:root{color-scheme:dark;--bg:#121b1f;--panel:#1d2b2e;--ink:#f4f2e9;--muted:#b0bcb7;--line:#43534f;--mint:#b6e4cc;--gold:#edc882;--red:#ffaaa2}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Segoe UI',system-ui,sans-serif;font-size:16px}button,input,select{font:inherit;color:var(--ink);border:1px solid var(--line);border-radius:9px;background:#243237;min-height:40px}button{cursor:pointer;padding:9px 15px}button:hover{background:#33463f;border-color:var(--mint)}button:disabled{opacity:.45;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}[hidden]{display:none!important}
.app{max-width:1160px;margin:auto;padding:16px 24px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:14px}.brand{display:flex;gap:10px;align-items:center;font-size:21px;font-weight:700}.brand svg{width:23px;height:27px;color:var(--mint)}.header-actions{display:flex;align-items:center;gap:12px}#offline-status{display:none}main{display:block}.workspace{border:1px solid #3b4c47;border-radius:18px;background:var(--panel);padding:18px 24px}.practice-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:14px}.modes{display:flex;gap:5px;background:#121e21;padding:4px;border-radius:11px}.modes button{border:0;background:transparent;color:var(--muted);font-size:15px;font-weight:600;padding:9px 18px}.modes button.selected{background:var(--mint);color:#10271e}.quiet{background:transparent;color:var(--muted);font-size:15px}.primary{background:var(--mint);color:#10271e;border-color:var(--mint);font-size:19px;font-weight:700;min-height:50px;display:flex;align-items:center;justify-content:center;gap:14px}.primary:hover{background:#ceefde;color:#10271e}.eyebrow{font-size:13px;letter-spacing:.1em;font-weight:700;line-height:1.5;color:var(--muted);margin:0}.workspace-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px}.root-tag{color:var(--gold);font-size:13px}.play-area{display:grid;grid-template-columns:minmax(360px,1.2fr) minmax(300px,1fr);gap:38px;align-items:center}.diagram-wrap{min-width:0}.diagram{--cell:clamp(46px,7vh,66px);display:grid;grid-template-columns:28px repeat(6,minmax(0,1fr));grid-template-rows:30px 44px repeat(5,var(--cell));user-select:none;width:100%;max-width:540px;margin:auto}.string-label{text-align:center;font-size:16px;font-weight:700;align-self:center;color:#bac8c0}.fret-label{display:flex;align-items:center;font-size:15px;font-weight:700;color:var(--muted)}.fret-label.anchor{color:var(--gold)}.open-cell{padding:0;border:0;background:transparent;font-size:26px;color:#aabbb4;position:relative;min-width:0}.open-cell.sounding{color:var(--mint)}.open-cell .open-note{font-size:11px;display:block;line-height:12px}.fret-cell{position:relative;padding:0;border:0;border-radius:0;min-width:0;background:transparent;min-height:40px;isolation:isolate}.fret-cell:before{content:'';position:absolute;width:var(--string-width,2px);height:100%;left:calc(50% - 1px);top:0;background:#aabbb4;opacity:.65;z-index:-1}.fret-cell:after{content:'';position:absolute;height:3px;background:#a8b8b1;bottom:0;left:0;width:100%;z-index:-1;opacity:.85}.fret-cell.edge-left:after{left:50%;width:50%}.fret-cell.edge-right:after{width:50%}.fret-cell.first{border-top:4px solid #c0ccc5}.fret-cell.nut{border-top-width:7px}.fret-cell:hover{background:#b6e4cc12}.dot{display:inline-flex;width:44px;height:44px;border-radius:50%;background:var(--mint);color:#112920;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 2px 0 #0d141e55}.dot.root{background:var(--gold);color:#302514}.dot b{font-size:18px;line-height:1.1;font-weight:800}.dot small{font-size:12px;font-weight:600}.dot small:only-child{font-size:18px}.fret-cell:disabled,.open-cell:disabled{opacity:1;cursor:default}.fret-cell:disabled:hover,.open-cell:disabled:hover{background:transparent}.fret-cell.first:disabled:hover{border-color:#c0ccc5}.string-label.listening-string{color:#17251c;background:var(--gold);border-radius:6px;padding:3px}.fret-cell.listening-string{background:#edc88218}.fret-navigation{display:flex;align-items:center;justify-content:space-between;gap:10px;max-width:540px;margin:0 auto 6px;padding-left:28px}.fret-navigation>span{font-size:15px;font-weight:600;color:var(--muted)}.fret-navigation .quiet{padding:6px 12px;min-height:36px}.diagram-tools{display:flex;justify-content:center;gap:12px;margin-top:12px}.grid-help{font-size:13px;line-height:1.5;text-align:center;color:var(--muted);margin:10px 0 0}.outside-view{color:var(--gold);font-size:13px;margin:8px 0;line-height:1.5}
.answer-area{min-width:0;padding:8px 0}.answer-area .eyebrow{color:var(--mint)}.chord-name{font-size:clamp(48px,6vw,78px);line-height:1.08;font-weight:800;letter-spacing:-.05em;margin:8px 0;overflow-wrap:anywhere}.chord-name.long{font-size:48px}.chord-description{font-size:20px;color:var(--muted);margin:8px 0 14px;line-height:1.4}.tones{display:flex;gap:7px;flex-wrap:wrap}.tone-chip{background:#122024;border:1px solid var(--line);border-radius:8px;padding:7px 12px;display:flex;flex-direction:column;gap:3px;text-align:center}.tone-chip b{font-size:19px}.tone-chip small{font-size:13px;color:var(--mint)}.alternatives{font-size:14px;color:var(--muted);line-height:1.5}.alternatives:empty{display:none}.feedback{margin:16px 0;font-size:16px;line-height:1.5;color:var(--muted)}.feedback.correct{color:var(--mint);font-weight:700}.feedback.wrong,.feedback.failed{color:var(--red)}.feedback.paused{color:var(--gold)}.game-actions{display:flex;flex-wrap:wrap;gap:8px}.game-actions>.primary{flex-basis:100%;width:100%}.game-info{display:flex;gap:30px;border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.game-info>div{display:flex;flex-direction:column;gap:4px}.game-info>div>span{font-size:12px;color:var(--muted)}.game-info strong{font-size:25px}.game-info small{font-size:17px;color:var(--muted);font-weight:500}.game-info .urgent{color:var(--gold)}.round-info{display:flex;justify-content:space-between;gap:15px;color:var(--muted);margin:0 0 12px;font-size:15px}.round-info strong{color:var(--mint)}#guess-input{width:100%;background:#111e23;border:2px solid #a8cfba;padding:10px 14px;font-size:42px;font-weight:700;margin:12px 0}#guess-form>.primary{width:100%}#open-audio{margin-top:12px;width:100%;min-height:36px}.listening-panel{border-top:1px solid var(--line);padding-top:14px;margin:14px 0}.listening-panel #listen-status{font-size:20px;line-height:1.45;font-weight:600;color:var(--ink);margin:12px 0}.listen-heard{font-size:16px;line-height:1.5;color:var(--mint);margin:8px 0;min-height:48px}.listen-heard:empty{display:none}.voice-cue{font-size:14px;color:var(--muted);margin:10px 0}.listen-actions{display:flex;gap:8px;flex-wrap:wrap}.string-progress{display:flex;gap:6px;margin-top:12px}.string-progress span{display:flex;align-items:center;justify-content:center;flex:1;min-height:36px;border:1px solid var(--line);border-radius:6px;color:var(--muted);font-weight:700}.string-progress .current{color:#1d291c;background:var(--gold);border-color:var(--gold)}.string-progress .done{color:var(--mint);border-color:var(--mint)}.calibrating .listening-panel{border:0;padding:0;margin:0}.calibrating #feedback,.calibrating #game-info,.calibrating .diagram-tools,.calibrating #outside-view{display:none}.playing #feedback:not(.correct):not(.wrong):not(.failed):not(.paused){display:none}
/* Settings and device diagnostics are secondary surfaces, never above the guitar. */
dialog{background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:16px;max-width:640px;width:calc(100% - 48px);max-height:90vh;overflow:auto;padding:24px}dialog::backdrop{background:#071014cc}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}h2{font-size:24px;margin:0}.setup-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.setup-fields label{display:flex;flex-direction:column;gap:7px;font-size:15px;color:var(--muted)}.setup-fields input,.setup-fields select{width:100%;padding:8px 10px;background:#122024;min-width:0}.setup-fields small{font-size:12px}.root-control{display:flex;gap:12px;align-items:center}.root-control input{flex:1;width:60px}.root-control>span{font-size:24px;color:var(--gold);font-weight:700}.limit-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px;grid-column:1 / 3}#setup-note,dialog>p{font-size:14px;line-height:1.5;color:var(--muted)}.dot-labels{display:flex;align-items:center;flex-wrap:wrap;gap:12px 18px;margin:20px 0;padding-top:16px;border-top:1px solid var(--line);font-size:15px}.dot-labels>span{flex-basis:100%;color:var(--muted)}.dot-labels label{display:flex;align-items:center;gap:8px;cursor:pointer}.dot-labels input{width:20px;height:20px;min-height:0;accent-color:var(--mint)}.score-strip{display:flex;gap:30px;padding-top:18px;border-top:1px solid var(--line)}.score-strip div{display:flex;flex-direction:column;gap:4px}.score-strip strong{font-size:26px}.score-strip span{font-size:14px;color:var(--muted)}.bottom-note{font-size:14px;color:var(--muted);line-height:1.5}.bottom-note>div{display:none}.bottom-note p{margin:16px 0}.audio-actions{display:flex;flex-wrap:wrap;gap:10px}#extra-check{margin-top:20px;color:var(--muted)}summary{cursor:pointer;padding:8px 0}#extra-check label{display:inline-flex;align-items:center;gap:8px;margin:12px 12px 10px 0}#extra-check select{padding:6px}#check-fret{width:64px;padding:6px}.history-row{display:flex;justify-content:space-between;gap:15px;padding:15px 0;border-bottom:1px solid var(--line);font-size:15px}.storage-warning{padding:12px;background:#612e2e;border-radius:8px}.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}
@media(max-width:850px){.app{min-width:760px;padding:12px 16px}.workspace{padding:14px 18px}.play-area{grid-template-columns:minmax(340px,1.1fr) minmax(270px,1fr);gap:22px}.modes button{padding:8px 12px}.chord-name{font-size:52px}.chord-name.long{font-size:40px}.diagram{--cell:48px}.dot{width:39px;height:39px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.calibrating .fret-navigation,.calibrating #root-tag{visibility:hidden}.playing #clear:disabled{display:none}.playing #reset{display:none}
/* Keep the live exercise to one prompt and one primary action. */
.play-area{align-items:start}.answer-area{padding-top:6px}.playing #chord-prompt .chord-name{font-size:58px}.playing #chord-prompt .chord-description{font-size:18px;margin:4px 0 10px}.playing #listen-heading{display:none}.calibrating #listen-heading{display:block}.playing .listening-panel{margin:10px 0;padding-top:4px}.playing .listen-heard{min-height:0;margin:8px 0}.playing .listening-panel #listen-status{font-size:19px;margin:10px 0}.voice-cue{margin:8px 0;font-size:14px}.game-info{padding:8px 0;margin:8px 0;border-block:1px solid var(--line);gap:24px}.game-info>div{flex-direction:row;align-items:center;gap:8px}.game-info>div>span{font-size:12px}.game-info strong{font-size:20px;white-space:nowrap}.session-tools{display:flex;justify-content:space-between;gap:10px;margin-top:10px}#open-audio{margin:0;width:auto}.round-tools{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.audio-actions{margin-top:12px}#play-again{order:0}.string-progress{margin-top:8px}.playing .diagram-tools:has(#clear:disabled){display:none}

.session-tools{flex-wrap:wrap}.session-tools .quiet{font-size:14px;padding:8px 10px}.session-tools #open-audio{margin-left:auto}.open-cell{line-height:1}

/* Keep Retry beside the next action, with completed input cues out of the way. */
.game-actions:has(#retry-question:not([hidden]))>.primary{flex:1;width:auto;flex-basis:0}
#retry-question{min-height:50px;font-size:18px;padding-inline:22px}
.question-complete:not(.calibrating) #string-progress,.question-complete:not(.calibrating) #listen-status,.question-complete:not(.calibrating) #listen-heard{display:none}

.wide-dialog{max-width:980px}.wide-dialog h3{font-size:19px;margin:20px 0 10px}.wide-dialog table{border-collapse:collapse;width:100%;font-size:14px}.wide-dialog th,.wide-dialog td{padding:8px;border-bottom:1px solid var(--line);text-align:left}.wide-dialog th{font-weight:600}.review-table{max-height:280px;overflow:auto}.review-table th:first-child{min-width:120px}.review-table td:nth-child(2){width:34%;color:var(--muted)}.review-table input{width:100%;min-width:140px;padding:8px;background:var(--bg);font-size:14px}.review-table select{padding:8px;background:var(--bg);font-size:14px}.review-note-label{display:block;margin:16px 0 8px}#review-notes{box-sizing:border-box;width:100%;resize:vertical;background:var(--bg);color:var(--ink);font:inherit;padding:10px;border:1px solid var(--line);border-radius:8px}.review-actions{display:flex;gap:10px;align-items:center;margin-top:12px;flex-wrap:wrap}.review-actions .primary{margin-left:auto}.review-disclosure{font-size:12px!important}#next-plan{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px}#next-plan li{display:flex;flex-direction:column;gap:4px;font-size:14px}#next-plan li span{color:var(--muted);line-height:1.4}#career-chart{max-height:460px;overflow:auto;margin-top:14px;border:1px solid var(--line)}#career-chart table{width:max-content;min-width:100%}#career-chart th:first-child{position:sticky;left:0;background:var(--bg);min-width:150px;z-index:1}#career-chart thead th{position:sticky;top:0;background:var(--bg);z-index:2;text-align:center}#career-chart thead th:first-child{z-index:3}#career-chart th small{display:block;font-weight:400;font-size:11px;margin-top:4px}#career-chart td{padding:4px}.career-cell{min-width:56px;padding:10px 6px;font-weight:700;border-radius:5px}.green{background:#a8d6bb;color:#10271e}.yellow{background:#e7cc7a;color:#32290c}.red{background:#d98b85;color:#321310}.untested{background:#28373a;color:#b1bfbd}.career-legend{display:flex;flex-wrap:wrap;gap:8px;font-size:12px}.career-legend span{padding:5px 8px;border-radius:4px}#career-detail{min-height:44px}

.web-project-links{max-width:1120px;margin:24px auto;padding:18px 24px;border-top:1px solid var(--line);display:flex;align-items:center;gap:22px;flex-wrap:wrap;font-size:14px}.web-project-links a{color:var(--mint)}