:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;color:#1d2431;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#f5f6f8;font-family:Avenir Next,Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed}.batch-lesson{--lesson-ink:#1d2431;--lesson-muted:#626c7c;--lesson-blue:#315bdb;--lesson-line:#dde1e7;--lesson-surface:#f5f6f8;--lesson-radius:8px;background:var(--lesson-surface);letter-spacing:0;min-height:100vh;font-size:16px;line-height:1.65}.batch-lesson ::selection{color:#172448;background:#d7e1ff}.batch-lesson :focus-visible{outline-offset:4px;outline:3px solid #7196fa}.batch-lesson button{letter-spacing:0}.batch-lesson button,.batch-lesson summary,.batch-lesson a{touch-action:manipulation}.batch-lesson a{color:inherit;text-decoration:none}.batch-lesson p,.batch-lesson h1,.batch-lesson h2{margin:0}.lesson-nav{align-items:center;gap:26px;max-width:1280px;height:76px;margin:auto;padding:20px 44px;display:flex}.lesson-brand{align-items:center;gap:8px;font-family:Avenir Next,system-ui,sans-serif;font-size:27px;font-weight:750;line-height:1;display:inline-flex}.lesson-brand-dot{color:var(--lesson-blue);margin-left:-8px}.lesson-brand-icon{width:31px;height:31px;color:var(--lesson-blue);place-items:center;display:grid}.lesson-course-name{color:var(--lesson-muted);font-size:13px}.lesson-nav>button{margin-left:auto}.lesson-text-button{color:#596374;background:0 0;border:0;justify-content:center;align-items:center;gap:8px;min-height:40px;padding:9px 0;font-size:14px;display:inline-flex}.lesson-text-button:hover{color:var(--lesson-blue)}.lesson-stage{max-width:1192px;margin:0 auto;padding:4px 24px 0}.lesson-chapters{justify-content:center;gap:0;max-width:660px;margin:6px auto 24px;display:flex}.lesson-chapters>div{color:#79818e;white-space:nowrap;border-bottom:1px solid #dfe3e9;flex:1;justify-content:center;align-items:center;gap:10px;padding:9px 10px;font-size:13px;display:flex}.lesson-chapters>div>span:first-child{font-variant-numeric:tabular-nums;place-items:center;width:19px;height:19px;font-size:11px;display:grid}.lesson-chapters>div[data-active=true]{color:var(--lesson-blue);border-bottom:2px solid var(--lesson-blue);font-weight:650}.lesson-chapters>div[data-past=true]{color:#485c72}.lesson-heading{text-align:center;min-height:92px}.lesson-heading h1{text-wrap:balance;font-size:32px;font-weight:650;line-height:1.45}.lesson-heading p{color:var(--lesson-muted);margin-top:12px;font-size:16px}.lesson-exhibit{margin-top:3px;position:relative}.lesson-exhibit-bar{min-height:34px;color:var(--lesson-muted);justify-content:space-between;align-items:center;padding:0 15px;font-size:12px;display:flex}.lesson-identity{color:#3757ae;align-items:center;gap:8px;font-size:13px;display:inline-flex}.lesson-identity i{background:#3861e9;border-radius:2px;width:14px;height:9px;display:inline-block}.lesson-running-label{text-align:right;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:4px 18px;display:flex}.lesson-identity,.lesson-clock{flex-shrink:0}.lesson-clock{color:#2d374a;font-variant-numeric:tabular-nums}.lesson-clock small{color:#747d8a;font-size:11px}.lesson-model{height:280px;position:relative}.lesson-canvas{position:absolute;inset:0}.lesson-canvas canvas{width:100%;height:100%;display:block}.lesson-zone-labels{color:#6a7585;text-align:center;pointer-events:none;font-size:13px;position:absolute;inset:0}.lesson-zone-labels>span{white-space:nowrap;position:absolute;top:0;left:0}.lesson-zone-labels span[data-active=true]{color:var(--lesson-blue);font-weight:650}.lesson-scene-caption{color:#687282;justify-content:center;align-items:center;gap:10px;min-height:42px;padding:4px 12px;font-size:14px;display:flex}.lesson-scene-caption>span:not(.lesson-mini-ticket){overflow-wrap:anywhere}.lesson-mini-ticket{width:25px;height:22px;color:var(--lesson-blue);background:#edf1ff;border:1px solid #c9d4fa;border-radius:4px;flex-shrink:0;place-items:center;font-size:12px;font-weight:650;display:inline-grid}.lesson-caption-stat{border-right:1px solid var(--lesson-line);gap:9px;padding:0 14px;font-size:13px;display:inline-flex}.lesson-caption-stat:last-child{border:0}.lesson-caption-stat b{color:#273445;font-variant-numeric:tabular-nums;font-weight:650}.lesson-action-area{flex-direction:column;justify-content:flex-start;align-items:center;min-height:90px;padding:17px 0 27px;display:flex}.lesson-action-row,.lesson-choice-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:22px;display:flex}.lesson-choice-row{gap:14px}.lesson-primary,.lesson-secondary{border-radius:var(--lesson-radius);justify-content:center;align-items:center;gap:14px;min-height:46px;padding:11px 22px;font-size:14px;font-weight:600;line-height:1.45;transition:background .15s,color .15s,transform .15s;display:inline-flex}.lesson-primary svg,.lesson-secondary svg,.lesson-text-button svg{flex-shrink:0}.lesson-primary{color:#fff;background:#26334b;border:1px solid #0000}.lesson-primary:hover{background:#354c75}.lesson-secondary{color:#33405a;background:#fff;border:1px solid #cbd1dc}.lesson-secondary:hover{background:#edf1f8;border-color:#a6b5d1}.lesson-primary:active,.lesson-secondary:active{transform:translateY(1px)}.lesson-primary:disabled{color:#87909e;background:#e2e5ec}.lesson-icon-button{color:#435371;background:#fff;border:1px solid #d7dde6;border-radius:6px;flex-shrink:0;place-items:center;width:38px;height:38px;display:inline-grid}.lesson-icon-button:hover{background:#e9eef8}.lesson-input{flex-direction:column;gap:8px;width:min(100%,520px);margin-bottom:19px;display:flex}.lesson-input label{color:#576579;font-size:13px}.lesson-input input{color:#273445;caret-color:#315bdb;background:#fff;border:1px solid #c7cfdb;border-radius:8px;width:100%;min-width:0;padding:12px 15px;font-size:16px}.lesson-input>span{color:#687588;font-size:12px}.lesson-playback{align-items:center;gap:16px;width:min(100%,420px);display:flex}.lesson-progress{background:#dde3ec;flex:1;height:3px;overflow:hidden}.lesson-progress i{transform-origin:0;background:#4163ca;width:100%;height:100%;display:block}.lesson-results{border-top:1px solid var(--lesson-line);max-width:920px;margin:8px auto 40px;padding:26px 24px 0;animation:.35s ease-out lesson-reveal}.lesson-section-heading{justify-content:space-between;align-items:center;gap:18px;margin-bottom:20px;display:flex}.lesson-section-heading h2{font-size:21px;font-weight:650}.lesson-section-heading>span{color:#78818d;font-size:12px}.lesson-table-row{border-bottom:1px solid #e0e4e9;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:24px;min-height:87px;display:grid}.lesson-table-head{color:#707b8b;min-height:38px;font-size:13px}.lesson-table-row>strong{font-size:14px;font-weight:600}.lesson-table-row>div{padding:7px 0 15px;position:relative}.lesson-table-row b{color:#2d477c;font-variant-numeric:tabular-nums;font-size:24px;font-weight:550}.lesson-table-row small{color:#738096;margin-left:7px;font-size:11px}.lesson-result-bar{background:#5479de;border-radius:2px;height:3px;display:block;position:absolute;bottom:7px}.lesson-result-bar[data-total]{background:#c29d40}.lesson-takeaway{color:#364d4b;align-items:flex-start;gap:12px;margin:26px 0;font-size:15px;line-height:1.8;display:flex}.lesson-takeaway-icon{color:#247b5e;background:#e4eee8;border-radius:50%;flex-shrink:0;place-items:center;width:30px;height:30px;display:grid}.lesson-next-experiment{color:#747e8c;flex-direction:column;gap:16px;margin-top:32px;font-size:13px;display:flex}.lesson-next-experiment>div{flex-wrap:wrap;gap:12px;display:flex}.lesson-notes{border-top:1px solid var(--lesson-line);max-width:920px;margin:0 auto;padding:26px 24px 38px}.lesson-notes-heading{color:#7b8390;justify-content:space-between;align-items:center;margin-bottom:17px;font-size:13px;display:flex}.lesson-notes details{border-bottom:1px solid #e1e5eb}.lesson-notes summary{cursor:pointer;color:#414d60;justify-content:space-between;align-items:center;gap:14px;padding:18px 0;font-size:15px;list-style:none;display:flex}.lesson-notes summary::-webkit-details-marker{display:none}.lesson-notes summary svg{color:#7c899b;flex-shrink:0;transition:transform .2s}.lesson-notes details[open] summary svg{transform:rotate(180deg)}.lesson-notes details p{color:#646f7f;max-width:72ch;margin:0 0 16px;font-size:15px;line-height:1.9}.lesson-notes details a{color:#315bdb;text-underline-offset:4px;align-items:center;gap:5px;margin-bottom:22px;font-size:14px;text-decoration:underline;display:inline-flex}.lesson-footer{color:#7b8491;justify-content:space-between;gap:20px;max-width:1192px;margin:auto;padding:16px 24px 28px;font-size:12px;display:flex}.lesson-footer>span>span{margin-left:14px}.lesson-scene-loading{color:#7b8ca9;flex-direction:column;justify-content:center;align-items:center;gap:16px;height:280px;font-size:14px;display:flex}.lesson-flat{justify-content:space-around;align-items:stretch;gap:15px;height:290px;padding:45px 15px;display:flex}.lesson-flat>div{background:#eef1f5;border-bottom:2px solid #cbd4e4;flex:1;padding:12px}.lesson-flat strong{font-size:14px;font-weight:500}.lesson-flat>div>div{flex-wrap:wrap;gap:6px;margin-top:20px;display:flex}.lesson-flat span{background:#eac668;border-radius:4px;place-items:center;width:39px;height:33px;display:grid}.lesson-flat span[data-mine=true]{color:#fff;background:#3861e9}.lesson-dialog::backdrop{background:#15203666}.lesson-dialog{color:#26334a;background:#fff;border:0;border-radius:8px;width:calc(100% - 40px);max-width:480px;max-height:calc(100dvh - 40px);margin:auto;padding:40px;position:fixed;box-shadow:0 20px 80px #10274522}.lesson-dialog-close{border:0;position:absolute;top:16px;right:16px}.lesson-dialog h2{margin:20px 0 14px;font-size:24px}.lesson-dialog p{color:#677488;margin:14px 0;font-size:15px;line-height:1.85}.lesson-dialog .lesson-primary{margin-top:12px}@keyframes lesson-reveal{0%{opacity:0;transform:translateY(7px)}to{opacity:1;transform:translateY(0)}}@media (width>=1500px){.lesson-model{height:390px}.lesson-stage{padding-top:18px}.lesson-chapters{margin-bottom:44px}}@media (width<=650px){.lesson-nav{gap:10px;height:66px;padding:14px 20px}.lesson-brand{font-size:24px}.lesson-course-name{display:none}.lesson-nav .lesson-text-button{font-size:12px}.lesson-stage{padding:0 18px}.lesson-chapters{margin:5px 0 22px}.lesson-chapters>div{gap:5px;padding:9px 2px;font-size:12px}.lesson-chapters>div>span:first-child{width:15px;font-size:10px}.lesson-heading{min-height:105px;padding:0 5px}.lesson-heading h1{max-width:310px;margin:auto;font-size:25px;line-height:1.3}.lesson-heading p{text-wrap:pretty;margin-top:10px;font-size:15px;line-height:1.6}.lesson-exhibit-bar{gap:8px;min-height:35px;padding:0}.lesson-exhibit-note{font-size:11px}.lesson-identity{font-size:12px}.lesson-running-label{gap:2px 9px;font-size:11px}.lesson-model{height:290px}.lesson-canvas{inset:0}.lesson-zone-labels{font-size:12px}.lesson-scene-caption{min-height:55px;padding:8px 0;font-size:12px}.lesson-scene-caption>span:not(.lesson-mini-ticket){max-width:280px}.lesson-caption-stat{padding:0 11px;font-size:12px}.lesson-action-area{min-height:83px;padding-top:13px}.lesson-primary,.lesson-secondary{gap:10px;min-height:46px;padding:12px 17px;font-size:13px}.lesson-choice-row{flex-wrap:nowrap;gap:10px;width:100%}.lesson-choice-row button{flex:1}.lesson-results{margin-top:0;padding:24px 20px 0}.lesson-section-heading{flex-wrap:wrap;align-items:baseline;gap:6px 10px}.lesson-section-heading h2{font-size:18px}.lesson-section-heading>span{white-space:nowrap;font-size:12px}.lesson-table-row{grid-template-columns:.85fr 1fr 1fr;gap:12px}.lesson-table-head,.lesson-table-row>strong{font-size:12px}.lesson-table-row b{font-size:23px}.lesson-table-row small{margin:0;font-size:12px;display:block}.lesson-takeaway{font-size:14px}.lesson-next-experiment>div{flex-direction:column}.lesson-notes{padding:24px 22px 30px}.lesson-notes summary{padding:17px 0;font-size:14px}.lesson-notes details p{font-size:14px}.lesson-footer{flex-direction:column;gap:4px;padding:10px 22px 25px;font-size:11px}.lesson-scene-loading{height:290px}.lesson-dialog{padding:30px 24px}.lesson-dialog h2{font-size:22px}}@media (prefers-reduced-motion:reduce){.batch-lesson *,.batch-lesson :before,.batch-lesson :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.fast-lab{--lesson-radius:8px;--lab-ink:#252c36;--lab-muted:#69727d;--lab-line:#dce1e7;--lab-blue:#345edb;--lab-green:#23735c;--lab-paper:#f5f6f8;--course-accent:#345edb;--course-tint:#eaf0fd;background:var(--lab-paper);min-height:100vh;color:var(--lab-ink);letter-spacing:0;font-size:15px;line-height:1.6}.fast-lab button,.fast-lab a,.fast-lab summary{touch-action:manipulation}.fast-lab button{font:inherit}.fast-lab :focus-visible{outline-offset:4px;outline:3px solid #7196fa}.fast-lab .platform-main:focus{outline:none}.fast-lab a{color:inherit;text-decoration:none}.fast-lab h1,.fast-lab h2,.fast-lab h3,.fast-lab p{margin:0}.fast-lab svg{flex-shrink:0}.fast-lab button:disabled{opacity:.45;cursor:not-allowed}.lab-skip{z-index:20;background:#fff;padding:12px;position:fixed;top:-80px;left:16px}.lab-skip:focus{top:12px}.platform-header{border-bottom:1px solid var(--lab-line);background:#fff;align-items:center;gap:28px;height:72px;padding:0 32px;display:flex}.platform-brand{align-items:center;gap:4px;font-size:25px;font-weight:700;line-height:1;display:inline-flex}.platform-brand>span:first-child{color:var(--course-accent);width:33px;transition:color .22s;display:flex}.platform-brand-light{font-weight:450}.platform-brand i{background:#caa544;border-radius:50%;align-self:flex-end;width:5px;height:5px;margin:0 0 2px 1px}.platform-series{color:var(--lab-muted);border-left:1px solid var(--lab-line);padding-left:28px;font-size:13px}.platform-header>button{margin-left:auto;font-size:13px}.platform-layout{grid-template-columns:240px minmax(0,1fr);max-width:1600px;margin:auto;display:grid}.platform-syllabus{border-right:1px solid var(--lab-line);background:#fbfcfd;padding:32px 18px 30px}.platform-season{margin-bottom:26px;padding:0 14px}.platform-season>span{color:#7e8793;font-size:10px;font-weight:650}.platform-season h2{margin-top:7px;font-size:17px;font-weight:650;line-height:1.45}.platform-season p{color:var(--lab-muted);margin-top:5px;font-size:12px}.platform-syllabus nav{flex-direction:column;gap:5px;display:flex}.platform-syllabus nav a{border-radius:6px;align-items:center;gap:12px;padding:13px 11px;display:flex;position:relative}.platform-syllabus nav a:hover{background:#eef1f5}.platform-syllabus nav a[aria-current]{background:var(--course-tint)}.platform-course-number{color:#7b8592;font-variant-numeric:tabular-nums;flex-shrink:0;align-self:flex-start;width:22px;padding-top:2px;font-size:11px}.platform-course-number svg{color:var(--lab-green)}.platform-syllabus nav strong{font-size:13px;font-weight:600;line-height:1.45;display:block}.platform-syllabus nav small{color:var(--lab-muted);margin-top:3px;font-size:11px;display:block}.platform-syllabus nav a[aria-current] strong,.platform-syllabus nav a[aria-current] .platform-course-number{color:var(--course-accent)}.platform-syllabus nav i{background:var(--course-accent);border-radius:50%;width:5px;height:5px;position:absolute;right:9px}.platform-progress{border-top:1px solid var(--lab-line);margin:28px 14px 0;padding-top:22px}.platform-progress>div:first-child{color:#6b7583;justify-content:space-between;gap:8px;font-size:11px;display:flex}.platform-progress-track{background:#e0e5ea;height:3px;margin:9px 0}.platform-progress-track i{background:var(--course-accent);transform-origin:0;height:100%;transition:transform .25s,background-color .22s;display:block}.platform-progress>small{color:#79818d;font-size:10px;display:block}.platform-progress>button{min-height:32px;font-size:11px}.platform-reset p{margin:9px 0;font-size:12px}.platform-reset button{min-height:32px;margin-right:8px;padding:5px 12px;font-size:12px}.platform-boundary{color:#7e8895;gap:9px;margin:34px 14px 0;font-size:10px;line-height:1.7;display:flex}.platform-mobile-menu{display:none}.platform-main{min-width:0;padding:0 36px 34px}.platform-breadcrumb{color:#75808e;align-items:center;gap:11px;min-height:64px;font-size:11px;display:flex}.platform-type{color:#828a95;margin-left:auto;font-size:10px}.platform-main .batch-lesson{min-height:0}.platform-main .lesson-stage{padding-left:0;padding-right:0}.platform-main .lesson-model{height:260px}.platform-main .lesson-chapters{margin-top:0;margin-bottom:22px}.platform-main .lesson-heading h1{font-size:29px}.platform-main .lesson-heading p{font-size:15px}.platform-main .lesson-results,.platform-main .lesson-notes{padding-left:0;padding-right:0}.platform-main .lesson-notes{padding-bottom:15px}.interactive-lesson{max-width:1100px;margin:auto}.lab-heading h1{text-wrap:balance;font-size:30px;font-weight:650;line-height:1.35}.lab-heading p{color:var(--lab-muted);max-width:70ch;margin-top:10px;font-size:15px}.lab-condition{justify-content:space-between;align-items:center;gap:16px;margin:26px 0 22px;display:flex}.lab-condition>span{color:#6a7481;font-size:12px}.lab-segmented{background:#e9edf2;border:1px solid #d4dbe4;border-radius:7px;gap:3px;padding:3px;display:flex}.lab-segmented button{color:#687383;background:0 0;border:1px solid #0000;border-radius:4px;min-height:34px;padding:7px 13px;font-size:12px;line-height:1.4}.lab-segmented button[aria-pressed=true]{color:#284879;background:#fff;border-color:#d4dce7;box-shadow:0 1px 3px #1a2d4410}.lab-story{gap:14px;min-height:100px;padding:21px 0 19px;animation:.32s cubic-bezier(.22,1,.36,1) lab-phase-in;display:flex}.lab-story-index{color:var(--course-accent);font-variant-numeric:tabular-nums;padding-top:2px;font-size:12px}.lab-story h2{font-size:18px;font-weight:600;line-height:1.4}.lab-story p{color:var(--lab-muted);max-width:72ch;margin-top:5px;font-size:13px}.lab-visual{min-height:325px;padding:9px 0 22px}.platform-main:has([data-spatial=true]) .platform-breadcrumb{min-height:44px}[data-spatial=true] .lab-condition{margin-top:16px;margin-bottom:12px}[data-spatial=true] .lab-playback{padding-top:12px}[data-spatial=true] .lab-model-label{padding-top:6px;padding-bottom:8px}[data-spatial=true] .lab-story{min-height:0;padding-top:14px;padding-bottom:10px}[data-spatial=true] .lab-visual{padding-top:0}.lab-exhibit-toolbar{justify-content:space-between;align-items:center;gap:12px;min-height:34px;margin:0 0 8px;display:flex}.lab-exhibit-toolbar .lesson-icon-button{width:34px;height:34px}.lab-exhibit-toolbar .lesson-icon-button[aria-pressed=true]{color:#345edb;background:#e7edfa;border-color:#b7c7e6}.lab-exhibit-key{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.lab-exhibit-key>span{color:#788491;align-items:center;gap:6px;font-size:10px;display:inline-flex}.lab-exhibit-key i{background:#e5b94e;border-radius:2px;width:8px;height:8px}.lab-exhibit-key i[data-request=A],.lab-exhibit-key i[data-color=blue]{background:#426be0}.lab-exhibit-key i[data-request=C]{background:#9b83ca}.lab-exhibit-key i[data-color=green]{background:#4caa87}.lab-exhibit-key i[data-color=amber]{background:#e5b94e}.lab-exhibit-key i[data-color=violet]{background:#8c76c5}.lab-exhibit-key i[data-color=coral]{background:#d97868}.process-exhibit,.process-exhibit-loading{width:100%;height:224px;position:relative}.process-exhibit-loading{color:#8995a5;place-items:center;font-size:12px;display:grid}.process-exhibit-canvas{position:absolute;inset:0 0 28px}.process-exhibit-canvas canvas{width:100%;height:100%;display:block}.process-exhibit-labels{pointer-events:none;height:24px;position:absolute;inset:auto 0 0}.process-exhibit-labels>span{color:#657287;white-space:nowrap;font-size:11px;font-weight:550;line-height:1.4;position:absolute;top:0;left:0;transform:translate(-50%)}.process-exhibit-fallback{background:#edf1f5;border-radius:6px;height:100%;padding:15px;font-size:12px;overflow:auto}.process-exhibit-fallback ul{margin:9px 0 0;padding-left:17px}.lab-visually-hidden{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.lab-exhibit-pair .lab-lane header{margin-bottom:0}.lab-input-language{margin-top:12px}.lab-input-sentence{color:#303d50;min-height:60px;margin:0 0 12px;font-size:16px;line-height:1.5}.lab-input-tokens{opacity:1;flex-wrap:wrap;align-content:flex-start;gap:5px;min-height:92px;transition:opacity .18s;display:flex}[data-input-split=false] .lab-input-tokens{opacity:.22}.lab-input-tokens>span{color:#365783;background:#e5ecf8;border-radius:5px;padding:4px 7px;font-size:12px;line-height:18px;transition:background .14s,color .14s}.lab-input-tokens>[data-token-state=current]{color:#594719;background:#f5d977}.lab-input-tokens>[data-token-state=read]{color:#28674e;background:#d7eee3}.lab-input-progress{color:#748092;justify-content:space-between;gap:8px;margin-top:8px;font-size:11px;display:flex}.lab-input-caveat{color:#748092;grid-column:1/-1;margin:0;font-size:12px;line-height:1.6}.lab-language-prompt{color:#34445b;margin:12px 0;font-size:16px}.lab-language-label{color:#748092;margin-bottom:8px;font-size:11px;display:block}.lab-language-output{color:#748092;overflow-wrap:anywhere;min-height:48px;font-size:14px;line-height:1.9}.lab-language-output>span{color:#355b93;-webkit-box-decoration-break:clone;box-decoration-break:clone;background:#e6edf9;border-radius:3px}.lab-language-output>span[data-delivered=true]{color:#28674e;background:#d7eee3}.lab-server-language{border-top:1px solid var(--lab-line);margin-top:14px;padding-top:14px}.lab-request-language>div{border-top:1px solid var(--lab-line);grid-template-columns:20px minmax(0,1fr);gap:10px;padding:10px 0;display:grid}.lab-request-language>div>b{color:#426be0;font-size:13px}.lab-request-language>div[data-request=B]>b{color:#9a771d}.lab-request-language>div[data-request=C]>b{color:#8065ad}.lab-request-language p{margin:0;font-size:14px}.lab-request-language .lab-language-output{min-height:27px;font-size:12px}.lab-cache-language{margin-top:12px}.lab-cache-language p{min-height:44px;font-size:14px;line-height:1.6}.lab-cache-language .lab-input-tokens{min-height:80px}.lab-input-tokens>[data-token-state=computed]{color:#294e82;background:#bcd1f3}.lab-draft-language{margin:16px 0}.lab-draft-language .lab-input-tokens{min-height:32px}.lab-input-tokens>[data-token-state=rejected]{color:#9b4e41;background:#f3ded9;text-decoration:line-through}@media (prefers-reduced-motion:reduce){.lab-input-tokens,.lab-input-tokens>span{transition:none}}.lab-exhibit-status{color:#5d6e81;min-height:42px;font-size:12px;line-height:1.7;margin-top:5px!important}.lab-exhibit-detail{margin-top:15px}.lab-exhibit-detail summary{color:#8390a0;cursor:pointer;justify-content:space-between;align-items:center;gap:10px;padding:7px 0;font-size:11px;list-style:none;display:flex}.lab-exhibit-detail summary::-webkit-details-marker{display:none}.lab-exhibit-detail[open] summary svg{transform:rotate(180deg)}.lab-exhibit-detail .lab-step-grid{margin-top:5px}.lab-exhibit-pair .lab-reader{min-height:93px;margin-top:13px}.lab-exhibit-pair .lab-reader .lab-answer{min-height:64px}.lab-single-exhibit{max-width:870px;margin:auto}.lab-single-exhibit .process-exhibit{height:250px}.lab-spec-output{border-top:1px solid var(--lab-line);border-bottom:1px solid var(--lab-line);grid-template-columns:110px minmax(0,1fr);align-items:start;column-gap:18px;padding:14px 0 10px;display:grid}.lab-spec-output>span{color:#7c8795;padding-top:13px;font-size:10px}.lab-spec-output .lab-answer{min-height:52px;padding:7px 0}.lab-spec-output .lab-correction{grid-column:2;padding-left:0}.lab-spec-detail{margin-top:9px}.lab-candidate-list{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;padding:7px 0 8px;display:grid}.lab-candidate-list>div{color:#6e5921;background:#f3ebd6;border-radius:5px;grid-template-columns:minmax(0,1fr) auto;gap:2px 8px;min-width:0;padding:9px 10px;display:grid}.lab-candidate-list span{overflow-wrap:anywhere}.lab-candidate-list small{color:#8b7950;grid-column:1;font-size:9px}.lab-candidate-list svg{grid-area:1/2/span 2;align-self:center}.lab-candidate-list>div[data-state=accepted]{color:#287153;background:#e3f0e8}.lab-candidate-list>div[data-state=rejected]{color:#a0544b;background:#f6e5e2}.lab-configuration{max-width:870px;margin:auto}.lab-configuration>.process-exhibit{height:250px}.lab-fast-summary{text-align:center;min-height:0}.lab-fast-change{border-top:1px solid var(--lab-line);border-bottom:1px solid var(--lab-line);grid-template-columns:110px minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:14px;padding:15px 0;display:grid}.lab-fast-change>span{color:#7d8794;font-size:10px}.lab-fast-change>strong{color:#53647a;font-size:14px;font-weight:550}.lab-fast-change[data-revealed=true]>strong:last-child{color:var(--course-accent)}.lab-config-detail{margin-top:12px}.lab-config-detail .lab-config-header{padding-top:7px}.lab-pair{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0;display:grid}.lab-lane{min-width:0;padding:0 24px 0 0}.lab-lane+.lab-lane{border-left:1px solid var(--lab-line);padding:0 0 0 24px}.lab-lane header{min-height:49px;margin-bottom:18px}.lab-lane header>span{color:#7b8591;font-size:10px}.lab-lane h3{margin-top:2px;font-size:16px;font-weight:600;line-height:1.4}.lab-lane[data-accent=true] h3{color:#35645b}.lab-diagram-label{color:#6c7786;align-items:center;gap:7px;margin-bottom:10px;font-size:11px;display:flex}.lab-diagram-label>span:last-child:not(:first-child){text-align:right;margin-left:auto;font-size:10px}.lab-context-blocks{gap:8px;height:79px;display:grid}.lab-context-block{background:#eef0f3;border:1px solid #dce1e8;border-radius:5px;padding:10px;position:relative;overflow:hidden}.lab-context-block>span{color:#7c8898;margin-bottom:6px;font-size:10px;line-height:1.2;display:block}.lab-context-block i{background:#d1d8e1;width:85%;height:3px;margin-top:5px;display:block}.lab-context-block i:last-of-type{width:50%}.lab-context-block[data-state=active]{background:#edf2ff;border-color:#839ce0}.lab-context-block[data-state=done]{background:#e6eeea;border-color:#b7cebf}.lab-context-block[data-state=done] i{background:#b4c9be}.lab-context-block>svg{color:#36785f;position:absolute;top:8px;right:7px}.lab-flow-divider{color:#788498;align-items:center;gap:10px;min-height:49px;font-size:11px;display:flex}.lab-answer{color:#2c486d;overflow-wrap:anywhere;min-height:79px;padding:13px 0;font-size:16px;line-height:1.9}.lab-empty-answer{color:#98a0aa;font-size:13px}.lab-piece{animation:.28s cubic-bezier(.22,1,.36,1) lab-piece-in}.lab-piece[data-latest=true]{background:#e4ebfb;border-radius:2px}.lab-lane-result{border-top:1px solid #e0e5eb;justify-content:space-between;gap:12px;margin-top:11px;padding-top:12px;display:flex}.lab-lane-result>span{color:#7a8390;font-size:10px}.lab-lane-result b{color:#39495e;font-variant-numeric:tabular-nums;margin-top:2px;font-size:13px;font-weight:550;display:block}.lab-waiting-line{color:#7d8795;align-items:center;gap:12px;min-height:37px;margin-bottom:10px;font-size:11px;display:flex}.lab-waiting-line small{font-size:11px}.lab-request{color:#4c421f;background:#e8c568;border-radius:4px;justify-content:center;align-items:center;width:36px;height:27px;font-size:12px;font-weight:600;display:inline-flex}.lab-request[data-request=A]{color:#fff;background:#416bd9}.lab-request[data-request=C]{color:#5a477a;background:#d4c6e8}.lab-slots{grid-template-columns:1fr 1fr;gap:10px;display:grid}.lab-slot{border:1px dashed #cbd4df;border-radius:6px;flex-direction:column;gap:9px;min-height:88px;padding:10px 12px;display:flex}.lab-slot>span:first-child{color:#7d8795;font-size:10px}.lab-slot[data-filled=true]{background:#edf1f7;border-style:solid}.lab-slot .lab-request{justify-content:flex-start;width:100%;padding:0 10px;animation:.2s ease-out lab-piece-in}.lab-request small{margin-left:auto;font-size:10px;font-weight:450}.lab-free{color:#929aa5;font-size:12px}.lab-step-grid{margin-top:16px}.lab-step-head,.lab-step-row{grid-template-columns:30px repeat(7,minmax(0,1fr));align-items:center;gap:4px;display:grid}.lab-step-head{color:#8b939f;text-align:center;margin-bottom:5px;font-size:9px}.lab-step-head>span:first-child{text-align:left}.lab-step-row{margin-top:4px}.lab-step-row>b{color:#7d8795;font-size:10px;font-weight:500}.lab-step-row>span{color:#355495;background:#e9edf1;border-radius:2px;place-items:center;height:17px;display:grid}.lab-step-row>span[data-work=true][data-request=A]{background:#c8d6f7}.lab-step-row>span[data-work=true][data-request=B]{color:#796227;background:#efdfb1}.lab-step-row>span[data-work=true][data-request=C]{color:#766092;background:#ddd2ee}.lab-step-row>span[data-now=true]{outline-offset:1px;outline:1px solid #657b9f}.lab-cache-blocks{grid-template-columns:repeat(4,1fr);gap:7px;display:grid}.lab-cache-blocks>div{color:#a0aaba;background:#edf0f5;border:1px solid #dce2e9;border-radius:5px;justify-content:center;align-items:center;gap:5px;height:57px;display:flex}.lab-cache-blocks>div>span{font-size:10px}.lab-cache-blocks>div[data-new=true]{border-style:dashed}.lab-cache-blocks>div[data-state=reused]{color:#29715a;background:#e0eee6;border-color:#b6cfbf}.lab-cache-blocks>div[data-state=done]{color:#4566b6;background:#e1e9fb;border-color:#bccbeb}.lab-speculation{max-width:800px;margin:auto}.lab-spec-stage>header{align-items:baseline;gap:12px;margin-bottom:12px;display:flex}.lab-stage-number{color:#a1843b;font-size:11px}.lab-spec-stage h3{font-size:15px;font-weight:600}.lab-spec-stage header p{color:#7e8795;margin-top:2px;font-size:11px}.lab-candidates{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.lab-candidate{background:#f6efdc;border:1px dashed #ccb575;border-radius:5px;min-height:80px;padding:12px;position:relative}.lab-candidate>span{color:#6e5921;font-size:18px;display:block}.lab-candidate small{color:#938357;margin-top:5px;font-size:10px;display:block}.lab-candidate>svg{position:absolute;bottom:11px;right:9px}.lab-candidate[data-state=accepted]{color:#327454;background:#e6eee8;border:1px solid #b3cbbb}.lab-candidate[data-state=accepted] span,.lab-candidate[data-state=accepted] small{color:#327454}.lab-candidate[data-state=rejected]{color:#a06060;background:#f2e7e7;border-color:#d8bebe}.lab-candidate[data-state=rejected] span{color:#a27373;text-decoration:line-through}.lab-candidate[data-state=rejected] small{color:#a27373}.lab-verify-link{color:#9ba5b5;justify-content:space-between;align-items:center;min-height:63px;display:flex}.lab-verify-link>span{color:#6e7e95;align-items:center;gap:10px;font-size:12px;display:flex}.lab-verify-link[data-active=true]>span{color:#315bdb}.lab-verify-link[data-active=true]{background:linear-gradient(90deg,#0000,#e4ebfa,#0000)}.lab-spec-stage .lab-answer{min-height:52px;padding:8px 0 8px 24px}.lab-correction{color:#52816b;align-items:center;gap:7px;padding-left:24px;font-size:12px;display:flex}.lab-visual-footnote{color:#8b94a1;padding-top:16px;font-size:11px;line-height:1.7}.lab-generation-track{grid-template-columns:repeat(5,1fr);gap:6px;display:grid}.lab-generation-track i{color:#fff;background:#e0e5ec;border-radius:3px;place-items:center;height:18px;display:grid}.lab-generation-track i[data-ready=true]{background:#7994c9}.lab-reader{border-left:2px solid #cfd9e8;min-height:122px;padding:5px 0 0 15px}.lab-reader-title{color:#75869a;font-size:10px}.lab-reader .lab-answer{min-height:90px}.lab-configuration{padding-top:10px}.lab-config-header,.lab-config-row{grid-template-columns:.75fr 1fr 1.1fr;align-items:center;gap:20px;display:grid}.lab-config-header{color:#84909e;border-bottom:1px solid var(--lab-line);padding-bottom:10px;font-size:10px}.lab-config-row{border-bottom:1px solid #e2e6ec;min-height:63px;font-size:14px}.lab-config-row strong{color:#798594;font-size:12px;font-weight:500}.lab-config-row>span:last-child{align-items:center;gap:9px;display:flex}.lab-config-row[data-changed=true]>span:last-child{color:#257357;font-weight:600}.lab-tradeoff{grid-template-columns:1fr 1fr;gap:28px;padding:20px 0 0;display:grid}.lab-tradeoff span{color:#89939f;font-size:10px;display:block}.lab-tradeoff strong{color:#8792a1;margin-top:5px;font-size:14px;font-weight:500;display:block}.lab-tradeoff[data-revealed=true] strong{color:#41536b}.lab-playback{border-top:1px solid var(--lab-line);align-items:center;gap:12px;padding:19px 0 0;display:flex}.lab-playback>.lesson-primary{min-width:166px;padding:10px 16px;font-size:13px}.lab-playback>.lesson-icon-button{width:36px;height:36px}.lab-clock{flex:1;min-width:70px;margin:0 16px}.lab-clock>div{background:#dce2ea;height:3px}.lab-clock i{transform-origin:0;background:#6080c8;height:100%;display:block}.lab-clock>span{color:#8a93a1;margin-top:7px;font-size:10px;display:block}.lab-model-label{color:#8e96a2;text-align:right;border-bottom:1px solid var(--lab-line);padding:8px 0 13px;font-size:10px}.lab-takeaway{border-top:1px solid #cbded3;border-bottom:1px solid #cbded3;align-items:baseline;gap:22px;margin:25px 0 0;padding:21px 0;animation:.25s ease-out lab-piece-in;display:flex}.lab-takeaway>span{color:#428267;white-space:nowrap;font-size:11px}.lab-takeaway p{color:#385e51;font-size:15px}.lab-depth{padding:30px 0 0}.lab-depth>h2{color:#818b98;margin-bottom:10px;font-size:12px;font-weight:500}.lab-depth details{border-bottom:1px solid var(--lab-line)}.lab-depth summary{cursor:pointer;color:#4d5d73;justify-content:space-between;align-items:center;gap:12px;padding:17px 0;font-size:14px;list-style:none;display:flex}.lab-depth summary::-webkit-details-marker{display:none}.lab-depth summary>svg{color:#919dad;transition:transform .16s}.lab-depth details[open] summary>svg{transform:rotate(180deg)}.lab-depth details>p{color:#6b7788;max-width:75ch;padding-bottom:20px;font-size:14px;line-height:1.9}.lab-depth a{color:#4163b3;text-underline-offset:4px;align-items:center;gap:7px;margin-bottom:20px;font-size:13px;text-decoration:underline;display:flex}.lab-checkpoint{border-top:1px solid var(--lab-line);margin-top:32px;padding:24px 0}.lab-section-title{color:#8893a1;justify-content:space-between;align-items:center;gap:12px;font-size:11px;display:flex}.lab-completed{color:var(--lab-green);align-items:center;gap:6px;display:inline-flex}.lab-checkpoint h2{margin:12px 0 19px;font-size:19px;font-weight:550}.lab-check-choices{grid-template-columns:1fr 1fr;gap:12px;display:grid}.lab-check-choices>button{text-align:left;color:#53647a;background:#fff;border:1px solid #d3dbe6;border-radius:6px;align-items:center;gap:12px;padding:14px;font-size:13px;display:flex}.lab-check-choices>button>span{color:#939faf;font-size:11px}.lab-check-choices>button:hover{border-color:#9caecd}.lab-check-choices>button[aria-pressed=true]{background:#f7f1e3;border-color:#bba269}.lab-check-choices>button[data-correct=true]{color:#347055;background:#eaf3ed;border-color:#97c0a8}.lab-check-feedback{color:#806c3b;font-size:13px;line-height:1.9;margin-top:18px!important}.lab-check-feedback[data-correct=true]{color:#4b7663}.platform-next{border-top:1px solid var(--lab-line);justify-content:space-between;align-items:center;gap:14px;margin-top:30px;padding-top:22px;display:flex}.platform-next .lesson-secondary{text-align:left;font-size:13px}.platform-next small{color:#8c98a8;font-size:10px;font-weight:400;display:block}.platform-next .lesson-text-button{font-size:12px}.platform-season-complete{color:#3a775e;align-items:center;gap:14px;margin-top:30px;font-size:14px;display:flex}.platform-season-complete p{color:#7c8e81;font-size:12px}.platform-footer{border-top:1px solid var(--lab-line);color:#8b949f;background:#fbfcfd;justify-content:space-between;padding:18px 32px;font-size:10px;display:flex}.platform-about{font-family:inherit}.platform-about h2{margin:18px 0 14px}.platform-about p{margin:14px 0}.platform-about a{color:#3a61b9;font-size:13px;text-decoration:underline}.platform-about .lesson-primary{margin-top:22px;display:flex}@keyframes lab-phase-in{0%{opacity:.25;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes lab-piece-in{0%{opacity:.2;transform:translateY(5px)scale(.985)}to{opacity:1;transform:translateY(0)scale(1)}}@media (width>=1500px){.platform-main{padding-left:54px;padding-right:54px}.platform-main .lesson-model{height:350px}.lab-visual{padding-top:22px;padding-bottom:30px}}@media (width<=1050px){.platform-layout{grid-template-columns:210px minmax(0,1fr)}.platform-main{padding-left:26px;padding-right:26px}.platform-syllabus{padding-left:10px;padding-right:10px}.lab-lane{padding-right:16px}.lab-lane+.lab-lane{padding-left:16px}.lab-condition{flex-direction:column;align-items:flex-start;gap:8px}.lab-clock{margin:0 3px}}@media (width<=760px){.platform-main:has([data-spatial=true]) .platform-breadcrumb{min-height:34px}[data-spatial=true] .lab-heading h1{font-size:24px}[data-spatial=true] .lab-condition{margin-top:15px;margin-bottom:13px}[data-spatial=true] .lab-playback{padding-top:12px}[data-spatial=true] .lab-clock{margin-top:3px}[data-spatial=true] .lab-clock>span{margin-top:4px}[data-spatial=true] .lab-model-label{padding-bottom:8px}[data-spatial=true] .lab-story{min-height:0;padding-top:13px;padding-bottom:13px}[data-spatial=true] .lab-exhibit-toolbar{margin-bottom:8px}.platform-header{gap:12px;height:62px;padding:0 20px}.platform-brand{font-size:23px}.platform-series{display:none}.platform-header>button{font-size:11px}.platform-layout{display:block}.platform-syllabus{border-right:0;border-bottom:1px solid var(--lab-line);padding:0 20px}.platform-season{display:none}.platform-mobile-menu{color:#4d5f78;text-align:left;background:0 0;border:0;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:55px;padding:8px 0;font-size:13px;display:flex}.platform-mobile-menu>span{align-items:center;gap:12px;display:flex}.platform-mobile-menu b{color:#8592a5;font-size:10px;font-weight:500}.platform-mobile-menu[aria-expanded=true]>svg{transform:rotate(180deg)}.platform-syllabus nav,.platform-progress,.platform-boundary{display:none}.platform-syllabus[data-open=true] nav{grid-template-columns:1fr 1fr;gap:5px;padding-bottom:16px;display:grid}.platform-syllabus[data-open=true] .platform-progress{margin:0 0 20px;display:block}.platform-syllabus nav a{gap:7px;padding:10px 7px}.platform-syllabus nav strong{font-size:12px}.platform-syllabus nav small{font-size:10px}.platform-course-number{width:17px;font-size:10px}.platform-syllabus nav i{display:none}.platform-main{padding:0 22px 25px}.platform-breadcrumb{gap:8px;min-height:50px;font-size:10px}.platform-type{font-size:9px}.platform-main .lesson-model{height:290px}.platform-main .lesson-heading h1{font-size:25px}.platform-main .lesson-heading{padding:0}.platform-main .lesson-heading p{font-size:14px}.lab-heading h1{font-size:26px}.lab-heading p{margin-top:9px;font-size:14px;line-height:1.75}.lab-condition{gap:9px;margin-top:22px;margin-bottom:18px}.lab-condition>span{font-size:11px}.lab-segmented{width:100%;max-width:100%}.lab-segmented button{flex:1;padding:8px 9px;font-size:11px}.lab-story{gap:11px;min-height:111px;padding:18px 0}.lab-story h2{font-size:17px}.lab-story p{font-size:12px}.lab-pair{gap:0}.lab-exhibit-pair{grid-template-columns:minmax(0,1fr);gap:24px}.lab-exhibit-pair>.lab-lane{border-left:0;padding:0}.lab-exhibit-pair>.lab-lane+.lab-lane{border-top:1px solid var(--lab-line);padding:22px 0 0}.lab-exhibit-pair .lab-lane header{min-height:0;margin-bottom:0}.lab-exhibit-pair .lab-lane h3{font-size:16px}.lab-exhibit-pair .lab-lane header>span{font-size:10px}.process-exhibit,.process-exhibit-loading{height:208px}.process-exhibit-labels>span{font-size:10px}.lab-exhibit-key{gap:12px}.lab-exhibit-status{min-height:0;font-size:12px}.lab-single-exhibit .process-exhibit,.lab-configuration>.process-exhibit{height:224px}.lab-spec-output{grid-template-columns:1fr;row-gap:3px}.lab-spec-output>span{padding-top:0}.lab-spec-output .lab-correction{grid-column:1}.lab-candidate-list{grid-template-columns:1fr 1fr}.lab-fast-change{grid-template-columns:1fr auto 1fr;gap:8px}.lab-fast-change>span{grid-column:1/-1}.lab-fast-change>strong:last-child{text-align:right}.lab-exhibit-pair .lab-lane-result{margin-top:13px;padding-top:12px}.lab-exhibit-pair .lab-lane-result>span{font-size:10px}.lab-exhibit-pair .lab-lane-result b{font-size:13px}.lab-lane{padding:0 12px 0 0}.lab-lane+.lab-lane{padding:0 0 0 12px}.lab-lane header{min-height:64px;margin-bottom:12px}.lab-lane h3{font-size:14px}.lab-lane header>span{font-size:9px}.lab-diagram-label{flex-wrap:wrap;align-content:start;gap:3px 5px;min-height:36px;font-size:10px}.lab-diagram-label>span:last-child:not(:first-child){text-align:left;flex-basis:100%;margin-left:0;font-size:9px}.lab-diagram-label>svg{display:none}.lab-context-blocks{gap:4px;height:68px}.lab-context-block{padding:6px 4px}.lab-context-block>svg{width:10px;top:5px;right:3px}.lab-flow-divider{gap:5px;min-height:60px;font-size:10px}.lab-answer{min-height:90px;padding:9px 0;font-size:13px;line-height:1.85}.lab-empty-answer{font-size:11px}.lab-lane-result{margin-top:6px;padding-top:10px}.lab-lane-result b{font-size:11px}.lab-lane-result>span{font-size:9px}.lab-waiting-line{gap:6px;min-height:42px;font-size:10px}.lab-waiting-line small{font-size:9px}.lab-slots{gap:6px}.lab-slot{min-height:80px;padding:8px 6px}.lab-slot>span:first-child{font-size:9px}.lab-slot .lab-request{justify-content:center;padding:0}.lab-slot .lab-request small{display:none}.lab-step-head,.lab-step-row{grid-template-columns:20px repeat(7,minmax(0,1fr));gap:3px}.lab-step-head{font-size:8px}.lab-step-row>span{height:14px}.lab-cache-blocks{gap:4px}.lab-cache-blocks>div{flex-direction:column;gap:2px;height:46px}.lab-cache-blocks>div svg{width:12px;height:12px}.lab-cache-blocks>div>span{font-size:8px}.lab-reader{min-height:185px;padding-left:8px}.lab-reader .lab-answer{min-height:153px}.lab-playback{flex-wrap:wrap;gap:8px}.lab-playback>.lesson-primary{flex:1;min-width:0;min-height:42px;font-size:12px}.lab-clock{flex-basis:100%;order:4;margin:9px 0 0}.lab-clock>span{font-size:10px}.lab-model-label{text-align:left;padding-top:7px;font-size:9px}.lab-takeaway{flex-direction:column;gap:7px;padding:18px 0}.lab-takeaway p{font-size:14px}.lab-candidates{gap:7px}.lab-candidate{min-height:87px;padding:10px 7px}.lab-candidate>span{font-size:15px}.lab-candidate small{margin-top:4px;font-size:9px}.lab-candidate>svg{width:12px;height:12px;margin-top:3px;position:static}.lab-verify-link>span{gap:7px;font-size:11px}.lab-config-header,.lab-config-row{grid-template-columns:.7fr 1fr 1.1fr;gap:11px}.lab-config-row{min-height:70px;font-size:12px}.lab-config-row strong{font-size:10px}.lab-config-row>span:last-child{flex-wrap:wrap;gap:4px}.lab-tradeoff{gap:18px}.lab-tradeoff strong{font-size:12px}.lab-checkpoint h2{font-size:18px}.lab-check-choices{grid-template-columns:1fr}.platform-next{align-items:flex-start;gap:10px}.platform-next>div{max-width:34%}.platform-next>.lesson-secondary{max-width:64%;padding:10px 13px;font-size:12px}.platform-next .lesson-text-button{text-align:left;font-size:11px}.platform-footer{gap:12px;padding:16px 22px;font-size:9px}}@media (prefers-reduced-motion:reduce){.fast-lab *,.fast-lab :before,.fast-lab :after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.teaching-site{color:#202a30;letter-spacing:0;background:#f7f8fa;min-height:100vh;font-family:Inter,system-ui,sans-serif}.teaching-site *{box-sizing:border-box}.teaching-site a{color:inherit;text-decoration:none}.teaching-site button{font:inherit;cursor:pointer}.teaching-header{border-bottom:1px solid #dce2e7;justify-content:space-between;align-items:center;max-width:1180px;margin:auto;padding:28px 32px;display:flex}.teaching-header>a{font-size:23px;font-weight:700}.teaching-header span{color:#647078;margin-top:4px;font-size:12px;font-weight:400;display:block}.teaching-header button{background:#fff;border:1px solid #cdd6dc;border-radius:8px;padding:8px 14px}.teaching-site main{max-width:1180px;margin:auto;padding:40px 32px}.teaching-intro>p{color:#647078;font-size:12px}.teaching-intro h1{max-width:640px;margin:14px 0 44px;font-size:36px;line-height:1.2}.teaching-series-title{justify-content:space-between;align-items:center;gap:20px;display:flex}.teaching-series-title span{color:#68757d;font-size:11px}.teaching-series-title h2{margin:8px 0;font-size:30px}.teaching-series-title p{margin:0;font-size:18px}.teaching-series-title>a{color:#fff;background:#1d665e;border-radius:8px;align-items:center;gap:14px;padding:12px 18px;font-size:14px;display:flex}.teaching-premise{color:#58656f;max-width:720px;margin:20px 0 28px;line-height:1.6}.teaching-lessons{grid-template-columns:repeat(3,minmax(0,1fr));gap:30px 24px;display:grid}.teaching-lesson{min-width:0}.teaching-thumb{aspect-ratio:4/3;background:#e9edf1;border:1px solid #dde2e7;border-radius:8px;position:relative;overflow:hidden}.teaching-thumb img{object-fit:cover;width:100%;height:100%;transition:transform .25s}.teaching-lesson:hover img{transform:scale(1.035)}.teaching-thumb span{color:#253e50;background:#fff;border-radius:4px;padding:5px 8px;font-size:12px;position:absolute;top:10px;left:10px}.teaching-lesson h3{justify-content:space-between;gap:10px;margin:14px 0 7px;font-size:17px;display:flex}.teaching-lesson h3 svg{flex-shrink:0}.teaching-lesson p{color:#647078;margin:0;font-size:14px;line-height:1.5}.teaching-boundary{color:#58656f;border-top:1px solid #dce2e7;margin-top:40px;padding:20px 0;font-size:14px;line-height:1.7}.teaching-boundary summary{cursor:pointer}.teaching-site footer{color:#647078;max-width:1180px;margin:auto;padding:24px 32px;font-size:12px}.teaching-site :focus-visible{outline-offset:4px;outline:3px solid #237cbe}.lesson-video{border-bottom:1px solid #dce2e7;margin-bottom:28px;padding-bottom:24px}.lesson-video summary{cursor:pointer;padding:12px 0;font-size:17px;font-weight:600}.lesson-video video{object-fit:contain;background:#f3f5f8;border-radius:8px;width:100%;max-height:420px;margin:12px auto;display:block}.lesson-video p{color:#647078;font-size:12px}.site-return{color:#52646e;align-items:center;gap:6px;margin-right:12px;font-size:12px;text-decoration:none;display:inline-flex}@media (width<=700px){.teaching-header{padding:20px}.teaching-site main{padding:28px 20px}.teaching-intro h1{margin-bottom:30px;font-size:28px}.teaching-series-title{flex-direction:column;align-items:flex-start}.teaching-lessons{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 16px}.teaching-lesson h3{font-size:15px}.teaching-lesson p{font-size:12px}.teaching-site footer{padding:20px}.lesson-video video{max-height:330px}}@media (width<=430px){.teaching-lessons{grid-template-columns:1fr}.teaching-thumb{aspect-ratio:16/10}}@media (prefers-reduced-motion:reduce){.teaching-thumb img{transition:none}}