:root{--paper:#f6f4ed;--surface:#fffef9;--ink:#252d29;--muted:#666a62;--line:#d9d7cc;--red:#c63525;--red-dark:#a72c20;--wash:#f9e5dd;--green:#335d48;--mono:'SFMono-Regular',Consolas,'Liberation Mono',monospace;--sans:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}*{box-sizing:border-box}html{scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.6}a{color:inherit}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #2462a3;outline-offset:4px}button{color:inherit}input[type=range]{accent-color:var(--red);width:100%}input[type=checkbox]{accent-color:var(--red);width:18px;height:18px}select,input[type=text],input[type=number]{border:1px solid #b9bbae;border-radius:5px;padding:9px 11px;background:var(--surface);color:var(--ink);min-height:42px}input[type=number]{width:75px}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3{font-weight:550;letter-spacing:-.055em;line-height:1.08}h2{font-size:clamp(32px,4vw,52px);margin-bottom:22px}h3{font-size:26px;letter-spacing:-.035em}p{margin-bottom:18px}button svg{pointer-events:none}svg{max-width:100%}.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--ink);color:white;padding:10px 20px}.skip-link:focus{top:10px}.site-header{max-width:1440px;margin:auto;height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 5%;border-bottom:1px solid var(--line)}.wordmark{font-size:22px;letter-spacing:-1px;font-weight:750;display:inline-flex;gap:10px;align-items:center;text-decoration:none;white-space:nowrap}.wordmark-light{font-weight:400}.site-header nav{display:flex;gap:30px;font-size:14px;font-weight:550}.site-header nav a{text-decoration:none;padding:8px 0}.site-header nav a:hover{color:var(--red)}.header-cta{font-size:13px;font-weight:650;text-decoration:none;border:1px solid var(--ink);border-radius:30px;padding:10px 18px;white-space:nowrap}.header-cta span{margin-left:14px}.hero-wrap{border-bottom:1px solid var(--line)}.hero{max-width:1440px;margin:auto;padding:78px 5% 68px;display:grid;grid-template-columns:1.05fr 1fr;gap:5%;align-items:center}.eyebrow,.section-label{font:11px/1.6 var(--mono);letter-spacing:1.7px;font-weight:600;text-transform:uppercase}.live-dot{display:inline-block;width:7px;height:7px;background:var(--red);border-radius:100%;margin-right:9px}.hero h1{font-size:clamp(60px,6.8vw,99px);line-height:1.01;margin:29px 0 26px;letter-spacing:-.075em;font-weight:500}.hero h1 em{font-family:Georgia,'Times New Roman',serif;font-weight:400;letter-spacing:-.06em;color:var(--red)}.hero-description{font-size:19px;line-height:1.65;color:#555e55;margin-bottom:30px}.hero-actions{display:flex;gap:26px;align-items:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:24px;border:1px solid transparent;text-decoration:none;padding:13px 20px;font-size:13px;font-weight:650;border-radius:5px;min-height:44px;transition:background .15s,transform .15s}.btn:hover{transform:translateY(-1px)}.primary{background:var(--red);color:#fff}.primary:hover{background:var(--red-dark)}.secondary{background:transparent;border-color:#bec0b4}.secondary:hover{background:#e9e9df}.text-link{font-size:13px;text-decoration:underline;text-underline-offset:5px}.text-link span{margin-left:5px}.hero-meta{display:flex;gap:20px;margin-top:42px;font:10px/1.7 var(--mono);color:var(--muted);flex-wrap:wrap}.hero-meta span:not(:first-child):before{content:'·';margin-right:16px}.hero-art{background:#eeede4;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 18px 35px -25px #444}.art-top,.art-bottom{display:flex;align-items:center;justify-content:space-between;padding:19px 23px}.art-top .eyebrow{font-size:9px;letter-spacing:1px}.art-coord{font:9px var(--mono);color:var(--muted)}.hero-art>svg{display:block;width:100%;height:auto}.art-bottom{border-top:1px solid var(--line);font-size:11px;line-height:1.6}.art-stamp{font:10px/1.4 var(--mono);border:1px solid #9eaa93;border-radius:50%;width:53px;height:53px;display:flex;align-items:center;justify-content:center;text-align:center;transform:rotate(-12deg);color:#536447}.chapter-rail{background:#eeede4;border-bottom:1px solid var(--line)}.rail-inner{max-width:1296px;margin:auto;display:flex;align-items:center;gap:22px;padding:17px 0}.rail-inner>.eyebrow{font-size:10px;color:var(--muted)}#progress-dots{display:flex;gap:8px;flex:1}#progress-dots a{display:block;width:29px;height:5px;background:#c9cbbd;border-radius:4px}#progress-dots a.done{background:var(--green)}#progress-summary{font:11px var(--mono);color:var(--muted)}.section{max-width:1296px;margin:auto;padding:83px 0;border-bottom:1px solid var(--line);scroll-margin-top:20px}.section-label{color:var(--red);margin-bottom:34px}.intro-grid,.section-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:9%;align-items:start}.intro-grid .lead{font-size:18px;max-width:380px;color:var(--muted)}.intro-copy{padding-top:8px;color:#545e55}.section-heading>p{max-width:450px;color:var(--muted);padding-top:7px}.architecture-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:27px}.architecture-card{border:1px solid var(--line);border-radius:8px;padding:26px;text-decoration:none;background:#faf9f3;display:flex;flex-direction:column;transition:transform .2s,border-color .2s}.architecture-card:hover{transform:translateY(-4px);border-color:var(--red)}.architecture-card.featured{background:var(--wash);border-color:#eac6b7}.card-number{display:flex;align-items:center;justify-content:space-between;font:18px var(--mono);color:var(--muted)}.card-number span{font-size:10px;letter-spacing:1px}.architecture-card h3{margin-bottom:12px}.architecture-card p{color:#60675f;font-size:14px;max-width:265px}.card-foot{font:10px/1.6 var(--mono);border-top:1px solid var(--line);padding-top:19px;margin-top:auto}.mini-cnn{display:grid;grid-template-columns:repeat(3,18px);gap:4px;margin:28px 0;height:62px}.mini-cnn i{background:#b6c5ae;border-radius:3px}.mini-cnn i:nth-child(3n){background:#345940}.mini-rnn,.mini-attn{display:flex;align-items:center;gap:8px;height:62px;margin:28px 0}.mini-rnn b{font:14px var(--mono);border:1px solid #768e7c;border-radius:8px;padding:10px}.mini-rnn span{color:#768e7c}.mini-attn span{font:16px var(--mono);background:var(--red);color:white;border-radius:5px;padding:10px}.mini-attn i{font-style:normal;color:var(--red)}.lab{background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:27px 0}.lab-topbar{padding:18px 25px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.lab-topbar .eyebrow{font-size:10px;letter-spacing:1px}.pill{font:10px var(--mono);background:#edf0e6;color:#526644;border:1px solid #d4dccb;padding:5px 9px;border-radius:20px;display:inline-block}.lab-body{padding:26px}.lab-toolbar{display:flex;align-items:end;gap:22px;flex-wrap:wrap;margin-bottom:28px}.control{display:grid;gap:6px;min-width:130px;font-size:12px;color:var(--muted)}.control>span,.control>label{font-weight:600}.control input[type=range]{margin:10px 0}.check-control{display:flex;align-items:center;gap:8px;font-size:12px;padding:10px 0}.experiment-grid{display:grid;grid-template-columns:1fr .75fr 1fr;gap:32px;align-items:start}.matrix-label{display:flex;justify-content:space-between;align-items:center;font:10px var(--mono);text-transform:uppercase;letter-spacing:1px;margin-bottom:15px;color:var(--muted)}.matrix{display:grid;gap:5px;width:max-content;max-width:100%}.matrix-cell{border:1px solid #d9dbd0;border-radius:4px;background:#f1f3e9;min-width:0;display:flex;align-items:center;justify-content:center;font:13px var(--mono);height:44px;width:44px;padding:0;transition:background .12s}.matrix button:hover{outline:2px solid var(--red);outline-offset:1px}.matrix-cell.dark{background:#385d47;color:white;border-color:#385d47}.matrix-cell.window{outline:2px solid var(--red);outline-offset:-2px}.matrix-cell.active{border:2px solid var(--red);box-shadow:0 0 0 2px #f4c1b8}.matrix.kernel .matrix-cell{background:#f5e6dd;color:#943626;width:44px}.matrix-help{font-size:11px;color:var(--muted);margin-top:13px;max-width:235px}.calculation{margin-top:26px;background:#f3f2e9;border:1px solid #e4e2d7;border-radius:7px;padding:20px 23px;overflow-wrap:anywhere}.formula{font:14px/1.85 var(--mono);padding:16px 20px;background:#efefe6;border-left:3px solid var(--red);margin:18px 0;overflow-x:auto;letter-spacing:-.3px}.calculation .formula{background:transparent;border:0;padding:8px 0 0;margin:0;overflow-x:visible}.calculation .result{font-size:25px;color:var(--red);font-weight:600}.note{font-size:12px;color:var(--muted);line-height:1.75}.lab .note{margin-bottom:0}.lesson-details{margin:27px 0}.lesson-details details{border-top:1px solid var(--line)}summary{cursor:pointer;padding:18px 0;font-weight:600;font-size:14px;list-style:none;display:flex;justify-content:space-between;gap:20px}summary::-webkit-details-marker{display:none}summary:after{content:'+';font:24px/1 var(--mono);color:var(--red)}details[open]>summary:after{content:'−'}.lesson-body{max-width:880px;padding:12px 0 24px;color:#4b564d;font-size:15px}.lesson-body h3{font-size:23px;color:var(--ink);margin-top:24px;margin-bottom:14px}.lesson-body h4{color:var(--ink)}.lesson-body a{color:var(--red)}.lesson-body li{margin:9px 0}.complete{font-size:12px;padding:9px 15px}.complete[aria-pressed=true]{background:#e5ecdf;color:#33543c;border-color:#b8c9ac}.attention-layout{display:grid;grid-template-columns:1fr 1.15fr;gap:40px}.tokens{display:flex;gap:7px;flex-wrap:wrap;margin:12px 0 22px}.token{border:1px solid #d5d6cd;background:#f3f2e9;padding:9px 13px;border-radius:5px;min-height:43px;font:12px var(--mono)}.token[aria-pressed=true]{background:var(--red);color:white;border-color:var(--red)}.heatmap{display:grid;gap:4px;grid-template-columns:60px repeat(4,1fr);max-width:390px}.heat-cell{min-height:49px;display:flex;align-items:center;justify-content:center;border:0;border-radius:3px;font:11px var(--mono);padding:5px}.heat-label{font:10px var(--mono);display:flex;align-items:center;justify-content:center;color:var(--muted)}.heat-cell.selected-row{outline:2px solid var(--ink);outline-offset:-2px}.heat-cell.masked{background:repeating-linear-gradient(135deg,#ecece3,#ecece3 5px,#f8f7f0 5px,#f8f7f0 10px);color:#666}.attention-result{margin-top:21px}.attention-result .formula{font-size:12px;margin:12px 0}.scores{display:grid;gap:12px;margin-top:15px}.score-row{display:grid;grid-template-columns:42px 1fr 49px;align-items:center;gap:9px;font:11px var(--mono)}.score-track{height:17px;background:#eeece2;border-radius:3px;overflow:hidden}.score-bar{height:100%;background:var(--red);border-radius:3px}.output-vector{font:25px var(--mono);color:var(--red);letter-spacing:-1px;margin:17px 0}.matrix-editors{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.edit-matrix{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.edit-matrix input{width:100%;text-align:center;font:12px var(--mono);padding:6px;min-height:40px}.editor-token{font:10px var(--mono);grid-column:span 2;margin-top:7px;color:var(--muted)}.error{color:#ae271d;font-size:13px;min-height:22px;margin:10px 0}.error:empty{display:none}.temperature-label{font-variant-numeric:tabular-nums}.transformer-map{border:1px solid var(--line);border-radius:9px;background:#eeeee5;display:grid;grid-template-columns:1fr 1fr 1.05fr;gap:25px;padding:28px;margin:28px 0}.stack-title{display:flex;align-items:center;justify-content:space-between;font:12px var(--mono);margin-bottom:20px}.stack-title span{font-size:10px;color:var(--muted)}.architecture-stack{border:1px dashed #bfc6b7;padding:15px;border-radius:7px;display:flex;flex-direction:column;gap:9px}.arch-block{border:1px solid #cdd3c4;background:#f8f9f1;border-radius:5px;padding:13px;text-align:left;font-size:12px;min-height:45px}.arch-block:hover,.arch-block[aria-pressed=true]{border-color:var(--red);background:var(--wash)}.arch-block.accent{background:#e2e9da}.stack-arrow{text-align:center;font-size:18px;line-height:1;color:#778770}.arch-info{background:var(--ink);color:#f7f6ec;border-radius:7px;padding:24px}.arch-info h3{font-size:25px;line-height:1.2;margin:22px 0 17px}.arch-info p{font-size:13px;color:#d1d7c9;line-height:1.8}.arch-info .eyebrow{color:#f3947d;font-size:9px}.arch-info code{color:#f5b09f;font-size:12px}.arch-legend{font-size:11px;color:var(--muted);margin:14px 0 0}.position-heading{margin-top:50px}.position-heading .eyebrow{color:var(--red)}.position-heading h3{margin:16px 0}.position-heading p{color:var(--muted);font-size:14px}.quiz{display:grid;grid-template-columns:220px 1fr;border:1px solid var(--line);border-radius:9px;background:var(--surface);margin:27px 0;overflow:hidden}.quiz-sidebar{padding:25px;background:#eeeee5;border-right:1px solid var(--line)}.quiz-sidebar h3{font-size:22px;margin:19px 0 12px}.quiz-sidebar p{font-size:12px;color:var(--muted)}.quiz-numbers{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin-top:24px}.quiz-number{min-height:36px;border:1px solid #ced1c4;background:#faf9f2;border-radius:4px;font:11px var(--mono)}.quiz-number[aria-current=true]{outline:2px solid var(--red)}.quiz-number.solved{background:#345b44;color:white;border-color:#345b44}.quiz-main{padding:32px}.quiz-main h3{font-size:25px;line-height:1.3;letter-spacing:-.03em;margin:17px 0 23px}.quiz-choice{display:flex;align-items:start;gap:12px;text-align:left;width:100%;border:1px solid var(--line);background:transparent;padding:13px 16px;border-radius:5px;margin-bottom:9px;font-size:14px;min-height:46px}.quiz-choice .letter{font:11px var(--mono);padding-top:2px;color:var(--muted)}.quiz-choice:hover{background:#efefe6}.quiz-choice.correct{background:#e5eedd;border-color:#83a36c}.quiz-choice.incorrect{background:#f9e4dd;border-color:#c77e6b}.quiz-feedback{padding:19px 21px;border-left:3px solid var(--green);background:#eff3e9;margin:21px 0;font-size:14px}.quiz-feedback p{margin:5px 0 0}.quiz-navigation{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:25px}.quiz-count{font:11px var(--mono);color:var(--muted)}.sources-section{padding-bottom:60px}.source-list{display:grid;grid-template-columns:1fr 1fr;column-gap:40px}.source{padding:23px 0;border-top:1px solid var(--line);text-decoration:none;display:block}.source-title{font-size:15px;font-weight:650;display:flex;justify-content:space-between;gap:20px}.source p{font-size:12px;color:var(--muted);margin:9px 0 0;max-width:480px}.source:hover .source-title{color:var(--red)}.privacy-details{margin-top:35px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.button-row{display:flex;gap:12px;flex-wrap:wrap}.footer{max-width:1296px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:35px 0 45px;font-size:11px;color:var(--muted)}.footer .wordmark{color:var(--ink);font-size:20px;gap:0}.footer p{margin:0}.no-script{padding:30px;background:var(--wash);text-align:center}.not-found{max-width:700px;margin:15vh auto;padding:30px}.not-found h1{font-size:60px;margin-top:20px}.not-found p{color:var(--muted)}
@media(min-width:1441px){.hero{padding-left:72px;padding-right:72px}}@media(max-width:1400px){.section,.rail-inner,.footer{margin-left:5%;margin-right:5%}.hero-meta{gap:10px}.hero-meta span:not(:first-child):before{margin-right:10px}}@media(max-width:1000px){.site-header nav{gap:18px}.hero{gap:4%;padding-top:55px}.hero h1{font-size:70px}.hero-description{font-size:17px}.hero-actions{gap:17px}.hero-meta{font-size:9px}.hero-art .art-coord{display:none}.section{padding-top:65px;padding-bottom:65px}.experiment-grid{gap:18px}.matrix-cell{width:36px;height:36px}.matrix.kernel .matrix-cell{width:36px}.transformer-map{grid-template-columns:1fr 1fr;gap:20px}.arch-info{grid-column:span 2}.arch-info h3{margin-top:14px}.architecture-card{padding:21px}.card-foot{font-size:9px}.attention-layout{gap:25px}.footer{flex-wrap:wrap}.footer p{order:3;flex-basis:100%}}
@media(max-width:720px){html{scroll-padding-top:20px}.site-header{height:76px;flex-wrap:wrap;gap:10px}.site-header nav{display:none}.wordmark{font-size:20px}.wordmark img{width:27px;height:27px}.header-cta{padding:8px 12px;font-size:11px}.header-cta span{margin-left:4px}.hero{grid-template-columns:1fr;padding-top:42px;gap:35px;padding-bottom:37px}.hero h1{font-size:72px;margin-top:23px}.hero .eyebrow{font-size:9px}.hero-description{font-size:17px}.hero-actions{gap:22px}.hero-meta{margin-top:26px;font-size:9px}.hero-art{max-width:570px}.hero-art svg{max-height:340px}.art-top,.art-bottom{padding:15px 20px}.rail-inner{gap:12px;flex-wrap:wrap}.rail-inner>.eyebrow{font-size:8px}#progress-dots{gap:5px}#progress-dots a{width:17px}#progress-summary{font-size:9px}.section{padding:49px 0}.section-label{font-size:9px;margin-bottom:25px}.intro-grid,.section-heading{grid-template-columns:1fr;gap:3px}.intro-copy{font-size:14px}.section-heading>p{font-size:14px;padding-top:0;margin-bottom:8px}h2{font-size:38px;letter-spacing:-.05em}.architecture-cards{grid-template-columns:1fr;gap:15px;margin-top:23px}.architecture-card{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.card-number{grid-column:span 2}.architecture-card h3{grid-column:1;grid-row:3}.architecture-card p{grid-column:1 / -1;font-size:13px}.card-foot{grid-column:span 2;font-size:10px}.mini-cnn,.mini-rnn,.mini-attn{grid-column:1 / -1;margin:24px 0}.lab-body{padding:18px}.lab-topbar{padding:15px 18px}.lab-toolbar{gap:14px;margin-bottom:24px}.control{flex:1;min-width:116px}.experiment-grid{grid-template-columns:1fr 1fr;gap:23px 14px}.experiment-grid>.output-panel{grid-column:span 2}.matrix-cell{width:39px;height:39px;font-size:12px}.matrix.kernel .matrix-cell{width:34px}.matrix-label{font-size:9px}.matrix-help{font-size:10px}.calculation{padding:16px}.calculation .formula{font-size:12px}.attention-layout{grid-template-columns:1fr;gap:20px}.heatmap{max-width:100%}.matrix-editors{gap:12px}.edit-matrix input{font-size:11px;padding:3px}.lab .eyebrow{font-size:9px}.formula{font-size:12px;padding:12px;line-height:1.8}.lesson-body{font-size:14px}.lesson-body ul{padding-left:19px}.transformer-map{padding:16px;gap:13px}.architecture-stack{padding:9px;gap:7px}.arch-block{font-size:10px;padding:10px 7px;min-height:44px}.stack-title{font-size:11px;flex-wrap:wrap;gap:4px}.stack-title span{font-size:9px}.arch-legend{font-size:10px}.arch-info{padding:20px}.quiz{grid-template-columns:1fr}.quiz-sidebar{padding:20px;border-right:0;border-bottom:1px solid var(--line)}.quiz-sidebar h3{font-size:20px;margin:10px 0}.quiz-sidebar p{margin:0}.quiz-numbers{grid-template-columns:repeat(6,1fr);margin-top:15px}.quiz-main{padding:21px}.quiz-main h3{font-size:22px}.quiz-choice{font-size:13px;padding:12px}.quiz-feedback{font-size:13px;padding:15px}.source-list{grid-template-columns:1fr}.source-title{font-size:14px}.footer{padding-top:27px;padding-bottom:30px;font-size:9px;gap:17px}.footer p{font-size:11px}.privacy-details{font-size:12px}}
@media(max-width:390px){.hero h1{font-size:62px}.hero-actions{gap:17px}.text-link{font-size:11px}.hero-meta{gap:5px;font-size:8px}.experiment-grid{grid-template-columns:1fr}.experiment-grid>.output-panel{grid-column:auto}.matrix-cell{width:43px;height:43px}.matrix.kernel .matrix-cell{width:43px}.section h2{font-size:34px}.rail-inner{gap:8px}.matrix-editors{grid-template-columns:1fr}.edit-matrix{max-width:230px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.architecture-stack{border:0;padding:0}.repeat-group{display:flex;flex-direction:column;gap:9px;border:1px dashed #aeb9a6;border-radius:7px;padding:12px}.repeat-label{font:9px var(--mono);color:#586850;text-align:center;padding:2px 0 5px}@media(max-width:720px){.repeat-group{padding:7px;gap:7px}.repeat-label{font-size:8px}}
.control select{width:100%;min-width:0;max-width:100%}.lab-toolbar>.control{min-width:0;flex:1 1 130px}.lab-toolbar>.temperature-label{min-width:130px}.lab-toolbar .control select{font-size:12px}
/* Persistent navigation and deliberate keyboard focus for long study sessions. */
.site-header{position:sticky;top:0;z-index:20;background:rgba(246,244,237,.98);backdrop-filter:blur(12px);max-width:none;padding-left:max(5%,calc((100% - 1296px)/2));padding-right:max(5%,calc((100% - 1296px)/2))}.mobile-chapters{display:none}.import-label{position:relative;overflow:hidden;cursor:pointer}.import-label:focus-within{outline:3px solid #2462a3;outline-offset:3px}.import-label input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.learning-tools-section{max-width:1296px;margin:0 auto;padding:48px 0}.section{content-visibility:auto;contain-intrinsic-size:auto 1100px}#foundations{contain-intrinsic-size:auto 850px}#transformer{contain-intrinsic-size:auto 3200px}#practice{contain-intrinsic-size:auto 1000px}@media(max-width:1400px){.learning-tools-section{margin-left:5%;margin-right:5%}}@media(max-width:720px){html{scroll-padding-top:146px}.mobile-chapters{position:sticky;top:76px;z-index:19;display:flex;gap:20px;overflow-x:auto;white-space:nowrap;padding:12px 5%;background:#eeede4;border-bottom:1px solid var(--line);font:11px var(--mono)}.mobile-chapters a{text-decoration:none;padding:4px 0;min-height:24px;display:flex;align-items:center}.learning-tools-section{padding:28px 0}.section{contain-intrinsic-size:auto 1500px}#transformer{contain-intrinsic-size:auto 4700px}}
@media print{.site-header,.mobile-chapters,.chapter-rail,.hero-art{display:none}.section{content-visibility:visible;contain:none}.lab{break-inside:avoid}body{background:white}}