:root{--teal:#469d9e;--dark:#225b5d;--ink:#172a2b;--muted:#526c6d;--pale:#eef5f4;--line:#d8e5e4}
*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font:17px/1.65 Arial,Helvetica,sans-serif}a{color:var(--dark);text-underline-offset:4px}button,input,textarea,select{font:inherit}button,summary{cursor:pointer}button,a,input,textarea,select,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:4px}h1,h2,h3,h4,p{margin-top:0}p{margin-bottom:20px}h2,h3,h4{line-height:1.3}h3{font-size:19px;margin-bottom:12px}h4{font-size:17px;margin-bottom:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;top:-100px;background:white;padding:12px;z-index:20}.skip:focus{top:0}
.topbar{background:var(--dark);padding:20px max(26px,calc((100vw - 1080px)/2));display:flex;align-items:center;justify-content:space-between;gap:24px}.topbar img{display:block;width:220px;height:auto}.pdf-link{color:white;font-size:14px;text-decoration:none}main{max-width:1080px;margin:auto;padding:0 40px 60px;outline:none}
.home-intro{padding:55px 0 35px;max-width:800px}.eyebrow{font-size:12px;letter-spacing:1.5px;color:var(--muted)}.home-intro h1{font-size:52px;line-height:1.1;letter-spacing:-1.5px;margin-bottom:22px}.lead{font-size:20px;max-width:720px}.section-heading h2{font-size:26px}.section-heading p{color:var(--muted)}.move-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.move-card{display:grid;grid-template-columns:100px 1fr;gap:18px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line);padding:0 0 18px}.move-card img{width:100%;aspect-ratio:1.4;object-fit:contain;background:var(--pale)}.move-card .artist{font-size:12px;margin-bottom:6px}.move-card h3{font-size:19px;font-weight:normal;margin-bottom:0}.move-card:hover h3{text-decoration:underline}.home-help{max-width:760px;margin:60px auto 30px}.home-help details{border-top:1px solid var(--line);padding:18px 0}.home-help summary{color:var(--dark);font-size:16px}.home-help details p:first-of-type{margin-top:18px}.footer-note{font-size:13px;color:var(--muted);margin-top:45px;text-align:center}
.worksheet-nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:16px;background:white;border-bottom:1px solid var(--line);padding:12px 0;box-shadow:0 8px 12px -12px #172a2b55}.picker{flex:1;min-width:130px;max-width:230px}.picker select{width:100%;font-size:14px;color:var(--ink);border:1px solid var(--line);border-radius:3px;background:var(--pale);padding:10px}.jump-links{display:flex;align-items:center;gap:18px;font-size:14px}.jump-links a{text-decoration:none;padding:10px 0;border-bottom:3px solid transparent;white-space:nowrap}.jump-links a[aria-current]{border-color:var(--teal);font-weight:bold;color:var(--ink)}.jump-links a:hover{text-decoration:underline}.song-arrows{display:flex;align-items:center;gap:7px}.song-arrows a{text-decoration:none;font-size:14px;padding:9px 10px;border:1px solid var(--line);border-radius:3px}.song-arrows .files-jump{border:0;font-size:12px;padding-left:0}
.worksheet-heading{max-width:900px;margin:auto;padding:16px 0 20px}.back-library{display:inline-block;font-size:13px;margin-bottom:12px}.song-context{display:grid;grid-template-columns:150px 1fr;gap:25px;align-items:center}.source-thumbnail img{width:100%;aspect-ratio:1.777;object-fit:contain;background:var(--pale);display:block}.artist{color:var(--muted);font-size:13px;margin-bottom:4px}.worksheet-heading h1{font-size:36px;line-height:1.1;letter-spacing:-.8px;margin:0 0 8px}.lesson-outcome{font-size:19px;color:var(--dark);margin-bottom:10px}.song-links{display:flex;gap:22px;font-size:13px}.song-observation{font-size:16px;margin:16px 0 0;max-width:900px}
.lesson-stage,.concept-recap,.share-work,.worksheet-reference,.worksheet-bottom{max-width:900px;margin-left:auto;margin-right:auto}.lesson-stage{scroll-margin-top:110px;padding:32px 0 36px;border-top:1px solid var(--line)}.stage-title{display:flex;align-items:center;gap:14px;font-size:28px;letter-spacing:-.5px;margin-bottom:24px}.stage-number{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:36px;height:36px;border:1px solid var(--teal);border-radius:50%;font-size:16px;font-weight:normal;color:var(--dark);letter-spacing:0}.song-moment{font-size:14px;border-left:3px solid var(--teal);padding:0 0 0 16px;margin-bottom:24px;color:var(--dark)}.listening-work{padding-top:24px}.listening-work .stage-title{margin-bottom:18px}.listening-work .song-moment{margin-bottom:16px}.listen-for{max-width:780px}.player{background:var(--pale);padding:22px;border-radius:4px;margin:20px 0 24px}.player-controls{display:flex;align-items:center;gap:18px}.play{border:0;background:var(--dark);color:white;border-radius:50%;width:54px;height:54px;flex-shrink:0;font-size:22px}.version-switch{display:flex;gap:7px;flex-wrap:wrap}.version-switch button{background:white;border:1px solid var(--line);padding:8px 12px;border-radius:3px;color:var(--dark);font-size:14px}.version-switch button[aria-pressed=true]{background:var(--dark);color:white;border-color:var(--dark)}.transport{display:flex;align-items:center;gap:18px;margin-top:18px}.transport input{width:100%;accent-color:var(--teal)}.transport output{font-size:13px;white-space:nowrap;color:var(--muted)}.audio-note{font-size:13px;color:var(--muted);margin:12px 0 8px}.loop{font-size:13px;color:var(--muted)}.loop input{accent-color:var(--teal)}
.chart-heading{display:flex;justify-content:space-between;align-items:baseline;gap:20px}.chart-heading h3{margin:0}.chart-heading span{color:var(--muted);font-size:12px}.chord-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;margin:6px 0}.bar{background:var(--pale);border-bottom:3px solid transparent;padding:7px 3px;text-align:center}.bar strong{font-weight:normal;font-size:16px}.bar.playing{border-color:var(--teal);background:#dcecea}.recording-score,.starter-score{display:block;width:100%;height:auto;background:white}.score-options{display:flex;gap:12px;align-items:center;margin:8px 0;font-size:13px;color:var(--muted)}.score-options button{padding:5px 0;border:0;background:transparent;color:var(--dark);font-size:13px;text-decoration:underline;text-underline-offset:3px}.score-options button[aria-pressed=true]{color:var(--ink);font-weight:bold;text-decoration:none}.score-caption,.file-note{font-size:13px;color:var(--muted)}.musical-explanation{margin:28px 0 0;scroll-margin-top:110px}.musical-explanation>h3{font-size:16px;color:var(--muted);font-weight:normal;margin-bottom:8px}.concept-name{font-size:23px;color:var(--dark);margin-bottom:14px}.application{color:var(--dark);margin-bottom:20px}.next-task{display:inline-block;font-size:15px;font-weight:bold;text-decoration:none;padding:12px 0;margin-top:8px}.next-task span{margin-left:12px}.next-task:hover{text-decoration:underline}
.starter{padding-bottom:8px}.role-label{display:block;font-size:12px;font-weight:bold;color:var(--muted);margin:10px 0 5px}.notation-key{font-size:12px;color:var(--muted);margin-bottom:14px}.starter-phrase,.note-guide{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}.starter-phrase{margin:5px 0 12px}.starter-phrase>div{background:white;border:1px solid var(--line);padding:8px 4px;text-align:center}.starter-phrase strong{font-size:16px;font-weight:normal}.note-guide span{font-size:13px;text-align:center;background:#e4efed;padding:7px 2px;border-radius:3px}.starter-score{margin:18px 0 10px}.starter-options{display:flex;gap:7px;margin:15px 0 10px}.starter-options button{padding:7px 10px;background:white;color:var(--dark);border:1px solid var(--line);border-radius:3px;font-size:13px}.starter-options button[aria-pressed=true]{background:var(--dark);color:white}audio{display:block;width:100%;height:42px}.starter-help{font-size:12px;color:var(--muted);margin:10px 0}.starter-hint{font-size:14px;margin-bottom:10px}.experiments{margin-top:25px}.experiments>h3{font-size:20px;margin-bottom:20px}.experiment{padding:0 0 4px 18px;border-left:2px solid var(--line);margin-bottom:22px}.experiment h4{font-size:18px;margin-bottom:8px}.experiment-number{color:var(--dark);font-weight:normal}.experiment p{font-size:16px;margin-bottom:0}
.transfer{background:var(--pale);padding:30px;margin-top:8px;border:0;border-radius:4px}.transfer-bridge{font-size:15px;color:var(--dark);margin-bottom:22px}.transfer .starter-score{margin:18px 0}.transfer audio{margin-bottom:20px}.transfer h3{margin-top:24px}.transfer-explanation{font-size:16px}.downloads{display:flex;flex-wrap:wrap;gap:12px 22px;margin:18px 0;font-size:14px}.transfer .downloads{font-size:13px}.writing-work{background:white;border:0;border-radius:0;padding:40px 0 28px;margin-top:14px}.listening-check{border-left:3px solid var(--teal);padding-left:18px;margin:24px 0}.listening-check h3{font-size:18px}.listening-check p{font-size:16px;margin-bottom:0}.notes-label{display:block;margin:24px 0 10px;font-size:15px;font-weight:bold;color:var(--dark)}textarea{width:100%;min-height:180px;border:1px solid var(--line);padding:18px;border-radius:3px;resize:vertical;line-height:1.7;background:#fafcfc;font-size:16px}.save-hint{font-size:12px;color:var(--muted);margin:10px 0 0;max-width:400px}.stopping-point{font-size:14px;color:var(--muted);margin:24px 0 0}.button{display:inline-block;border:0;background:var(--dark);color:white;text-decoration:none;padding:12px 18px;border-radius:3px;font-size:15px;line-height:1.5}.button:hover{background:#163f40}
.concept-recap{background:var(--dark);color:white;border:0;border-radius:4px;padding:32px 36px;margin-top:12px;scroll-margin-top:110px}.recap-label{font-size:14px;margin-bottom:12px}.concept-recap h2{font:normal clamp(28px,4vw,38px)/1.2 Georgia,serif;letter-spacing:-.4px;margin-bottom:18px}.method-pattern{font-size:clamp(21px,3vw,27px);font-weight:bold;line-height:1.4;margin-bottom:18px}.method-description{font-size:16px;max-width:760px;margin-bottom:0}.share-work{margin-top:28px;margin-bottom:28px;font-size:14px}.share-work h3{font-size:16px}.worksheet-reference{padding-top:25px;margin-top:30px;border-top:1px solid var(--line);scroll-margin-top:110px}.worksheet-reference h2{font-size:24px}.worksheet-reference>p{font-size:15px}.worksheet-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:35px;font-size:14px}.book-footer{border-top:1px solid var(--line);padding:25px 40px;max-width:1080px;margin:auto;display:flex;justify-content:space-between;gap:24px;font-size:14px;align-items:flex-start}.book-footer>details{padding:0;border:0;max-width:340px}.book-footer a{text-decoration:none}.notebook-tools{display:grid;gap:14px;padding-top:20px}.notebook-tools button{border:0;color:var(--dark);background:var(--pale);padding:12px}.import-label{cursor:pointer;color:var(--dark)}#save-status{font-size:13px;color:var(--muted)}
@media(max-width:900px){.worksheet-nav{flex-wrap:wrap;gap:6px 16px}.picker{max-width:420px}.jump-links{order:3;width:100%;justify-content:space-between;gap:14px}.lesson-stage,.musical-explanation,.concept-recap,.worksheet-reference{scroll-margin-top:145px}.song-context{grid-template-columns:120px 1fr}.stage-title{font-size:25px}.transfer{padding:26px}}
@media(max-width:650px){main{padding:0 20px 45px}.topbar{padding:16px 20px}.topbar img{width:170px}.pdf-link{font-size:12px;max-width:85px;text-align:right}.home-intro{padding:40px 0 25px}.home-intro h1{font-size:40px}.lead{font-size:18px}.move-cards{grid-template-columns:1fr;gap:22px}.move-card{grid-template-columns:90px 1fr;gap:15px}.worksheet-nav{padding:8px 0}.picker{min-width:0}.picker select{font-size:13px}.jump-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:4px;font-size:12px}.jump-links a{text-align:center;white-space:normal;padding:8px 2px;line-height:1.3;min-height:46px;display:flex;align-items:center;justify-content:center}.song-arrows a{padding:8px;font-size:13px}.song-arrows .files-jump{font-size:12px}.song-context{grid-template-columns:85px 1fr;gap:15px}.worksheet-heading h1{font-size:28px}.lesson-outcome{font-size:16px}.song-links{flex-wrap:wrap;gap:7px 14px;font-size:12px}.song-observation{font-size:16px}.stage-title{font-size:23px;gap:10px}.stage-number{width:30px;height:30px;font-size:14px}.lesson-stage{padding-top:26px}.player{padding:18px}.player-controls{gap:12px;align-items:flex-start}.version-switch{flex:1;flex-direction:column}.transport{display:block}.transport output{display:block;margin-top:8px}.chart-heading{align-items:flex-start}.chart-heading h3{font-size:17px}.note-guide span{font-size:11px}.starter-phrase strong{font-size:14px}.transfer{padding:22px 18px}.concept-recap{padding:26px 22px}.book-footer{display:block;padding:25px 20px}.book-footer>*{display:block;margin-bottom:20px}}
@media print{.concept-recap{background:white;color:#172a2b;border:2px solid #225b5d}}

.practice-transport{display:flex;align-items:center;gap:14px;margin:8px 0 12px}.sample-play{border:0;border-radius:50%;background:var(--dark);color:white;width:42px;height:42px;flex-shrink:0;font-size:18px}.practice-transport input{min-width:0;flex:1;accent-color:var(--teal)}.practice-transport output{font-size:12px;color:var(--muted);min-width:55px}.transfer .practice-transport{margin-bottom:12px}audio[hidden]{display:none}

.audio-note:empty,.starter-help:empty{display:none}