:root{--ink:#0a0d14;--ink2:#0e121c;--panel:#141a26;--panel2:#19202e;--line:#26303f;--line2:#313d50;--text:#e8ebf2;--muted:#9aa4ba;--faint:#6b7589;--accent:#7c8cff;--accent2:#3ad6c5;--accent-deep:#5566e6;--f-foundational:#34d399;--f-intermediate:#38bdf8;--f-advanced:#fbbf24;--f-expert:#fb7185;--radius:14px;--radius-sm:9px;--maxw:1180px;--shadow:0 18px 50px -22px #000000bf;--font-display:"Space Grotesk", system-ui, sans-serif;--font-body:"IBM Plex Sans", system-ui, sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, monospace}html{scroll-behavior:smooth;background:var(--ink)}body{background:var(--ink);color:var(--text);font-family:var(--font-body);-webkit-font-smoothing:antialiased;margin:0}@property --ln-glowA{syntax:"<color>";inherits:false;initial-value:#7c8cff29}@property --ln-glowB{syntax:"<color>";inherits:false;initial-value:#3ad6c51a}.ln{--ln-gap:clamp(1.2rem, 3vw, 2.4rem);color:var(--text);font-family:var(--font-body);background:radial-gradient(1100px 700px at 78% 8%, var(--ln-glowA), transparent 60%), radial-gradient(900px 620px at 8% 92%, var(--ln-glowB), transparent 58%);line-height:1.65}.ln *,.ln :before,.ln :after{box-sizing:border-box}.ln-wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,4vw,2.4rem)}.ln-shell{max-width:760px;margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}.ln-skip{z-index:50;background:var(--accent);color:var(--ink);border-radius:var(--radius-sm);font-family:var(--font-mono);padding:.6rem 1rem;font-size:.8rem;position:absolute;top:0;left:-999px}.ln-skip:focus{top:.6rem;left:.6rem}.ln-topbar{z-index:30;backdrop-filter:blur(10px);background:color-mix(in srgb, var(--ink) 82%, transparent);border-bottom:1px solid var(--line);position:sticky;top:0}.ln-topbar-in{align-items:center;gap:1rem;min-height:56px;display:flex}.ln-brand{font-family:var(--font-display);letter-spacing:-.02em;color:var(--text);font-weight:700;text-decoration:none}.ln-brand span{color:var(--accent2)}.ln-topnav{flex-wrap:wrap;gap:.3rem;margin-left:auto;display:flex}.ln-topnav a{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);border-radius:var(--radius-sm);padding:.4rem .6rem;font-size:.68rem;text-decoration:none;transition:color .2s}.ln-topnav a:hover,.ln-topnav a:focus-visible{color:var(--text);background:var(--panel)}.ln-topnav a[aria-current=page]{color:var(--accent2)}.ln-progress{z-index:40;transform-origin:0;background:linear-gradient(90deg, var(--accent), var(--accent2));height:2px;box-shadow:0 0 10px -1px var(--accent2);position:fixed;top:0;left:0;right:0;transform:scaleX(0)}.ln-static .ln-progress{display:none}.ln-eyebrow{font-family:var(--font-mono);letter-spacing:.22em;text-transform:uppercase;color:var(--accent2);align-items:center;gap:.5rem;font-size:.7rem;display:inline-flex}.ln-eyebrow:before{content:"";background:var(--accent2);width:7px;height:7px;box-shadow:0 0 10px var(--accent2);border-radius:50%}.ln-grad{background:linear-gradient(110deg, var(--accent), var(--accent2));color:#0000;-webkit-background-clip:text;background-clip:text}.ln-muted{color:var(--muted)}.ln h1,.ln h2,.ln h3{font-family:var(--font-display);letter-spacing:-.02em;font-weight:700;line-height:1.08}.ln-hero{align-items:center;min-height:92vh;display:flex;position:relative;overflow:clip}.ln-hero-art{z-index:0;position:absolute;inset:0;overflow:hidden}.ln-aurora{filter:blur(58px);opacity:.5;contain:paint;position:absolute;inset:-20%}.ln-aurora span{border-radius:50%;display:block;position:absolute}.ln-aurora .b1{background:radial-gradient(circle, var(--accent), transparent 68%);width:46%;height:46%;animation:22s ease-in-out infinite ln-float1;top:12%;left:8%}.ln-aurora .b2{background:radial-gradient(circle, var(--accent2), transparent 68%);width:40%;height:40%;animation:26s ease-in-out infinite ln-float2;top:30%;right:6%}.ln-aurora .b3{background:radial-gradient(circle, var(--accent-deep), transparent 70%);width:38%;height:38%;animation:30s ease-in-out infinite ln-float3;bottom:6%;left:34%}.ln-grid{opacity:.5;background-image:radial-gradient(circle at center, color-mix(in srgb, var(--accent2) 55%, transparent) 1px, transparent 1.4px);background-size:34px 34px;animation:40s linear infinite ln-griddrift;position:absolute;inset:0;-webkit-mask-image:radial-gradient(70% 70% at 50% 45%,#000 30%,#0000 78%);mask-image:radial-gradient(70% 70% at 50% 45%,#000 30%,#0000 78%)}@keyframes ln-float1{0%,to{transform:translate(0,0)scale(1)}50%{transform:translate(6%,4%)scale(1.12)}}@keyframes ln-float2{0%,to{transform:translate(0,0)scale(1)}50%{transform:translate(-5%,6%)scale(1.08)}}@keyframes ln-float3{0%,to{transform:translate(0,0)scale(1)}50%{transform:translate(4%,-5%)scale(1.15)}}@keyframes ln-griddrift{to{transform:translate(-34px,-34px)}}.ln-hero-in{z-index:1;position:relative}.ln-hero h1{margin:1rem 0 1.2rem;font-size:clamp(2.6rem,8vw,5.6rem)}.ln-hero-sub{color:var(--muted);max-width:46ch;font-size:clamp(1.05rem,2.4vw,1.35rem)}.ln-hero-sub b{color:var(--text);font-weight:600}.ln-hero-stats{flex-wrap:wrap;gap:1.6rem;margin-top:1.8rem;display:flex}.ln-stat{font-family:var(--font-mono);color:var(--muted);letter-spacing:.04em;font-size:.8rem}.ln-stat b{font-family:var(--font-display);color:var(--accent2);letter-spacing:-.01em;font-size:1.7rem;font-weight:700;display:block}.ln-jump{z-index:20;backdrop-filter:blur(10px);background:color-mix(in srgb, var(--ink) 80%, transparent);border-bottom:1px solid var(--line);position:sticky;top:56px}.ln-jump-row{scrollbar-width:thin;gap:.3rem;padding:.6rem 0;display:flex;overflow-x:auto}.ln-jump-row a{font-family:var(--font-mono);letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);white-space:nowrap;border-radius:999px;flex:none;padding:.35rem .7rem;font-size:.68rem;text-decoration:none;transition:color .2s,border-color .2s}.ln-jump-row a:hover,.ln-jump-row a:focus-visible{color:var(--accent2);border-color:var(--accent2)}.ln-jump-row a[aria-current=true]{color:var(--accent2);border-color:var(--accent2);background:color-mix(in srgb, var(--accent2) 12%, transparent)}.ln-chapter{border-top:1px solid color-mix(in srgb, var(--line) 60%, transparent);padding:clamp(3rem,9vw,6rem) 0;scroll-margin-top:110px}.ln-chapter:first-of-type{border-top:none}.ln-chapter-h{margin:.6rem 0 .4rem;font-size:clamp(1.8rem,5vw,3rem)}.ln-cue{font-family:var(--font-mono);letter-spacing:.22em;text-transform:uppercase;color:var(--faint);flex-direction:column;align-items:center;gap:.6rem;margin-top:2.4rem;font-size:.62rem;display:inline-flex}.ln-cue-line{background:linear-gradient(180deg, var(--accent2), transparent);width:1px;height:42px}.ln-reveal{opacity:1;transition:opacity .6s,transform .6s cubic-bezier(.22,.61,.36,1);transform:none}.ln-animate .ln-reveal:not(.is-in){opacity:0;will-change:opacity, transform;transform:translateY(22px)}.ln-reveal.is-in{opacity:1;will-change:auto;transform:none}.ln-static .ln-reveal{transition:none;opacity:1!important;transform:none!important}.ln-section{margin-block:clamp(2.4rem,7vw,5rem)}.ln-section h2{margin-bottom:.9rem;font-size:clamp(1.5rem,4vw,2.2rem)}.ln-lede{color:var(--text);border-left:3px solid var(--accent2);margin:1.6rem 0 2.4rem;padding-left:1.1rem;font-size:clamp(1.15rem,2.6vw,1.4rem)}.ln-prose p{color:var(--muted);margin:.6rem 0}.ln-prose b{color:var(--text)}.ln-analogy{border:1px solid var(--line);background:linear-gradient(160deg, var(--panel), var(--panel2));border-radius:var(--radius);box-shadow:var(--shadow);padding:1.3rem 1.5rem}.ln-sec-h{margin:1rem 0 .5rem;font-size:1.17rem}.ln-analogy .ln-sec-h{color:var(--accent);margin:0 0 .4rem;font-size:1.05rem}.ln-callout{border:1px solid color-mix(in srgb, var(--accent2) 34%, var(--line));background:color-mix(in srgb, var(--accent2) 7%, var(--panel));border-radius:var(--radius);padding:1.2rem 1.4rem}.ln-callout .ln-sec-h,.ln-callout h3{color:var(--accent2);text-transform:uppercase;letter-spacing:.06em;font-size:.96rem;font-family:var(--font-mono);margin:0 0 .35rem}.ln-keypoints{gap:.7rem;padding:0;list-style:none;display:grid}.ln-keypoints a{color:var(--accent2)}.ln-keypoints a:focus-visible{outline:2px solid var(--accent2);outline-offset:3px}.ln-keypoints li{color:var(--muted);padding-left:1.7rem;position:relative}.ln-keypoints li:before{content:"→";color:var(--accent2);font-weight:700;position:absolute;left:0}.ln-steps{counter-reset:step;gap:.9rem;padding:0;list-style:none;display:grid}.ln-steps li{color:var(--muted);padding-left:2.6rem;position:relative}.ln-steps li:before{counter-increment:step;content:counter(step);background:color-mix(in srgb, var(--accent) 18%, transparent);width:1.8rem;height:1.8rem;color:var(--accent);font-family:var(--font-mono);border:1px solid color-mix(in srgb, var(--accent) 40%, transparent);border-radius:50%;place-items:center;font-size:.85rem;display:grid;position:absolute;top:-.1rem;left:0}.ln-table-wrap{border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}.ln-table{border-collapse:collapse;width:100%;min-width:420px}.ln-table th,.ln-table td{text-align:left;border-bottom:1px solid var(--line);padding:.8rem 1rem;font-size:.95rem}.ln-table th{font-family:var(--font-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--accent2);font-size:.72rem}.ln-table td:first-child{color:var(--muted);font-family:var(--font-mono);font-size:.82rem}.ln-table tr:last-child td{border-bottom:none}.ln-figure{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(160deg, var(--panel), var(--panel2));box-shadow:var(--shadow);margin:2rem 0;overflow:hidden}.ln-figure-stage{place-items:center;width:100%;min-height:180px;padding:clamp(1.4rem,4vw,2.6rem) 1.2rem;display:grid;position:relative}.ln-figure figcaption{border-top:1px solid var(--line);color:var(--faint);font-family:var(--font-mono);letter-spacing:.04em;padding:.7rem 1.1rem;font-size:.72rem}.ln-video{min-width:0;margin:2rem 0}.ln-video h2,.ln-video h3{margin:0 0 .75rem;font-size:clamp(1.25rem,3vw,1.6rem)}.ln-video video{aspect-ratio:16/9;object-fit:contain;background:var(--ink2);border:1px solid var(--line);border-radius:var(--radius);width:100%;height:auto;display:block}.ln-video video:focus-visible,.ln-video summary:focus-visible,.ln-video a:focus-visible{outline:2px solid var(--accent2);outline-offset:4px}.ln-video-caption{color:var(--muted);margin:.7rem 0;font-size:.9rem;line-height:1.6}.ln-video details{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel);margin-top:.8rem;padding:.7rem 1rem}.ln-video summary{cursor:pointer;color:var(--accent2);align-content:center;min-height:2.25rem;font-size:.9rem}.ln-video details p{color:var(--muted);margin:.65rem 0;font-size:1rem;line-height:1.65}.ln-dia{flex-direction:column;align-items:center;gap:1rem;width:100%;display:flex}.ln-dia-row,.ln-dia-flow{flex-wrap:wrap;justify-content:center;align-items:center;gap:.6rem;display:flex}.ln-dia-col{flex-direction:column;gap:.5rem;display:flex}.ln-dia-note{font-family:var(--font-mono);color:var(--faint);letter-spacing:.03em;text-align:center;margin:0;font-size:.8rem}.ln-dia-note.accent{color:var(--accent2)}.ln-pill{font-family:var(--font-mono);color:var(--text);background:var(--panel2);border:1.5px solid var(--line2);white-space:nowrap;border-radius:10px;padding:.55rem .9rem;font-size:.95rem}.ln-pill.big{font-family:var(--font-display);padding:.8rem 1.3rem;font-size:1.05rem;font-weight:700}.ln-pill.hot{border-color:var(--accent2);color:var(--accent2);background:color-mix(in srgb, var(--accent2) 12%, var(--panel2))}.ln-pill.danger{border-color:var(--f-expert);color:var(--f-expert);background:color-mix(in srgb, var(--f-expert) 12%, var(--panel2))}.ln-pill.match{border-color:var(--accent2);color:var(--accent2);background:color-mix(in srgb, var(--accent2) 14%, var(--panel2))}.ln-pill.dim{color:var(--faint)}.ln-arrow{color:var(--accent);font-size:1.6rem;font-weight:700;line-height:1}.ln-dia-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.7rem;width:100%;display:grid}.ln-dia-grid .ln-pill{text-align:center;white-space:normal}.ln-dia-split{grid-template-columns:1fr 1fr;gap:1rem;width:100%;max-width:560px;display:grid}.ln-dia-side{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel2);text-align:center;padding:1.1rem}.ln-dia-side-h{font-family:var(--font-display);margin-bottom:.4rem;font-size:1.1rem;font-weight:700}.ln-dia-side-h.accent2{color:var(--accent2)}.ln-dia-side-h.accent{color:var(--accent)}.ln-dia-side-b{color:var(--text);font-size:.95rem}.ln-dia-side-s{color:var(--muted);font-family:var(--font-mono);margin-top:.2rem;font-size:.74rem}.ln-rag-query{font-family:var(--font-mono);color:var(--accent2);opacity:0;border:1px solid color-mix(in srgb, var(--accent2) 40%, var(--line));border-radius:999px;padding:.4rem .9rem;font-size:.95rem}.ln-rag-stage{transition:border-color .3s,color .3s,box-shadow .3s}.ln-rag-stage.on{border-color:var(--accent2);color:var(--accent2);box-shadow:0 0 0 1px var(--accent2), 0 0 22px -4px var(--accent2)}.ln-rag-answer{min-height:1.6rem;color:var(--text);opacity:0;border-left:3px solid var(--accent2);text-align:left;max-width:40ch;padding-left:.9rem;font-size:1rem}.ln-rag-replay{margin-top:.3rem}.ln-static .ln-rag-query,.ln-static .ln-rag-answer{opacity:1!important}.ln-nw-slot{text-align:center;min-width:4ch;transition:opacity .12s}.ln-nw-slot.guessing{opacity:.55}.ln-toy input[type=range].ln-nudge{animation:1.6s ease-in-out infinite ln-nudge}@keyframes ln-nudge{0%,to{opacity:1}50%{opacity:.55}}@media (prefers-reduced-motion:reduce){.ln-toy input[type=range].ln-nudge{animation:none}}.ln-svg{aspect-ratio:1;width:100%;max-width:460px;margin-inline:auto;display:block}.ln-axis{stroke:var(--line2);stroke-width:2px}.ln-vec{stroke-width:6px;stroke-linecap:round}.ln-vec.a{stroke:var(--accent2)}.ln-vec.b{stroke:var(--accent)}.ln-arc{fill:none;stroke:var(--accent2);stroke-width:2px;stroke-dasharray:5 5}.ln-node{fill:color-mix(in srgb, var(--accent) 26%, var(--panel2));stroke:var(--accent);stroke-width:2.5px}.ln-node.animal{stroke:var(--f-foundational)}.ln-node.royal{stroke:var(--accent)}.ln-node.office{stroke:var(--f-advanced)}.ln-svg-label{fill:var(--text);font-family:var(--font-display);font-size:30px;font-weight:700}.ln-svg-label.sm{font-family:var(--font-mono);paint-order:stroke;stroke:var(--ink);stroke-width:4px;stroke-linejoin:round;font-size:17px}.ln-nn-link{stroke:var(--accent2);stroke-width:3px;stroke-dasharray:6 5;opacity:0;transition:opacity .2s}.ln-toy{border:1.5px solid color-mix(in srgb, var(--accent2) 45%, var(--line2));border-radius:var(--radius);background:linear-gradient(160deg, var(--panel), var(--panel2));box-shadow:var(--shadow), 0 0 0 1px color-mix(in srgb, var(--accent2) 10%, transparent), 0 0 40px -18px var(--accent2);margin:2rem 0;padding:1.2rem;position:relative}.ln-toy-head{flex-wrap:wrap;align-items:center;gap:.7rem;margin-bottom:1rem;display:flex}.ln-toy-tag{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent2);border:1px solid color-mix(in srgb, var(--accent2) 40%, transparent);background:color-mix(in srgb, var(--accent2) 10%, transparent);border-radius:6px;padding:.22rem .55rem;font-size:.62rem}.ln-toy-tag:before{content:"✦ "}.ln-toy-prompt{font-family:var(--font-display);color:var(--text);font-size:1rem;font-weight:600}.ln-toy-note{min-height:1.5rem;color:var(--muted);margin-top:1rem;font-size:.98rem;line-height:1.5}.ln-toy-note b{color:var(--accent2);font-weight:700;font-family:var(--font-mono)}.ln-toy-note .w{color:var(--text);font-weight:600}.ln-toy-controls{flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:.9rem;display:flex}.ln-toy label{font-family:var(--font-mono);color:var(--muted);letter-spacing:.06em;font-size:.72rem}.ln-toy input[type=range]{min-width:160px;accent-color:var(--accent2);flex:1}.ln-chip{font-family:var(--font-mono);border:1px solid var(--line2);background:var(--panel2);min-height:2.5rem;color:var(--text);cursor:pointer;border-radius:999px;align-items:center;padding:.35rem .8rem;font-size:.74rem;transition:border-color .2s,color .2s;display:inline-flex}.ln-chip:hover,.ln-chip:focus-visible{border-color:var(--accent2);color:var(--accent2)}.ln-chip[aria-pressed=true]{border-color:var(--accent);color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, var(--panel2))}.ln-readout{font-family:var(--font-mono);color:var(--accent2);font-size:.95rem}.ln-readout b{color:var(--text)}.ln-drag{cursor:grab}.ln-drag:active{cursor:grabbing}.ln-word .ln-node{transition:r .14s,stroke-width .14s}.ln-word.ln-drag:hover .ln-node{r:12}.ln-word.sel .ln-node{fill:color-mix(in srgb, var(--accent) 30%, var(--panel2));stroke:var(--accent2);stroke-width:4px}.ln-word.sel .ln-svg-label{fill:var(--accent2)}.ln-word.hint .ln-node{animation:1.8s ease-in-out infinite ln-handle-pulse}@keyframes ln-handle-pulse{0%,to{r:8}50%{r:12}}.ln-drag:focus-visible{outline:none}.ln-drag:focus-visible circle{stroke:var(--accent2);stroke-width:3px}.ln-card:focus-visible,.ln-related a:focus-visible,.ln-next:focus-visible,.ln-crumbs a:focus-visible,.ln-foot a:focus-visible{outline:2px solid var(--accent2);outline-offset:3px;border-radius:var(--radius-sm)}.ln-chip:focus-visible{outline:2px solid var(--accent2);outline-offset:2px}.ln-toy input[type=range]:focus-visible{outline:2px solid var(--accent2);outline-offset:4px}.ln-demo-answer{border-left:3px solid var(--accent2);color:var(--text);min-height:2.4rem;margin-top:1rem;padding:.5rem 0 .5rem 1rem}.ln-demo-answer .cursor{color:var(--accent2)}.ln-demo-prompt{font-family:var(--font-mono);color:var(--muted);white-space:pre-wrap;background:var(--ink2);border:1px solid var(--line);border-radius:var(--radius-sm);margin-top:.8rem;padding:.8rem 1rem;font-size:.8rem}.ln-related{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.8rem;margin-top:3rem;display:grid}.ln-related a{border:1px solid var(--line);border-radius:var(--radius);color:var(--text);background:var(--panel);transition:border-color .2s, transform 1.05s linear(0, .0726, .2529, .4862, .7259, .9371, 1.0986, 1.2019, 1.2488, 1.2485, 1.2141, 1.1597, 1.0983, 1.0403, .9928, .9595, .9409, .9356, .9406, .9524, .9675, .983, .9964, 1.0067, 1.0132, 1.0161, 1.016, 1.0137, 1.0101, 1.0062, 1.0025, .9994, .9973, .9962, 1);padding:1rem 1.2rem;text-decoration:none;display:block}.ln-related a:hover{border-color:var(--accent2);transform:translateY(-2px)}.ln-related .k{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent2);font-size:.66rem}.ln-next{font-family:var(--font-mono);letter-spacing:.06em;color:var(--accent2);border:1px solid color-mix(in srgb, var(--accent2) 40%, var(--line));border-radius:var(--radius-sm);align-items:center;gap:.5rem;margin-top:2.4rem;padding:.7rem 1.1rem;font-size:.82rem;text-decoration:none;transition:border-color .2s;display:inline-flex}.ln-next:hover{border-color:var(--accent2)}.ln-crumbs{font-family:var(--font-mono);color:var(--faint);letter-spacing:.04em;padding:1.2rem 0 .4rem;font-size:.72rem}.ln-crumbs a{color:var(--muted);text-decoration:none}.ln-crumbs a:hover{color:var(--accent2)}.ln-hub-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;margin:2.4rem 0;display:grid}.ln-card{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(160deg, var(--panel), var(--panel2));color:var(--text);padding:1.4rem;text-decoration:none;transition:border-color .25s,transform .25s;position:relative;overflow:hidden}.ln-card:hover{border-color:var(--accent2);transform:translateY(-3px)}.ln-card .num{font-family:var(--font-mono);color:var(--accent2);letter-spacing:.1em;font-size:.72rem}.ln-card h3{margin:.5rem 0;font-size:1.15rem}.ln-card p{color:var(--muted);margin:0;font-size:.92rem}.ln-card .chap{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--faint);font-size:.6rem;position:absolute;top:1rem;right:1.1rem}.ln-foot{border-top:1px solid var(--line);color:var(--faint);margin-top:4rem;padding:2.4rem 0;font-size:.9rem}.ln-foot a{color:var(--muted);text-decoration:none}.ln-foot a:hover{color:var(--accent2)}@media (prefers-reduced-motion:reduce){.ln-reveal{opacity:1!important;transition:none!important;transform:none!important}.ln-cue,.ln-progress{display:none!important}.ln *{animation:none!important}}.ln-static .ln-aurora span,.ln-static .ln-grid{animation:none!important}.ln-static .ln-cue{display:none}.ln-ring{fill:color-mix(in srgb, var(--accent) 7%, transparent);stroke-width:2.5px;transform-origin:50%;transform-box:fill-box}.ln-ring.accent{stroke:var(--accent)}.ln-ring.sky{stroke:var(--f-intermediate);fill:color-mix(in srgb, var(--f-intermediate) 7%, transparent)}.ln-ring.green{stroke:var(--f-foundational);fill:color-mix(in srgb, var(--f-foundational) 8%, transparent)}.ln-ring.teal{stroke:var(--accent2);fill:color-mix(in srgb, var(--accent2) 12%, transparent)}.ln-ring-label.accent{fill:var(--accent)}.ln-ring-label.sky{fill:var(--f-intermediate)}.ln-ring-label.green{fill:var(--f-foundational)}.ln-ring-label.teal{fill:var(--accent2)}.ln-svg-label.dim{fill:var(--muted);font-size:14px}.ln-svg-label.accent{fill:var(--accent2)}.ln-legend{gap:.45rem;width:100%;max-width:460px;margin-top:.4rem;display:grid}.ln-legend.row{flex-wrap:wrap;justify-content:center;gap:.4rem 1.2rem;margin-top:.6rem;display:flex}.ln-legend-row{color:var(--muted);align-items:center;gap:.55rem;font-size:.92rem;display:flex}.ln-legend-row b{color:var(--text);font-weight:600}.ln-legend-dot{background:var(--accent);border-radius:50%;flex:none;width:10px;height:10px}.ln-legend-dot.sky{background:var(--f-intermediate)}.ln-legend-dot.green{background:var(--f-foundational)}.ln-legend-dot.teal{background:var(--accent2)}.ln-legend-dot.ham{box-shadow:0 0 0 2px var(--f-foundational) inset;background:0 0}.ln-legend-dot.spam{border:2px dashed var(--f-expert);box-sizing:border-box;background:0 0}.ln-legend-dot.flag{background:color-mix(in srgb, var(--accent2) 45%, var(--panel2));box-shadow:0 0 0 2px var(--line2) inset}.ln-svg.wide{aspect-ratio:auto;max-width:640px}@media (width<=520px){.ln-figure-stage:has(>.ln-svg.wide){justify-items:start;padding-inline:.6rem;overflow-x:auto}.ln-svg.wide{min-width:440px}}.ln-dia-cards{grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.7rem;width:100%;display:grid}.ln-dcard{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--panel2);gap:.25rem;padding:.8rem .9rem;display:grid}.ln-dcard b{font-family:var(--font-display);color:var(--text);font-size:.98rem}.ln-dcard span{color:var(--muted);font-size:.88rem;line-height:1.45}.ln-dia-side.left{text-align:left}.ln-dia-side-h.muted{color:var(--muted)}.ln-dia-list{color:var(--muted);gap:.35rem;margin:.3rem 0 0;padding-left:1.1rem;font-size:.92rem;display:grid}.ln-dia-list li::marker{color:var(--accent2)}@media (width<=520px){.ln-dia-split{grid-template-columns:1fr}}.ln-mail{stroke-width:2.5px;fill:color-mix(in srgb, var(--panel2) 80%, transparent);transition:fill .2s}.ln-mail.ham{stroke:var(--f-foundational)}.ln-mail.spam{stroke:var(--f-expert);stroke-dasharray:3 2}.ln-mail.flag{fill:color-mix(in srgb, var(--accent2) 45%, var(--panel2))}.ln-threshold{stroke:var(--accent2);stroke-width:3px;stroke-dasharray:7 6;cursor:ew-resize}.ln-thr-hit{stroke:#0000;stroke-width:28px;cursor:ew-resize}.ln-wire{stroke:var(--accent2);stroke-linecap:round;transition:opacity .2s}.ln-wire.neg{stroke:var(--f-expert)}.ln-wire.off{opacity:.2}.ln-wire.out{stroke:var(--line2);stroke-width:3px}.ln-in circle{fill:var(--panel2);stroke:var(--line2);stroke-width:2.5px;transition:fill .2s,stroke .2s}.ln-in.on circle{fill:color-mix(in srgb, var(--accent2) 35%, var(--panel2));stroke:var(--accent2)}.ln-neuron{fill:var(--panel2);stroke:var(--accent);stroke-width:3px;transition:fill .25s,stroke .25s}.ln-neuron.fire{fill:color-mix(in srgb, var(--accent2) 40%, var(--panel2));stroke:var(--accent2)}.ln-svg-label.out{fill:var(--muted)}.ln-svg-label.out.fire{fill:var(--accent2)}.ln-toy-controls.col{flex-direction:column;align-items:stretch;gap:.5rem}.ln-toy-row{flex-wrap:wrap;align-items:center;gap:.7rem;display:flex}.ln-toy-row .ln-chip{text-align:left;min-width:9.5rem}.ln-toy-row input[type=range]{flex:1;min-width:120px}.ln-textarea{width:100%;font-family:var(--font-body);color:var(--text);background:var(--ink2);border:1px solid var(--line);border-radius:var(--radius-sm);resize:vertical;padding:.7rem .9rem;font-size:1rem;line-height:1.5}.ln-textarea:focus-visible{outline:2px solid var(--accent2);outline-offset:2px}.ln-tokens{flex-wrap:wrap;gap:.3rem;width:100%;min-height:2.2rem;margin-top:.8rem;display:flex}.ln-token{font-family:var(--font-mono);border:1px solid var(--line2);color:var(--text);border-radius:6px;padding:.22rem .5rem;font-size:.86rem}.ln-token.c0{background:color-mix(in srgb, var(--accent) 18%, var(--panel2))}.ln-token.c1{background:color-mix(in srgb, var(--accent2) 18%, var(--panel2))}.ln-token.c2{background:color-mix(in srgb, var(--f-advanced) 16%, var(--panel2))}.ln-token.c3{background:color-mix(in srgb, var(--f-intermediate) 18%, var(--panel2))}.ln-meter{background:var(--ink2);border:1px solid var(--line);border-radius:99px;width:100%;height:8px;margin-top:.8rem;overflow:hidden}.ln-meter-fill{transform-origin:0;background:linear-gradient(90deg, var(--accent), var(--accent2));width:100%;height:100%;transition:transform .28s cubic-bezier(.23,1,.32,1);display:block;transform:scaleX(.12)}.ln-toy .ln-toy-controls:first-child{margin-top:0}.ln-quiz{border:1px solid color-mix(in srgb, var(--accent) 35%, var(--line));border-radius:var(--radius);background:linear-gradient(160deg, var(--panel), var(--panel2));box-shadow:var(--shadow);margin:2.6rem 0 1rem;padding:1.3rem 1.4rem}.ln-quiz-h{font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 .9rem;font-size:.72rem;font-weight:600}.ln-quiz-list{gap:1.3rem;margin:0;padding:0;list-style:none;display:grid}.ln-q-text{color:var(--text);margin:0 0 .6rem;font-size:1.02rem;font-weight:600}.ln-q-opts{gap:.4rem;display:grid}.ln-q-opt{text-align:left;font-family:var(--font-body);color:var(--text);background:var(--panel2);border:1px solid var(--line2);border-radius:var(--radius-sm);cursor:pointer;padding:.6rem .85rem;font-size:.95rem;transition:border-color .2s,background .2s}.ln-q-opt:hover:not(:disabled),.ln-q-opt:focus-visible{border-color:var(--accent2)}.ln-q-opt:focus-visible{outline:2px solid var(--accent2);outline-offset:2px}.ln-q-opt:disabled{cursor:default;color:var(--muted)}.ln-q-opt.is-correct{border-color:var(--f-foundational);background:color-mix(in srgb, var(--f-foundational) 14%, var(--panel2));color:var(--text)}.ln-q-opt.is-wrong{border-color:var(--f-expert);background:color-mix(in srgb, var(--f-expert) 14%, var(--panel2));color:var(--text)}.ln-q-opt.is-correct:before{content:"✓ ";color:var(--f-foundational);font-weight:700}.ln-q-opt.is-wrong:before{content:"✕ ";color:var(--f-expert);font-weight:700}.ln-q-why:focus{outline:none}.ln-q-why:focus-visible{outline:2px solid var(--accent2);outline-offset:4px;border-radius:4px}.ln-q-why{color:var(--muted);border-left:3px solid var(--accent2);margin:.55rem 0 0;padding-left:.8rem;font-size:.92rem}.ln-quiz-score{font-family:var(--font-mono);color:var(--accent2);min-height:1.2rem;margin:1.1rem 0 0;font-size:.78rem}.ln-q-nojs{color:var(--muted);margin-top:.5rem;font-size:.9rem;display:none}.ln-q-nojs summary{cursor:pointer;color:var(--accent2);font-family:var(--font-mono);font-size:.74rem}.ln-nojs .ln-q-nojs{display:block}.ln-nojs .ln-q-opt{pointer-events:none}.ln-terms{flex-wrap:wrap;align-items:center;gap:.45rem;margin:2rem 0 0;display:flex}.ln-terms .ln-terms-h{font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-right:.3rem;font-size:.7rem}.ln-terms a{font-family:var(--font-mono);color:var(--accent2);border:1px solid var(--line);border-radius:999px;align-items:center;min-height:2.5rem;padding:.3rem .8rem;font-size:.74rem;text-decoration:none;transition:border-color .2s;display:inline-flex}.ln-terms a:hover,.ln-terms a:focus-visible{border-color:var(--accent2)}.ln-done{font-family:var(--font-display);color:var(--text);background:var(--panel);border:1px solid var(--line2);border-radius:var(--radius-sm);cursor:pointer;padding:.6rem 1rem;font-size:.92rem;font-weight:600;transition:border-color .2s,color .2s}.ln-done:hover,.ln-done:focus-visible{border-color:var(--accent2)}.ln-done:focus-visible{outline:2px solid var(--accent2);outline-offset:2px}.ln-done.is-done{color:var(--f-foundational);border-color:color-mix(in srgb, var(--f-foundational) 50%, var(--line));background:color-mix(in srgb, var(--f-foundational) 10%, var(--panel))}.ln-nojs .ln-done{display:none}.ln-jump-row a.is-done:before{content:"✓ ";color:var(--f-foundational)}.ln-progress-note{font-family:var(--font-mono);color:var(--f-foundational);letter-spacing:.04em;min-height:1.1rem;margin-top:.6rem;font-size:.72rem}.ln-lesson-nav{flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:2.4rem;display:flex}.ln-lesson-nav .ln-next{margin-top:0}.ln-lesson-nav .ln-prev{color:var(--muted);border-color:var(--line)}.ln-lesson-nav .spacer{flex:1}.ln-lesson-nav .ln-done{margin-left:auto}.ln-chapter-foot{flex-wrap:wrap;align-items:center;gap:.6rem;margin-top:1.6rem;display:flex}.ln-path{counter-reset:pathstep;gap:1rem;margin:2.2rem 0;display:grid}.ln-path .ln-card{grid-template-columns:auto 1fr;align-items:start;gap:1.1rem;padding:1.3rem 1.4rem;display:grid}.ln-path .ln-card .step{counter-increment:pathstep;font-family:var(--font-display);color:#0000;-webkit-text-stroke:1.5px var(--line2);min-width:2.6rem;font-size:2.2rem;font-weight:700;line-height:1}.ln-path .ln-card .step:before{content:"0" counter(pathstep)}.ln-path .ln-card h3{margin:.1rem 0 .4rem;font-size:1.25rem}.ln-path .ln-card p{color:var(--muted);margin:0;font-size:.95rem}.ln-path .ln-card p.ln-card-meta,.ln-card-meta{font-family:var(--font-mono);letter-spacing:.06em;color:var(--muted);min-height:1rem;margin-top:.7rem;font-size:.72rem}.ln-card-meta span{color:var(--f-foundational)}.ln-card .tag-new{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent2);border:1px solid color-mix(in srgb, var(--accent2) 40%, transparent);vertical-align:middle;border-radius:6px;margin-left:.5rem;padding:.15rem .45rem;font-size:.6rem}.ln-more{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:.8rem;margin:1.4rem 0 0;display:grid}.ln-more a{border:1px solid var(--line);border-radius:var(--radius);color:var(--text);background:var(--panel);padding:1rem 1.15rem;text-decoration:none;transition:border-color .2s;display:block}.ln-more a:hover,.ln-more a:focus-visible{border-color:var(--accent2)}.ln-more .k{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent2);margin-bottom:.3rem;font-size:.64rem;display:block}.ln-more span.d{color:var(--muted);font-size:.88rem}.ln-section h2.ln-section-h,.ln-section-h{font-family:var(--font-mono);letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:2.6rem 0 .4rem;font-size:.72rem;font-weight:600}@media (width<=520px){.ln-path .ln-card{grid-template-columns:1fr}.ln-path .ln-card .step{font-size:1.6rem}}.ln-q-opt,.ln-done,.ln-chip,.ln-next{transition-property:border-color,color,background-color,transform;transition-duration:.16s;transition-timing-function:cubic-bezier(.23,1,.32,1)}.ln-q-opt:active:not(:disabled),.ln-done:active,.ln-chip:active,.ln-next:active{transform:scale(.97)}@media (hover:none){.ln-card:hover,.ln-related a:hover,.ln-more a:hover,.ln-path .ln-card:hover{transform:none}}@media (prefers-reduced-motion:reduce){.ln-q-opt:active,.ln-done:active,.ln-chip:active,.ln-next:active{transform:none}}