:root{--lime:#d3ee8a;--line:#344138;--muted:#a6b5ac}*{box-sizing:border-box}body{margin:0;background:#101615;color:#eef3ea;font:16px system-ui,sans-serif}aside{width:230px;position:fixed;inset:0 auto 0 0;padding:34px 24px;border-right:1px solid var(--line);background:#141c18}.brand{color:var(--lime);text-decoration:none;font-weight:800;font-size:34px;display:flex;align-items:center;gap:12px}.brand span{font-size:12px;letter-spacing:2px;max-width:90px}.eyebrow{font-size:12px;letter-spacing:1.8px;color:var(--muted);margin-top:56px}nav button{width:100%;text-align:left;background:none;border:0;color:#a9b6ad;padding:15px 12px;margin:3px 0}nav button.active{background:var(--lime);color:#182117}.asidebottom{position:absolute;bottom:35px;font-size:24px;line-height:1.5}.asidebottom span{color:var(--muted)}main{margin-left:230px;padding:0 42px}header{height:94px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:12px;letter-spacing:1.5px}h1{font-size:clamp(30px,4vw,48px);letter-spacing:-2px;margin:14px 0}h2{font-size:23px}h3{font-size:18px}p{line-height:1.65;color:var(--muted)}.intro{margin:32px 0}.tag{font-size:12px;color:var(--lime);letter-spacing:2px}.grid{display:grid;grid-template-columns:1.5fr 1fr;gap:22px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}.card{background:#1b2421;border:1px solid var(--line);border-radius:14px;padding:25px}.hero{background:#d3ee8a;color:#1d2b1b}.hero p{color:#3b5036}.hero h2{font-size:34px}.hero .tag{color:#4e643a}.hero button{background:#1c2a1b;color:white}.metric{font-size:35px;font-weight:700}.small{font-size:14px}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}button,select,input{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:8px;padding:11px 18px;background:#2e3b31;color:#edf4e9}button:hover{filter:brightness(1.12)}button.primary{background:var(--lime);color:#192319;border:0}select,input[type=number]{background:#18221b;color:#eef3ea;border:1px solid #435348;border-radius:7px;padding:10px;max-width:100%}input[type=range]{accent-color:var(--lime);width:180px}label{font-size:14px;color:var(--muted)}footer{font-size:12px;color:#8c9d91;padding:26px 0}.lesson{padding:16px 0;border-bottom:1px solid var(--line)}.lesson button{float:right}.pill{display:inline-block;border:1px solid #56614d;border-radius:20px;font-size:12px;padding:5px 10px;color:var(--muted)}.note{font-size:80px;font-weight:800;color:var(--lime);text-align:center;margin:15px}.meter{height:12px;background:linear-gradient(90deg,#ac6748,#d3ee8a 45%,#d3ee8a 55%,#ac6748);border-radius:9px;position:relative;margin:26px 0}.needle{position:absolute;left:50%;top:-7px;height:26px;width:3px;background:white}.highway{display:flex;gap:10px;overflow:auto;padding:32px 0;border-block:1px solid var(--line);margin:24px 0}.target{min-width:70px;text-align:center;padding:22px 10px;background:#26352b;border-radius:10px}.target.current{background:var(--lime);color:#1c2819}.target.hit{outline:2px solid #7aceab}.sequencer{display:grid;grid-template-columns:70px repeat(16,1fr);gap:5px;margin:22px 0}.step{padding:0;height:32px;border-radius:4px}.step.on{background:var(--lime)}.step.play{outline:2px solid white}.keys{display:flex;gap:30px;justify-content:center;margin:30px 0}.keycol{text-align:center}.key{border:2px solid #637667;border-radius:50%;width:58px;height:58px;margin:12px auto;display:grid;place-items:center}.key.closed{background:var(--lime);color:#152215;border-color:var(--lime)}.chords{display:flex;gap:12px;margin:22px 0}.chord{flex:1;padding:18px;background:#2c3b2e;border-radius:9px}.chord.active{background:var(--lime);color:#1a2717}.chord small{display:block;margin-top:10px}.steps li{margin:15px 0;line-height:1.7;color:#bfcec2}progress{accent-color:var(--lime);width:100%}.flash{background:#d3ee8a;color:#182619;padding:12px;border-radius:8px}.chart{width:100%;height:100px}.controls{margin:18px 0}.hint{border-left:3px solid var(--lime);padding-left:15px}.tempo{font-size:42px;font-weight:700}.beat{width:24px;height:24px;border-radius:50%;background:#35483a}.beat.active{background:var(--lime)}@media(max-width:950px){aside{width:185px;padding:25px 15px}main{margin-left:185px;padding:0 24px}.grid,.cards{grid-template-columns:1fr}.asidebottom{font-size:20px}}@media(max-width:650px){aside{position:static;width:auto;padding:18px}.brand{font-size:26px}.eyebrow,.asidebottom{display:none}nav{display:flex;overflow:auto;margin-top:15px}nav button{white-space:nowrap;width:auto;padding:10px}main{margin:0;padding:0 18px}header{height:85px;gap:12px}header span{display:none}.sequencer{gap:3px;grid-template-columns:50px repeat(16,1fr)}.card{padding:19px}.chords{flex-wrap:wrap}.chord{min-width:100px}}
aside{overflow-y:auto}.asidebottom{position:static;margin-top:30px;font-size:19px}nav button{padding-top:11px;padding-bottom:11px}.eyebrow{margin-top:34px}audio{margin-top:8px}button:disabled{opacity:.55;cursor:wait}a.pill{color:var(--lime);text-decoration:none}#report .cards{grid-template-columns:1fr}#report ul{padding-left:22px}@media(min-width:1400px){#report .cards{grid-template-columns:repeat(3,1fr)}}@media(max-width:650px){.asidebottom{display:none}}
[hidden]{display:none!important}main,.card,.grid>*{min-width:0}button,select,input{touch-action:manipulation}button,select,input[type=number]{min-height:44px}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid var(--lime);outline-offset:3px}header{gap:14px;flex-wrap:wrap;height:auto;min-height:94px;padding-block:18px}header>span{flex:1}#installHelp{margin-top:22px}nav button{flex-shrink:0}.highway{overscroll-behavior-x:contain}.sequencer{overflow-x:auto;padding-bottom:12px;grid-template-columns:70px repeat(16,minmax(30px,1fr))}.step{height:44px;min-height:44px}.row>label{display:flex;align-items:center;gap:8px;flex-wrap:wrap}input[type=checkbox]{width:20px;height:20px;accent-color:var(--lime)}#pbpm,#latency,#evalBpm{width:96px}.note{overflow-wrap:anywhere}@media(max-width:650px){aside{padding-top:max(18px,env(safe-area-inset-top));padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right))}main{padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right));padding-bottom:env(safe-area-inset-bottom)}header{min-height:80px}header select{flex:1;min-width:155px;font-size:16px}header button{font-size:14px;padding-inline:12px}.brand span{max-width:none}nav{scrollbar-width:thin;padding-bottom:5px}h1{letter-spacing:-1px}.row{gap:10px}.row>label{width:100%}.chord{min-width:110px}input[type=range]{width:min(240px,100%)}.sequencer{grid-template-columns:60px repeat(16,34px)}.target{min-width:78px}#report .cards{grid-template-columns:1fr}.card .row button{flex-grow:1}#listenTimer{font-variant-numeric:tabular-nums}footer{line-height:1.6}}@media(max-width:360px){main{padding-inline:12px}.card{padding:15px}header select{min-width:140px}header button{padding-inline:8px}.note{font-size:64px}}
.filePick{display:inline-block;padding:12px;border:1px solid #637667;border-radius:8px;line-height:1.7}.filePick input{display:block;max-width:100%;margin-top:12px}#trackAudioMount{margin:22px 0}.demoLevel{min-width:48px}#trackList .row{justify-content:space-between}#trackList span{min-width:0;flex:1}footer a{color:var(--lime)}

.songLayout{display:grid;grid-template-columns:minmax(230px,1fr) minmax(0,2fr);gap:22px}.songLayout label{display:block;margin:12px 0}.songLayout input[type=search]{width:100%;box-sizing:border-box}.songChoice{display:block;width:100%;text-align:left;margin:8px 0;padding:14px;min-height:64px}.songChoice span{display:block;font-size:12px;opacity:.7;margin-top:5px}.songChoice.active{border-color:#d3ee8a}.songVideo{aspect-ratio:16/9;min-height:200px;background:#101713;border-radius:12px;display:grid;place-items:center;margin:16px 0;overflow:hidden}.songVideo p{padding:20px}.songVideo iframe{width:100%;height:100%;border:0}#songList{max-height:620px;overflow:auto}#songDetail .row{flex-wrap:wrap}@media(max-width:850px){.songLayout{grid-template-columns:1fr}#songList{max-height:310px}}

.lessonVideoPanel{padding-bottom:24px;margin-bottom:24px;border-bottom:1px solid #39433b}.lessonVideoPanel select{width:100%;max-width:100%}.lessonVideoPanel .row{flex-wrap:wrap}.lessonVideoPanel h3{overflow-wrap:anywhere}

.tutorCard{margin-top:22px}.builderNotes{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.builderNote{border:1px solid #39433b;border-radius:12px;padding:12px;width:150px}.builderNote label{display:block;margin:8px 0}.builderNote select{width:100%}.tutorEvent.current{border-color:#d3ee8a;background:#283529}.longBeat.active{background:#d3ee8a;color:#141c18}.sessionBanner,.practiceReminder{margin:14px 0;border-color:#d3ee8a}.longBeats{justify-content:center;flex-wrap:wrap}#planTime{max-width:160px}.tutorCard .row,.sessionBanner .row{flex-wrap:wrap}#tutorVoice{max-width:100%}@media(max-width:600px){.builderNote{width:calc(50% - 6px);box-sizing:border-box}.longBeat{padding:8px}.tutorEvent{min-width:95px}}

.advancedTabs{flex-wrap:wrap;margin:16px 0}.reviewChecklist label{display:block;margin:12px 0}#advancedEvidence{width:100%;box-sizing:border-box;resize:vertical;border-radius:10px;padding:12px;background:#141c18;color:inherit;border:1px solid #39433b}#advancedActivity .row{flex-wrap:wrap}.advancedTabs button{min-height:44px}

.brandSax{width:58px;height:58px;flex-shrink:0;display:block}.brand{gap:10px}@media(max-width:850px){.brandSax{width:44px;height:44px}}
@font-face{font-family:SpaceGrotesk;src:url('fonts/SpaceGrotesk.ttf') format('truetype');font-weight:300 700;font-display:swap}h1,h2,h3,.brand,.tempo,.metric,.pathStages{font-family:SpaceGrotesk,system-ui,sans-serif}.brand{gap:8px}.brand .wordmark{font-size:29px;max-width:none;letter-spacing:-1.7px;font-weight:700;white-space:nowrap}.brand .wordmarkX{font-size:inherit;letter-spacing:inherit;color:#f5d27d}.brandSax{width:38px!important;height:54px!important}aside{overflow-y:auto;padding-bottom:35px}.asidebottom{position:static;margin-top:35px;font-size:19px}.pathStages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:24px 0}.pathStages button{text-align:left;padding:16px;line-height:1.4;font-size:14px;background:#1b2924;color:#e8efe3;border:1px solid #3b4d40}.pathStages button span{display:block;color:#d3ee8a;font-size:24px;margin-bottom:6px}.pathStages button.active{background:#d3ee8a;color:#152317}.pathStages button.active span{color:#3c5130}.pathHero{border-left:4px solid #d3ee8a}.practiceBridge{margin-top:22px;border-style:dashed}.saxWorxWelcome{margin-top:28px;border-color:#8fa96a}.sax3d{height:480px;min-height:380px;position:relative;border-radius:16px;overflow:hidden;background:radial-gradient(ellipse at 50% 30%,#33443a,#101b19);margin:20px 0}.sax3d canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}.sax3d p{padding:25px}.saxKeyList{display:grid;grid-template-columns:1fr 1fr;gap:8px}.saxKeyButton{padding:11px;font-size:14px;text-align:left;min-height:46px;background:#23302a;color:#e5ebe0;border:1px solid #526046}.saxKeyButton.pressed{background:#d3ee8a;color:#192811;border-color:#d3ee8a}.customGroove .row{margin:16px 0}.customGroove input[type=text],.customGroove input:not([type]){max-width:200px}.saxFingeringGrid{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}.saxRangeCard{margin-top:22px}.wordmarkX{display:inline!important}.practiceBridge .tag{display:block;margin-bottom:14px}.saxRangeCard label,.customGroove label,.saxFingeringGrid label{font-size:14px}.saxWorxWelcome h2{font-size:30px;letter-spacing:-1px}.filePick input{max-width:220px}.pathStages button:disabled{opacity:.5}button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #f5d27d;outline-offset:3px}
@media(max-width:1100px){.saxFingeringGrid{grid-template-columns:1fr}.pathStages{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.sax3d{height:410px}.saxKeyList{grid-template-columns:1fr 1fr}.saxKeyButton{font-size:13px;padding:10px 7px}.brand .wordmark{font-size:27px}.pathStages{gap:7px}.pathStages button{padding:12px}.saxFingeringGrid .card{padding:18px}.customGroove input{max-width:100%}.saxWorxWelcome h2{font-size:25px}}
/* Labelled key explorer: roomy instrument view and grouped, finger-specific controls. */
.saxExplorerGrid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;align-items:start}.saxExplorer .sax3d{height:600px;margin:12px 0}.saxZoneNav{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0}.saxZoneNav button{font-size:13px;padding:10px 13px;min-height:44px;background:#25352c;color:#e5ebe0;border:1px solid #526046}.saxZoneNav button.active{background:#d3ee8a;color:#172417;border-color:#d3ee8a}.saxLegend{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:12px;color:#cbd5c7}.keyDot{display:inline-block;width:11px;height:11px;border:2px solid #dce5db;border-radius:50%;vertical-align:middle;margin-right:5px}.keyDot.down{background:#d3ee8a;border-color:#d3ee8a}.keyDot.focus{border-color:#ffd884}.saxModelLabels{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;font-family:SpaceGrotesk,system-ui,sans-serif}.saxModelLabel{pointer-events:auto;cursor:pointer;outline:none}.saxModelLabel:focus rect{stroke:#fff;stroke-width:3}.saxTeachingPanel{padding:18px;background:#172820;border:1px solid #40583c;border-radius:14px}.saxTeachingPanel>h3{margin-top:0;font-size:20px}.saxTeachingPanel>p{font-size:14px;line-height:1.6}.saxKeyDetail{border-left:3px solid #f5d27d;padding:12px 14px;margin:20px 0;background:#263227}.saxKeyDetail h3{margin:8px 0;font-size:19px}.saxKeyDetail p{font-size:14px;line-height:1.6;margin-bottom:0}.saxKeyDetail strong{font-size:14px;color:#f5d27d}.saxHandDiagram h4{font-size:11px;letter-spacing:1px;color:#bdccae;margin:16px 0 10px}.handKey{width:100%;display:flex;align-items:center;gap:13px;background:transparent;border:1px solid #56664c;color:#e8efe3;padding:8px 12px;text-align:left;min-height:56px;margin-bottom:7px}.handKey.pressed{background:#344d28;border-color:#d3ee8a}.handPearl{font-size:30px;line-height:1;color:#d3ee8a}.handKey small{display:block;font-size:9px;letter-spacing:1.4px;margin-top:3px;color:#bccab1}.handKey strong{margin-right:6px}.handDivider{height:1px;background:#526046;margin:20px 0}.saxKeyList{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:16px}.saxKeyGroup{padding:16px;background:#172820;border:1px solid #40533c;border-radius:12px}.saxKeyGroup h3{font-size:17px;margin:0 0 8px}.saxKeyGroup p{font-size:13px;line-height:1.5;min-height:58px;color:#bccab1;margin:0 0 14px}.saxKeyGroup .saxKeyButton{display:block;width:100%;margin-bottom:7px;position:relative;padding:12px;font-size:14px}.saxKeyButton small{display:block;font-size:9px;letter-spacing:1px;margin:4px 0 0 20px;opacity:.75}.saxKeyButton.identified{box-shadow:0 0 0 2px #ffd884}.saxRotation{justify-content:space-between}.saxRotation input{max-width:180px}.saxExplorer> .row h2{margin-bottom:8px}
@media(max-width:1100px){.saxExplorerGrid{grid-template-columns:minmax(0,1fr) 250px}.saxKeyList{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.saxExplorerGrid{grid-template-columns:1fr}.saxExplorer .sax3d{height:560px;min-height:560px}.saxTeachingPanel{padding:16px}.saxHandDiagram{display:block}.saxHandDiagram h4,.saxHandDiagram p{grid-column:1/-1}.saxHandDiagram .handDivider{display:none}.handKey{margin:0}.saxKeyList{grid-template-columns:1fr}.saxKeyGroup p{min-height:0}.saxZoneNav{gap:6px}.saxZoneNav button{font-size:12px;flex:1 0 28%;padding:10px 7px}.saxExplorer{padding:16px}.saxKeyGroup .saxKeyButton{font-size:14px}.saxLegend{font-size:11px}}

.intervalChoices{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:20px 0}.intervalChoice{text-align:left;padding:17px;background:#223228;border:1px solid #657854;color:#eef3ea;min-height:112px}.intervalChoice strong{display:block;font-size:18px;margin-bottom:8px}.intervalChoice span{display:block;font-size:14px;line-height:1.5}.intervalChoice small{display:block;margin-top:8px;color:#c4d5b5}.intervalChoice:disabled{opacity:.55;cursor:default}.intervalChoice.earCorrect{opacity:1;background:#d3ee8a;color:#152317;border-color:#d3ee8a}.intervalChoice.earCorrect small{color:#38552e}.intervalExamples{display:grid;grid-template-columns:1fr 1fr;gap:9px}.intervalExamples button{text-align:left;min-height:58px;font-size:14px}.intervalExamples small{display:block;margin-top:5px;opacity:.7}#earReplay:disabled,#earReveal:disabled{opacity:.5} @media(max-width:440px){.intervalChoice{padding:12px;min-height:130px}.intervalChoice strong{font-size:16px}.intervalChoice span{font-size:13px}.intervalExamples{grid-template-columns:1fr}}

.intervalChoice.earWrong{opacity:1;background:#6b252c;border-color:#ff909b;color:#fff0f1}.intervalChoice.earWrong small{color:#ffd3d8}.intervalChoice.earWrong:after{content:"✕ Incorrect · try again";display:block;margin-top:10px;font-size:13px;font-weight:700}.intervalChoice.earCorrect:after{content:"✓ Correct answer";display:block;margin-top:10px;font-size:13px;font-weight:700}