.anonymous-fretboard{width:240px;min-width:0;max-width:100%;margin:0 auto}.anonymous-fretboard-neck{background:var(--paper);border-block:1px solid var(--line);height:228px;position:relative}.anonymous-fretboard-lines{pointer-events:none;position:absolute;inset:0}.anonymous-fretboard-fret{stroke:#b7c0b1;stroke-width:2px}.anonymous-fretboard-string{stroke:#b6bdb3}.anonymous-fretboard-string.is-active{stroke:#647361}.anonymous-fretboard-note{border-radius:50%;place-items:center;width:32px;height:32px;font-size:18px;font-weight:700;line-height:1;display:grid;position:absolute;transform:translate(-50%,-50%)}.anonymous-fretboard-note.is-source{color:var(--paper);background:var(--green)}.anonymous-fretboard-note.is-question{color:var(--target-ink);background:var(--target-bg);border:1px solid #b99c63}.anonymous-fretboard-note.is-answered{color:var(--green);background:var(--soft);border-color:var(--green)}.anonymous-fretboard-caption{color:var(--muted);font-size:var(--small);justify-content:space-between;gap:12px;padding-top:8px;display:flex}.note-answer{outline:none;width:100%;min-width:0}.note-answer:focus-visible{outline:none}.note-answer-grid{grid-template-columns:repeat(7,minmax(0,1fr));gap:7px;display:grid}.note-answer-grid button{border-radius:var(--radius-small);background:var(--paper);min-width:0;min-height:52px;color:var(--green);border:1px solid #a7b89a;flex-direction:column;justify-content:center;align-items:center;padding:6px 2px;font-size:21px;font-weight:600;display:flex}.note-answer-grid button small{font-size:12px;font-weight:500}.note-answer-grid button.is-accidental{background:#f4f5ee;font-size:17px}.note-answer-grid button:hover:not(:disabled){background:var(--soft);border-color:var(--green)}.note-answer-grid button:disabled{opacity:1}.note-answer-grid button.is-selected{outline:3px solid var(--green);outline-offset:1px;background:#e9f4ef}.note-answer-grid button.is-correct{background:var(--green);color:#fff}.note-answer-grid button.is-revealed{background:var(--target-bg);color:var(--target-ink)}.note-answer-grid button.is-wrong{background:var(--error-bg);color:var(--error-ink)}.note-answer-confirm{justify-content:space-between;align-items:center;gap:12px;margin-top:14px;display:flex}.note-answer-confirm p{color:var(--green);font-size:14px}.note-answer-confirm p span{color:var(--muted);margin-top:3px;font-size:12px;display:block}@container app (width<=660px){.note-answer-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}.note-answer-grid.has-accidentals button{grid-column:var(--mobile-column);grid-row:var(--mobile-row)}.note-answer-grid button{min-height:48px;font-size:19px}.note-answer-grid button.is-accidental{font-size:15px}.note-answer-confirm{align-items:flex-start;gap:8px}}.theory-intro,.theory-exercise,.theory-result{max-width:900px}.theory-intro{padding:24px}.theory-guide-content h2{margin-bottom:10px;font-size:19px}.theory-guide-content h3{margin:22px 0 10px;font-size:16px}.theory-guide-content p{font-size:15px}.theory-sequences{gap:10px;margin:18px 0;display:grid}.theory-sequences p{flex-wrap:wrap;align-items:center;gap:8px 18px;display:flex}.theory-sequences p>span{width:85px;color:var(--muted);font-size:13px}.theory-sequences strong{word-spacing:8px;color:var(--green);font-size:22px}.theory-note-map{border:1px solid var(--line);border-radius:var(--radius-small);grid-template-columns:repeat(7,minmax(0,1fr));max-width:490px;margin-block:16px 12px;display:grid}.theory-note-map>span{justify-items:center;gap:4px;padding:12px 2px;display:grid}.theory-note-map>span+span{border-left:1px solid var(--line)}.theory-note-map strong{color:var(--green);font-size:20px}.theory-distance-rules{border-radius:var(--radius-small);background:var(--soft);gap:10px;margin:18px 0;padding:16px;display:grid}.theory-distance-rules p{flex-wrap:wrap;justify-content:space-between;gap:6px 20px;display:flex}.theory-distance-rules span{color:var(--muted)}.theory-start{border-top:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:20px;padding-top:20px;display:flex}.theory-start p{color:var(--muted);font-size:13px}.theory-question-body{justify-items:center;gap:20px;margin:24px 0 6px;display:grid}.theory-prompt{justify-content:center;align-items:center;gap:28px;min-height:128px;display:flex}.theory-prompt>strong,.theory-unknown{font-size:54px;font-weight:600;line-height:1.2}.theory-prompt>strong{color:var(--green)}.theory-unknown{color:var(--target-ink)}.theory-prompt-arrow{color:var(--muted);font-size:26px}.theory-prompt.is-sequence{gap:24px}.theory-prompt.is-sequence .theory-prompt-arrow{font-size:36px}.theory-prompt.is-ascending .theory-prompt-source,.theory-prompt.is-descending .theory-prompt-target{transform:translateY(14px)}.theory-prompt.is-ascending .theory-prompt-target,.theory-prompt.is-descending .theory-prompt-source{transform:translateY(-14px)}.theory-prompt-target.is-correct{color:var(--green)}.theory-answer-area{width:100%;max-width:560px}.theory-choices{grid-template-columns:repeat(7,minmax(0,1fr));gap:8px;display:grid}.theory-choices button{border-radius:var(--radius-small);background:var(--paper);min-width:0;min-height:52px;color:var(--green);border:1px solid #a7b89a;padding:8px 2px;font-size:22px;font-weight:600;position:relative}.theory-choices button:hover:not(:disabled){background:var(--soft);border-color:var(--green)}.theory-choices button:disabled{opacity:1;cursor:default}.theory-choices button small{font-size:11px;position:absolute;top:1px;right:4px}.theory-choices .answer-correct{color:#fff;background:var(--green);border-color:var(--green)}.theory-choices .answer-revealed{color:var(--target-ink);background:var(--target-bg);border-color:#ba9143}.theory-choices .answer-wrong{color:var(--error-ink);background:var(--error-bg);border-color:#bc8d7a}.theory-keyboard-tip{color:var(--muted);text-align:center;margin-top:10px;font-size:13px}.theory-hint{border-radius:var(--radius-small);color:#66552c;background:#f5f1df;margin-top:18px;padding:16px}.theory-hint>p{font-size:14px}.theory-hint>p+p{margin-top:6px}.theory-result h2{scroll-margin-top:82px}@container app (width>=760px){.theory-question-body.is-neighbor{grid-template-columns:minmax(240px,.8fr) minmax(0,1.3fr);align-items:center}}@container app (width<=660px){.theory-intro{padding:18px 16px}.theory-sequences p{gap:3px;display:grid}.theory-sequences strong{word-spacing:4px;font-size:20px}.theory-start{flex-direction:column;align-items:stretch}.theory-prompt{gap:20px;min-height:100px}.theory-prompt>strong,.theory-unknown{font-size:46px}.theory-choices{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}.theory-question-body{gap:18px;margin-top:18px}.theory-hint .theory-sequences strong{word-spacing:1px}}.theory-choices button.answer-pending{outline:3px solid var(--accent,#285b4c);outline-offset:2px;color:#173f33;background:#e9f4ef}.theory-choices button:has(.theory-initial-key){padding-bottom:23px}.theory-choices .theory-initial-key{opacity:.8;font-size:12px;font-weight:500;inset:auto 0 3px}.same-string-intro{max-width:920px;padding:24px}.same-string-intro>p{margin-top:12px}.same-string-intro .lesson-start-actions{margin-top:22px}.same-string-question{grid-template-columns:minmax(0,1fr);justify-items:center;gap:24px;min-width:0;margin-top:24px;display:grid}.same-string-board{min-width:0;max-width:100%;margin:0}.same-string-neck{background:var(--paper);border-block:1px solid var(--line);height:228px;position:relative}.same-string-lines{pointer-events:none;position:absolute;inset:0}.same-string-fret{stroke:#b7c0b1;stroke-width:2px}.same-string-string{stroke:#b6bdb3}.same-string-string.is-active{stroke:#647361}.same-string-marker{border-radius:50%;place-items:center;width:30px;height:30px;font-size:15px;font-weight:700;line-height:1;display:grid;position:absolute;transform:translate(-50%,-50%)}.same-string-marker.is-source{color:#fff;background:var(--green)}.same-string-marker.is-target{color:var(--target-ink);background:var(--target-bg);border:1px solid #b99c63}.same-string-marker.is-current{outline-offset:3px;outline:2px solid #9a6a20}.same-string-marker.is-solved{color:var(--green);background:var(--soft);border:1px solid var(--green)}.same-string-board figcaption{color:var(--muted);justify-content:space-between;gap:12px;margin-top:8px;font-size:13px;display:flex}.same-string-answer{width:100%;min-width:0;max-width:660px}.same-string-answer-title{margin-bottom:10px;font-weight:600}.same-string-entry{gap:8px;display:flex}.same-string-entry input{border-radius:var(--radius-small);background:var(--paper);border:1px solid #a7b89a;flex:1;min-width:0;min-height:46px;padding:8px 12px;font-size:18px}.same-string-input-tip{color:var(--muted);margin:8px 0 14px;font-size:13px}.same-string-choices{grid-template-columns:repeat(6,minmax(0,1fr));gap:7px;display:grid}.same-string-choices button{border-radius:var(--radius-small);min-width:0;min-height:56px;color:var(--green);background:var(--paper);border:1px solid #a7b89a;align-content:center;justify-items:center;gap:1px;display:grid}.same-string-choices button:hover:not(:disabled){background:var(--soft);border-color:var(--green)}.same-string-choices strong{font-size:19px}.same-string-choices small{color:var(--muted);font-size:12px}.same-string-choices button.is-wrong{color:var(--error-ink);background:var(--error-bg);border-color:#bc8d7a}.same-string-steps{flex-wrap:wrap;gap:8px;margin-bottom:16px;display:flex}.same-string-steps>span{border:1px solid var(--line);border-radius:var(--radius-small);color:var(--muted);padding:5px 10px;font-size:13px}.same-string-steps .is-current{background:var(--target-bg);color:var(--target-ink);border-color:#b99c63}.same-string-steps .is-done{background:var(--soft);color:var(--green);border-color:#a7b89a}.same-string-note-score strong{color:var(--green);margin-left:8px}.natural-sequence{width:100%;min-width:0;max-width:600px;margin:0}.natural-sequence-notes{align-items:center;gap:8px;padding:50px 2px;display:grid}.natural-sequence-notes>span{border-radius:var(--radius-small);min-width:0;min-height:48px;color:var(--target-ink);background:var(--target-bg);place-items:center;font-size:27px;font-weight:600;display:grid;position:relative}.natural-sequence-notes .is-source{color:var(--green);background:var(--soft)}.natural-sequence-notes .is-current{outline-offset:2px;outline:2px solid #9a6a20}.natural-sequence-notes .is-done{color:var(--green);background:var(--soft)}.natural-sequence-notes small{color:var(--muted);white-space:nowrap;font-size:12px;position:absolute;top:calc(100% + 5px)}.natural-sequence figcaption{text-align:center;color:var(--muted);font-size:13px}@container app (width<=660px){.same-string-intro{padding:18px 16px}.same-string-choices{grid-template-columns:repeat(4,minmax(0,1fr))}.same-string-question{gap:20px;margin-top:18px}}:root{font-synthesis:none;color:#25392f;--green:#285344;--green-hover:#1d4135;--ink:#25392f;--muted:#606d61;--line:#d9dfd3;--paper:#fffefa;--soft:#edf2e7;--target-bg:#f1dfb7;--target-ink:#644b1d;--error-bg:#fcf0eb;--error-ink:#913f2e;--radius:8px;--radius-small:5px;--body:15px;--small:13px;--caption:12px;background:#f4f5ef;font-family:Noto Sans KR,Malgun Gothic,system-ui,sans-serif;font-size:16px;font-weight:400;line-height:1.65}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,select{touch-action:manipulation;-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}button:disabled{cursor:default}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h1{letter-spacing:-.9px;text-wrap:balance;font-size:clamp(26px,2.6vw,32px);font-weight:700;line-height:1.4}h2{letter-spacing:-.5px;font-size:20px;font-weight:700;line-height:1.5}p{word-break:keep-all;overflow-wrap:anywhere;line-height:1.75}svg{vertical-align:middle;flex-shrink:0}em{color:var(--green);font-style:normal;font-weight:700}button,a,input,select{outline-offset:3px}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid #9a6a20}.muted{color:var(--muted)}.text-small{font-size:var(--small)}.eyebrow{color:var(--muted);font-size:var(--caption);margin-bottom:7px;font-weight:600;display:block}.scope-tag,.progress-number,.big-score,.history-score,.result-line strong,.check-progress,.all-controls strong,.comparison{font-variant-numeric:tabular-nums}.app-display{background:#f4f5ef;width:100%;margin-inline:auto;container:app/inline-size}.app-display[data-display=mobile]{max-width:430px;box-shadow:0 0 0 1px var(--line), 0 8px 40px #25392f0d}.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-header{border-bottom:1px solid var(--line);background:#fdfdf8;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:28px;min-height:76px;padding:12px 36px;display:grid}.brand{letter-spacing:-.8px;white-space:nowrap;align-items:center;gap:10px;font-size:21px;font-weight:800;display:flex}.brand-mark{color:#f2d99e;background:var(--green);border-radius:7px;place-items:center;width:36px;height:38px;display:grid}.app-nav{flex-wrap:wrap;gap:6px;min-width:0;display:flex}.app-nav a{color:#596858;white-space:nowrap;border-radius:6px;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:10px 14px;font-size:14px;font-weight:500;display:flex}.app-nav a:hover{background:#eff2e8}.app-nav a.active{color:#234f3d;background:#e5eddd;font-weight:700;box-shadow:inset 0 -2px #285344}.header-meta{color:var(--muted);white-space:nowrap;justify-items:end;gap:2px;font-size:12px;display:grid}.header-tools{justify-content:flex-end;align-items:center;gap:18px;min-width:0;display:flex}.display-switch{border:1px solid var(--line);border-radius:var(--radius);background:var(--soft);flex-shrink:0;gap:2px;padding:3px;display:inline-flex}.display-switch button{border-radius:var(--radius-small);min-width:48px;min-height:44px;color:var(--muted);background:0 0;border:0;padding:7px 11px;font-size:13px;font-weight:600}.display-switch button[aria-pressed=true]{color:#fff;background:var(--green)}.display-switch button:hover:not([aria-pressed=true]){color:var(--green);background:#dfe9d7}.touch-help{display:none}.local-note{align-items:center;gap:6px;font-size:12px;line-height:1.6;display:flex}.status-dot{background:#567747;border-radius:50%;flex-shrink:0;width:5px;height:5px}.workspace{flex-direction:column;flex:1;width:100%;min-width:0;display:flex}main{flex:1;width:100%;min-width:0;margin:0 auto;padding:30px 36px 32px}main:focus{outline:none}.page-intro{margin-bottom:24px}.page-intro p{color:var(--muted);font-size:var(--body);max-width:70ch;margin-top:8px}.skip-link{z-index:100;border:1px solid var(--green);background:#fff;border-radius:5px;padding:12px 18px;position:fixed;top:-100px;left:12px}.skip-link:focus{top:10px}.button{text-align:center;border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;gap:10px;min-height:44px;padding:10px 18px;font-size:14px;font-weight:600;line-height:1.6;transition:background .15s,border-color .15s;display:inline-flex}.primary{color:#fff;background:var(--green);border-color:var(--green)}.primary:hover:not(:disabled){background:var(--green-hover);border-color:var(--green-hover)}.secondary{background:var(--paper);color:#28513e;border-color:#aebda6}.secondary:hover:not(:disabled){background:#edf3e5;border-color:#7c9870}.quiet{color:#53674e;background:0 0}.quiet:hover:not(:disabled){background:#eaf0e2}.button:disabled{color:#77816e;opacity:1;background:#e8ebdf;border-color:#dce2d2}.button.small{min-height:44px;padding:8px 12px;font-size:13px}.text-link{color:#2f5a41;background:0 0;border:0;align-items:center;gap:9px;min-height:40px;padding:6px 0;font-size:14px;font-weight:600;line-height:1.6;display:inline-flex}.text-link:hover{text-underline-offset:4px;text-decoration:underline}.pill{color:#425b34;background:#e1ead5;border-radius:4px;align-items:center;gap:6px;padding:4px 9px;font-size:12px;font-weight:600;display:inline-flex}.muted-pill{color:#5c6c4f;background:#eef1e5}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);min-width:0}.section-heading{justify-content:space-between;align-items:center;gap:16px;display:flex}.section-heading>.muted{font-size:13px}.scope-tag{color:#536646;flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;line-height:1.7;display:inline-flex}.scope-tag>span{background:#637c4c;border-radius:50%;flex-shrink:0;width:4px;height:4px}.action-row{justify-content:space-between;align-items:center;gap:14px;margin-top:20px;display:flex}.bottom-tip{text-align:center;max-width:70ch;color:var(--muted);margin:18px auto 0;font-size:13px}.lesson-card{border-radius:var(--radius);background:#edf2e4;border:1px solid #d1dcc4;padding:24px;overflow:hidden}.card-kicker{justify-content:space-between;align-items:center;gap:12px;display:flex}.card-kicker>.muted{align-items:center;gap:6px;font-size:12px;display:flex}.lesson-card h2{letter-spacing:-1px;margin-top:19px;font-size:30px;line-height:1.35}.lesson-card-copy{color:#586c4b;margin-top:10px;font-size:15px;line-height:1.8}.card-foot{border-top:1px solid #cdd9c0;justify-content:space-between;align-items:center;gap:18px;margin-top:20px;padding-top:18px;display:flex}.card-foot>div{flex-direction:column;gap:4px;display:flex}.card-foot .text-small{color:#576b49;font-size:12px}.card-foot .button{flex-shrink:0}.home-board{pointer-events:none;margin:16px -8px -8px}.home-board .fretboard-scroll{background:0 0;border:0;overflow:hidden}.home-board .fretboard-stage{background:0 0}.home-board .fretboard-label-rail{background:#edf2e4}.home-board .fretboard-hit.has-name:not(.is-target){visibility:hidden}.home-board .fretboard-hit.is-target .fretboard-note-symbol{color:#fff;background:var(--green);box-shadow:none}.home-board .fretboard-caption{display:none}.home-side{flex-direction:column;gap:16px;display:flex}.progress-card{padding:22px}.progress-card h2{font-size:18px}.progress-card .section-heading svg{color:#627b4e}.progress-number{color:var(--green);letter-spacing:-1px;align-items:baseline;gap:9px;margin-top:16px;font-size:50px;font-weight:600;line-height:1.25;display:flex}.progress-number>span{color:var(--muted);letter-spacing:0;font-size:13px;font-weight:400}.progress-card>p{color:var(--muted);margin-top:10px;font-size:13px}.mini-progress{background:#e4e9dc;border-radius:8px;height:6px;margin:18px 0 10px;overflow:hidden}.mini-progress>span{background:#5d8046;border-radius:8px;height:100%;display:block}.practice-invite{border:1px solid var(--line);border-radius:var(--radius);background:#f8f8ef;flex:1;padding:22px;position:relative}.practice-invite h2{font-size:18px}.practice-invite p{color:var(--muted);margin-top:9px;margin-bottom:10px;font-size:14px}.invite-icon{color:#697f57;position:absolute;top:23px;right:20px}.path-heading{justify-content:space-between;align-items:center;gap:16px;margin:24px 0 12px;display:flex}.path-heading h2{font-size:17px}.path-heading>.muted{font-size:13px}.learning-path{border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:0;display:grid}.path-step{align-items:center;gap:13px;padding:17px 16px;display:flex}.path-step+.path-step{border-left:1px solid var(--line)}.path-number{color:#657c52;font-variant-numeric:tabular-nums;align-self:flex-start;padding-top:2px;font-size:13px}.path-step strong{font-size:14px}.path-step p{color:var(--muted);margin-top:4px;font-size:12px}.path-step>svg{color:#647d52;width:18px;margin-left:auto}.tab-strip{border-radius:var(--radius-small);background:#f8f9f2;border:1px solid #dce2d2;width:100%;min-width:0;max-width:580px;padding:17px 20px 34px;display:flex}.tab-label{width:36px;color:var(--muted);flex-shrink:0;position:relative}.tab-label>strong{letter-spacing:1px;font-size:12px;position:absolute;top:34px;left:-9px;transform:rotate(-90deg)}.tab-label>span{font-family:ui-monospace,monospace;font-size:12px;line-height:18px;display:block;position:absolute;top:0;right:4px}.tab-column{width:100%;height:108px;color:var(--ink);background:0 0;border:0;border-radius:3px;padding:0;position:relative}.tab-column:disabled{opacity:1}.tab-line{border-bottom:1px solid #9fae94;height:18px;display:block;position:relative}.tab-line>span{z-index:1;background:#f8f9f2;border-radius:3px;padding:0 5px;font-family:ui-monospace,monospace;font-size:17px;line-height:21px;position:absolute;top:7px;left:50%;transform:translate(-50%)}.tab-line>span:empty{display:none}.tab-column.selected{background:#e2ebd6}.tab-column.selected .tab-line>span{color:#fff;background:var(--green)}.tab-caption{color:#627154;width:100%;font-size:12px;position:absolute;bottom:-25px;left:0}.tab-column.selected .tab-caption{color:var(--green);font-weight:700}.fretboard-figure{width:100%;min-width:0}.fretboard-bands{gap:16px;display:grid}.fretboard-band{min-width:0}.fretboard-band-label{color:var(--muted);margin:0 0 6px;font-size:13px;font-weight:600}.fretboard-layout{align-items:start;min-width:0;display:grid}.fretboard-layout>*{min-width:0}.fretboard-scroll{border-radius:var(--radius-small);background:#f8f9f3;border:1px solid #d4dcc7;width:fit-content;max-width:100%;margin:0 auto;overflow:visible}.fretboard-stage{isolation:isolate;background:#f8f9f3;position:relative}.fretboard-drawing{pointer-events:none;display:block;position:absolute;inset:0}.guitar-fret{stroke:#7b8c70;stroke-width:1.2px}.guitar-string{stroke:#667d5b}.guitar-string.is-inactive{stroke:#adb2b4}.guitar-nut{stroke:#465342;stroke-width:5px}.guitar-dot{fill:#819475}.guitar-inlay{fill:#9bab91}.fretboard-label-rail{z-index:4;pointer-events:none;background:#f8f9f3;width:36px;position:relative}.guitar-string-label{color:#52694a;font-variant-numeric:tabular-nums;align-items:center;gap:5px;width:32px;font-size:12px;display:flex;position:absolute;left:0}.guitar-string-label small{font-family:ui-monospace,monospace;font-size:12px}.guitar-string-label.is-inactive{color:#858e91}.fretboard-hit{z-index:2;color:var(--green);background:0 0;border:0;border-radius:4px;justify-content:center;align-items:center;padding:0;display:flex;position:absolute}.fretboard-hit:disabled{opacity:1}.fretboard-hit:not(:disabled):hover{background:#28534414}.fretboard-hit.is-keyboard-cursor{outline:2px solid var(--green);outline-offset:-2px;background:#2853441c}.fretboard-cursor-marker{pointer-events:none;font-size:16px;font-weight:700;position:absolute}.fretboard-keyboard-help{color:var(--muted);text-align:center;margin-top:10px;font-size:13px}.fretboard-hit.is-inactive{color:#a4abad}.fretboard-note-symbol{width:var(--symbol-size);height:var(--symbol-size);color:inherit;pointer-events:none;border-radius:50%;justify-content:center;align-items:center;font-size:12px;line-height:1;display:flex}.fretboard-note-symbol.open-symbol{font-size:23px}.fretboard-hit.has-name .fretboard-note-symbol{color:#526c40;background:#e2ead4}.fretboard-hit.is-target .fretboard-note-symbol{background:var(--target-bg);color:var(--target-ink);font-size:14px;font-weight:700;box-shadow:0 0 0 2px #ba9143}.fretboard-hit.is-revealed .fretboard-note-symbol{background:var(--target-bg);color:var(--target-ink);box-shadow:0 0 0 2px #ba9143}.fretboard-hit.is-correct .fretboard-note-symbol{color:#fff;background:var(--green);box-shadow:0 0 0 2px #28534420}.fretboard-hit.is-wrong .fretboard-note-symbol{color:#fff;background:#a44432;font-weight:700}.fretboard-note-status{top:calc(50% - var(--symbol-size) / 2 - 3px);left:calc(50% + var(--symbol-size) / 2 - 5px);color:#fff;background:var(--green);pointer-events:none;border:1px solid #fff;border-radius:50%;place-items:center;width:12px;height:12px;font-size:9px;line-height:1;display:grid;position:absolute}.fretboard-caption{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:5px 18px;margin-top:8px;font-size:12px;display:flex}.board-view-controls{border-bottom:1px solid var(--line);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px 18px;margin-bottom:18px;padding-bottom:16px;font-size:14px;display:flex}.board-view-controls label{flex-wrap:wrap;align-items:center;gap:10px;display:inline-flex}.board-view-controls select{background:var(--paper);min-height:44px;color:var(--green);border:1px solid #aebda1;border-radius:5px;padding:7px 28px 7px 12px}.board-view-controls p,.board-view-controls .muted{color:var(--muted);font-size:13px}.board-bank-note{color:var(--muted);text-align:center;margin-top:12px;font-size:12px}.curriculum-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;margin-bottom:12px;display:flex}.curriculum-heading h2{align-items:baseline;gap:10px;font-size:18px;display:flex}.curriculum-heading h2 span{color:var(--muted);font-size:13px;font-weight:400}.curriculum-start{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);align-items:flex-start;gap:16px;margin-bottom:16px;padding:16px 20px;display:flex}.curriculum-start>.pill{flex-shrink:0}.curriculum-start h3,.curriculum-list h3{word-break:keep-all;overflow-wrap:anywhere;font-size:16px;font-weight:600;line-height:1.6}.curriculum-start p,.curriculum-list p{color:var(--muted);margin-top:3px;font-size:13px}.curriculum-outline{border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);overflow:hidden}.curriculum-section{grid-template-columns:190px minmax(0,1fr);display:grid}.curriculum-section+.curriculum-section{border-top:1px solid var(--line)}.curriculum-section-heading{border-right:1px solid var(--line);background:#f8f9f2;padding:22px 20px}.curriculum-section-heading .eyebrow{margin-bottom:4px}.curriculum-section-heading h2{font-size:17px}.curriculum-section-heading p{color:var(--muted);margin-top:5px;font-size:12px}.curriculum-list{margin:0;padding:0;list-style:none}.curriculum-list li{align-items:baseline;gap:16px;padding:16px 22px;display:flex}.curriculum-list li+li{border-top:1px solid var(--line)}.curriculum-number{font-variant-numeric:tabular-nums;color:var(--green);flex:0 0 24px;font-size:13px;font-weight:600}.curriculum-lesson-content{flex:1;min-width:0}.curriculum-lesson-title{flex-wrap:wrap;align-items:baseline;gap:4px 12px;display:flex}.curriculum-pending{color:var(--muted);white-space:nowrap;font-size:12px}.curriculum-sublessons{gap:6px;margin-top:13px;display:grid}.curriculum-sublessons a{border:1px solid var(--line);border-radius:var(--radius-small);background:#f7f9f2;align-items:center;gap:13px;padding:12px 14px;display:flex}.curriculum-sublessons a:hover{background:var(--soft);border-color:#8fa48a}.curriculum-subnumber{color:var(--green);align-self:flex-start;padding-top:2px;font-size:13px;font-weight:600}.curriculum-sublessons strong{color:var(--green);font-size:14px;display:block}.curriculum-sublessons small{color:var(--muted);margin-top:3px;font-size:12px;display:block}.curriculum-sublessons svg{color:var(--green);margin-left:auto}.curriculum-footnote{color:var(--muted);margin-top:16px;font-size:13px}@container app (width<=660px){.curriculum-start{gap:12px;padding:14px}.curriculum-section{grid-template-columns:minmax(0,1fr)}.curriculum-section-heading{border-right:0;border-bottom:1px solid var(--line);padding:14px 16px}.curriculum-section-heading .eyebrow{margin-right:8px;display:inline}.curriculum-section-heading h2{display:inline}.curriculum-section-heading p{margin-top:2px}.curriculum-list li{gap:10px;padding:14px 16px}.curriculum-list h3{font-size:15px}}.lesson-back{margin-top:-10px;margin-bottom:8px}.lesson-return-row{margin-top:16px}.lesson-start{scroll-margin-top:90px}.lesson-start-actions{flex-wrap:wrap;gap:10px;display:flex}.position-lesson-nav{flex-wrap:wrap;gap:6px;margin-bottom:20px;display:flex}.position-lesson-nav a{border:1px solid var(--line);border-radius:var(--radius-small);align-items:center;gap:7px;min-height:44px;padding:9px 13px;font-size:14px;display:inline-flex}.position-lesson-nav a>span{font-size:12px}.position-lesson-nav a[aria-current=page]{border-color:var(--green);background:var(--green);color:#fff}.position-lesson-nav a:not([aria-current]):hover{background:var(--soft)}.position-concept{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:18px;padding:16px 18px}.position-concept h2{margin-bottom:6px;font-size:16px}.position-concept p{font-size:14px}.position-concept .position-concept-caption{color:var(--muted);margin-top:8px;font-size:13px}.position-page-intro{margin-bottom:18px}.position-topbar{align-items:center;gap:12px;min-width:0;margin-bottom:18px;display:flex}.position-topbar>a{flex-shrink:0}.position-topbar h1{letter-spacing:-.6px;white-space:nowrap;flex:1;min-width:0;font-size:21px}.position-topbar .position-lesson-nav{flex-shrink:0;margin:0}.position-topbar>button{flex-shrink:0;padding-inline:12px}.correct-answer-dialog{background:var(--paper);width:min(360px,100vw - 36px);color:var(--ink);text-align:center;border:1px solid #a8bba3;border-radius:12px;margin:auto;padding:30px 24px 24px;position:fixed;inset:0;box-shadow:0 18px 70px #122d2438}.correct-answer-dialog::backdrop{background:#172b2659}.correct-answer-mark{background:var(--soft);width:62px;height:62px;color:var(--green);border-radius:50%;place-items:center;margin:0 auto 16px;display:grid}.correct-answer-dialog h2{margin-bottom:24px;font-size:25px}.correct-answer-dialog>.button{width:100%}.correct-answer-close{width:44px;height:44px;color:var(--muted);background:0 0;border:0;border-radius:6px;place-items:center;padding:0;font-size:25px;display:grid;position:absolute;top:4px;right:4px}@container app (width<=1080px){.position-topbar{flex-wrap:wrap;gap:8px 12px}.position-topbar h1{flex-basis:calc(100% - 320px)}}@container app (width<=660px){.position-topbar h1{white-space:normal;flex-basis:100%;order:-1;font-size:22px}.position-topbar .position-lesson-nav a{min-width:44px;padding-inline:9px}.position-topbar>button{padding-inline:8px}}.position-lesson-nav.is-compact{gap:6px;margin-bottom:12px}.position-lesson-nav.is-compact a{flex:none;min-width:54px;padding:8px 14px;font-weight:600}.position-topbar .position-lesson-nav.is-compact{margin:0}.position-explanation-label{color:var(--green);align-items:center;gap:7px;margin-bottom:10px;font-size:13px;font-weight:700;display:inline-flex}.position-rule-list{margin:10px 0;padding-left:21px;font-size:15px;line-height:1.8}.position-rule-list li+li{margin-top:5px}.position-explanation{border-radius:var(--radius);background:var(--paper);border:1px solid #bdccb2;margin-bottom:16px}.position-explanation summary{min-height:44px;color:var(--green);cursor:pointer;align-items:center;gap:8px;padding:10px 14px;font-size:14px;font-weight:600;display:flex}.position-explanation summary:after{content:"⌄";margin-left:auto;font-size:18px;line-height:1}.position-explanation[open] summary:after{transform:rotate(180deg)}.position-explanation .position-concept{border:0;border-top:1px solid var(--line);border-radius:0 0 var(--radius) var(--radius);margin:0}.position-explanation .position-explanation-label{display:none}.position-mark-examples,.position-octave-examples{flex-wrap:wrap;gap:10px 24px;margin-top:12px;display:flex}.position-mark-examples>span{align-items:center;gap:7px;font-size:13px;display:flex}.position-mark-examples b{color:var(--green);letter-spacing:2px;font-size:20px;line-height:1}.position-octave-examples>span{font-variant-numeric:tabular-nums;color:var(--green);font-size:17px;font-weight:600}.position-octave-examples small{color:var(--muted);margin-left:5px;font-size:12px;font-weight:400}.position-direction-label{color:var(--green);margin-right:auto;font-size:13px;font-weight:600}.position-direction-results{flex-wrap:wrap;justify-content:center;gap:10px 30px;margin-top:18px;display:flex}.position-direction-results strong{color:var(--green);margin-left:8px}.position-guide{border-bottom:1px solid var(--line);margin-bottom:16px;font-size:14px}.position-guide summary{cursor:pointer;min-height:44px;color:var(--green);outline-offset:3px;padding:10px 0;font-weight:600}.position-guide summary:focus-visible{outline:3px solid #9a6a20}.position-guide>div{max-width:76ch;color:var(--muted);padding-bottom:16px}.position-guide p+p{margin-top:8px}.position-exercise{padding:22px}.position-progress{appearance:none;width:100%;height:4px;color:var(--green);background:#e2e8dc;border:0;border-radius:3px;margin:14px 0 20px;display:block}.position-progress::-webkit-progress-bar{background:#e2e8dc;border-radius:3px}.position-progress::-webkit-progress-value{background:var(--green);border-radius:3px}.position-progress::-moz-progress-bar{background:var(--green);border-radius:3px}.position-question-title,#position-result-title{scroll-margin-top:82px}.position-question-title{font-size:20px}.position-orientation{color:var(--muted);margin-top:5px;font-size:13px}.position-question-layout{align-items:start;gap:24px;margin-top:22px;display:grid}.position-question-layout h3{align-items:center;gap:8px;margin-bottom:10px;font-size:14px;font-weight:600;display:flex}.position-question-board{min-width:0}.position-prompt-panel,.position-response-panel{border:1px solid var(--line);border-radius:var(--radius-small);background:#f7f8f2;min-width:0;padding:14px}.position-response-panel{background:#f5f9f0;border:2px solid #79967c;padding:13px}.position-panel-heading{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:14px;display:flex}.position-question-layout .position-panel-heading h3{margin:0;font-size:15px}.position-role-label{color:#4d594f;background:#e3e7de;border-radius:4px;justify-content:center;align-items:center;min-height:26px;padding:2px 8px;font-size:13px;font-weight:700;display:inline-flex}.position-role-label.is-answer{color:#fff;background:var(--green)}.position-step-number{width:23px;height:23px;color:var(--green);border:1px solid #9bae91;border-radius:50%;place-items:center;margin-right:6px;font-size:12px;display:inline-grid}.position-tab{border:1px solid var(--line);border-radius:var(--radius-small);background:#f8f9f3;padding:12px 10px}.position-tab-row{align-items:center;gap:9px;width:100%;height:36px;display:flex}.position-tab-string{color:var(--muted);text-align:left;flex:0 0 26px;font-size:12px}.position-tab-line{flex:1;justify-content:center;align-items:center;height:100%;display:flex;position:relative}.position-tab-line:before{content:"";background:#819079;height:1px;position:absolute;left:0;right:0}.position-tab-line>span:not(:empty){text-align:center;background:#f8f9f3;border-radius:3px;min-width:26px;padding:0 5px;font:600 21px/28px ui-monospace,monospace;position:relative}.tab-answer fieldset{border:0;min-width:0;margin:0;padding:0}.tab-answer legend{margin-bottom:10px;padding:0;font-size:14px;font-weight:600}.practice-entry{margin-block:0 20px}.practice-entry h2{margin-bottom:8px;font-size:20px}.practice-entry .lesson-start-actions{margin-block:16px 10px}.tab-answer .position-tab{border-radius:var(--radius-small);background:var(--paper);border:1px solid #b7c6af;gap:0;padding:8px 10px;display:grid}.tab-answer .position-tab-row{background:0 0;border:0;border-radius:0;gap:7px;height:44px;padding:0}.tab-answer .position-tab-line>span:not(:empty){background:var(--paper)}.position-tab-pick{color:#4d6747;text-align:right;flex:0 0 36px;font-size:12px}.tab-answer:focus-visible{outline:none}.tab-answer-summary{color:var(--muted);margin-top:12px;font-size:14px}.tab-answer-summary strong{color:var(--green)}.tab-answer-keyboard-tip{color:var(--muted);margin:-3px 0 14px;font-size:13px}.tab-fret-input-row{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:10px;font-size:13px;display:flex}.tab-fret-input-row input{border-radius:var(--radius-small);background:var(--paper);width:76px;min-height:44px;color:var(--green);text-align:center;border:1px solid #9bae91;padding:7px 10px;font-size:20px;font-weight:600}.tab-fret-input-row>span,.tab-fret-entry-hint{color:var(--muted);font-size:12px}.tab-fret-entry-hint{margin-bottom:9px}.tab-answer .position-tab-row:not(:disabled):hover{background:var(--soft)}.tab-answer .position-tab-row.is-selected{background:#f5ead2;border-color:#c5a56c}.tab-answer .is-selected .position-tab-line>span{color:var(--target-ink);background:var(--target-bg)}.tab-answer.is-solved .is-selected{background:#e9f2e3;border-color:#9db48e}.tab-answer.is-solved .is-selected .position-tab-line>span{color:#fff;background:var(--green)}.tab-answer .tab-answer-frets{margin-top:14px}.tab-fret-options{grid-template-columns:repeat(6,minmax(0,1fr));gap:3px;display:grid}.tab-fret-options button{border-radius:var(--radius-small);background:var(--paper);font-variant-numeric:tabular-nums;border:1px solid #bac8b0;min-width:0;min-height:44px;font-size:18px}.tab-fret-options button:not(:disabled):hover{background:var(--soft)}.tab-fret-options button.selected{color:var(--target-ink);background:var(--target-bg);border-color:#b69350}.tab-answer.is-solved .tab-fret-options button.selected{color:#fff;background:var(--green);border-color:var(--green)}.tab-answer-submit{width:100%;margin-top:12px}.position-hint{border-radius:var(--radius-small);color:#66552c;background:#f5f1df;align-items:flex-start;gap:8px;margin-top:16px;padding:12px;font-size:14px;display:flex}.position-hint svg{margin-top:3px}.position-question-actions>div{flex-wrap:wrap;gap:4px;display:flex}.position-next-key{opacity:.8;border:1px solid;border-radius:3px;padding:0 5px;font-family:inherit;font-size:11px;line-height:1.6}.position-result{text-align:center;padding:28px}.position-result h2{margin-top:18px}.position-result-score{color:var(--green);justify-content:center;align-items:baseline;gap:12px;margin:18px 0 0;display:flex}.position-result-score strong{font-size:64px;font-weight:600;line-height:1.2}.position-result-score span{color:var(--muted);font-size:18px}.position-result>p{margin-top:8px;font-size:14px}.position-result-stats{border-block:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:24px 0 0;padding:20px 0;display:grid}.position-result-stats dt{color:var(--muted);font-size:13px}.position-result-stats dd{margin:6px 0 0;font-size:24px;font-weight:600}.position-exercise.is-wide{padding-inline:20px}.position-question-layout.is-stacked>.position-tab-prompt{grid-template-columns:minmax(90px,auto) minmax(0,240px);align-items:center;gap:18px;display:grid}.position-question-layout.is-stacked .position-tab-prompt .position-panel-heading{margin:0}.position-question-layout.is-stacked .position-tab-prompt .position-tab-row{height:22px}.position-question-layout.is-stacked .position-tab-response .tab-answer{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;column-gap:24px;width:100%;max-width:760px;margin-inline:auto;display:grid}.position-question-layout.is-stacked .tab-answer-strings{grid-row:span 3}.position-question-layout.is-stacked .tab-answer-frets{margin-top:0}.position-question-layout.is-stacked .tab-answer-submit{align-self:end}@container app (width<=660px){.position-lesson-nav{gap:5px;margin-bottom:16px}.position-lesson-nav a{flex:100%;justify-content:flex-start;gap:8px;padding:8px 12px;font-size:13px}.position-concept{padding:14px}.position-exercise{padding:16px 12px}.position-exercise.is-wide{padding-inline:12px}.position-question-title{word-break:keep-all;text-wrap:balance;font-size:18px}.position-question-layout{gap:18px;margin-top:18px}.position-question-layout.is-stacked>.position-tab-prompt{grid-template-columns:minmax(80px,auto) minmax(0,180px);gap:10px}.position-panel-heading{margin-bottom:12px}.position-prompt-panel{padding:8px}.position-response-panel{padding:7px}.position-tab-prompt .position-tab-line>span{font-size:18px;line-height:22px}.tab-answer,.position-question-layout.is-stacked .position-tab-response .tab-answer{display:block}.position-question-layout.is-stacked .tab-answer-frets,.tab-answer .tab-answer-frets{margin-top:14px}.position-question-actions{flex-wrap:wrap;gap:8px}.position-question-actions>div{flex:1;gap:0}.position-question-actions .button.quiet{padding-inline:9px}.position-result{padding:22px 16px}.position-result-stats{gap:8px}.position-result-stats dt{font-size:12px}.position-result .action-row{flex-direction:column}.position-result .action-row>*{width:100%}.curriculum-sublessons a{gap:9px;padding:11px 10px}}.lesson-tabs{gap:7px;margin-bottom:16px;display:flex}.lesson-tabs button{border-radius:var(--radius-small);color:#536b46;background:#f8faf2;border:1px solid #cbd6bf;align-items:center;gap:9px;min-height:44px;padding:9px 15px;font-size:14px;display:flex}.lesson-tabs button[aria-selected=true]{border-color:var(--green);background:var(--green);color:#fff}.lesson-tabs button>span{opacity:.85;font-size:12px}.learning-card{padding:24px}.learning-card>.muted{margin-top:9px;font-size:14px}.tab-note-layout{grid-template-columns:minmax(0,1fr) 180px;align-items:center;gap:24px;margin:22px 0;display:grid}.note-detail{border-left:1px solid var(--line);flex-direction:column;align-items:center;gap:5px;font-size:14px;display:flex}.note-detail>.muted{font-size:12px}.note-detail>strong{color:var(--green);font-size:52px;font-weight:600;line-height:1.1}.note-detail>.button{margin-top:7px}.board-heading{justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;font-size:12px;display:flex}.board-heading>span:first-child{align-items:center;gap:7px;display:flex}.legend-dot{background:var(--target-bg);border:1px solid #b58a35;border-radius:50%;width:8px;height:8px;display:inline-block}.lesson-explanation{border-radius:var(--radius-small);color:#526847;background:#eef2e6;align-items:flex-start;gap:11px;margin-top:18px;padding:14px 16px;font-size:14px;display:flex}.lesson-explanation>svg{margin-top:3px}.mode-tabs{background:#e6ecdd;border-radius:7px;gap:4px;width:fit-content;margin-bottom:18px;padding:4px;display:flex}.mode-tabs button{border-radius:var(--radius-small);color:#52694a;background:0 0;border:1px solid #0000;min-height:44px;padding:9px 19px;font-size:14px}.mode-tabs button.selected{background:var(--paper);color:var(--green);border-color:#c4d1b8;font-weight:700;box-shadow:0 1px 2px #25392f0a}.exercise-card{padding:24px}.exercise-meta{justify-content:space-between;align-items:center;gap:16px;display:flex}.question-heading{text-align:center;margin:23px 0 20px}.question-heading h2{letter-spacing:-.7px;font-size:24px;line-height:1.5}.question-heading p{color:var(--muted);margin-top:8px;font-size:14px}.note-choices{justify-content:center;gap:10px;margin:22px auto 16px;display:flex}.note-choices button{color:#334d29;background:#fafcf4;border:1px solid #afbea4;border-radius:6px;width:60px;min-height:52px;padding:5px;font-size:21px;font-weight:500}.note-choices button:hover:not(:disabled){border-color:var(--green);background:#e6efda}.note-choices button:disabled{opacity:1;color:#6d7d62;background:#f2f5e9;border-color:#d0dac6}.note-choices button.answer-correct{background:var(--green);color:#fff;border-color:var(--green)}.note-choices button.answer-revealed{background:var(--target-bg);color:var(--target-ink);border-color:#ba9143}.note-choices.is-chromatic{grid-template-columns:repeat(6,minmax(0,1fr));max-width:450px;display:grid}.note-choices.is-chromatic button{width:100%;max-width:none}.practice-next-actions{flex-wrap:wrap;justify-content:flex-end;gap:8px;display:flex}.feedback{border-radius:var(--radius-small);border:1px solid #0000;justify-content:center;align-items:flex-start;gap:9px;min-height:49px;margin-top:14px;padding:12px 15px;font-size:14px;line-height:1.75;display:flex}.feedback>svg{margin-top:3px}.feedback.success{color:#2c5b3d;background:#e9f2e3;border-color:#cbdcbd}.feedback.neutral{color:#66552c;background:#f5f1df;border-color:#e4dbbb}.feedback.error{color:var(--error-ink);background:var(--error-bg);border-color:#e9cabc}.feedback.placeholder{color:var(--muted);font-size:13px}.next-check{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:22px;margin-top:20px;padding:18px 0 0;display:flex}.next-check strong{font-size:15px}.next-check p{color:var(--muted);margin-top:5px;font-size:13px}.next-check .button{flex-shrink:0}.all-controls{color:#506743;flex-wrap:wrap;justify-content:center;align-items:center;gap:24px;margin:0 0 18px;font-size:14px;display:flex}.all-controls label{align-items:center;gap:9px;display:flex}.all-controls select{border-radius:var(--radius-small);background:var(--paper);min-height:44px;color:var(--green);border:1px solid #aebda1;padding:6px 25px 6px 12px;font-weight:600}.all-controls .checkbox{min-height:44px}.all-controls strong{color:var(--green);font-size:15px}input[type=checkbox]{width:18px;height:18px;accent-color:var(--green)}.focus-banner{color:#3b5b2e;background:#eaf2e2;border:1px solid #cbdcbd;border-radius:6px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;padding:13px 16px;font-size:14px;display:flex}.focus-banner .text-link{flex-shrink:0;font-size:13px}.check-progress{align-items:center;gap:20px;display:flex}.check-progress>strong{flex-shrink:0;font-size:22px;font-weight:700;line-height:1.5}.check-progress>strong>span{color:var(--muted);font-size:13px;font-weight:400}.progress-track{flex:1;gap:5px;display:flex}.progress-track>span{background:#e1e8d8;border-radius:4px;flex:1;height:6px}.progress-track>span.done{background:#557a40}.progress-track>span.current{background:#9a6e21}.exercise-card>.tab-strip{max-width:400px;margin:0 auto 19px;padding-top:12px;padding-bottom:30px}.results-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.score-card{border-radius:var(--radius);text-align:center;background:#eaf2e2;border:1px solid #cbdcc0;padding:26px}.score-card>.pill{color:#3e6030;background:#d9e8cc}.score-card>p{color:#4d6740;margin-top:17px;font-size:14px}.big-score{color:var(--green);letter-spacing:-4px;margin:8px 0;font-size:84px;font-weight:600;line-height:1.25}.big-score>span{color:#58764a;letter-spacing:0;margin-left:10px;font-size:28px;font-weight:400}.score-bars{justify-content:center;gap:7px;margin:14px 0 19px;display:flex}.score-bars>span{background:#d8e1ca;border-radius:2px;width:20px;height:9px}.score-bars>span.yes{background:#4b7638}.score-bars>span.help{background:#9c792c}.comparison{color:#4d6740;border-top:1px solid #cbdcc0;flex-wrap:wrap;justify-content:center;align-items:center;gap:9px;margin-top:20px;padding-top:16px;font-size:13px;display:flex}.comparison strong{color:var(--green);font-size:16px}.comparison small{flex-basis:100%;font-size:12px}.result-detail{padding:24px}.result-detail h2{margin-bottom:16px;font-size:19px}.result-line{border-bottom:1px solid #e1e7d8;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:15px;padding:16px 0;font-size:14px;display:flex}.result-line>span{color:var(--muted);align-items:center;gap:9px;display:flex}.result-line svg{width:18px}.result-line strong{font-weight:600}.result-line .date-value{font-size:13px}.result-caption{margin-top:17px;font-size:13px}.newly-correct{border-radius:var(--radius-small);color:#476736;background:#eef4e5;margin-top:17px;padding:13px 15px;font-size:14px}.next-recommendation{align-items:center;gap:20px;margin-top:20px;padding:23px;display:flex}.recommend-icon{color:#587c42;background:#eaf1e0;border-radius:7px;flex-shrink:0;place-items:center;width:56px;height:56px;display:grid}.next-recommendation>div{min-width:0}.next-recommendation h2{font-size:19px}.next-recommendation p{color:var(--muted);margin-top:7px;font-size:14px}.next-recommendation .button{flex-shrink:0;margin-left:auto}.weak-card{margin-top:20px;padding:22px 24px}.weak-card h2{font-size:18px}.weak-positions{flex-wrap:wrap;gap:10px;margin-top:16px;display:flex}.weak-positions button{background:#f6f9ef;border:1px solid #c8d6bc;border-radius:6px;align-items:center;gap:12px;min-height:48px;padding:10px 14px;display:flex}.weak-positions button:hover{background:#eaf1de;border-color:#738f5d}.weak-positions button strong{color:var(--green);font-size:22px}.weak-positions button span{color:#506c40;font-size:13px}.weak-positions button svg{color:#5e7b4b}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:420px;padding:24px;display:flex}.empty-state h1{font-size:26px}.empty-state p{color:var(--muted);max-width:48ch;margin:12px 0 23px;font-size:15px}.empty-icon{color:#567e3c;background:#e5eddc;border-radius:50%;place-items:center;width:72px;height:72px;margin-bottom:20px;display:grid}.empty-state>.quiet{margin-top:8px}.history-card{padding:24px}.history-list{margin-top:13px}.history-list>a{border-bottom:1px solid #dde5d4;align-items:center;gap:16px;padding:20px 0;display:flex}.history-list>a:last-child{border-bottom:0}.history-list>a:hover{background:#f4f8ec}.history-icon{color:#4e7734;background:#e8f0dd;border-radius:50%;padding:10px}.history-list strong{font-size:15px;font-weight:600}.history-list p{color:var(--muted);margin-top:6px;font-size:13px}.history-score{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:3px;margin-left:auto;display:flex}.history-score>strong{color:var(--green);font-size:28px;line-height:1.3}.history-score small{color:#5d7550;font-size:16px}.history-score>span{color:var(--muted);font-size:12px}.history-list>a>svg{color:#5d7e46;width:18px}.recent-label{color:#3e652c;background:#e8f1dd;border-radius:3px;margin-left:8px;padding:2px 6px;font-size:11px;font-weight:500;display:inline-block}.save-banner{color:#72531b;background:#fbf1da;border:1px solid #c1a66b;border-radius:6px;align-items:flex-start;gap:12px;margin-bottom:22px;padding:15px 17px;display:flex}.save-banner>svg{margin-top:3px}.save-banner strong{font-size:14px}.save-banner p{margin-top:5px;font-size:13px}.save-banner>.button{flex-shrink:0;margin-left:auto}@container app (width<=1150px){.app-header{gap:20px;padding-left:28px;padding-right:28px}.brand{gap:8px;font-size:19px}.brand-mark{width:33px}.header-tools{gap:10px}.header-meta{display:none}main{padding:28px}.lesson-card,.progress-card,.practice-invite{padding:20px}.lesson-card h2{font-size:28px}.card-foot{flex-direction:column;align-items:flex-start;gap:13px}.card-foot .button{align-self:stretch}.invite-icon,.path-step>svg,.path-heading>.muted{display:none}.next-recommendation{flex-wrap:wrap}.next-recommendation>div{flex:1}.next-recommendation .button{margin-left:76px}}@container app (width<=900px){.app-header{grid-template-columns:auto minmax(0,1fr);row-gap:10px}.app-nav{grid-area:2/1/auto/-1;grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.header-tools{grid-area:1/2}.learning-card,.exercise-card{padding:20px}.lesson-tabs button{padding-left:12px;padding-right:12px;font-size:13px}.results-grid{gap:16px}.score-card,.result-detail{padding:21px}.check-progress{gap:14px}.check-progress>.scope-tag{display:none}.tab-note-layout{grid-template-columns:minmax(0,1fr) 150px;gap:18px}}@container app (width<=660px){.app-shell{--body:14px}.app-header{gap:8px 12px;padding:10px 16px 8px}.brand{gap:7px;font-size:17px}.brand-mark{border-radius:5px;width:29px;height:32px}.brand-mark svg{width:22px}.app-nav{gap:4px}.app-nav a{flex-direction:column;gap:3px;min-height:48px;padding:5px 4px;font-size:12px;line-height:1.4}.app-nav a svg{width:18px;height:18px}.header-tuning{display:none}.header-meta{white-space:normal}.header-meta .local-note{font-size:11px}.header-tools{justify-self:end}.display-switch button{padding-inline:9px}.keyboard-help{display:none}.touch-help{display:inline}.fretboard-keyboard-help{text-align:left}main{padding:22px 16px 27px}h1{letter-spacing:-.8px;font-size:25px}h2{font-size:19px}.page-intro{margin-bottom:19px}.page-intro p{margin-top:8px;font-size:14px;line-height:1.75}.page-intro .eyebrow{margin-bottom:6px;font-size:12px}.button,.action-row .button{min-height:44px;padding:10px 15px;font-size:14px}.button.small{min-height:44px;font-size:13px}.text-link{min-height:44px;font-size:14px}.lesson-card{padding:20px}.lesson-card h2{margin-top:16px;font-size:29px}.lesson-card-copy{margin-top:10px;font-size:14px}.card-foot{flex-direction:row;align-items:center;gap:12px;margin-top:18px;padding-top:15px}.card-foot .button{flex-shrink:0;align-self:auto;padding-left:13px;padding-right:13px;font-size:13px}.card-foot .text-small,.card-foot .scope-tag{font-size:12px}.home-board{margin:14px -9px -8px}.home-side{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);grid-template-columns:1fr;gap:0;display:grid}.progress-card{background:0 0;border:0;border-radius:0;padding:20px}.progress-card h2{font-size:18px}.progress-number{margin-top:10px;font-size:42px}.progress-number>span,.progress-card>p{font-size:13px}.practice-invite{border:0;border-top:1px solid var(--line);background:0 0;border-radius:0;padding:20px}.practice-invite h2{font-size:18px}.practice-invite p{font-size:14px}.path-heading{margin:24px 0 10px}.path-heading h2{font-size:17px}.learning-path{grid-template-columns:1fr}.path-step{gap:14px;padding:15px 0}.path-step+.path-step{border-left:0;border-top:1px solid var(--line)}.path-step strong{font-size:14px}.path-step p{font-size:13px}.path-step>svg{display:block}.lesson-tabs{gap:5px;width:100%;margin-bottom:14px}.lesson-tabs button{flex:1;justify-content:center;gap:5px;min-height:44px;padding:9px 6px;font-size:12px}.lesson-tabs button>span{font-size:11px}.lesson-tabs button>svg{width:12px}.learning-card{padding:18px 14px}.learning-card .section-heading{flex-direction:column;align-items:flex-start;gap:7px}.learning-card>.muted{font-size:14px}.scope-tag{font-size:12px}.tab-note-layout{grid-template-columns:minmax(0,1fr);gap:16px;margin:18px 0}.tab-strip{padding:14px 15px 32px}.note-detail{border-left:0;border-bottom:1px solid var(--line);flex-flow:wrap;justify-content:center;gap:10px;padding-bottom:14px;font-size:14px}.note-detail>.muted{display:none}.note-detail>strong{margin-right:4px;font-size:35px}.note-detail>.button{margin:0 0 0 3px}.board-heading{flex-wrap:wrap;gap:5px 10px;font-size:12px}.board-heading>.muted{font-size:12px}.lesson-explanation{gap:8px;margin-top:14px;padding:12px;font-size:14px}.lesson-explanation>svg{width:18px}.action-row{gap:10px;margin-top:16px}.bottom-tip{margin-top:16px;font-size:13px}.mode-tabs{gap:2px;width:100%;margin-bottom:16px;padding:4px}.mode-tabs button{flex:1;min-height:44px;padding:8px 4px;font-size:12px;line-height:1.5}.exercise-card{padding:16px 12px}.board-view-controls{margin-bottom:12px;padding-bottom:10px}.exercise-meta{flex-wrap:wrap;align-items:center;gap:7px 10px}.exercise-meta .pill{padding:3px 7px;font-size:12px}.question-heading{margin:18px 0 16px}.question-heading h2{font-size:20px;line-height:1.5}.question-heading p{margin-top:7px;font-size:13px}.note-choices{gap:5px;margin-top:18px;margin-bottom:13px}.note-choices button{flex:1;width:auto;min-width:0;max-width:53px;min-height:46px;padding:4px;font-size:20px}.feedback{justify-content:flex-start;margin-top:12px;padding:10px 12px;font-size:14px}.feedback>svg{width:18px}.feedback.placeholder{justify-content:center;min-height:0;padding:7px 3px;font-size:13px}.next-check{flex-direction:column;align-items:flex-start;gap:13px;margin-top:18px;padding-top:17px}.next-check strong{font-size:15px}.next-check p{font-size:13px}.next-check .button{align-self:stretch}.all-controls{justify-content:space-between;gap:8px 14px;margin-bottom:15px;font-size:13px}.all-controls label{gap:7px}.all-controls select{padding-right:16px}.all-controls strong{font-size:14px}.check-progress{gap:13px}.check-progress>strong{font-size:20px}.check-progress>strong>span{font-size:12px}.progress-track{gap:4px}.progress-track>span{height:5px}.exercise-card>.tab-strip{margin-bottom:15px;padding-top:10px;padding-bottom:28px}.focus-banner{flex-direction:column;align-items:flex-start;gap:4px;padding:11px 14px;font-size:14px}.results-grid{grid-template-columns:1fr;gap:16px}.score-card{padding:22px}.big-score{font-size:76px}.big-score>span{font-size:26px}.score-card>p{margin-top:13px}.result-detail{padding:21px}.result-detail h2{margin-bottom:10px;font-size:18px}.result-line{gap:10px;padding:14px 0;font-size:14px}.result-line .date-value,.result-caption{font-size:13px}.next-recommendation{align-items:flex-start;gap:14px;padding:20px}.recommend-icon{width:44px;height:44px}.recommend-icon svg{width:24px}.next-recommendation>div{min-width:180px}.next-recommendation h2{font-size:18px}.next-recommendation p{font-size:14px}.next-recommendation .button{width:100%;margin-left:0}.weak-card{padding:20px}.weak-card .section-heading{flex-direction:column;align-items:flex-start;gap:6px}.weak-positions{gap:8px}.weak-positions button{flex:1;gap:9px;min-width:135px;padding:10px}.weak-positions button span{font-size:13px}.empty-state{min-height:390px;padding:20px 5px}.empty-state h1{font-size:23px}.empty-state p{font-size:14px}.history-card{padding:20px 16px}.history-card h2{font-size:18px}.history-list>a{flex-wrap:wrap;gap:11px;padding:18px 0}.history-icon{padding:8px}.history-list>a>div:not(.history-score){flex:1;min-width:150px}.history-list strong{font-size:14px}.history-list p{font-size:12px}.history-score{margin-left:auto}.history-score>strong{font-size:25px}.history-score>span{font-size:12px}.history-list>a>svg{display:none}.recent-label{font-size:11px}.save-banner{flex-wrap:wrap;gap:10px;padding:13px}.save-banner>div{flex:1;min-width:200px}.save-banner>.button{margin-left:30px}.workspace[data-page=practice] .page-intro,.workspace[data-page=check] .page-intro{margin-bottom:14px}.workspace[data-page=practice] .page-intro h1,.workspace[data-page=check] .page-intro h1{font-size:23px}.workspace[data-page=practice] .page-intro p,.workspace[data-page=check] .page-intro p{margin-top:6px;font-size:13px;line-height:1.65}}@container app (width<=380px){.brand{gap:5px;font-size:15px}.brand-mark{width:26px}.app-header{column-gap:8px;padding-left:13px;padding-right:13px}main{padding-left:13px;padding-right:13px}.card-foot{flex-direction:column;align-items:stretch}.card-foot .button{align-self:stretch}.lesson-tabs button{gap:4px;font-size:11px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important}}.position-lesson-nav a>.lesson-nav-title{font-size:inherit;font-weight:inherit}@container app (width<=660px){.app-shell{--green:#087a68;--green-hover:#066451;--ink:#223139;--muted:#5e6d75;--line:#e2e8eb;--paper:#fff;--soft:#eaf6f2;--target-bg:#fff1d6;--target-ink:#7c4c08;--error-bg:#fff0ed;--error-ink:#a13228;--radius:20px;--radius-small:8px;color:var(--ink);background:#f6f8fa}.app-header{border-color:var(--line);background:#fff;gap:4px 12px;padding:8px 16px 0}.brand{color:var(--ink);letter-spacing:-.7px;font-size:18px}.brand-mark{width:30px;height:32px;color:var(--green);background:var(--soft);border-radius:9px}.display-switch{background:#f1f4f6;border:0;border-radius:9px;gap:0;padding:2px}.display-switch button{min-height:44px;color:var(--muted);border-radius:7px;padding-inline:10px}.display-switch button[aria-pressed=true]{color:var(--green);background:#fff;box-shadow:0 1px 4px #22313914}.display-switch button:hover:not([aria-pressed=true]){color:var(--ink);background:#e7edef}.app-nav{gap:8px}.app-nav a{min-height:52px;color:var(--muted);box-shadow:none;background:0 0;border-radius:0;padding:6px 2px 9px}.app-nav a.active{color:var(--green);box-shadow:inset 0 -3px var(--green);background:0 0}.app-nav a svg{width:19px;height:19px}main{padding:18px 14px 28px}h1{color:var(--ink);letter-spacing:-.8px;text-wrap:balance;font-size:24px}h2,h3{color:var(--ink)}.page-intro{margin-bottom:20px}.page-intro p{color:var(--muted);line-height:1.65}.eyebrow{color:var(--muted)}.button{border-radius:8px}.button.primary{background:var(--green);border-color:var(--green);color:#fff}.button.primary:hover:not(:disabled){background:var(--green-hover);border-color:var(--green-hover)}.button.secondary{color:var(--ink);background:#fff;border-color:#d3dde1}.button.secondary:hover:not(:disabled),.button.quiet:hover:not(:disabled){background:#f0f4f6}.button.quiet,.text-link{color:var(--muted)}.button:disabled{color:#6c7b83;opacity:1;background:#f0f3f5;border-color:#e2e8eb}.pill,.scope-tag{color:var(--muted)}.pill{background:#f1f4f6;border-radius:6px}.card{border:1px solid var(--line);border-radius:var(--radius);background:#fff}.bottom-tip,.board-bank-note{color:var(--muted);font-size:12px;line-height:1.7}.position-lesson-nav{background:#edf1f4;border-radius:12px;flex-wrap:wrap;gap:4px;margin:0 0 16px;padding:4px;display:flex}.position-lesson-nav a{min-width:44px;min-height:44px;color:var(--muted);background:0 0;border:0;border-radius:8px;flex:1 1 0;justify-content:center;padding:8px 6px}.position-lesson-nav a>span{font-size:13px;font-weight:600}.position-lesson-nav .lesson-nav-title{display:none}.position-lesson-nav a[aria-current=page]{color:var(--green);background:#fff;box-shadow:0 1px 4px #22313912}.position-lesson-nav a:not([aria-current]):hover{background:#e0e9ed}.position-topbar{gap:4px 8px;margin-bottom:14px}.position-topbar h1{margin-bottom:8px;font-size:21px}.position-topbar .position-lesson-nav.is-compact{gap:2px;padding:2px}.position-topbar .position-lesson-nav.is-compact a{min-width:48px;padding:8px 6px}.position-topbar>a{gap:4px;font-size:13px}.position-topbar>.button{color:var(--muted);background:0 0;border-color:#0000;padding-inline:8px;font-size:13px}.lesson-back{margin-top:-6px;margin-bottom:6px}.lesson-return-row .button{color:var(--muted);background:0 0;border-color:#0000}.lesson-start{border-radius:var(--radius)}.position-concept,.theory-intro,.same-string-intro{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:18px}.position-explanation-label{color:var(--green)}.position-concept h2,.theory-guide-content h2,.same-string-intro h2{font-size:18px}.position-rule-list{padding-left:19px;font-size:14px;line-height:1.8}.position-rule-list li::marker{color:var(--green)}.practice-entry{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:14px;padding:18px}.practice-entry h2{text-wrap:balance;font-size:19px}.practice-entry p{color:var(--muted);font-size:13px}.practice-entry .lesson-start-actions{gap:8px}.theory-intro .practice-entry,.same-string-intro .practice-entry{border:0;border-bottom:1px solid var(--line);border-radius:0;padding:0 0 16px}.position-exercise,.position-exercise.is-wide,.exercise-card{border-radius:20px;padding:16px 12px}.exercise-meta{gap:5px 8px;font-size:12px}.exercise-meta .pill{color:var(--green);background:var(--soft);font-weight:700}.position-direction-label{color:var(--muted);font-size:12px;font-weight:500}.exercise-meta .scope-tag{font-size:11px}.position-progress{background:#edf1f4;height:4px;margin-block:12px 16px}.position-progress::-webkit-progress-bar{background:#edf1f4}.position-progress::-webkit-progress-value{background:var(--green)}.position-progress::-moz-progress-bar{background:var(--green)}.position-question-title{letter-spacing:-.5px;text-align:left;word-break:keep-all;text-wrap:balance;margin-block:0 16px;font-size:19px;line-height:1.5}.position-question-layout{margin-top:0}.position-prompt-panel{background:#f4f7f9;border:0;border-radius:12px;padding:12px}.position-response-panel{box-shadow:none;background:0 0;border:0;border-radius:0;padding:0}.position-panel-heading{border:0;gap:8px;margin-bottom:12px;padding-bottom:0}.position-question-layout .position-panel-heading h3{color:var(--ink);font-size:14px}.position-role-label{min-height:24px;color:var(--muted);background:#e8edf1;border-radius:6px;padding:2px 7px;font-size:12px}.position-role-label.is-answer{color:var(--green);background:var(--soft)}.position-question-layout.is-stacked>.position-tab-prompt{grid-template-columns:minmax(70px,.8fr) minmax(0,1.2fr);gap:12px}.position-tab-prompt .position-panel-heading{flex-wrap:wrap;gap:6px}.position-tab-prompt .position-tab{background:0 0;border:0;padding:0}.position-question-layout.is-stacked .position-tab-prompt .position-tab-row{height:20px}.position-tab-prompt .position-tab-string{font-size:11px}.position-tab-prompt .position-tab-line>span:not(:empty){color:var(--ink);background:#f4f7f9;font-size:21px}.position-tab-line:before{background:#84959e}.position-step-number{background:var(--soft);color:var(--green);border:0;border-radius:6px}.tab-answer .position-tab{background:#fff;border-color:#ccd8de;border-radius:12px}.tab-answer .position-tab-row.is-selected{background:var(--target-bg)}.tab-answer.is-solved .position-tab-row.is-selected{background:var(--soft)}.tab-answer .position-tab-line>span:not(:empty){background:#fff}.tab-answer .is-selected .position-tab-line>span{background:var(--target-bg)}.tab-answer .position-tab-pick{color:var(--muted)}.tab-fret-options{gap:5px}.tab-fret-options button{background:#fff;border-color:#cdd9de;border-radius:8px}.tab-fret-input-row input{border-color:#cdd9de;border-radius:8px}.position-question-actions{border-top:1px solid var(--line);gap:8px;padding-top:12px}.position-question-actions .button{padding-inline:10px}.position-question-actions .button.quiet{font-size:13px}.position-next-key{display:none}.fretboard-scroll{background:#fff;border-color:#e1e7eb;border-radius:8px}.fretboard-stage,.fretboard-label-rail{background:#fff}.guitar-string{stroke:#72838c}.guitar-string.is-inactive{stroke:#c7cfd4}.guitar-fret{stroke:#9cabb3}.guitar-nut{stroke:#475961}.guitar-dot,.guitar-inlay{fill:#93a4ad}.guitar-string-label{color:var(--muted)}.fretboard-band-label{color:var(--muted);margin-bottom:7px;font-size:12px}.fretboard-keyboard-help,.tab-answer-keyboard-tip{color:var(--muted);font-size:12px}.fretboard-hit.has-name .fretboard-note-symbol{color:var(--green);background:var(--soft)}.fretboard-hit:not(:disabled):hover{background:#087a6810}.note-answer-grid{gap:7px}.note-answer-grid button{min-height:52px;color:var(--ink);background:#fff;border-color:#ccd8de;border-radius:8px}.note-answer-grid button.is-accidental{color:#4c626e;background:#f5f7f9}.note-answer-grid button:hover:not(:disabled){border-color:var(--green);background:var(--soft)}.note-answer-grid button.is-selected{outline-color:var(--green);background:var(--soft)}.note-answer-grid button.is-correct{color:#fff;background:var(--green)}.note-answer-grid button.is-revealed{color:var(--target-ink);background:var(--target-bg)}.note-answer-grid button.is-wrong{color:var(--error-ink);background:var(--error-bg)}.note-answer-grid button small{color:var(--muted)}.note-answer-grid button.is-correct small{color:#fff}.same-string-question{gap:20px;margin-top:16px}.same-string-neck{border-color:var(--line);background:#f8fafb}.same-string-fret{stroke:#aab8bf}.same-string-string{stroke:#c7cfd4}.same-string-string.is-active{stroke:#566e79}.same-string-steps{gap:6px}.same-string-steps>span{background:#f4f7f9;border-color:#0000;border-radius:6px}.same-string-steps .is-current{color:var(--green);background:var(--soft);border-color:#a7d8cc}.same-string-steps .is-done{color:var(--green);border-color:var(--line);background:#fff}.natural-sequence-notes>span{color:#526872;background:#f0f4f6;border-radius:10px}.natural-sequence-notes .is-source,.natural-sequence-notes .is-done{background:var(--soft);color:var(--green)}.natural-sequence-notes .is-current{outline-color:var(--green);background:#fff}.feedback,.position-hint,.theory-hint{border-radius:12px}.feedback.error{color:var(--error-ink);background:var(--error-bg)}.feedback.success{color:var(--green);background:var(--soft)}.correct-answer-dialog{border-color:var(--line);background:#fff;border-radius:24px;padding:28px 22px 22px;box-shadow:0 20px 70px #22313926}.correct-answer-dialog::backdrop{background:#22313966}.correct-answer-mark{background:var(--soft);width:56px;height:56px;color:var(--green)}.correct-answer-dialog h2{font-size:23px}.lesson-card,.home-side,.practice-invite,.progress-card,.score-card,.result-detail,.weak-card,.history-card,.next-recommendation{border-color:var(--line);border-radius:var(--radius);background:#fff}.home-side{overflow:hidden}.home-side .progress-card,.home-side .practice-invite{border-radius:0}.lesson-card h2{color:var(--ink);font-size:27px}.card-foot{flex-wrap:wrap}.path-step,.next-check{border-color:var(--line)}.path-number,.history-icon,.recommend-icon{color:var(--green);background:var(--soft);border-radius:10px}.learning-path{border-color:var(--line);background:0 0}.curriculum-heading h2{font-size:18px}.curriculum-start{background:#edf2f5;border:0;border-radius:16px;padding:14px 16px}.curriculum-outline{border-color:var(--line);background:#fff;border-radius:20px}.curriculum-section-heading{border-color:var(--line);background:#fff;padding:16px}.curriculum-section-heading .eyebrow{color:var(--green)}.curriculum-list li{gap:8px;padding:16px 12px}.curriculum-number{color:var(--muted);flex-basis:22px}.curriculum-sublessons{gap:0;margin-top:10px}.curriculum-sublessons a{background:#fff;border:0;border-radius:0;gap:10px;padding:13px 0}.curriculum-sublessons a+a{border-top:1px solid #edf1f4}.curriculum-sublessons a:hover{background:#f6faf9}.curriculum-subnumber{text-align:center;white-space:nowrap;min-width:43px;color:var(--green);background:var(--soft);border-radius:6px;flex-shrink:0;padding:3px 5px;font-size:11px}.curriculum-sublessons strong{color:var(--ink);font-size:14px}.curriculum-sublessons small{color:var(--muted);word-break:keep-all;overflow-wrap:anywhere;line-height:1.6}.curriculum-sublessons svg{width:16px;color:var(--muted)}.curriculum-pending{color:var(--muted)}.mode-tabs,.lesson-tabs{background:#edf1f4;border-radius:12px}.mode-tabs button,.lesson-tabs button{border-radius:8px}.board-view-controls select{color:var(--ink);border-color:#cdd9de;border-radius:8px}.position-result-stats{border-color:var(--line)}.position-result-stats dt{color:var(--muted)}}@container app (width<=380px){.app-header{padding-inline:12px}main{padding-inline:10px}.brand{font-size:16px}.position-topbar .position-lesson-nav.is-compact a{min-width:43px;padding-inline:4px;font-size:12px}.position-topbar>a{font-size:12px}.position-question-title{font-size:18px}.position-question-actions{flex-wrap:wrap}.position-question-actions>div{min-width:0}}