/* Extensions for the ML notes; existing article styles stay unchanged. */
.skip-link{position:fixed;top:-80px;left:12px;z-index:20;background:var(--surface);padding:10px}.skip-link:focus{top:10px}
.layout main>.breadcrumb{font:14px/1.7 var(--body);color:var(--muted);margin:0 0 28px}.breadcrumb a{text-decoration:none}
.chapter-deck{font-size:23px!important;font-family:var(--heading)!important;line-height:1.55!important;letter-spacing:0!important;text-transform:none!important;max-width:65ch!important;border:0!important;padding:0!important;margin:20px 0 30px!important}
.chapter-meta{font:11px/1.8 var(--mono);letter-spacing:.07em;text-transform:uppercase;color:var(--muted);margin:20px 0 26px}
.chapter-tools{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 30px}.chapter-tools a,.chapter-tools button,.lab-controls button,.lab-controls select,.resume-link{border:1px solid var(--accent-line);background:var(--surface);border-radius:5px;color:var(--accent);padding:9px 13px;font-size:14px;line-height:1.5;text-decoration:none}
.lead-question{font:italic 30px/1.4 var(--heading);padding:20px 0;color:var(--accent);border-bottom:1px solid var(--line);max-width:28ch}
.learning-goals{padding:22px 26px;border-left:3px solid var(--accent);background:var(--tint);margin:28px 0}.learning-goals p:first-child{margin-top:0}.learning-goals ul{margin-bottom:0}
.aside-note{padding:16px 22px;border-left:2px solid var(--accent-line);font-size:17px;margin:27px 0;color:var(--muted)}.aside-note p{margin:8px 0}.aside-note strong{color:var(--ink)}
.math-block{overflow-x:auto;overflow-y:hidden;padding:16px 10px;margin:22px 0;border:1px solid var(--line);border-radius:6px;background:var(--surface);font-size:19px}.katex-display{margin:.35em 0!important}.katex{font-size:1.06em!important}
.figure-frame{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden}.figure-frame img{border-radius:0}figcaption{display:block;line-height:1.6;font-size:14px}
.section-source{font:11px/1.7 var(--mono);color:var(--faint);margin:-12px 0 25px}.stop-point{margin:30px 0;padding:18px 22px;border-top:1px dashed var(--accent-line);border-bottom:1px dashed var(--accent-line);font-size:17px}.stop-point strong{color:var(--accent)}
.mobile-contents{display:none}.mobile-contents summary{font-size:16px}.mobile-contents ul{list-style:none;padding:0}.mobile-contents a{font-size:16px}
.chapter-list{list-style:none;padding:0;margin:30px 0}.chapter-list li{border-top:1px solid var(--line);padding:25px 0;margin:0}.chapter-list h3{margin:0 0 8px}.chapter-list p{margin:8px 0}.status{font:10px/1.6 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.status.ready{color:var(--accent)}
.lab{background:var(--surface);border:1px solid var(--accent-line);border-radius:9px;padding:24px;margin:30px 0}.lab h3{margin:0 0 12px}.lab-controls{display:flex;flex-wrap:wrap;gap:14px;align-items:end;margin:18px 0}.lab-controls label{display:flex;flex-direction:column;gap:5px;font-size:14px;color:var(--muted)}.lab-controls select{max-width:100%;min-height:43px}.lab-controls input[type=number]{width:85px;padding:9px;border:1px solid var(--line);border-radius:5px;font:16px var(--mono);background:var(--paper);color:var(--ink)}
.lab-grids{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:20px;align-items:start}.grid-label{font:11px/1.7 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin:10px 0}.number-grid{display:grid;gap:3px;width:100%;max-width:290px}.number-grid input,.number-grid button,.number-grid .number-cell{width:100%;min-width:0;aspect-ratio:1;border:1px solid var(--line);text-align:center;border-radius:3px;font:15px var(--mono);padding:0;background:var(--paper);color:var(--ink);display:grid;place-items:center}.number-grid input{appearance:textfield;-moz-appearance:textfield}.number-grid input::-webkit-inner-spin-button{appearance:none}.number-grid input.in-window{background:var(--tint);border-color:var(--accent);color:var(--accent)}.number-grid button.selected{background:var(--accent);color:white;border-color:var(--accent)}.number-grid button:hover{border-color:var(--accent)}
.lab-result{font:15px/1.9 var(--mono);padding:16px;background:var(--tint);border-radius:5px;margin-top:22px;overflow-wrap:anywhere}.lab-result p{margin:5px 0}.lab-help{font-size:15px;color:var(--muted)}.lab-controls .checkbox{display:flex;flex-direction:row;align-items:center;gap:8px;min-height:43px}
.formula-result{font-size:18px;color:var(--accent);font-weight:600}.checklist label{display:flex;align-items:baseline;gap:12px;margin:13px 0}.checklist input{accent-color:var(--accent);width:18px;height:18px;flex-shrink:0}.checklist{padding:0;list-style:none}.checklist li{margin:0}.chapter-end{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;margin:36px 0}
.exercise{scroll-margin-top:100px}.exercise details[data-hint]{background:var(--paper);border-style:dashed}.exercise details[data-hint] summary{font-size:16px;padding:14px 0}.exercise details[data-solution] summary{font-size:17px}.exercise>h3{margin-top:42px}
.resume-link[hidden]{display:none}
.training-table{font-size:16px;min-width:680px}.training-table th,.training-table td{padding:14px 16px;font-size:16px}.training-table input[type=number]{width:85px;max-width:100%;padding:9px 6px;border:1px solid var(--accent-line);border-radius:4px;font:16px var(--mono);color:var(--ink);background:var(--paper)}.training-table input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent)}.lab-controls input:disabled{opacity:.5}
#bn-eps{width:128px}#batchnorm-lab .training-table{min-width:0;table-layout:fixed}#batchnorm-lab .training-table th,#batchnorm-lab .training-table td{min-width:0;padding:12px 8px;font-size:15px;overflow-wrap:anywhere}#batchnorm-lab .training-table input[type=number]{width:74px}
.joint-table{min-width:510px;font-size:16px}.joint-table th,.joint-table td{padding:14px 12px;font-size:16px}.joint-table input{width:85px;max-width:100%;font:16px var(--mono);padding:9px 5px;border:1px solid var(--accent-line);border-radius:4px;background:var(--paper);color:var(--ink)}.joint-table tfoot th,.joint-table tfoot td{border-top:1px solid var(--accent-line);font-weight:600}.gaussian-figure{margin:24px 0;background:white;border:1px solid var(--line);border-radius:6px}.gaussian-figure svg{display:block;width:100%;height:auto}.lab-controls input[type=range]{width:130px;accent-color:var(--accent)}.lab-controls output{font:13px var(--mono);color:var(--accent)}
.sources-list{font-size:17px}.tag{font:11px var(--mono);color:var(--muted)}.resume-link{display:inline-block}.reading-status{font-size:14px;color:var(--muted)}
@media(max-width:1120px){.mobile-contents{display:block}.layout{max-width:1000px}.rail{display:none}}
@media(max-width:650px){.lab{padding:18px 14px}.lab-grids{grid-template-columns:1fr 1fr;gap:14px}.lab-grids>div:last-child{grid-column:1/-1}.lab-grids>div:last-child .number-grid{max-width:225px}.chapter-deck{font-size:22px!important}.math-block{font-size:17px}.lead-question{font-size:27px}.number-grid input,.number-grid button{font-size:14px}.chapter-tools{gap:8px}.chapter-tools button,.chapter-tools a{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
@media print{.chapter-tools,.mobile-contents,.lab-controls,.resume-link,.stop-point button,.skip-link{display:none!important}.math-block{overflow:visible;border:0;padding:4px 0;font-size:11pt}.lab{break-inside:avoid;padding:12px}.lab-grids{display:flex;gap:20px}.lab-grids>div{flex:1}.lab-help,.lab-result{font-size:9pt}.number-grid input,.number-grid button{font-size:9pt}.chapter-deck{font-size:16pt!important}.figure-frame{border:0}.aside-note{font-size:10pt}.learning-goals{padding:12px}.chapter-meta{font-size:8pt}.chapter-list li{break-inside:avoid}.katex-display{overflow:visible!important}.section-source{font-size:8pt}.checklist input{width:12px;height:12px}}
@media print{.training-table,#batchnorm-lab .training-table{min-width:0}.training-table th,.training-table td,#batchnorm-lab .training-table th,#batchnorm-lab .training-table td{font-size:9pt;padding:8px}.training-table input[type=number]{width:65px;font-size:9pt;padding:5px}.training-table input[type=checkbox]{width:13px;height:13px}}
@media print{.joint-table{min-width:0}.joint-table th,.joint-table td,.joint-table input{font-size:9pt;padding:7px}.joint-table input{width:60px}.gaussian-figure{break-inside:avoid}.gaussian-figure svg{max-height:310px}}

.chart-scroll-help{display:none}@media(max-width:650px){.gaussian-figure{overflow-x:auto}.gaussian-figure svg{min-width:700px}.chart-scroll-help{display:block;font-size:14px;color:var(--muted)}}@media print{.chart-scroll-help{display:none}.gaussian-figure svg{min-width:0}}