:root{--bg: #09090b;--surface: #0f0f12;--surface-2: #16161a;--surface-3: #1f1f24;--border: #232329;--border-strong: #34343c;--text: #ededef;--text-muted: #9b9ba6;--ember: #ff6a2b;--ember-hover: #ff8550;--on-ember: #09090b;--flame-from: #ff6b2c;--flame-to: #ffb020;--success: #22c55e;--success-bg: rgba(34, 197, 94, .12);--danger: #ef4444;--danger-text: #f87171;--danger-bg: rgba(239, 68, 68, .12);--warning: #ffb020;--focus: #ffb020;--code-bg: #0b0b0e;--code-kw: #ff8f66;--code-str: #9ee6a8;--code-num: #f5c97a;--code-com: #7d7d8a;--code-fn: #8fb8ff;--glow: 0 0 0 1px rgba(255, 106, 43, .22), 0 12px 40px -16px rgba(255, 106, 43, .35);--shadow-1: 0 1px 0 rgba(255, 255, 255, .03) inset;--shadow-2: 0 8px 24px -12px rgba(0, 0, 0, .6);--shadow-3: 0 24px 64px -24px rgba(0, 0, 0, .8);color-scheme:dark;--font-sans: "Geist", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display: var(--font-sans);--font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;--s-1: 4px;--s-2: 8px;--s-3: 12px;--s-4: 16px;--s-5: 24px;--s-6: 32px;--s-7: 48px;--s-8: 64px;--r-sm: 6px;--r-md: 10px;--r-lg: 14px;--r-pill: 999px;--dur-fast: .15s;--dur-base: .22s;--dur-slow: .4s;--ease-out: cubic-bezier(.2, .8, .2, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--z-sticky: 10;--z-drawer: 40;--z-toast: 100}@media (prefers-color-scheme: light){:root:not([data-theme=dark]){--bg: #fafafa;--surface: #ffffff;--surface-2: #f4f4f5;--surface-3: #e9e9ec;--border: #e4e4e7;--border-strong: #d0d0d6;--text: #09090b;--text-muted: #52525b;--ember: #c2410c;--ember-hover: #9a3412;--on-ember: #ffffff;--success: #15803d;--success-bg: rgba(21, 128, 61, .1);--danger: #b91c1c;--danger-text: #b91c1c;--danger-bg: rgba(185, 28, 28, .08);--warning: #b45309;--focus: #c2410c;--code-bg: #fbfbfc;--code-kw: #c2410c;--code-str: #15803d;--code-num: #a16207;--code-com: #536176;--code-fn: #1d4ed8;--glow: 0 0 0 1px rgba(232, 85, 26, .2), 0 8px 24px -8px rgba(232, 85, 26, .25);--shadow-1: 0 1px 2px rgba(9, 9, 11, .04);--shadow-2: 0 8px 24px -12px rgba(9, 9, 11, .12);--shadow-3: 0 24px 64px -24px rgba(9, 9, 11, .2);color-scheme:light}}:root[data-theme=light]{--bg: #fafafa;--surface: #ffffff;--surface-2: #f4f4f5;--surface-3: #e9e9ec;--border: #e4e4e7;--border-strong: #d0d0d6;--text: #09090b;--text-muted: #52525b;--ember: #c2410c;--ember-hover: #9a3412;--on-ember: #ffffff;--success: #15803d;--success-bg: rgba(21, 128, 61, .1);--danger: #b91c1c;--danger-text: #b91c1c;--danger-bg: rgba(185, 28, 28, .08);--warning: #b45309;--focus: #c2410c;--code-bg: #fbfbfc;--code-kw: #c2410c;--code-str: #15803d;--code-num: #a16207;--code-com: #536176;--code-fn: #1d4ed8;--glow: 0 0 0 1px rgba(232, 85, 26, .2), 0 8px 24px -8px rgba(232, 85, 26, .25);--shadow-1: 0 1px 2px rgba(9, 9, 11, .04);--shadow-2: 0 8px 24px -12px rgba(9, 9, 11, .12);--shadow-3: 0 24px 64px -24px rgba(9, 9, 11, .2);color-scheme:light}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.2;margin:0 0 var(--s-3);font-weight:600;letter-spacing:-.025em;text-wrap:balance}h1{font-size:clamp(1.75rem,1.3rem + 2vw,2.5rem)}h2{font-size:1.5rem}h3{font-size:1.125rem}p{margin:0 0 var(--s-4)}a{color:var(--ember);text-underline-offset:3px}a:hover{color:var(--ember-hover)}code,pre,kbd{font-family:var(--font-mono);font-variant-ligatures:none;font-feature-settings:"liga" 0,"calt" 0;font-size:.9em}:not(pre)>code{background:var(--surface-2);border:1px solid var(--border);padding:.05em .35em;border-radius:6px;overflow-wrap:anywhere}kbd{border:1px solid var(--border-strong);border-bottom-width:2px;border-radius:6px;padding:0 6px;font-size:.8em;color:var(--text-muted)}img,svg{display:block;max-width:100%}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed}:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}.skip-link{position:absolute;left:var(--s-4);top:-100px;z-index:var(--z-toast);background:var(--ember);color:var(--on-ember);padding:var(--s-2) var(--s-4);border-radius:var(--r-sm);font-weight:600}.skip-link:focus{top:var(--s-4)}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-variant-ligatures:none;font-feature-settings:"liga" 0,"calt" 0}.muted{color:var(--text-muted)}::selection{background:color-mix(in srgb,var(--ember) 35%,transparent)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s-2);min-height:44px;padding:0 var(--s-5);border-radius:var(--r-sm);border:1px solid var(--border-strong);background:var(--surface-2);color:var(--text);font-weight:500;font-size:.9375rem;text-decoration:none;transition:background var(--dur-fast) var(--ease-out),border-color var(--dur-fast),transform var(--dur-fast);white-space:nowrap}.btn:hover{background:var(--surface-3);color:var(--text)}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;transform:none}.btn-primary{background:var(--text);border-color:var(--text);color:var(--bg)}.btn-primary:hover{background:color-mix(in srgb,var(--text) 86%,var(--bg));border-color:transparent;color:var(--bg)}.btn-ghost{background:transparent;border-color:transparent}.btn-ghost:hover{background:var(--surface-2)}.btn-danger{background:transparent;border-color:var(--danger);color:var(--danger-text)}.btn-danger:hover{background:var(--danger-bg);color:var(--danger-text)}.btn-sm{min-height:36px;padding:0 var(--s-3);font-size:.875rem}.btn-lg{min-height:48px;padding:0 var(--s-5);font-size:1rem}.btn-block{width:100%}.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid transparent;background:transparent;color:var(--text-muted)}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.spinner{width:16px;height:16px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:var(--s-5);box-shadow:var(--shadow-1)}.card-title{display:flex;align-items:center;gap:var(--s-2);font-size:1rem;margin-bottom:var(--s-3)}.card-link{display:block;color:inherit;text-decoration:none;transition:border-color var(--dur-fast),transform var(--dur-base) var(--ease-out)}.card-link:hover{border-color:var(--border-strong);background:var(--surface-2);color:inherit}.eyebrow{display:inline-flex;align-items:center;gap:var(--s-2);font-family:var(--font-mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ember);margin-bottom:var(--s-2)}.field{display:grid;gap:6px;margin-bottom:var(--s-4)}.field label{font-weight:600;font-size:.9375rem}.field .hint{font-size:.875rem;color:var(--text-muted)}.input-wrap{position:relative}.input{width:100%;min-height:48px;padding:0 var(--s-4);background:var(--surface-2);border:1px solid var(--border-strong);border-radius:var(--r-sm);transition:border-color var(--dur-fast)}.input:hover{border-color:var(--text-muted)}.input:focus-visible{outline:2px solid var(--focus);outline-offset:1px;border-color:transparent}.input[aria-invalid=true]{border-color:var(--danger)}.input-wrap .input{padding-right:52px}.input-wrap .icon-btn{position:absolute;right:2px;top:2px}.field-error{display:flex;gap:6px;align-items:flex-start;color:var(--danger-text);font-size:.875rem}select.input{padding-right:var(--s-6)}.alert{display:flex;gap:var(--s-3);align-items:flex-start;padding:var(--s-3) var(--s-4);border-radius:var(--r-sm);border:1px solid var(--danger);background:var(--danger-bg);color:var(--text);margin-bottom:var(--s-4)}.alert svg{color:var(--danger-text);flex-shrink:0;margin-top:3px}.shell{display:grid;grid-template-columns:1fr;min-height:100dvh}.sidebar{display:none}.topbar{position:sticky;top:0;z-index:var(--z-sticky);display:flex;align-items:center;justify-content:space-between;gap:var(--s-3);padding:var(--s-2) var(--s-4);background:color-mix(in srgb,var(--bg) 85%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.main{padding:var(--s-5) var(--s-4) var(--s-8);min-width:0;outline:none}.container{max-width:1120px;margin:0 auto}.container-narrow{max-width:760px;margin:0 auto}.logo{display:inline-flex;align-items:center;gap:var(--s-2);font-weight:700;font-size:1.125rem;color:var(--text);text-decoration:none}.logo:hover{color:var(--text)}.logo-mark{width:32px;height:32px}.logo small{font-family:var(--font-mono);font-weight:500;font-size:.7rem;color:var(--text-muted);letter-spacing:.08em}.nav{display:grid;gap:4px}.nav a{display:flex;align-items:center;gap:var(--s-3);min-height:44px;padding:0 var(--s-3);border-radius:var(--r-sm);color:var(--text-muted);text-decoration:none;font-weight:500;position:relative}.nav a:hover,.nav a.active{background:var(--surface-2);color:var(--text)}.nav a.active:before{content:"";position:absolute;left:-12px;top:10px;bottom:10px;width:3px;border-radius:3px;background:linear-gradient(var(--flame-from),var(--flame-to))}.nav .badge{margin-left:auto}.badge{min-width:22px;padding:0 7px;border-radius:var(--r-pill);background:var(--ember);color:var(--on-ember);font-family:var(--font-mono);font-size:.75rem;font-weight:700;line-height:22px;text-align:center}.drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:var(--z-drawer);animation:fade-in var(--dur-base) var(--ease-out)}.drawer{position:fixed;inset:0 auto 0 0;width:min(300px,86vw);background:var(--surface);border-right:1px solid var(--border);z-index:calc(var(--z-drawer) + 1);padding:var(--s-4);display:flex;flex-direction:column;gap:var(--s-5);animation:slide-in var(--dur-base) var(--ease-out)}@keyframes fade-in{0%{opacity:0}}@keyframes slide-in{0%{transform:translate(-100%)}}.sidebar-stats{display:grid;gap:var(--s-3);padding:var(--s-4);border-radius:var(--r-md);background:var(--surface-2);border:1px solid var(--border)}.sidebar-foot{margin-top:auto;display:grid;gap:var(--s-2)}@media (min-width: 1024px){.shell{grid-template-columns:264px 1fr}.topbar{display:none}.sidebar{display:flex;flex-direction:column;gap:var(--s-5);position:sticky;top:0;height:100dvh;padding:var(--s-5) var(--s-4) var(--s-4) var(--s-5);border-right:1px solid var(--border);background:var(--surface);overflow-y:auto}.main{padding:var(--s-6) var(--s-6) var(--s-8)}}.streak{display:inline-flex;align-items:center;gap:var(--s-2);font-family:var(--font-mono);font-weight:700}.streak-flame{width:28px;height:28px}.streak-flame.lit .flame-outer{animation:flicker 1.6s ease-in-out infinite;transform-origin:50% 90%}.streak-flame.lit .flame-inner{animation:flicker 1.1s ease-in-out infinite reverse;transform-origin:50% 90%}.streak-flame.out{filter:grayscale(1);opacity:.45}@keyframes flicker{0%,to{transform:scale(1) rotate(0)}33%{transform:scale(1.04,.97) rotate(-2deg)}66%{transform:scale(.97,1.04) rotate(2deg)}}.xpbar{display:grid;gap:6px}.xpbar-head{display:flex;justify-content:space-between;align-items:baseline;font-size:.8125rem;color:var(--text-muted);gap:var(--s-2)}.xpbar-head strong{color:var(--text);font-family:var(--font-mono)}.xpbar-head{flex-wrap:wrap}.xpbar-head>*{white-space:nowrap}.xpbar-track{height:10px;border-radius:var(--r-pill);background:var(--surface-3);overflow:hidden}.xpbar-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--flame-from),var(--flame-to));transform-origin:left;transition:transform var(--dur-slow) var(--ease-out)}.xp-burst{position:fixed;right:var(--s-5);bottom:var(--s-6);z-index:var(--z-toast);display:inline-flex;align-items:center;gap:var(--s-2);padding:var(--s-2) var(--s-4);border-radius:var(--r-pill);background:linear-gradient(90deg,var(--flame-from),var(--flame-to));color:#1a0f05;font-family:var(--font-mono);font-weight:800;box-shadow:var(--glow);animation:burst 1.6s var(--ease-spring) forwards;pointer-events:none}@keyframes burst{0%{opacity:0;transform:translateY(20px) scale(.6)}15%{opacity:1;transform:translateY(0) scale(1.08)}25%{transform:scale(1)}80%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-24px)}}.toasts{position:fixed;bottom:var(--s-4);left:50%;transform:translate(-50%);z-index:var(--z-toast);display:grid;gap:var(--s-2);width:min(440px,calc(100vw - 32px))}.toast{display:flex;align-items:center;gap:var(--s-3);padding:var(--s-3) var(--s-4);border-radius:var(--r-md);background:var(--surface-3);border:1px solid var(--border-strong);box-shadow:var(--shadow-3);animation:toast-in var(--dur-base) var(--ease-out)}.toast-error{border-color:var(--danger)}.toast-error>svg{color:var(--danger-text)}.toast-success>svg{color:var(--success)}.toast .grow{flex:1}@keyframes toast-in{0%{opacity:0;transform:translateY(12px)}}.skeleton{background:linear-gradient(90deg,var(--surface-2) 25%,var(--surface-3) 50%,var(--surface-2) 75%);background-size:200% 100%;animation:shimmer 1.4s linear infinite;border-radius:var(--r-sm)}@keyframes shimmer{to{background-position:-200% 0}}.pill{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:var(--r-pill);font-size:.75rem;font-weight:600;border:1px solid var(--border-strong);color:var(--text-muted);white-space:nowrap}.pill-read{color:var(--text);border-color:var(--text-muted)}.pill-practiced{color:var(--warning);border-color:var(--warning)}.pill-mastered{color:var(--success);border-color:var(--success);background:var(--success-bg)}.landing{overflow-x:clip;position:relative;isolation:isolate}.landing:before{content:"";position:absolute;inset:0 0 auto 0;height:900px;background-image:radial-gradient(color-mix(in srgb,var(--text) 14%,transparent) 1px,transparent 1px);background-size:22px 22px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,#000 30%,transparent 75%);pointer-events:none;z-index:-1}.landing-nav{position:sticky;top:0;z-index:var(--z-sticky);display:flex;justify-content:space-between;align-items:center;gap:var(--s-3);padding:var(--s-3) max(var(--s-4),calc((100% - 1148px)/2));background:color-mix(in srgb,var(--bg) 75%,transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid color-mix(in srgb,var(--border) 70%,transparent)}.landing-nav .actions{display:flex;gap:var(--s-2)}.hero{max-width:1180px;margin:0 auto;padding:var(--s-8) var(--s-4) var(--s-7);display:grid;gap:var(--s-7);align-items:center}.hero h1{font-size:clamp(2.25rem,1.2rem + 3.2vw,3.25rem);letter-spacing:-.04em;line-height:1.05;font-weight:600;margin-bottom:var(--s-4)}.hero-dim{background:linear-gradient(180deg,var(--text) 0%,var(--text-muted) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}.hero .lede{font-size:1.125rem;color:var(--text-muted);max-width:52ch}.hero-cta{display:flex;flex-wrap:wrap;gap:var(--s-3);margin-top:var(--s-5)}.badge-line{display:inline-flex;align-items:center;gap:var(--s-2);padding:4px 12px 4px 10px;margin-bottom:var(--s-5);border:1px solid var(--border-strong);border-radius:var(--r-pill);background:var(--surface);font-size:.75rem;color:var(--text-muted)}.pulse{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 0 0 var(--success);animation:pulse 2s ease-out infinite}@keyframes pulse{70%{box-shadow:0 0 0 6px transparent}to{box-shadow:0 0 0 0 transparent}}@media (min-width: 960px){.hero{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}}.window{border:1px solid var(--border-strong);border-radius:var(--r-lg);background:var(--code-bg);overflow:hidden;box-shadow:var(--shadow-3);min-width:0}.hero-demo{box-shadow:var(--shadow-3),var(--glow)}.window-bar{display:flex;align-items:center;gap:var(--s-3);padding:10px var(--s-4);border-bottom:1px solid var(--border);background:var(--surface)}.dots{display:inline-flex;gap:6px}.dots i{width:10px;height:10px;border-radius:50%;background:var(--border-strong)}.window-title{font-size:.8125rem;color:var(--text-muted)}.window-tag{margin-left:auto;font-size:.6875rem;padding:1px 8px;border-radius:var(--r-pill);border:1px solid color-mix(in srgb,var(--ember) 45%,transparent);color:var(--ember)}.window-code.code{border:0;border-radius:0;padding:var(--s-4) var(--s-4) var(--s-4) var(--s-3);background:transparent}.window-code .ln{display:inline-block;width:2ch;margin-right:var(--s-4);text-align:right;color:var(--code-com);opacity:.6;-webkit-user-select:none;user-select:none}.window-toggle.toggle{margin:0 var(--s-4) var(--s-4);background:var(--surface)}.window-console{border-top:1px solid var(--border);font-family:var(--font-mono);font-size:.8125rem;min-height:96px}.window-console .output-head{background:transparent;text-transform:none;letter-spacing:0}.window-console ol{list-style:none;margin:0;padding:var(--s-2) 0 var(--s-3)}.window-console li{padding:2px var(--s-4);white-space:pre-wrap;overflow-wrap:anywhere}.window-console li.error{color:var(--danger-text);background:var(--danger-bg)}.section{max-width:1180px;margin:0 auto;padding:var(--s-8) var(--s-4) 0}.section h2{font-size:clamp(1.5rem,1.2rem + 1.2vw,2.125rem);letter-spacing:-.03em;font-weight:600;max-width:26ch}.kicker{font-size:.8125rem;color:var(--ember);margin-bottom:var(--s-2)}.angle-grid,.bento{display:grid;gap:1px;margin-top:var(--s-6);background:var(--border);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;list-style:none;padding:0}.angle-grid{grid-template-columns:1fr}@media (min-width: 640px){.angle-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 960px){.angle-grid{grid-template-columns:repeat(4,1fr)}}.bento{grid-template-columns:1fr}@media (min-width: 640px){.bento{grid-template-columns:repeat(2,1fr)}}@media (min-width: 960px){.bento{grid-template-columns:repeat(3,1fr)}}.angle-grid 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