:root{font-family:var(--font-ui);color:#203b35;background:var(--page);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;--font-ui:-apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-display:Georgia, "Times New Roman", serif;--font-notation:ui-monospace, SFMono-Regular, Menlo, monospace;--page:#f7f8f3;--card:#fcfcf9;--sage:#567d6d;--sage-surface:#eef2eb;--secondary-action:#fbead7;--ink:#203b35;--muted:#65756f;--instruction-label:#486158;--green:#163f39;--line:#dce2d8;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--radius-control:7px;--control-height:46px;--primary-action:#174322;--secondary-border:#b8c9bd}*{box-sizing:border-box}body{min-width:280px;margin:0}input,textarea,select{font-family:inherit}button{font:inherit;-webkit-tap-highlight-color:transparent;cursor:pointer}button:focus-visible{outline-offset:4px;outline:3px solid #ba8029}h1:focus{outline:none}button:disabled{cursor:default}button,a{touch-action:manipulation}.app-shell{flex-direction:column;max-width:1200px;min-height:100svh;margin:0 auto;padding:0 48px;display:flex}.home-background{isolation:isolate;--motif-root-y:48px;position:relative}.home-background:before{content:"";z-index:-1;pointer-events:none;opacity:0;width:100vw;transform:translate(-50%, calc(var(--motif-root-y) - max(4.73506vw, 2.36753%)));background-blend-mode:normal, multiply;background:linear-gradient(#f6f7f38c,#f6f7f3c7 14%,#f6f7f3cc 65%,#f6f7f3e0),#f6f7f3 url(/opening-tree-background.png) top/cover no-repeat;transition:opacity 1s ease-out;position:absolute;top:0;bottom:0;left:50%}.home-background.home-is-scrolling:before{opacity:1;transition-duration:4s}@media (prefers-reduced-motion:reduce){.home-background:before,.home-background.home-is-scrolling:before{opacity:0;transition:none}}.app-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;height:96px;display:flex}.header-tools{justify-content:flex-end;align-items:center;gap:18px;min-width:0;display:flex}.home-header-tools{flex-direction:column;justify-content:center;align-items:flex-end;gap:4px;height:96px;position:relative}.utility-nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:14px;display:flex}.utility-nav .quiet-button{white-space:nowrap;min-height:0;padding:0;font-size:14px;font-weight:400}.home-meta-details{color:#9aa69f;text-align:right;justify-content:flex-end;align-items:center;font-size:12px;line-height:1.35;display:flex}.home-header-tools .home-meta-details{position:absolute;bottom:8px;right:0}.brand{color:var(--ink);letter-spacing:-.6px;text-align:left;background:0 0;border:0;align-items:center;gap:11px;padding:0;font-size:20px;font-weight:400;display:flex}.brand strong{font-weight:700}.brand-name{white-space:nowrap}.header-label{color:var(--muted);font-size:13px}main{flex:1}.eyebrow{text-transform:uppercase;letter-spacing:2px;color:var(--sage);margin:0 0 20px;font-size:12px;font-weight:650}h1{font-family:var(--font-display);letter-spacing:-2px;margin:0;font-weight:400;line-height:1.1}h1 em{color:#55796a;font-weight:400}.home-layout{gap:var(--space-5) 60px;padding:var(--space-6) 0 32px;grid-template-columns:1.05fr 1fr;align-items:start;display:grid}.home-layout>.home-copy{grid-area:1/1;align-self:start;container-type:inline-size}.home-layout>.home-demo{grid-area:1/2}.home-layout>.home-current,.home-layout>.home-progress-summary,.home-layout>.home-optional,.home-layout>.free-training{grid-column:1;align-self:start}.home-layout>.benchmark-card{grid-area:2/2;align-self:start}.home-layout>.benchmark-progress{grid-area:3/1/auto/-1;align-self:start}.home-copy h1{font-size:clamp(40px,4.6vw,58px)}.home-reassurance{color:var(--muted);margin:0 0 20px;font-size:16px;font-weight:500;line-height:1.45}.intro{color:var(--muted);max-width:380px;margin:25px 0 14px;font-size:16px;line-height:1.75}.content-scope{color:var(--muted);max-width:520px;margin:25px 0 18px;font-size:15px;line-height:1.6}.content-scope strong{color:var(--ink);font-weight:600}.content-scope span{color:#87938b;font-weight:400}.primary-button{background:var(--primary-action);color:#fff;border:1px solid var(--primary-action);border-radius:var(--radius-control);justify-content:space-between;align-items:center;gap:30px;width:100%;min-height:54px;padding:15px 21px;font-size:15px;font-weight:550;transition:background .15s,transform .15s;display:flex}.primary-button:hover{background:#20482a}.primary-button:active{transform:translateY(1px)}.start-button{max-width:268px}.session-facts{color:var(--muted);flex-wrap:wrap;gap:10px 18px;margin-top:17px;font-size:12px;display:flex}.session-facts span+span:before{content:"·";margin-right:18px}.home-board{position:relative}.board-figure{margin:0}.board-frame{--coordinate-gutter:22px;grid-template-columns:var(--coordinate-gutter) minmax(0, 1fr) var(--coordinate-gutter);grid-template-rows:var(--coordinate-gutter) auto var(--coordinate-gutter);background:var(--primary-action);border-radius:12px;width:100%;display:grid;position:relative;box-shadow:0 9px 18px -9px #142e2057}.board-surface{pointer-events:none;aspect-ratio:1;grid-area:2/2;min-width:0}.board-ranks,.board-files{color:#d1ded4;font-variant-numeric:tabular-nums;-webkit-user-select:none;user-select:none;font-size:11px;font-weight:400;line-height:1;display:grid}.board-ranks{grid-area:2/1;grid-template-rows:repeat(8,minmax(0,1fr))}.board-ranks-right{grid-column:3}.board-files{grid-area:3/2;grid-template-columns:repeat(8,minmax(0,1fr))}.board-files-top{grid-row:1}.board-ranks span,.board-files span{place-items:center;display:grid}.board-piece-image{object-fit:contain;pointer-events:none;width:100%;height:100%;display:block}.board-figure figcaption{color:var(--muted);justify-content:center;align-items:center;gap:6px;margin-top:12px;font-size:12px;display:flex}.board-flip-button{color:var(--muted);text-underline-offset:3px;background:0 0;border:0;padding:2px 0 2px 12px;font-size:14px;text-decoration:underline}.orientation-mark{background:#fff;border:1px solid #8b9c90;border-radius:50%;width:8px;height:8px;display:inline-block}.preview-caption{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:10px;margin-top:22px;padding-top:18px;font-size:14px;display:flex}.preview-caption .eyebrow{margin:0;font-size:10px}.caption-move{color:var(--muted);margin-left:8px}.collection{border-top:1px solid var(--line);grid-column:1/-1;align-items:baseline;gap:32px;padding-top:28px;display:flex}.collection .eyebrow{flex-shrink:0;margin:0}.collection p{color:var(--muted);margin:0;font-size:14px;line-height:1.8}.app-footer{color:var(--muted);justify-content:space-between;gap:16px;padding:28px 0;font-size:12px;display:flex}.training{padding:30px 0 35px}.session-topline{color:var(--muted);justify-content:space-between;gap:12px;font-size:14px;display:flex}.session-topline strong{color:var(--ink)}.session-progress{appearance:none;background:var(--line);border:0;border-radius:5px;width:100%;height:3px;margin:12px 0 36px;display:block;overflow:hidden}.session-progress::-webkit-progress-bar{background:var(--line)}.session-progress::-webkit-progress-value{background:var(--sage);transition:width .2s}.session-progress::-moz-progress-bar{background:var(--sage)}.training-layout{grid-template-columns:minmax(0,1.18fr) minmax(0,1fr);align-items:start;gap:64px;display:grid}.question-panel{padding:12px 0 0}.question-panel h1{letter-spacing:-1.5px;font-size:40px}.question-eyebrow{margin-bottom:14px}.question-help{color:var(--muted);margin:16px 0 24px;font-size:14px;line-height:1.6}.answers{gap:10px;display:grid}.mastery-answers{margin-top:var(--space-4)}.answer-button{border:1px solid var(--line);background:var(--card);color:var(--ink);text-align:left;border-radius:7px;align-items:center;gap:13px;width:100%;min-height:59px;padding:12px 15px;font-size:15px;transition:border-color .15s,background .15s;display:flex}.answer-button:not(:disabled):hover{background:#eff3ec;border-color:#688b73}.answer-letter{color:#68776c;border:1px solid #e1e7dd;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:26px;height:27px;font-size:12px;display:flex}.answer-icon{margin-left:auto;display:flex}.answer-correct{color:#285733;background:#e8f0e6;border-color:#598362}.answer-wrong{color:#954533;background:#f9eeeb;border-color:#bd8778}.answer-selected{background:#f2f5ef;border-color:#7c9884}.answer-hint{color:var(--muted);margin:23px 0 0;font-size:12px;line-height:1.6}.feedback-block{margin-top:23px;animation:.2s ease-out appear}.feedback-label{color:#285733;flex-wrap:wrap;align-items:center;gap:6px;margin:0 0 9px;font-size:14px;font-weight:650;display:flex}.incorrect-label{color:#954533}.feedback-name{font-weight:500}.hierarchy-label-parent{font-weight:400}.hierarchy-label-child{font-weight:650}.feedback-explanation{color:#4f6257;margin:0 0 12px;font-size:14px;line-height:1.7}.move-sequence{font-family:var(--font-notation);letter-spacing:-.3px;background:var(--sage-surface);color:#344e3c;border-radius:5px;margin:0 0 19px;padding:10px 13px;font-size:13px;line-height:1.8}.results{text-align:center;max-width:560px;margin:0 auto;padding:46px 0 32px}.results h1{font-size:44px}.score{letter-spacing:-5px;justify-content:center;align-items:baseline;gap:10px;margin-top:27px;font-family:Georgia,serif;font-size:100px;line-height:1;display:flex}.score-total{font-family:var(--font-ui);color:#819082;letter-spacing:-1px;font-size:30px}.score-caption{color:var(--muted);margin-top:9px;font-size:14px}.result-track{justify-content:center;gap:6px;margin:25px 0 35px;display:flex}.result-tick{border-radius:4px;place-items:center;width:30px;height:30px;display:grid}.correct-tick{color:#386143;background:#e1ecdf}.wrong-tick{color:#974c35;background:#f3e6df}.review-list{text-align:left;border-top:1px solid var(--line);margin-bottom:28px;padding-top:24px}.review-list h2{margin:0 0 18px;font-size:17px;font-weight:550}.review-list>p,.review-item>p:not(.move-sequence){color:var(--muted);font-size:14px;line-height:1.7}.review-item{border-bottom:1px solid var(--line);margin-top:18px;padding-bottom:14px}.review-item h3{margin:0 0 8px;font-size:15px;font-weight:600}.review-item .move-sequence{margin:0}.review-item>p:last-child{margin-bottom:0}.benchmark-result-actions{gap:10px;margin-top:8px;display:grid}.benchmark-result-actions .secondary-button{width:100%}.benchmark-result-actions .benchmark-retake{justify-self:center;margin-top:2px}.review-skill-list{text-align:left;border-top:1px solid var(--line);margin:28px 0 30px}.review-skill-list h2{margin:22px 0 8px;font-size:17px;font-weight:550}.review-skill-item{border-bottom:1px solid var(--line);padding:16px 0 14px}.review-skill-item h3{margin:0 0 5px;font-size:16px}.review-skill-item>div>p{color:var(--muted);margin:0;font-size:13px;line-height:1.55}.review-skill-item dl{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:15px 0 3px;display:grid}.review-skill-item dl>div{color:var(--muted);justify-content:flex-start;gap:6px;font-size:12px;display:flex}.review-skill-item dt,.review-skill-item dd{margin:0}.review-skill-item dd{color:var(--ink);text-align:left;font-weight:600}.review-needs-attention{color:#954533!important}.review-skill-item .text-button{padding-top:8px;padding-bottom:4px;padding-left:0}.orientation-label{color:var(--muted);margin:18px 0 7px;font-size:13px;font-weight:600}.orientation-list{color:var(--muted);gap:4px;margin:0;padding-left:18px;font-size:14px;line-height:1.45;display:grid}.named-opening-list{color:var(--muted);gap:4px;margin:10px 0 0;padding-left:20px;font-size:15px;line-height:1.5;display:grid}.text-button{color:var(--muted);text-underline-offset:4px;background:0 0;border:0;min-height:48px;margin-top:6px;padding:16px;font-size:14px;text-decoration:underline}.utility-page{max-width:640px;margin:0 auto;padding:64px 0 72px}.utility-page h1{font-size:clamp(42px,5vw,60px)}.utility-copy{color:#42574c;margin-top:36px;font-size:16px;line-height:1.75}.utility-copy p{margin:0 0 21px}.creator-signoff{color:var(--ink);margin-top:34px!important}.creator-signoff span{color:var(--muted);font-size:14px}.utility-page-actions{border-top:1px solid var(--line);margin-top:46px;padding-top:27px}.utility-page-actions .eyebrow{margin-bottom:14px}.utility-page-actions .primary-button,.feedback-success .primary-button{max-width:100%}.utility-page-actions .text-button,.feedback-secondary-links .text-button{padding-left:0}.feedback-page{max-width:680px}.utility-lede{color:var(--muted);margin:25px 0 34px;font-size:16px;line-height:1.75}.feedback-form{gap:10px;display:grid}.feedback-form label{color:var(--ink);margin-top:10px;font-size:14px;font-weight:600}.feedback-form label:first-child{margin-top:0}.feedback-form select,.feedback-form input,.feedback-form textarea{border-radius:var(--radius-control);width:100%;color:var(--ink);font:inherit;background:#fff;border:1px solid #cbd8cc;padding:12px 13px;font-size:15px}.feedback-form select,.feedback-form input{min-height:48px}.feedback-form textarea{resize:vertical;min-height:170px;line-height:1.6}.feedback-form select:focus,.feedback-form input:focus,.feedback-form textarea:focus{outline-offset:2px;border-color:#8aa995;outline:3px solid #ba802955}.feedback-form input:disabled,.feedback-form textarea:disabled,.feedback-form select:disabled{opacity:.65}.field-note{color:var(--muted);margin-top:4px;font-size:12px;font-weight:400;line-height:1.5;display:block}.feedback-error{color:#7f3d2f;background:#f9eeeb;border:1px solid #d9b2a6;border-radius:6px;margin:10px 0 4px;padding:12px 13px;font-size:14px;line-height:1.55}.privacy-note{color:var(--muted);margin:5px 0 0;font-size:12px;line-height:1.6}.feedback-secondary-links{justify-items:start;margin-top:27px;display:grid}.feedback-success{text-align:center;max-width:560px}.feedback-success .utility-lede{max-width:420px;margin-left:auto;margin-right:auto}.interest-signup{border-top:1px solid var(--line);grid-column:1/-1;max-width:620px;margin-top:8px;padding:30px 0 4px}.interest-signup h2{font-family:var(--font-display);letter-spacing:-1px;margin:0 0 10px;font-size:30px;font-weight:400}.interest-signup>p:not(.eyebrow):not(.interest-success){color:var(--muted);max-width:560px;margin:0 0 19px;font-size:14px;line-height:1.65}.interest-form{gap:8px;max-width:560px;display:grid}.interest-form label{color:var(--ink);font-size:13px;font-weight:600}.interest-form-row{gap:9px;display:flex}.interest-form-row input{border-radius:var(--radius-control);min-width:0;color:var(--ink);font:inherit;background:#fff;border:1px solid #cbd8cc;flex:1;padding:11px 12px;font-size:14px}.interest-form-row input:focus{outline-offset:2px;border-color:#8aa995;outline:3px solid #ba802955}.interest-form-row .secondary-button{white-space:nowrap}.interest-form-row input:disabled,.interest-form-row button:disabled{opacity:.65}.interest-success{color:#285733;margin:0;font-size:14px;line-height:1.6}.interest-error{color:#7f3d2f;background:#f9eeeb;border:1px solid #d9b2a6;border-radius:6px;margin:5px 0 0;padding:10px 12px;font-size:13px;line-height:1.55}@keyframes appear{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.primary-button:disabled{color:#637266;background:#dce4db;border-color:#dce4db;transform:none}.secondary-button{border-radius:var(--radius-control);background:var(--secondary-action);color:var(--ink);min-height:var(--control-height);border:1px solid #0000;padding:12px 16px;font-size:14px;font-weight:400}.secondary-button:not(:disabled):hover{background:#f5dfc6}.secondary-button:not(:disabled):active{background:#efd5b8}.quiet-button{color:var(--muted);text-align:left;background:0 0;border:0;min-height:44px;padding:0 10px 0 0;font-size:14px}.learning-collection{justify-content:space-between}.learning-collection .eyebrow{margin-bottom:8px;display:block}.original-collection{color:var(--muted);grid-column:1/-1;margin-top:-12px;font-size:14px}summary{cursor:pointer;padding:12px 0;line-height:1.6}summary:focus-visible{outline-offset:3px;outline:3px solid #ba8029}.original-collection p{line-height:1.7}.level-context{color:var(--muted);letter-spacing:1.7px;text-transform:uppercase;margin:28px 0 0;font-size:12px;font-weight:650}.journey-progress{border-bottom:1px solid var(--line);align-items:center;gap:28px;margin:0;padding:22px 0;list-style:none;display:flex}.journey-progress li{color:var(--muted);align-items:center;gap:8px;font-size:14px;display:flex}.journey-progress li>span{border:1px solid #bccabb;border-radius:50%;place-items:center;width:24px;height:24px;font-size:12px;display:grid}.journey-progress .current-stage{color:var(--green);font-weight:600}.current-stage>span,.finished-stage>span{background:var(--green);color:#fff;border-color:var(--green)!important}.branch-progress{gap:10px;margin:24px 0 0;padding:0;list-style:none;display:flex}.branch-progress li{text-align:center;border-bottom:2px solid var(--line);color:var(--muted);flex:1;padding:5px 2px 10px;font-size:14px}.branch-progress button{color:inherit;font:inherit;background:0 0;border:0;width:100%;min-height:30px;padding:0}.branch-progress button:focus-visible{outline-offset:3px;outline:3px solid #ba8029}.branch-progress span{color:var(--muted);margin-right:8px;font-size:11px}.branch-progress .active-branch{color:var(--green);border-color:var(--green);font-weight:650}.learning-path{color:var(--muted);flex-wrap:wrap;gap:8px;margin:12px 0 26px;padding:0;font-size:14px;list-style:none;display:flex}.learning-path li{align-items:center;gap:8px;display:flex}.learning-path li:last-child{color:var(--green)}.lesson-copy h1{font-size:40px}.lesson-copy h2{margin:0 0 8px;font-size:15px;font-weight:650}.shared-learn h1{overflow-wrap:break-word}.shared-learn .learn-secondary{color:var(--muted);font-size:14px}.shared-learn .learn-secondary h2{color:var(--muted);font-size:13px}.shared-learn .learn-secondary summary{cursor:pointer;padding:10px 0}.shared-learn .learn-complete{color:var(--green);margin:20px 0;font-size:14px;font-weight:600}.lesson-copy p{line-height:1.7}.lesson-copy .lesson-branch{color:#4f6257;margin:20px 0;font-size:16px}.lesson-detail{margin:20px 0}.lesson-copy .learn-target-identity{color:var(--ink);margin:0 0 16px;font-size:23px;font-weight:600}.lesson-copy .learn-target-kind{color:var(--muted);margin:0 0 6px;font-size:13px}.shared-learn .lesson-copy h1+.primary-button{margin-top:24px}.level-introduction-preview{color:var(--ink);gap:8px;margin:20px 0 24px;padding-left:20px;font-size:18px;line-height:1.5;display:grid}.learn-branch-map h2{color:var(--ink);font-size:23px}.learn-branch-map .orientation-list{color:var(--ink);gap:8px;font-size:16px}.lesson-detail p{color:var(--muted);margin:0;font-size:15px}.defining-move{color:var(--ink);border-left:2px solid #b8a476;padding:8px 0 8px 14px;font-size:14px}.history-note{border-top:1px solid var(--line);padding-top:18px}.memory-hook{color:#5d6655;border-left:2px solid #b8a476;margin:20px 0 24px;padding:4px 0 4px 14px;font-size:14px}.lesson-supporting{color:var(--muted);margin:16px 0 22px;font-size:15px;line-height:1.7}.onboarding-text-layout{grid-template-columns:minmax(0,1fr);width:100%;max-width:760px;margin:0 auto}.onboarding-text-layout .question-panel{width:100%;max-width:none}.onboarding .session-topline{align-items:center;gap:8px}.onboarding-step-count{white-space:nowrap}.onboarding .session-topline .quiet-button{white-space:nowrap;flex-shrink:0;padding-right:0;font-size:12px}.onboarding .training-board .memory-hook{margin-bottom:0}.onboarding-paragraphs{margin:18px 0 22px}.onboarding-paragraphs p{color:#4f6257;margin:0 0 13px;font-size:16px;line-height:1.65}.onboarding-hierarchy{background:var(--sage-surface);border-radius:7px;gap:4px;margin:22px 0;padding:16px;display:grid}.onboarding-hierarchy-entry{color:var(--ink);overflow-wrap:break-word;font-size:15px;line-height:1.5}.onboarding-hierarchy-arrow{color:#789184;font-size:14px;line-height:1.2}.onboarding-levels{border-top:1px solid var(--line);margin:22px 0}.onboarding-level-row{border-bottom:1px solid var(--line);grid-template-columns:86px minmax(0,1fr);align-items:baseline;gap:14px;padding:13px 0;display:grid}.onboarding-level-row>span{color:var(--sage);letter-spacing:1.3px;text-transform:uppercase;font-size:11px;font-weight:700}.onboarding-level-row strong{color:var(--ink);font-size:16px;font-weight:600}.onboarding-level-continuation strong{color:var(--muted);font-weight:400}.onboarding-level-continuation>span{letter-spacing:.8px;white-space:nowrap}.onboarding-skill-visual{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:22px 0;display:grid}.onboarding-skill-visual article{border:1px solid var(--line);background:var(--card);border-radius:6px;padding:17px}.onboarding-skill-visual article h2{margin:0 0 12px;font-size:19px}.onboarding-skill-visual article p{margin:0;font-size:15px;line-height:1.6}.onboarding-skill-visual article .onboarding-skill-mapping{color:var(--muted);margin-top:17px;font-size:13px}.onboarding-flow{color:var(--ink);margin:22px 0;padding:0;list-style:none}.onboarding-flow li{flex-direction:column;align-items:flex-start;gap:5px;font-size:16px;display:flex}.onboarding-flow li>span{color:#789184;margin:5px 0;font-size:14px}.onboarding-final-line{color:var(--ink);margin:20px 0 24px;font-weight:600;line-height:1.6}.onboarding-home-button{margin:10px auto 0;display:block}.move-controls{align-items:center;gap:8px;margin-top:20px;display:flex}.move-controls button,.first-move-options button{border:1px solid var(--line);min-width:44px;min-height:44px;color:var(--green);background:#fff;border-radius:6px;padding:10px;font-size:14px}.move-controls button:disabled{opacity:.35}.move-steps{flex-wrap:wrap;flex:1;justify-content:center;gap:5px;display:flex}.move-steps button[aria-pressed=true]{background:var(--green);color:#fff;border-color:var(--green)}.board-step-status{text-align:center;color:var(--muted);margin:12px 0 0;font-size:13px;line-height:1.6}.reveal-move{width:100%;margin:0 0 3px}.intro-layout{margin-top:25px}.first-move-navigation{margin-top:18px}.first-move-nav-label{color:var(--sage);letter-spacing:1.7px;text-transform:uppercase;margin:0;font-size:10px;font-weight:700;line-height:1.3}.first-move-options{border-bottom:1px solid var(--line);gap:4px;margin-top:0;display:flex}.first-move-overview{padding:0;list-style:none}.first-move-overview li{min-width:0;min-height:38px;color:var(--muted);border-bottom:2px solid #0000;flex:1;place-items:center;padding:7px 6px 8px;font-size:13px;font-weight:550;display:grid}.first-move-overview li.current-branch{color:var(--green);border-bottom-color:var(--green)}.first-move-overview li.completed-branch{color:#55796a}.first-move-overview li.future-branch{color:#9aa69f}.first-move-overview li>span{display:none}.first-move-description,.contrast-cue{background:#eaf0e7;border-radius:6px;margin:22px 0;padding:17px}.first-move-description p,.contrast-cue p{color:#4e6253;margin:0;font-size:15px}.unit-intro{border-top:1px solid var(--line);margin:24px 0;padding-top:20px}.unit-intro .eyebrow{margin-bottom:12px;font-size:11px;display:block}.unit-intro p{color:var(--muted);margin-bottom:0;font-size:15px}.contrast-options{grid-template-columns:1fr 1fr;gap:8px;margin-top:20px;display:grid}.contrast-options button{color:var(--ink);text-align:left;background:0 0;border:1px solid #b8c9bd;border-radius:6px;padding:13px 10px}.contrast-options button[aria-pressed=true]{background:#e0eadd;border-color:#4b7359}.contrast-options strong,.contrast-options span{font-size:14px;display:block}.contrast-options span{color:var(--muted);margin-top:7px}.comparison-target-list{grid-template-columns:minmax(0,1fr)}.comparison-target-list button{align-items:center;gap:12px;min-height:48px;display:flex}.comparison-target-list span{margin:0}.learn-summary .learn-complete{color:var(--green);margin:20px 0;font-size:14px;font-weight:600}.lesson-note{color:var(--muted);font-size:15px}.name-note{color:var(--muted);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:15px 0 22px;font-size:14px}.name-note p{margin:0 0 16px}.learn-name-history summary{cursor:pointer;min-height:44px;padding:12px 0}.learn-name-history p{overflow-wrap:anywhere}:is(.shared-learn,.level-introduction,.learn-summary) :is(.lesson-detail p,.learn-move-explanation p,.lesson-branch,.lesson-supporting,.lesson-note,.name-note,.orientation-list,.named-opening-list,.contrast-cue p,.comparison-target-list span),.shared-learn .learn-secondary{color:var(--ink)}:is(.shared-learn,.level-introduction,.learn-summary) :is(.lesson-copy h2,.name-note summary,.learn-naming>strong){color:var(--instruction-label)}@media (width>=681px){:is(.shared-learn,.level-introduction,.learn-summary) :is(.learn-move-explanation>p:not(.defining-move),.lesson-branch){font-size:17px;line-height:1.6}:is(.shared-learn,.level-introduction,.learn-summary) :is(.lesson-detail p,.lesson-supporting,.lesson-note,.contrast-cue p:not(.move-sequence),.named-opening-list){font-size:16px;line-height:1.6}:is(.shared-learn,.level-introduction,.learn-summary) :is(.name-note p,.name-note li,.orientation-list){font-size:15px;line-height:1.6}.shared-learn .learn-branch-map .orientation-list{font-size:17px}}.guided-hint{background:#eaf0e7;border-radius:6px;margin:0 0 20px;padding:14px 16px;font-size:14px;line-height:1.65}.guided-hint strong{text-transform:uppercase;letter-spacing:1px;margin-bottom:3px;font-size:12px;display:block}.learning-summary{color:var(--muted);max-width:440px;margin:23px auto;font-size:15px;line-height:1.7}.review-button{margin-top:4px;padding-left:0}.finish-session{margin:20px auto 0;display:block}.answer-correct .answer-icon{animation:.18s ease-out appear}.mode-choices{grid-template-columns:1fr 1fr;gap:10px;display:grid}.mode-choices button{text-align:left;gap:8px;min-height:78px;padding:15px;font-size:17px}.mode-choices small{margin-top:7px;font-size:12px;font-weight:400;line-height:1.4;display:block}.train-choice{background:#fff;justify-content:space-between;align-items:center;display:flex}.onboarding-link{text-align:left;margin-top:18px;padding-bottom:4px;padding-left:0}.onboarding-link+.answer-hint{margin-top:2px}.exit-button{flex-shrink:0;padding:8px 0 8px 8px;font-size:13px}.home-progress{border-top:1px solid var(--line);grid-column:1/-1;padding:28px 0 0}.home-progress h2{margin:0 0 10px;font-family:Georgia,serif;font-size:27px;font-weight:400}.home-progress .eyebrow{margin-bottom:12px}.home-progress p{color:var(--muted);font-size:14px;line-height:1.6}.opening-status-list{margin:18px 0;padding:0;list-style:none}.opening-status-list li{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:15px;padding:13px 0;font-size:14px;display:flex}.opening-status-list li>span:last-child{color:var(--muted);text-align:right;font-size:12px}.opening-status-list li>.needs-review{color:#8a5034!important}.home-progress .progress-note{font-size:12px}.collection-options{gap:12px;margin:26px 0;display:grid}.collection-options button{text-align:left;padding:18px}.collection-options button[aria-pressed=true]{background:#e3ecdf;border-color:#4b7359}.collection-options strong,.collection-options span{display:block}.collection-options span{color:var(--muted);margin-top:8px;font-size:14px;line-height:1.6}.storage-warning{color:#664c22;background:#fff0cc;border-radius:5px;padding:14px;font-size:14px;line-height:1.6}.onboarding-moves{text-align:center;margin-top:20px}.lesson-reveal{animation:.2s ease-out appear}.data-settings>.text-button{margin:10px auto;display:block}dialog{color:var(--ink);border:1px solid var(--line);text-align:left;background:#f6f7f3;border-radius:12px;width:calc(100% - 32px);max-width:450px;padding:28px;box-shadow:0 20px 80px #16362c40}dialog::backdrop{background:#112a2366}dialog h2{margin:0 0 14px;font-family:Georgia,serif;font-size:27px;font-weight:400}.data-settings #clear-title:focus{outline:none}dialog p{color:var(--muted);font-size:15px;line-height:1.7}.dialog-actions{justify-content:flex-end;gap:10px;margin-top:23px;display:flex}.danger-button{color:#fff;background:#8f3f32;border:1px solid #8f3f32;border-radius:7px;min-height:46px;padding:12px 16px;font-size:14px}@media (width>=900px){.training-board{position:sticky;top:24px}}@media (width<=900px){.app-shell{padding:0 28px}.home-layout{gap:var(--space-6) 36px}.training-layout{gap:32px}.question-panel h1{font-size:32px}.collection{gap:20px}}@media (width<=680px){.home-background{--motif-root-y:26px}.home-meta-details{gap:9px;font-size:11px}.journey-progress{justify-content:space-between;align-items:flex-start;gap:4px;padding:16px 0}.journey-progress li{text-align:center;flex-direction:column;flex:auto;gap:6px;font-size:clamp(11px,3.1vw,14px)}.journey-progress li>span{flex-shrink:0;width:20px;height:20px;font-size:11px}.branch-progress{gap:6px;margin-top:15px}.branch-progress span{margin-right:4px}.learning-path{margin:10px 0 19px;font-size:13px}.lesson-copy h1{font-size:32px}.lesson-copy .eyebrow{margin-bottom:12px;font-size:11px}.intro-layout{margin-top:15px}.lesson-copy .lesson-branch{margin:14px 0}.onboarding-skill-visual{grid-template-columns:1fr}.learning-collection>p{margin-top:15px}.session-topline{align-items:center}.app-shell{max-width:500px;padding:0 20px}.app-header{flex-wrap:wrap;gap:8px;height:auto;min-height:70px;padding:10px 0}.brand{letter-spacing:-.55px;gap:9px;font-size:15px}.brand img{width:28px;height:28px}.app-header>.quiet-button{font-size:12px}.header-tools{flex-direction:column-reverse;align-items:flex-end;gap:3px}.home-header-tools{flex-direction:column;justify-content:flex-end;gap:4px;height:auto}.home-header-tools .home-meta-details{position:static}.app-header>.home-meta,.app-header>.header-tools{width:100%}.utility-nav{flex-wrap:wrap;gap:8px}.header-label{display:none}.home-layout{gap:var(--space-4);grid-template-columns:1fr;padding:35px 0 14px}.home-layout>.home-copy,.home-layout>.home-demo,.home-layout>.home-current,.home-layout>.benchmark-card,.home-layout>.benchmark-progress,.home-layout>.home-progress-summary,.home-layout>.home-optional,.home-layout>.free-training{grid-area:auto/1}.home-copy h1{letter-spacing:-1.6px;font-size:43px}.home-copy .eyebrow{margin-bottom:15px;font-size:11px}.intro{margin:17px 0 12px;font-size:15px;line-height:1.65}.content-scope{margin:17px 0 12px;font-size:14px;line-height:1.5}.desktop-break{display:none}.start-button{max-width:none}.session-facts{justify-content:center;gap:10px 12px;margin-top:14px;font-size:12px}.session-facts span+span:before{margin-right:12px}.home-board,.home-demo{width:100%;max-width:340px;margin:auto}.home-current{margin-top:20px}.home-progress-summary{margin-top:12px}.path-intro{text-align:left;margin:35px auto 25px}.path-intro h1,.level-overview-header h1{font-size:42px}.path-intro p:not(.eyebrow),.level-overview-header>p:not(.eyebrow){margin-top:14px}.path-level-row{grid-template-columns:28px minmax(0,1fr);gap:11px;padding:17px 0}.path-level-row>button,.path-level-row>.path-status{grid-column:2;justify-self:start}.path-level-row .secondary-button{min-width:0}.level-overview-header{text-align:left;margin:36px auto 25px}.overview-status{justify-content:flex-start}.level-overview-actions{grid-template-columns:1fr;margin-bottom:32px}.level-overview-actions .primary-button{grid-column:auto}.overview-opening-list li{gap:8px;display:grid}.overview-opening-list code{white-space:normal}.preview-caption{margin-top:15px;padding-top:14px}.collection{padding-top:22px;display:block}.collection .eyebrow{margin-bottom:10px;font-size:11px}.collection p{font-size:13px}.app-footer{padding:24px 0;font-size:11px}.app-footer span:last-child{display:none}.training{padding:19px 0 8px}.session-progress{margin:10px 0 19px}.training-layout{flex-direction:column;gap:20px;display:flex}.training-board{width:100%}.board-frame{--coordinate-gutter:20px}.board-figure figcaption{margin-top:9px;font-size:11px}.question-panel{width:100%;padding:0}.question-panel h1{letter-spacing:-.8px;font-size:32px}.question-eyebrow{display:none}.question-help{margin:8px 0 15px;font-size:13px}.answers{gap:8px}.answer-button{min-height:52px;padding:10px 12px;font-size:15px}.answer-hint{margin-top:16px;font-size:12px}.feedback-block{margin-top:18px}.results{padding:36px 0 10px}.results h1{letter-spacing:-1.5px;font-size:37px}.results .eyebrow{font-size:11px}.utility-page{padding:38px 0 45px}.utility-page h1{letter-spacing:-1.5px;font-size:39px}.utility-copy{margin-top:27px;font-size:15px;line-height:1.75}.utility-lede{margin:18px 0 25px;font-size:15px;line-height:1.65}.utility-page-actions{margin-top:34px;padding-top:23px}.feedback-form textarea{min-height:150px}.interest-signup{padding-top:24px}.interest-signup h2{font-size:27px}.interest-form-row{gap:8px;display:grid}.interest-form-row .secondary-button{width:100%}.benchmark-dimensions{grid-template-columns:1fr;gap:10px;margin:22px 0}.benchmark-dimension p:not(.eyebrow){min-height:0}.benchmark-hub h1{font-size:37px}.result-track{gap:5px}.result-tick{width:27px;height:28px}}@media (width<=360px){.app-header{flex-wrap:wrap;row-gap:5px;height:auto;min-height:70px;padding:10px 0}.app-header .home-meta{width:100%}.app-header .brand{font-size:15px}.app-header .home-meta{min-width:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.level-cards{gap:16px;margin:24px 0;display:grid}.level-card{border:1px solid var(--line);background:#ffffff73;border-radius:16px;padding:22px}.level-card h2{margin:8px 0;font-size:23px}.level-card p{line-height:1.55}.level-status{color:var(--muted);margin:12px 0;font-size:14px;display:block}.level-card button{width:100%}.home-skip-intro{margin-top:var(--space-2);padding-top:10px;padding-bottom:2px;font-size:13px}.free-training{gap:var(--space-3);border-top:1px solid var(--line);padding-top:var(--space-5);margin-top:var(--space-6);display:grid}.free-training>p{margin:0 0 var(--space-1);color:var(--muted)}.free-training button{width:100%}.next-level{color:var(--muted);grid-column:1/-1;margin:0;line-height:1.6}.home-board{align-self:start}.benchmark-card{border:1px solid var(--line);background:#ffffff73;border-radius:16px;padding:22px}.benchmark-card-copy .eyebrow{margin-bottom:10px}.benchmark-card h2{margin:0 0 8px;font-size:25px}.benchmark-card-copy>p:last-child{color:var(--muted);margin:0;font-size:14px;line-height:1.55}.benchmark-card-action{justify-content:space-between;width:100%;margin-top:19px;display:flex}.benchmark-history{border-top:1px solid var(--line);margin-top:21px;padding-top:15px}.benchmark-history h3{color:var(--muted);letter-spacing:.7px;margin:0 0 8px;font-size:12px;font-weight:650}.benchmark-history-row{min-height:28px;color:var(--muted);border-bottom:1px solid #e5e9e2;justify-content:space-between;align-items:center;gap:16px;font-size:13px;display:flex}.benchmark-history-row strong{color:var(--ink);font-weight:550}.benchmark-history-placeholder{color:#aab6ac;font-style:italic}.benchmark-history-placeholder em{font-style:italic}.benchmark-progress{border:1px solid var(--line);background:#ffffff73;border-radius:16px;padding:24px 28px 21px}.benchmark-progress-header{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.benchmark-progress h2{color:var(--ink);letter-spacing:-.3px;margin:0;font-size:22px;font-weight:550}.benchmark-progress-legend{color:var(--muted);flex-wrap:wrap;justify-content:flex-end;gap:7px 12px;font-size:10px;display:flex}.benchmark-progress-legend-item{white-space:nowrap;align-items:center;gap:5px;display:inline-flex}.benchmark-progress-swatch{flex:0 0 8px;width:8px;height:8px;display:inline-block}.benchmark-progress-swatch-circle{border-radius:50%}.benchmark-progress-swatch-square{border-radius:2px}.benchmark-progress-chart{width:100%;margin-top:13px;position:relative}.benchmark-progress-chart svg{width:100%;height:260px;display:block;overflow:visible}.benchmark-chart-grid{stroke:var(--line);stroke-width:.45px}.benchmark-chart-line{fill:none;stroke-width:1.2px;stroke-linecap:round;stroke-linejoin:round}.benchmark-chart-axis-label{fill:var(--muted);font-variant-numeric:tabular-nums;font-size:13px}.benchmark-chart-x-label{font-size:13px}.benchmark-chart-point{cursor:pointer;stroke:#f6f7f3;stroke-width:2px;outline:none}.benchmark-chart-point:hover,.benchmark-chart-point:focus-visible{stroke:#ba8029;stroke-width:1.3px}.benchmark-chart-tooltip{z-index:2;pointer-events:none;border:1px solid var(--line);min-width:120px;max-width:170px;color:var(--ink);font-variant-numeric:tabular-nums;background:#f6f7f3;border-radius:6px;padding:7px 9px;font-size:14px;line-height:1.35;position:absolute;transform:translate(-50%,calc(-100% - 7px));box-shadow:0 5px 18px #16362c1c}.benchmark-chart-tooltip-below{transform:translate(-50%,7px)}.benchmark-chart-tooltip strong,.benchmark-chart-tooltip span{display:block}.benchmark-chart-tooltip strong{font-weight:600}.benchmark-chart-tooltip span{color:var(--muted);margin-top:2px}.benchmark-dimension-summary{gap:10px;margin-top:20px;display:grid}.benchmark-dimension-summary>div{border-top:1px solid var(--line);color:var(--muted);grid-template-columns:1fr auto auto;align-items:center;gap:12px;padding-top:10px;font-size:13px;display:grid}.benchmark-dimension-summary strong{color:var(--ink);font-weight:550}.benchmark-dimension-summary .text-button{margin:0;padding:4px 0;font-size:12px}.benchmark-hub{max-width:760px}.benchmark-hub h1{font-size:clamp(40px,5vw,58px)}.benchmark-hub>.learning-summary{max-width:620px}.benchmark-dimensions{text-align:left;grid-template-columns:1fr 1fr;gap:14px;margin:30px 0;display:grid}.benchmark-dimension{border:1px solid var(--line);background:#ffffff73;border-radius:14px;padding:20px}.benchmark-dimension .eyebrow{margin-bottom:10px;font-size:10px}.benchmark-dimension h2{margin:0 0 8px;font-size:22px}.benchmark-dimension p:not(.eyebrow){color:var(--muted);min-height:68px;font-size:14px;line-height:1.6}.benchmark-dimension .benchmark-latest{min-height:0;margin:13px 0 15px;font-size:13px}.benchmark-latest strong{color:var(--ink);font-weight:600}.benchmark-dimension .secondary-button{width:100%}.benchmark-pool-section{border-top:1px solid var(--line);text-align:left;padding-top:24px}.benchmark-pool-section>.eyebrow{margin-bottom:10px}.reconstruction-board .board-surface{pointer-events:auto}.reconstruction-board .board-surface [data-piece]{cursor:pointer}.reconstruction-skip{width:100%;margin-top:18px}.guided-reconstruction-first-time{color:var(--ink);margin:0 0 18px;font-size:17px;font-weight:600;line-height:1.5}.guided-reconstruction-your-turn{color:var(--sage);letter-spacing:2px;margin:14px 0 7px;font-size:12px;font-weight:700}.guided-reconstruction-instruction{color:var(--ink);margin:0 0 8px;font-size:16px;line-height:1.55}.guided-reconstruction-howto{color:var(--muted);margin:0 0 16px;font-size:13px;line-height:1.55}.guided-reconstruction-turn{color:var(--ink);margin:18px 0 12px;font-size:14px;font-weight:600}.guided-reconstruction-feedback{color:#954533;margin:0 0 12px;font-size:14px;line-height:1.6}.guided-reconstruction-feedback-title{color:#954533;line-height:1.08;margin:0 0 22px!important;font-size:clamp(30px,4vw,45px)!important}.guided-reconstruction-answer-label{color:var(--ink);margin:0 0 18px;font-size:17px;line-height:1.45}.guided-reconstruction-actions{align-items:center;gap:12px;margin-top:18px;display:flex}.guided-reconstruction-actions .secondary-button{flex:1}.guided-reconstruction-actions .text-button{white-space:nowrap;margin:0;padding:10px 0}.guided-reconstruction-complete .training-layout{align-items:start}@media (width<=680px){.benchmark-progress{padding:20px 16px 16px}.benchmark-progress-header{flex-direction:column;align-items:flex-start;gap:8px}.benchmark-progress-legend{justify-content:flex-start}.benchmark-progress-chart svg{height:220px}.benchmark-chart-axis-label,.benchmark-chart-x-label{font-size:13px}.benchmark-chart-tooltip{max-width:150px}}.guided-practice-complete{max-width:620px}.reconstruction-results .learning-summary{margin-bottom:25px}.reconstruction-scoring-note{color:var(--muted);max-width:470px;margin:-8px auto 25px;font-size:13px;line-height:1.65}.reconstruction-breakdown{text-align:left;border-top:1px solid var(--line);margin:25px 0 28px}.reconstruction-breakdown>div{border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:15px;padding:11px 0;font-size:14px;display:flex}.reconstruction-breakdown strong{color:var(--ink);font-weight:550}.home-demo{align-self:start;min-width:0;position:relative}.home-demo-board{width:100%}.board-demo-overlay{z-index:2;inset:var(--coordinate-gutter);pointer-events:none;position:absolute}.board-demo-reveal{background:rgb(31 67 46/var(--board-overlay-alpha,.82));color:#fff;text-align:center;-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px);border-radius:8px;place-items:center;width:72%;min-height:28%;padding:10px 14px;display:grid;inset:50% auto auto 50%;transform:translate(-50%,-50%)}.board-demo-reveal-question{animation:.4s ease-out both board-reveal-in}.board-demo-reveal-question-fading .board-demo-question{animation:.62s ease-in both board-question-out}.board-demo-reveal-fading{animation:.42s ease-in both board-reveal-out}.home-board-overlay,.introduction-hierarchy-overlay{--board-overlay-alpha:.9}.board-demo-name-content{gap:5px;max-width:100%;font-weight:400;animation:.7s ease-out both board-answer-in;display:grid}.board-demo-question,.board-demo-answer-intro,.board-demo-name-secondary{color:#d7e6db;font-family:var(--font-ui);font-size:clamp(15px,4vw,22px);font-weight:400;line-height:1.15;display:block}.board-demo-name-primary{font-family:var(--font-display);font-size:clamp(20px,5.6vw,34px);font-weight:400;line-height:1.08;display:block}.home-board-overlay :is(.board-demo-question,.board-demo-answer-intro,.board-demo-name-secondary){font-size:var(--home-course-body-size)}@media (width<=680px){.board-demo-reveal{width:74%;padding:8px 10px}}@keyframes board-reveal-in{0%{opacity:0}to{opacity:1}}@keyframes board-answer-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes board-question-out{0%{opacity:1}to{opacity:0}}@keyframes board-reveal-out{0%{opacity:1}to{opacity:0}}.home-current{margin:0 0 var(--space-2)}.home-current>.eyebrow{margin-bottom:12px}@media (width>=681px){.home-current{position:relative}.home-current>.eyebrow{left:0;bottom:calc(100% + var(--space-3));margin:0;position:absolute}}.home-progress-summary{margin-top:var(--space-2);flex-direction:column;gap:12px;display:flex}.home-progress-summary>p:not(.home-progress-description){color:var(--muted);margin:0;font-size:14px}.home-progress-summary strong{color:var(--ink)}.completed-levels{gap:7px;margin:16px 0;display:grid}.completed-level-row{border:0;border-bottom:1px solid var(--line);width:100%;min-height:44px;color:var(--ink);text-align:left;background:0 0;align-items:center;gap:11px;padding:10px 0;display:flex}.completed-level-row:hover{color:#356153}.completed-level-row>span:nth-child(2){flex:1;gap:2px;min-width:0;display:grid}.completed-level-row small{color:var(--muted);font-size:12px}.completed-level-mark{background:var(--green);color:#fff;border-radius:50%;flex-shrink:0;place-items:center;width:22px;height:22px;font-size:12px;display:grid}.view-path-button{justify-content:space-between;width:100%;margin-top:15px;display:flex}.home-optional{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;gap:16px;margin-top:22px;padding-top:15px;font-size:12px;display:flex}.home-optional .text-button{margin:0;padding:7px 0;font-size:12px}.screen-topline{color:var(--muted);justify-content:space-between;align-items:center;gap:12px;margin-top:25px;font-size:13px;display:flex}.learning-path-screen,.level-overview{padding-bottom:40px}.path-intro{text-align:center;max-width:620px;margin:48px auto 32px}.path-intro h1,.level-overview-header h1{font-size:clamp(42px,5vw,64px)}.path-intro p:not(.eyebrow),.level-overview-header>p:not(.eyebrow){color:var(--muted);max-width:520px;margin:20px auto 0;line-height:1.7}.learning-path-list{max-width:760px;margin:0 auto}.path-section-label{color:var(--sage);letter-spacing:2px;margin:28px 0 10px;font-size:11px;font-weight:700}.path-level-row{border-bottom:1px solid var(--line);grid-template-columns:32px minmax(0,1fr) auto;align-items:center;gap:15px;padding:20px 0;display:grid}.path-level-row h2{margin:4px 0;font-size:20px;font-weight:550}.path-level-row p{color:var(--muted);margin:0;font-size:14px;line-height:1.5}.path-level-row .eyebrow{margin:0;font-size:10px}.path-level-row .secondary-button{min-width:120px}.path-marker{width:26px;height:26px;color:var(--muted);border:1px solid #b8c9bd;border-radius:50%;place-items:center;font-size:13px;display:grid}.path-level-row:not(.planned-path-row) .path-marker:first-child{color:var(--green)}.path-status{color:var(--muted);margin-top:7px;font-size:14px;display:inline-block}.planned-path-row{opacity:.65}.level-overview{max-width:820px;margin:0 auto}.level-overview-header{text-align:center;margin:54px auto 30px}.level-overview-header>p:not(.eyebrow){max-width:560px}.overview-status{color:var(--muted);justify-content:center;gap:20px;margin-top:20px;font-size:13px;display:flex}.level-overview-actions{gap:var(--space-3);grid-template-columns:1fr 1fr;max-width:600px;margin:0 auto 44px;display:grid}.level-overview-actions .primary-button{grid-column:1/-1}.overview-content{border-top:1px solid var(--line);padding-top:25px}.overview-opening-list{margin:0;padding:0;list-style:none}.overview-opening-list li{border-bottom:1px solid var(--line);justify-content:space-between;gap:20px;padding:17px 0;display:flex}.overview-opening-list li>div{gap:4px;display:grid}.overview-opening-list span{color:var(--muted);font-size:13px;line-height:1.5}.overview-opening-list code{color:#53665a;white-space:nowrap;font-size:12px}.concept-content{animation:.2s ease-out both concept-in}.concept-content.concept-leaving{animation:.1s ease-in both concept-out}.previous-concept{color:var(--muted);margin:0 0 16px;font-size:13px;line-height:1.5}.onboarding .session-progress{transition:all .3s}.onboarding .session-progress::-webkit-progress-value{transition:width .3s}@keyframes concept-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes concept-out{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-8px)}}@media (prefers-reduced-motion:reduce){.concept-content,.concept-content.concept-leaving{animation:none}.onboarding .session-progress{transition:none}.onboarding .session-progress::-webkit-progress-value{transition:none}}@media (width<=680px){.home-layout{row-gap:var(--space-4);padding-top:var(--space-5);padding-bottom:var(--space-4)}.home-copy h1{letter-spacing:-1.3px;font-size:38px;line-height:1.07}.home-copy .intro{margin-top:var(--space-4);margin-bottom:var(--space-5)}.home-current{margin:var(--space-2) 0 var(--space-2)}.home-progress-summary{margin-top:var(--space-2)}.home-optional{margin-top:var(--space-4)}.free-training{margin-top:var(--space-5)}.home-meta{gap:2px;min-width:0;font-size:10px}.home-meta .quiet-button{white-space:nowrap;min-height:44px}}.collection-options .secondary-button:disabled{opacity:.55;cursor:not-allowed}.app-recovery .secondary-button{margin-top:16px}.review-v2{max-width:54rem;margin-inline:auto}.review-score{font-size:1.8rem;font-weight:600}.review-threshold{color:var(--muted)}.review-v2 .review-skill-item{padding-block:1.5rem;scroll-margin-top:2rem;display:block}.review-skill-results{margin:1rem 0;padding:0;list-style:none}.review-skill-results li{margin-block:.85rem}.review-skill-results p{margin-bottom:.35rem}.review-skill-results [data-correct=false] p{color:#a13b27}.review-v2 .secondary-button{width:auto;max-width:100%}.public-header a{color:var(--ink);text-decoration:none}.public-header .quiet-button{color:var(--muted)}.public-shell main{padding-bottom:3rem}.public-library>h1,.public-opening-hero h1{margin:1.5rem 0 1rem}.public-intro{max-width:55rem;font-size:1.15rem;line-height:1.6}.public-library-group{margin-top:3rem}.public-opening-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;padding:0;list-style:none;display:grid}.public-opening-card{border:1px solid var(--line);border-radius:var(--radius-control);height:100%;color:var(--ink);background:#ffffff70;flex-direction:column;padding:1.4rem;text-decoration:none;display:flex}.public-opening-card:hover{border-color:var(--green)}.public-opening-card h3{margin:0 0 .75rem;font-size:1.25rem}.public-opening-card>span{color:var(--green);margin-top:auto;padding-top:.5rem}.public-card-line,.public-canonical{font-variant-numeric:tabular-nums}.public-card-line{line-height:1.6}.public-breadcrumb{color:var(--muted);margin-top:1.5rem;font-size:.9rem}.public-breadcrumb a{color:var(--muted)}.public-canonical{font-size:1.3rem;font-weight:600;line-height:1.6}.public-learning{margin-block:2.5rem}.public-position{width:100%;min-width:0}.public-position .board-figure{width:100%;margin:0}.public-related{margin-top:2.5rem}.public-conversion{min-width:0;padding-top:.25rem}.public-conversion h2{margin-top:0}.public-conversion p{font-size:1.1rem;line-height:1.6}.public-related ul{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;padding:0;list-style:none;display:grid}.public-related a{border:1px solid var(--line);border-radius:var(--radius-control);height:100%;color:var(--ink);padding:1rem;text-decoration:none;display:block}.public-related a span{margin-top:.75rem;line-height:1.5;display:block}.public-conversion-actions{gap:1rem;margin-top:1.5rem;display:grid}.public-conversion-actions a{text-align:center;justify-content:center;margin:0;text-decoration:none}.public-reassurance{color:var(--muted)}.direct-opening-learn a.primary-button{text-decoration:none}.direct-opening-learn .direct-learn-complete>a{justify-content:center;display:flex}@media (width<=680px){.public-header{flex-wrap:wrap;gap:1rem}.public-header>.quiet-button{margin-left:auto}.public-opening-grid,.public-related ul{grid-template-columns:1fr}.public-learning{margin-block:1.5rem}.public-opening-hero h1{font-size:clamp(2.1rem,9vw,3rem)}}.direct-guide-return{text-align:center}.home-current-scope{border-top:1px solid var(--line);grid-column:1/-1;padding-top:2rem}.current-scope-groups{grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-block:1.5rem;display:grid}.current-scope-groups h3{font-size:16px;font-weight:600}.current-scope-groups ul{padding-left:1.2rem}.current-scope-groups li{margin-block:.45rem}.current-scope-groups a{color:inherit;text-underline-offset:.2em}.notification-signup{border-top:1px solid var(--line);margin-top:2rem;padding-top:1.5rem}.notification-signup h2{font-family:inherit;font-size:1.5rem}.notification-signup form{max-width:44rem}.notification-signup label{margin-bottom:.5rem;font-size:14px;font-weight:600;display:block}.notification-form-row{align-items:stretch;gap:.75rem;display:flex}.notification-form-row input[type=email]{border:1px solid var(--line);width:100%;min-width:0;color:var(--ink);font:inherit;background:#f8f9f5;border-radius:.5rem;flex:1;padding:.8rem}.notification-form-row button{white-space:nowrap;width:auto;min-height:48px}.notification-support{color:var(--muted);font-size:14px}.notification-privacy{max-width:48rem;margin-block:1rem;font-size:14px}.notification-privacy summary{cursor:pointer;min-height:32px}.curriculum-end{border-top:1px solid var(--line);margin-top:2rem;padding-top:2rem}.notification-status .results{max-width:48rem;margin-inline:auto}@media (width<=700px){.current-scope-groups{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=450px){.current-scope-groups{grid-template-columns:1fr}.notification-form-row{flex-direction:column}.notification-form-row button{width:100%}}.keyboard-chessboard{position:relative}.keyboard-board-squares{pointer-events:none;grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);display:grid;position:absolute;inset:0}.keyboard-board-squares button{pointer-events:none;background:0 0;border:0;border-radius:0;width:100%;min-width:0;height:100%;min-height:0;margin:0;padding:0}.keyboard-board-squares button:focus-visible{outline-offset:-4px;background:#f8f9f522;outline:3px solid #9d6516}a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline-offset:3px;outline:3px solid #9d6516}.board-step-scope{overflow-anchor:none}.board-step-scope .training-board{position:static}.public-learning>*{min-width:0}.reconstruction-actions{flex-wrap:wrap;align-items:center;gap:20px;margin:22px 0;display:flex}.reconstruction-actions .secondary-button{flex:0 auto;width:auto}.reconstruction-actions .text-button,.assistance-quiet{font-size:15px}.reconstruction-actions~.finish-session{margin-top:30px}.global-footer{border-top:1px solid var(--line,#d9e0d6);margin-top:64px;padding:30px 0;font-size:15px;display:block}.global-footer nav{flex-wrap:wrap;gap:16px 24px;margin-bottom:30px;display:flex}.global-footer nav a{color:var(--ink,#203c36);text-underline-offset:4px}.global-footer .notification-signup{max-width:640px}.global-footer .notification-privacy{margin-top:16px;font-size:14px}.global-footer .notification-support{font-size:14px}.home-scope-lede{margin:28px 0;font-size:18px;line-height:1.6}.training-picker .collection-options{margin-bottom:36px}.learned-scope-helper{margin-top:12px;font-size:14px;line-height:1.5}@media (width<=680px){.global-footer nav{grid-template-columns:1fr 1fr;gap:16px;display:grid}.public-header .utility-nav{flex-wrap:wrap;gap:12px}.global-footer .notification-form-row{flex-wrap:wrap}.global-footer .notification-form-row input{min-width:0}.question-panel h1+.answers{margin-top:26px}}.public-conversion-actions a>span{gap:.35rem;display:grid}.public-conversion-actions a small{font-size:.92rem;font-weight:400}.learning-journey,.training,.results{overflow-anchor:none}:root{--question-answer-gap:var(--space-5);--heading-action-gap:var(--space-6);--feedback-action-gap:var(--space-4);--completion-action-gap:var(--space-6);--secondary-action-gap:var(--space-5);--content-footer-gap:160px}.question-panel h1+.answers{margin-top:var(--question-answer-gap)}.question-panel h1+.primary-button,.shared-learn .lesson-copy h1+.primary-button{margin-top:var(--heading-action-gap)}.feedback-block+.primary-button,.feedback-block .primary-button{margin-top:var(--feedback-action-gap)}.results>.primary-button{margin-top:var(--completion-action-gap)}.question-panel>.finish-session,.results>.finish-session{margin-top:var(--secondary-action-gap)}.global-footer{margin-top:var(--content-footer-gap);font-weight:400}.global-footer nav a{color:var(--muted);font-size:14px;font-weight:400}.global-footer .notification-signup h2{font-size:1.25rem;font-weight:500;line-height:1.4}.global-footer nav a{align-items:center;min-height:44px;display:inline-flex}.app-diagnostics{margin-top:var(--space-6);color:var(--muted);font-size:.8rem}.opening-group-nav{gap:var(--space-2) var(--space-4);padding-block:var(--space-3);margin-block:var(--space-4);border-block:1px solid var(--line);background:var(--page);flex-wrap:wrap;display:flex}.opening-group-nav-sticky{z-index:3;position:sticky;top:0}.opening-group-nav a{min-height:44px;color:var(--green);text-underline-offset:.2em;align-items:center;display:inline-flex}.public-library-group h2,.current-scope-groups h3{scroll-margin-top:120px}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.reconstruction-board{touch-action:none}@media (width<=680px){:root{--content-footer-gap:80px;--heading-action-gap:var(--space-5);--completion-action-gap:var(--space-5)}.app-shell{padding-inline:max(20px, env(safe-area-inset-left)) max(20px, env(safe-area-inset-right))}.focused-activity .app-header{gap:var(--space-2);min-height:64px;padding-block:max(var(--space-2), env(safe-area-inset-top)) var(--space-2);flex-wrap:nowrap}.focused-activity .app-header .brand{gap:8px;min-width:0;font-size:14px}.focused-activity .header-tools{flex-direction:row;flex:none;width:auto}.focused-activity .utility-nav{display:none}.focused-activity .exit-button{white-space:nowrap;min-height:44px;padding:0;font-size:13px}.focused-activity .level-context{padding-top:var(--space-4)}.focused-activity .journey-progress{padding-block:var(--space-3)}.focused-activity .training{padding-top:var(--space-4)}.focused-activity .session-progress{margin-bottom:var(--space-4)}.focused-activity .training-layout{gap:var(--space-4)}.focused-activity .question-panel h1{overflow-wrap:break-word;font-size:32px;line-height:1.15}.focused-activity .board-figure figcaption{margin-top:var(--space-2)}.focused-activity .finish-session{min-height:44px}.focused-activity{padding-bottom:max(var(--space-4), env(safe-area-inset-bottom))}.opening-group-nav{gap:4px 16px}.global-footer nav{gap:8px 16px}}@media (width<=360px){.focused-activity .app-header .brand-name{white-space:normal;max-width:180px}}.keyboard-board-squares button:focus-visible{outline:3px solid var(--ink);outline-offset:-3px;box-shadow:inset 0 0 0 6px #f8f9f5}@media (width<=680px){.focused-activity .app-header{z-index:10;background:var(--page);position:sticky;top:0}}.comparison-layout{grid-template-areas:"board intro""board choices""board explanation";row-gap:20px}.comparison-introduction{grid-area:intro;min-width:0}.comparison-layout>.comparison-target-list{grid-area:choices;min-width:0;margin-top:0}.comparison-board{grid-area:board;min-width:0}.comparison-explanation{grid-area:explanation;min-width:0}.comparison-layout .contrast-cue{margin-top:0}.comparison-target-list button{overflow-wrap:anywhere}.comparison-target-list button strong{flex-shrink:0}@media (width<=600px){.comparison-layout{grid-template-columns:minmax(0,1fr);grid-template-areas:"intro""choices""board""explanation";display:grid}.comparison-layout>.comparison-target-list{gap:6px}.comparison-layout>.comparison-target-list button{min-height:44px;padding:10px}}.learn-summary .contrast-cue p+p{margin-top:14px}.learn-summary .comparison-instruction{color:var(--ink)}.level-context:has(.level-opening-index){flex-wrap:wrap;align-items:baseline;gap:4px 16px;display:flex}.level-opening-index{letter-spacing:normal;text-transform:none;font-size:14px;font-weight:400}.learn-cumulative-line{border-block:1px solid var(--line);margin:16px 0;padding:12px 0}.learn-cumulative-line .move-sequence{overflow-wrap:anywhere;margin:0;line-height:1.65}.learn-established-move{color:var(--muted)}.learn-revealed-move{color:var(--ink)}.learn-latest-move{text-underline-offset:4px;font-weight:600;text-decoration:underline}.phase-inline-complete{color:var(--green);font-weight:600}.learn-notation-label{color:var(--muted);margin-bottom:4px;font-size:14px;display:block}.learn-cumulative-line>div+div{margin-top:10px}.answer-feedback{align-items:baseline;gap:8px;display:flex}.answer-feedback svg{flex:0 0 20px;align-self:center}.feedback-declined{color:var(--ink,#203b35)}.board-feedback:not(:empty){margin-top:14px}.board-feedback .feedback-label{margin:0}.guided-practice-v2 .reconstruction-actions{gap:12px 20px}.home-course-entry{margin-top:var(--space-4)}.home-course-entry h2{margin:0 0 12px;font-size:22px;line-height:1.35}.home-course-entry>p{font-size:var(--home-course-body-size);margin:0 0 20px;line-height:1.6}.home-course-entry .primary-button{width:100%}.home-layout>.home-alternatives{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.25rem;display:grid}.home-alternative{color:var(--ink);flex-direction:column;gap:12px;font-size:14px;font-weight:400;line-height:1.6;display:flex}.home-alternative h2,.home-progress-summary h2{margin:0;font-size:22px;font-weight:700;line-height:1.35}.home-alternative p{margin:0}.home-alternative .secondary-button{justify-content:space-between;align-items:center;width:100%;margin-top:auto;display:flex}.home-alternative .secondary-button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.home-notification-link{color:var(--muted);text-underline-offset:3px}.home-notification-link:focus-visible{outline:2px solid var(--green);outline-offset:3px}@media (width<=760px){.home-layout>.home-alternatives{grid-template-columns:1fr}}.home-layout{--home-card-padding:20px;--home-card-border:1px;--home-course-body-size:16px}.home-course-entry,.home-alternative,.home-progress-summary{border:var(--home-card-border) solid var(--line);padding:var(--home-card-padding);background:var(--card);border-radius:14px}.home-layout>.home-benchmark-graph{grid-column:1/-1;min-width:0}.home-benchmark-graph .benchmark-series{margin:0}.benchmark-empty{text-align:center;min-height:200px;color:var(--muted);justify-content:center;align-items:center;padding:24px;display:flex}.catalogue-notification{margin:12px 0 24px;line-height:1.6}.catalogue-notification>p{margin:0;display:inline}.catalogue-notification>p:after{content:" "}.home-notification-link{font:400 14px/1.6 var(--font-ui);cursor:pointer;text-underline-offset:3px;background:0 0;border:0;padding:0;text-decoration:underline}.baseline-note{color:var(--muted);margin-top:.35rem;font-size:.85em;display:block}.home-layout>.home-demo{width:100%;max-width:none}@media (width>=761px){.home-layout{column-gap:var(--space-6);row-gap:var(--space-6);grid-template-columns:repeat(2,minmax(0,1fr))}.home-layout>.home-demo{margin-bottom:var(--home-why-height,0px);align-self:end}.home-layout>.home-alternatives{gap:var(--space-6)}.home-copy h1{margin-bottom:var(--space-5)}}.home-score-chart{border-top:1px solid var(--line);min-width:0;padding-top:24px}.home-score-chart h2{margin:0 0 12px}.home-chart-legend{min-height:20px;color:var(--ink);gap:20px;font-size:14px;display:flex}.home-chart-plot{height:258px;position:relative}.home-chart-plot svg{width:100%;height:258px;display:block;overflow:visible}.home-chart-plot text{fill:var(--muted);font-family:inherit;font-size:13px}.home-chart-plot .home-chart-latest{fill:var(--ink);font-size:14px}.home-chart-plot .actual-line,.home-chart-plot .trend-line{stroke-width:2px}.home-chart-empty{text-align:center;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:8px;font-size:14px;display:flex;position:absolute;inset:55px 15px 55px 55px}.home-chart-future{text-align:right;max-width:44%;color:var(--muted);font-size:14px;line-height:16px;position:absolute;top:228px;right:12px;transform:translateY(-50%)}.home-chart-empty span{background:#f8f9f5;padding:0 4px}.home-chart-date{font-variant-numeric:tabular-nums}.home-demo .board-frame{border-radius:12px}.home-latest-result{font-variant-numeric:tabular-nums;flex-wrap:wrap;justify-content:space-between;gap:4px 16px;font-size:14px;display:flex}@media (width>=761px){.home-layout>.home-alternatives{row-gap:12px}.home-alternative{grid-template-rows:subgrid;grid-row:span 4;gap:12px;display:grid}.home-alternative .secondary-button{align-self:end;margin-top:0}}.home-recent-results{color:var(--muted);font-variant-numeric:tabular-nums;align-self:start;font-size:14px}.home-recent-results ul{gap:4px;margin:0;padding:0;list-style:none;display:grid}.home-history-toggle{color:inherit;font:inherit;text-align:left;text-underline-offset:3px;background:0 0;border:0;padding:6px 0;text-decoration:underline;display:block}h1,.question-panel h1,.home-copy h1,.results h1,.utility-page h1{letter-spacing:0}.paired-navigation{grid-template-columns:1fr 1fr;gap:16px;margin-top:40px;display:grid}.paired-navigation .text-button{text-align:center;color:var(--muted);justify-self:center;margin:0;font-size:14px;font-weight:400;text-decoration:none}.home-optional.home-introduction{padding:24px 0;display:block}.home-introduction h2{margin:0 0 12px;font-size:22px}.home-introduction p{margin:0 0 16px}.train-entry{max-width:58rem;margin-inline:auto}.train-entry>ul{padding-left:24px;line-height:1.7}.train-entry>ul li{margin-block:10px}.public-conversion-actions .primary-button{text-align:center;justify-content:center;padding-inline:44px;position:relative}.public-conversion-actions .primary-button>[aria-hidden]{position:absolute;right:18px}.opening-card-action{align-items:center;gap:10px;display:flex}.opening-card-action>[aria-hidden]{flex-shrink:0}@media (width<=600px){.paired-navigation{grid-template-columns:1fr;gap:20px}}.home-layout>.home-optional.home-introduction{grid-column:1/-1;font-size:14px}.coffee-support{border-top:1px solid var(--line);text-align:left;width:100%;margin-top:36px;padding:24px}.coffee-support h2{margin:0 0 12px;font-size:20px}.coffee-support p{margin:0 0 16px;line-height:1.6}.coffee-support .text-button{margin:0}.home-layout>.home-progress-summary{grid-column:1/-1}.home-progress-summary>.home-progress-description{color:var(--ink);font-size:inherit;line-height:1.6}.coffee-support-compact{margin-top:24px;padding:20px 0 0}.global-footer .coffee-support{color:var(--muted);font-size:14px}.global-footer .coffee-support p{max-width:52rem}.global-footer .coffee-support .text-button{font-size:inherit}.coffee-dialog{box-sizing:border-box;border:1px solid var(--line);border-radius:var(--radius-control);background:var(--paper,#f7f8f2);width:min(480px,100% - 32px);max-height:calc(100dvh - 32px);color:var(--ink);text-align:left;margin:auto;padding:28px;overflow-y:auto}.coffee-dialog[open]{display:block}.coffee-dialog h2{margin:0 0 16px;font-family:Georgia,serif;font-size:28px;font-weight:400}.coffee-dialog p{margin:0 0 24px;font-size:16px;line-height:1.6}.coffee-dialog .primary-button{width:100%;min-height:48px;margin:0;padding:14px 20px}.coffee-dialog::backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#1b2e2838}:is(html:has(.coffee-dialog[open]),body:has(.coffee-dialog[open])){overflow:hidden}.home-progress-summary .view-path-button{align-self:flex-start;width:calc(50% - .625rem);max-width:100%;margin-top:4px}@media (width<=760px){.home-progress-summary .view-path-button{width:100%}}.home-info-card .secondary-button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.introduction-next-step{gap:16px;margin-top:24px;display:grid}.introduction-next-step h2,.introduction-next-step p{margin:0}.board-surface [data-column=c],.board-surface [data-column=d]{--board-grain-x:33.3333%}.board-surface [data-column=e],.board-surface [data-column=f]{--board-grain-x:66.6667%}.board-surface [data-column=g],.board-surface [data-column=h]{--board-grain-x:100%}.board-surface [data-row="6"],.board-surface [data-row="5"],.board-surface [data-row="2"],.board-surface [data-row="1"]{--board-grain-y:100%}.board-surface [data-square]{background-position:var(--board-grain-x,0%) var(--board-grain-y,0%)}.home-layout>.home-info-card{grid-column:1/-1}.home-info-card.home-progress-summary,.home-info-card.home-introduction{border:var(--home-card-border) solid var(--line);padding:var(--home-card-padding);background:var(--card);margin-top:var(--space-2);border-radius:14px;grid-template-columns:minmax(0,1fr);gap:16px;font-size:14px;display:grid}.home-info-card h2{margin:0 0 12px;font-size:22px;font-weight:700;line-height:1.35}.home-info-card .home-info-description{color:var(--ink);margin:0 0 12px;line-height:1.6}.home-info-card .home-info-copy>p:last-child{margin-bottom:0}.home-info-copy>p:not(.home-info-description){color:var(--muted)}.home-info-action{width:calc((100% - var(--space-6) - 2 * (var(--home-card-padding) + var(--home-card-border))) / 2);justify-self:end}.home-info-card .view-path-button{width:100%;margin:0}.coffee-support-row{flex-wrap:wrap;align-items:baseline;gap:12px clamp(48px,5vw,96px);display:flex}.coffee-support-row>p{max-width:none;margin:0}.coffee-support-row>.text-button{flex-shrink:0;margin:0}.coffee-support{font-size:14px}@media (width<=760px){.home-info-card.home-progress-summary,.home-info-card.home-introduction{grid-template-columns:minmax(0,1fr);gap:20px}.home-info-action{justify-self:stretch;width:100%}.coffee-support-row{gap:12px clamp(48px,5vw,96px)}}.introduction-progress{background:var(--line);border-radius:5px;height:3px;margin:12px 0 36px;display:block;position:relative}.introduction-progress-fill{border-radius:inherit;background:var(--sage);height:100%;display:block;position:relative}.introduction-progress-animate .introduction-progress-fill{transition:width 1.2s}.introduction-progress-start,.introduction-progress-end{background:var(--sage);border-radius:50%;position:absolute;top:50%;transform:translate(-50%,-50%)}.introduction-progress-start{width:20px;height:20px;left:0}.introduction-progress-end{width:20px;height:20px;left:100%}.introduction-hierarchy-overlay .board-demo-name-content{animation:none}.introduction-hierarchy-overlay.board-demo-reveal-in{animation:.2s ease-out both board-reveal-in}.introduction-hierarchy-overlay.board-demo-reveal-out{animation:.2s ease-in both board-reveal-out}@media (prefers-reduced-motion:reduce){.introduction-progress-fill{transition:none!important}.introduction-hierarchy-overlay{animation:none!important}}.home-info-card h2{color:var(--ink)}.home-info-action>.secondary-button{justify-content:space-between;align-items:center;width:100%;margin:0;display:flex}.board-figure .board-repeat-button{font:400 14px var(--font-ui);color:inherit;background:0 0;border:0;padding:0;text-decoration:underline}.board-figure figcaption{gap:20px}.introduction-row-reveal,.introduction-card-reveal{animation:.3s ease-out both intro-reveal}@keyframes intro-reveal{0%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion:reduce){.introduction-row-reveal,.introduction-card-reveal{animation:none}}.earned-phase .earned-marker,.phase-inline-complete.earned-phase{animation:.28s ease-out earned-phase}.earned-level h1,.earned-level>.primary-button,.journey-progress.earned-level .finished-stage:last-child span{animation:.6s ease-out earned-settle}.earned-course h1,.earned-course .curriculum-end h2,.journey-progress.earned-course .finished-stage:last-child span{animation:.9s ease-out earned-glow}@keyframes earned-phase{0%{opacity:.6}to{opacity:1}}@keyframes earned-settle{0%{opacity:.35;transform:translateY(3px)}to{opacity:1;transform:none}}@keyframes earned-glow{40%{text-shadow:0 0 14px #bda55d55}}.earned-score-segment{stroke-dasharray:1;animation:.4s ease-out earned-segment}.earned-score-point{animation:.4s ease-out earned-point}.earned-score-label{animation:.4s ease-out earned-label}@keyframes earned-segment{0%{stroke-dashoffset:1px}to{stroke-dashoffset:0}}@keyframes earned-point{0%{opacity:0}50%{opacity:0}to{opacity:1}}@keyframes earned-label{0%{opacity:0}65%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion:reduce){.earned-phase,.earned-phase span,.earned-level h1,.earned-level>.primary-button,.earned-level span,.earned-course h1,.earned-course h2,.earned-course span,.earned-score-segment,.earned-score-point,.earned-score-label{animation:none!important}}.earned-phase-action .primary-button{animation:.28s ease-out earned-phase}@media (prefers-reduced-motion:reduce){.earned-phase-action .primary-button{animation:none}}.onboarding .concept-content{animation:.2s ease-out both intro-reveal}.onboarding .concept-content.concept-leaving{animation:.1s ease-in both intro-leave}@keyframes intro-leave{0%{opacity:1}to{opacity:0}}@media (prefers-reduced-motion:reduce){.onboarding .concept-content,.onboarding .concept-content.concept-leaving{animation:none}}.board-surface{position:relative}.board-repeat-snapshot{z-index:30;pointer-events:none;opacity:1;width:100%;height:100%;transition:opacity .22s;position:absolute;inset:0}@media (prefers-reduced-motion:reduce){.board-repeat-snapshot{display:none}.board-surface [data-piece][style*=transform]{transition:none!important}}.home-copy h1{letter-spacing:-2px}@media (width<=760px){.home-copy h1{letter-spacing:-1.6px}}@media (width<=480px){.home-copy h1{letter-spacing:-1.3px}}.tier-selector{border-bottom:1px solid var(--line);grid-template-columns:repeat(4,minmax(0,1fr));margin:20px 0 12px;display:grid}.tier-selector button{min-height:44px;color:var(--muted);background:0 0;border:0;border-bottom:3px solid #0000;padding:10px 2px;font-size:14px;font-weight:600}.tier-selector button:hover{background:var(--sage-surface)}.tier-selector button[aria-pressed=true]{background:var(--sage-surface);color:var(--green);border-bottom-color:var(--green)}.tier-status{color:var(--ink);font-size:14px;font-weight:600}.tier-panel>p{color:var(--muted);margin:4px 0 12px;font-size:14px;font-weight:400;line-height:1.6}.tier-panels-reserved{display:grid}.tier-panels-reserved>.tier-panel{flex-direction:column;grid-area:1/1;min-width:0;display:flex}.tier-panel[inert]{visibility:hidden}.home-tier-action{place-items:center start;min-height:54px;margin-top:auto;display:grid}.home-tier-action .home-notification-link{text-align:left}.home-copy h1 em{color:var(--sage)}.current-scope-tiers{border-top:1px solid var(--line)}.current-scope-tiers>*{border-bottom:1px solid var(--line)}.home-current-scope>h2{font-size:24px;font-weight:700}.scope-tier-row{grid-template-columns:9rem 10rem minmax(0,1fr);align-content:center;gap:4px 12px;min-height:78px;padding:12px 16px;line-height:1.6;display:grid;position:relative}summary.scope-tier-row{cursor:pointer;padding-right:36px;list-style:none}summary.scope-tier-row::-webkit-details-marker{display:none}.current-scope-tiers>details[open]{background:var(--card)}.current-scope-tiers .current-scope-groups{margin:0;padding:16px}summary.scope-tier-row:focus-visible{outline:2px solid var(--green);outline-offset:-2px}.scope-range,.scope-count,.scope-description{color:var(--muted);font-size:14px}.scope-description{grid-column:1/-1}.scope-chevron{border:solid var(--muted);border-width:0 1.5px 1.5px 0;width:8px;height:8px;position:absolute;top:50%;right:16px;transform:translateY(-65%)rotate(45deg)}details[open]>summary .scope-chevron{transform:translateY(-35%)rotate(225deg)}.current-scope-groups a{font-size:14px;font-weight:400}@media (width>=701px){.current-scope-groups.scope-medium{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=560px){.scope-tier-row{grid-template-columns:repeat(3,minmax(0,auto));min-height:96px}}.comparison-subgroup{display:contents}.comparison-subgroup h2{margin:12px 0 0;font-size:18px}.comparison-subgroup>h2{grid-column:1/-1;margin:.5rem 0 0;font-size:1rem}.course-progress-summary{color:var(--muted);font-size:14px}.course-progress-row{flex-wrap:wrap;justify-content:space-between;gap:6px 16px;display:flex}.course-progress-row strong{color:var(--ink)}.course-progress-summary .session-progress{height:5px;margin:8px 0 0}.course-progress-with-tiers{border-block:1px solid var(--line);max-width:760px;margin:0 auto 28px;padding:14px 0}.course-progress-with-tiers .session-progress{margin-bottom:10px}.learning-journey>.guided-practice-v2,.learning-journey>.board-step-scope>.shared-learn{padding-top:14px}.learning-journey :is(.shared-learn,.guided-practice-v2)>:is(.session-progress,.introduction-progress){margin-bottom:24px}.lesson-copy p+:is(.orientation-list,.named-opening-list){margin-top:12px}.contrast-cue h3{font-size:inherit;margin:12px 0 8px}.results .primary-button+.secondary-button{margin-top:18px}.assistance-quiet{min-height:44px}.assistance-quiet:focus-visible{outline-offset:3px;outline:3px solid #ba8029}.passive-piece-grid{aspect-ratio:1;border-radius:3px;grid-template:repeat(8,1fr)/repeat(8,1fr);display:grid;position:relative;overflow:hidden}.passive-board-piece{width:12.5%;height:12.5%;position:absolute;inset:0 auto auto 0}.stable-input-board{position:relative}.piece-input-layer{z-index:1;pointer-events:none;position:absolute;inset:0}.stable-input-board [data-square] .board-piece-image{opacity:0}.home-headline-ending{white-space:nowrap}.home-why{--home-why-inset:calc(var(--home-card-padding) + var(--home-card-border));position:relative}.home-why-toggle,.home-why-text{font-family:var(--font-ui);font-size:14px;font-weight:400}.home-why-toggle{min-height:44px;margin-block-start:8px;margin-inline:auto var(--home-why-inset);color:var(--muted);text-align:left;background:0 0;border:0;align-items:center;gap:9px;padding:0;line-height:1.45;display:flex}.home-why-toggle svg{flex:none}.home-why-toggle[aria-expanded=true] svg{transform:rotate(180deg)}.home-why-text{padding-inline-end:var(--home-why-inset);line-height:1.6}.home-why-text p{margin:0}.home-why-text p+p{margin-top:16px}@media (width>=761px){@container (width>=470px){.home-why{--home-why-inset:8px}.home-why-toggle{top:-62px;right:var(--home-why-inset);margin:0;position:absolute}.home-why-text{padding-bottom:var(--space-4)}.home-copy .home-course-entry{margin-top:0}}}