gradient(180deg,#eef2fb,#f5f7fc 45%)}:root[data-theme=light] .app-bg:after{background-image:radial-gradient(rgba(30,41,90,.06) 1px,transparent 1.4px)}:root[data-theme=light] .orb{opacity:.32}:root[data-theme=light] .topbar{background:#f5f7fcc7}:root[data-theme=light] .brand-badge{box-shadow:0 6px 20px -6px #6366f180}:root[data-theme=light] ::-webkit-scrollbar-thumb{background:#0f1e3c2e}:root[data-theme=light] .example-card,:root[data-theme=light] .cx-card{box-shadow:var(--shadow)}:root[data-theme=light] .player{background:linear-gradient(180deg,#fff,#eef2fa);border-color:var(--border);box-shadow:var(--shadow)}:root[data-theme=light] .codeblock{background:#f7f8fc;border-color:var(--border)}:root[data-theme=light] .codeblock-head{background:#0f172a09;border-color:var(--border)}:root[data-theme=light] .codeline:hover{background:#0f172a07}:root[data-theme=light] .codeline .ln{color:#0f172a42}:root[data-theme=light] .tk-kw{color:#a626a4}:root[data-theme=light] .tk-str{color:#3f8f3f}:root[data-theme=light] .tk-num{color:#b76b01}:root[data-theme=light] .tk-com{color:#9aa1b0}:root[data-theme=light] .tk-fn{color:#3f6fe0}:root[data-theme=light] .tk-bi{color:#0184bc}:root[data-theme=light] .tk-op{color:#0184bc}:root[data-theme=light] .tk-self{color:#d13a2c}:root[data-theme=light] .tk-dec{color:#b98900}:root[data-theme=light] 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60%),linear-gradient(180deg,var(--bg2),var(--bg) 45%)}.app-bg:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1.4px);background-size:34px 34px;-webkit-mask-image:radial-gradient(80vw 70vh at 50% 0%,#000 20%,transparent 75%);mask-image:radial-gradient(80vw 70vh at 50% 0%,#000 20%,transparent 75%)}.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;animation:orbFloat 22s ease-in-out infinite alternate}@keyframes orbFloat{0%{transform:translate(0) scale(1)}to{transform:translate(60px,-50px) scale(1.15)}}.topbar{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(16px) saturate(1.4);backdrop-filter:blur(16px) saturate(1.4);background:#080a11b8;border-bottom:1px solid var(--border)}.topbar-inner{max-width:1200px;margin:0 auto;padding:14px 28px;display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:17px;letter-spacing:-.02em}.brand-badge{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:linear-gradient(135deg,#6366f1,#22d3ee);box-shadow:0 6px 20px -4px #6366f18c}.brand-sub{color:var(--text-faint);font-weight:500;font-size:13px;margin-left:2px}.topbar-spacer{flex:1}.topbar-link{color:var(--text-dim);font-size:14px;font-weight:600;padding:7px 14px;border-radius:9px;transition:all .2s}.topbar-link:hover{color:var(--text);background:var(--surface2)}.page{max-width:1200px;margin:0 auto;padding:40px 28px 110px}.glass{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.section-label{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--text-dim);margin:46px 0 18px}.section-label .dot{width:8px;height:8px;border-radius:3px;background:var(--pc, var(--accent));box-shadow:0 0 12px var(--pc, var(--accent))}.section-label .line{flex:1;height:1px;background:linear-gradient(90deg,var(--border2),transparent)}.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.02em;padding:4px 11px;border-radius:999px;border:1px solid var(--border2);color:var(--text-dim);background:var(--surface)}.chip.easy{color:var(--easy);border-color:#34d39959;background:#34d39914}.chip.medium{color:var(--medium);border-color:#fbbf2459;background:#fbbf2414}.chip.hard{color:var(--hard);border-color:#fb718559;background:#fb718514}.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:11px;font-size:14px;font-weight:600;color:var(--text);background:var(--surface2);border:1px solid var(--border2);transition:all .18s}.btn:hover{background:var(--surface3);transform:translateY(-1px)}.btn.primary{background:linear-gradient(135deg,var(--pc, #6366f1),color-mix(in oklab,var(--pc, #6366f1) 60%,#22d3ee));border-color:transparent;color:#0b0e17;font-weight:800}.inline-code{font-family:var(--mono);font-size:.86em;background:#7dd3fc1a;color:#a5e3ff;padding:2px 7px;border-radius:6px;border:1px solid rgba(125,211,252,.14);white-space:nowrap}.hero{padding:68px 0 30px;text-align:center;position:relative}.hero h1{font-size:clamp(38px,6vw,64px);font-weight:900;letter-spacing:-.035em;line-height:1.06}.hero h1 .grad{background:linear-gradient(100deg,#818cf8,#22d3ee 45%,#e879f9);-webkit-background-clip:text;background-clip:text;color:transparent}.hero p.sub{margin:20px auto 0;max-width:640px;color:var(--text-dim);font-size:18px}.hero-stats{display:flex;gap:14px;justify-content:center;margin-top:34px;flex-wrap:wrap}.stat-pill{display:flex;align-items:baseline;gap:8px;padding:10px 20px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}.stat-pill b{font-size:22px;font-weight:800}.stat-pill span{font-size:13px;color:var(--text-dim);font-weight:600}.search-wrap{max-width:560px;margin:38px auto 0;position:relative}.search-input{width:100%;padding:15px 22px 15px 50px;border-radius:16px;background:var(--surface2);border:1px solid var(--border2);color:var(--text);font-size:16px;outline:none;transition:all .2s}.search-input:focus{border-color:#7dd3fc80;box-shadow:0 0 0 4px #7dd3fc1f}.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--text-faint)}.search-results{margin:14px auto 0;max-width:560px;text-align:left;display:flex;flex-direction:column;gap:8px}.pattern-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:18px;margin-top:26px}.pattern-card{position:relative;display:block;padding:24px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);overflow:hidden;transition:transform .25s cubic-bezier(.2,.9,.3,1.2),border-color .25s,background .25s}.pattern-card:hover{transform:translateY(-5px);border-color:color-mix(in oklab,var(--pc) 45%,transparent);background:var(--surface2)}.pattern-card:before{content:"";position:absolute;inset:0 0 auto;height:3px;background:linear-gradient(90deg,var(--pc),transparent 75%);opacity:.85}.pattern-card .glow{position:absolute;width:220px;height:220px;border-radius:50%;right:-70px;top:-90px;background:radial-gradient(circle,var(--pc),transparent 70%);opacity:.1;transition:opacity .3s;pointer-events:none}.pattern-card:hover .glow{opacity:.22}.pattern-card-head{display:flex;align-items:center;gap:15px}.pattern-icon-box{width:52px;height:52px;flex:none;border-radius:14px;display:grid;place-items:center;background:color-mix(in oklab,var(--pc) 13%,transparent);border:1px solid color-mix(in oklab,var(--pc) 30%,transparent);color:var(--pc)}.pattern-card h3{font-size:18px;font-weight:800;letter-spacing:-.02em}.pattern-card .count{font-size:12.5px;color:var(--text-dim);font-weight:600;margin-top:2px}.pattern-card p.tag{margin-top:14px;font-size:14px;color:var(--text-dim);line-height:1.55}.pattern-card .arrow{position:absolute;right:20px;bottom:18px;color:var(--text-faint);transition:all .25s}.pattern-card:hover .arrow{color:var(--pc);transform:translate(4px)}.pattern-hero{display:flex;gap:26px;align-items:flex-start;padding:34px;position:relative;overflow:hidden}.pattern-hero .big-icon{width:84px;height:84px;flex:none;border-radius:22px;display:grid;place-items:center;background:color-mix(in oklab,var(--pc) 14%,transparent);border:1px solid color-mix(in oklab,var(--pc) 35%,transparent);color:var(--pc);box-shadow:0 10px 40px -10px color-mix(in oklab,var(--pc) 55%,transparent)}.pattern-hero h1{font-size:clamp(28px,4vw,42px);font-weight:900;letter-spacing:-.03em;line-height:1.1}.pattern-hero .tagline{color:var(--text-dim);font-size:17px;margin-top:10px;max-width:760px}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-faint);font-weight:600;margin-bottom:22px}.breadcrumb a:hover{color:var(--text)}.breadcrumb .sep{opacity:.5}.when-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}.when-item{display:flex;gap:12px;padding:16px 18px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);font-size:14.5px;color:var(--text-dim)}.when-item .tick{color:var(--pc);flex:none;margin-top:2px}.qlist{display:flex;flex-direction:column;gap:10px;margin-top:4px}.qrow{display:flex;align-items:center;gap:16px;padding:15px 20px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);transition:all .18s}.qrow:hover{background:var(--surface2);border-color:color-mix(in oklab,var(--pc) 40%,transparent);transform:translate(4px)}.qrow .idx{font-family:var(--mono);font-size:12.5px;color:var(--text-faint);width:26px;flex:none}.qrow .qtitle{font-weight:650;font-size:15.5px;flex:1;letter-spacing:-.01em}.qrow .karr{color:var(--text-faint);transition:transform .2s}.qrow:hover .karr{color:var(--pc);transform:translate(3px)}.qhead h1{font-size:clamp(26px,3.6vw,38px);font-weight:900;letter-spacing:-.03em;line-height:1.15}.qhead-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:16px}.prose{color:var(--text-dim);font-size:15.5px}.prose p+p{margin-top:12px}.prose b,.prose strong{color:var(--text)}.summary-callout{padding:20px 24px;border-radius:var(--radius);background:color-mix(in oklab,var(--pc) 7%,transparent);border:1px solid color-mix(in oklab,var(--pc) 22%,transparent);font-size:16px;color:var(--text);line-height:1.6}.example-card{padding:16px 20px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border);font-family:var(--mono);font-size:13.5px}.example-card .lbl{font-family:var(--sans);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint);margin-bottom:4px}.example-card .expl{font-family:var(--sans);color:var(--text-dim);font-size:13.5px;margin-top:8px}.examples-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}.steps{display:flex;flex-direction:column;gap:12px;counter-reset:step}.step-item{display:flex;gap:15px;padding:16px 20px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--border)}.step-item .n{counter-increment:step;flex:none;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font-size:13px;font-weight:800;font-family:var(--mono);background:color-mix(in oklab,var(--pc) 15%,transparent);color:var(--pc);border:1px solid color-mix(in oklab,var(--pc) 30%,transparent)}.step-item .n:before{content:counter(step)}.step-item .txt{color:var(--text-dim);font-size:15px;padding-top:2px}.pitfall-item{display:flex;gap:12px;padding:14px 18px;border-radius:var(--radius-sm);background:#fb71850d;border:1px solid rgba(251,113,133,.16);color:var(--text-dim);font-size:14.5px}.pitfall-item .warn{color:var(--hard);flex:none;margin-top:1px}.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:60px}.pn-card{padding:18px 22px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);transition:all .2s}.pn-card:hover{background:var(--surface2);border-color:color-mix(in oklab,var(--pc) 40%,transparent)}.pn-card .dir{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:var(--text-faint)}.pn-card .name{font-weight:700;margin-top:5px;font-size:15px}.pn-card.next{text-align:right}.cx-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.cx-card{padding:20px 22px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);position:relative;overflow:hidden}.cx-card .cx-label{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:var(--text-faint)}.cx-card .cx-value{font-family:var(--mono);font-size:26px;font-weight:700;margin-top:6px;color:var(--text)}.cx-card .cx-note{font-size:13.5px;color:var(--text-dim);margin-top:8px}.cx-meter{margin-top:14px;height:7px;border-radius:99px;background:var(--surface3);overflow:hidden}.cx-meter .fill{height:100%;border-radius:99px;transition:width .8s cubic-bezier(.2,.8,.2,1)}.codeblock{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);background:#0a0d16}.codeblock-head{display:flex;align-items:center;gap:10px;padding:11px 18px;background:#ffffff08;border-bottom:1px solid var(--border)}.codeblock-head .dots{display:flex;gap:6px}.codeblock-head .dots i{width:11px;height:11px;border-radius:50%;opacity:.85}.codeblock-head .fname{font-family:var(--mono);font-size:12.5px;color:var(--text-dim);margin-left:6px}.codeblock-head .copy{margin-left:auto;font-size:12px;font-weight:700;color:var(--text-dim);background:none;border:1px solid var(--border2);padding:4px 11px;border-radius:7px;transition:all .15s}.codeblock-head .copy:hover{color:var(--text);background:var(--surface2)}.codeblock pre{overflow-x:auto;padding:18px 0;font-size:13.5px;line-height:1.7}.codeline{display:flex;padding:0 18px}.codeline:hover{background:#ffffff06}.codeline .ln{width:34px;flex:none;text-align:right;padding-right:18px;color:#ffffff29;-webkit-user-select:none;user-select:none;font-size:12px;line-height:inherit}.codeline .lc{white-space:pre}.tk-kw{color:#c792ea}.tk-str{color:#a5d6a7}.tk-num{color:#f78c6c}.tk-com{color:#546178;font-style:italic}.tk-fn{color:#82aaff}.tk-bi{color:#7fdbca}.tk-op{color:#89ddff}.tk-self{color:#ff9e80}.tk-dec{color:#ffcb6b}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.tab-btn{padding:8px 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13px}.progress-wrap{flex:1;display:flex;align-items:center;gap:12px}.progress-bar{flex:1;height:7px;border-radius:99px;background:var(--surface3);cursor:pointer;position:relative}.progress-bar .pfill{position:absolute;inset:0 auto 0 0;border-radius:99px;background:var(--pc, var(--accent));transition:width .25s ease}.frame-count{font-family:var(--mono);font-size:12px;color:var(--text-dim);white-space:nowrap}.viz-svg text{font-family:var(--mono)}@keyframes iconPulse{0%,to{opacity:.35}50%{opacity:1}}@keyframes iconSlide{0%{transform:translate(0)}50%{transform:translate(14px)}to{transform:translate(0)}}@keyframes iconSlideBack{0%{transform:translate(0)}50%{transform:translate(-14px)}to{transform:translate(0)}}@keyframes iconOrbitFast{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes iconGrow{0%,to{transform:scaleY(.4)}50%{transform:scaleY(1)}}@keyframes iconBlink{0%,to{opacity:.15}50%{opacity:1}}@keyframes iconDash{to{stroke-dashoffset:-24}}.ic-pulse{animation:iconPulse 2.2s 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