:root{--bg:#12151c;--panel:#1b2029;--panel-2:#232936;--text:#e8ecf3;--muted:#94a0b4;--accent:#ffb454;--correct:#3ecf7a;--wrong:#ff5f5f;--board:#4a3324;--board-edge:#2e1f16;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Hiragino Sans,Noto Sans JP,system-ui,sans-serif}#app{flex-direction:column;gap:18px;max-width:1400px;margin:0 auto;padding:20px 20px 40px;display:flex}.topbar h1{letter-spacing:.02em;margin:0 0 12px;font-size:22px}.mode-tabs{background:var(--panel);border-radius:10px;gap:6px;width:fit-content;margin-bottom:14px;padding:5px;display:flex}.mode-tab{color:var(--muted);background:0 0;padding:9px 20px;font-size:14px}.mode-tab.active{background:var(--panel-2);color:var(--text);box-shadow:inset 0 0 0 1px #3b455a}#app:not(.is-note) .mode-note,#app:not(.is-degree) .mode-degree,#app:not(.is-chord) .mode-chord{display:none}.block-picker{flex-wrap:wrap;align-items:end;gap:8px;display:flex}.block-picker label{flex-direction:column;gap:4px;display:flex}#app.scale-block .note-custom-controls,#app:not(.scale-block) .note-scale-controls{display:none}#note-scale-info{color:var(--muted);flex-basis:100%;margin:0;font-size:12px;line-height:1.6}#note-scale-info a{color:var(--accent)}#note-block-error{color:var(--wrong);flex-basis:100%;margin:0;font-size:13px}#note-block-error:empty,#app.is-chord .root-random-strings,#app.is-chord .root-fixed-pitch,#app.is-chord .root-fixed-position{display:none}.chip-picker{flex-wrap:wrap;gap:4px;display:flex}.chip{background:var(--panel-2);color:var(--muted);cursor:pointer;border:1px solid #3b455a;border-radius:999px;padding:5px 10px;font-size:13px;transition:all .12s}.chip:hover{color:var(--text);border-color:#55627d}.chip.active{background:var(--accent);border-color:var(--accent);color:#10141c;font-weight:700}#app:not(.root-random):not(.root-pitch) .root-random-strings,#app:not(.root-pitch) .root-fixed-pitch,#app:not(.root-position) .root-fixed-position{display:none}.string-picker{gap:4px;display:flex}.string-picker label{cursor:pointer;position:relative}.string-picker input{opacity:0;width:0;height:0;position:absolute}.string-picker span{background:var(--panel-2);color:var(--muted);-webkit-user-select:none;user-select:none;border:1px solid #333b4a;border-radius:6px;padding:6px 9px;font-size:12px;display:block}.string-picker input:checked+span{background:var(--accent);border-color:var(--accent);color:#221703;font-weight:700}.string-picker input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}.question-sub{color:var(--muted);margin:8px 0 0;font-size:12px}.inversion-hint{border:1px solid var(--accent);color:var(--accent);letter-spacing:.02em;background:#ffb45424;border-radius:8px;margin:10px 0 0;padding:8px 12px;font-size:15px;font-weight:700}.inversion-hint:empty{display:none}.inversion-hint.done{border-color:var(--correct);color:var(--correct);background:#3ecf7a24}.controls{flex-direction:column;display:flex}.control-row{flex-wrap:wrap;align-items:flex-end;gap:12px;padding:12px 0;display:flex}.control-row+.control-row{border-top:1px solid #94a0b433}.control-row:first-child{padding-top:0}.control-row:last-child,.control-row:last-child .control.checkbox{padding-bottom:0}.control{color:var(--muted);flex-direction:column;gap:4px;font-size:12px;display:flex}.control select{background:var(--panel-2);color:var(--text);border:1px solid #333b4a;border-radius:6px;padding:6px 10px;font-size:13px}.control input[type=range]{width:110px;accent-color:var(--accent)}.control.checkbox{flex-direction:row;align-self:flex-end;align-items:center;gap:6px;padding-bottom:7px}.control.checkbox input{accent-color:var(--accent)}.question-panel{background:var(--panel);border-radius:12px;flex-wrap:wrap;align-items:center;gap:24px;padding:18px 22px;display:flex}.question-label{color:var(--muted);margin:0;font-size:12px}.question-note{color:var(--accent);min-width:120px;margin:2px 0 0;font-size:48px;font-weight:700;line-height:1}.feedback{flex:1;min-width:200px;min-height:24px;font-size:16px;font-weight:600}.feedback.correct{color:var(--correct)}.feedback.wrong{color:var(--wrong)}.actions{gap:10px;display:flex}button{cursor:pointer;border:none;border-radius:8px;padding:10px 18px;font-family:inherit;font-size:14px;font-weight:600}button.primary{background:var(--accent);color:#221703}button.primary:disabled{color:#6d7688;cursor:not-allowed;background:#3a3f4b}button.ghost-btn{color:var(--muted);background:0 0;border:1px solid #333b4a}.fretboard-wrap{background:var(--panel);border-radius:12px;padding:12px;overflow-x:auto}.fretboard{min-width:1180px;display:block}.board{fill:var(--board);stroke:var(--board-edge);stroke-width:2px}.dot{fill:#d9c6a5;opacity:.55}.fret-wire{stroke:#b9bfc8;stroke-width:2px}.nut{fill:#e9e3d6}.string{stroke:#d8dde6;opacity:.9}.string-label,.fret-number{fill:var(--muted);font-size:12px}.fret-number.marked{fill:var(--accent);font-weight:700}.hit{fill:#0000;cursor:pointer}.hit:hover{fill:#ffffff24}.hit.inside-block{stroke:none}.block-outline{fill:none;stroke:var(--accent);stroke-width:2px;pointer-events:none}.scale-position-layer{pointer-events:none}.scale-position{fill:none;stroke:var(--accent);stroke-width:1.5px}.scale-anchor{fill:#4b9aff;stroke:#fff;stroke-width:1px}.scale-anchor-label{fill:#fff;font-size:12px;font-weight:700}.hit.inside-block:hover{fill:#ffb45440}.hit.outside-block{fill:#12151cb3;cursor:not-allowed}.fretboard-wrap.locked .hit{cursor:default}.fretboard-wrap.locked .hit:hover{fill:#0000}.marker{stroke-width:2px}.marker-correct{fill:var(--correct);stroke:#fff}.marker-answer{fill:var(--correct);stroke:#ffffffb3;opacity:.85}.marker-root{fill:#5b8dff;stroke:#fff}.marker-pending{fill:var(--accent);stroke:#fff}.marker-wrong{fill:var(--wrong);stroke:#fff}.note-name{fill:#12151c;pointer-events:none;font-size:12px;font-weight:700}.note-name.small{font-size:10px}.note-name.ghost{fill:#ffffffb8;font-weight:500}.score-panel{flex-wrap:wrap;gap:10px;display:flex}.score-item{background:var(--panel);border-radius:10px;flex-direction:column;gap:2px;min-width:92px;padding:10px 18px;display:flex}.score-label{color:var(--muted);font-size:11px}.score-item span:last-child{font-size:20px;font-weight:700}.hint{color:var(--muted);font-size:12px}