:root{--bg:#14161a;--surface:#1d2026;--surface-2:#262a31;--border:#343941;--text:#e8e6e3;--muted:#9aa0a8;--accent:#f2a541;--accent-ink:#1b1305;--tone:#5b8def;--good:#3fbf7f;--bad:#e5534b;--wood:#2a221b;--fret:#8d8f94;--string:#c9c4bb;--window:#f2a54117;--target:#8b5cf6;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;-webkit-text-size-adjust:100%;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:light){:root{--bg:#f6f4f0;--surface:#fff;--surface-2:#eeebe5;--border:#d9d4cb;--text:#1d1f23;--muted:#666b73;--accent:#d9861c;--accent-ink:#fff;--tone:#3c6fd8;--good:#22945b;--bad:#c93c35;--wood:#efe2cf;--fret:#a7a29a;--string:#6d655b;--window:#d9861c1f;--target:#7c3aed;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--text);margin:0}body{min-height:100dvh}button,select,input{font:inherit;color:inherit}h1,h2{margin:0}h2{font-size:1.05rem}button{background:var(--surface-2);border:1px solid var(--border);cursor:pointer;touch-action:manipulation;border-radius:10px;padding:.55em .9em}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);color:var(--accent-ink);border-color:#0000;font-weight:600}button.primary.live{background:var(--bad);color:#fff}select{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;width:100%;min-width:0;padding:.5em .6em}input[type=range]{width:100%;accent-color:var(--accent)}.app{max-width:1100px;margin:0 auto}header{z-index:10;padding:calc(8px + env(safe-area-inset-top)) 16px 8px;background:var(--bg);border-bottom:1px solid var(--border);align-items:center;gap:12px;display:flex;position:sticky;top:0}.brand{letter-spacing:.01em;font-weight:700}.tabs{gap:4px;margin-left:auto;display:flex}.tabs button{color:var(--muted);background:0 0;border:none;padding:.5em .8em}.tabs button.on{color:var(--accent);background:var(--surface-2)}.tabs .icon{display:none}@media (width<=640px){.tabs button{min-width:0;padding:.3em .2em}}.header-actions{align-items:center;gap:2px;display:flex}.timer-pill{border:1px solid var(--bad);color:var(--bad);font-variant-numeric:tabular-nums;background:0 0;border-radius:999px;padding:.2em .7em;font-size:.85rem}.icon-btn.on{color:var(--accent)}.icon-btn{color:var(--muted);background:0 0;border:none;padding:.3em .5em;font-size:1.25rem}main{padding:16px 16px 24px}footer{text-align:center;color:var(--muted);padding:0 16px 24px;font-size:.75rem}footer a{color:var(--accent)}.about{max-width:820px;margin:0 auto;line-height:1.5}.about h1{font-size:1.6rem}.about h3{margin:0;font-size:1.05rem}.about p{margin:0}.about ul{flex-direction:column;gap:4px;margin:0;padding-left:1.2em;display:flex}.about .lead{color:var(--muted);font-size:1.05rem}.about-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px;display:grid}.about-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:8px;padding:14px 16px;display:flex}.about-card ul{color:var(--muted);font-size:.92rem}.about-card button{padding:.35em .75em;font-size:.85rem}@media (width<=640px){header{justify-content:space-between}.tabs{padding:6px 8px calc(6px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--border);justify-content:space-around;margin:0;position:fixed;bottom:0;left:0;right:0}.tabs button{flex-direction:column;flex:1;align-items:center;padding:.3em .8em;font-size:.75rem;display:flex}.tabs button.on{background:0 0}.tabs .icon{font-size:1.3rem;line-height:1.3;display:block}footer{padding-bottom:calc(90px + env(safe-area-inset-bottom))}}.page{flex-direction:column;gap:16px;display:flex}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.row.spread{justify-content:space-between}.row.wrap{justify-content:space-between;align-items:end}.controls{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;display:grid}.field{color:var(--muted);flex-direction:column;gap:6px;font-size:.85rem;display:flex}.field>:not(span){color:var(--text)}.hint{color:var(--muted);margin:0;font-size:.85rem}.error{color:var(--bad);margin:6px 0 0}section{flex-direction:column;gap:10px;display:flex}.segmented{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;flex-wrap:wrap;gap:2px;padding:3px;display:inline-flex}.segmented button{color:var(--muted);background:0 0;border:none;border-radius:7px;padding:.4em .8em}.segmented button.on{background:var(--surface);color:var(--text);box-shadow:0 1px 2px #00000040}.page>.segmented{align-self:flex-start}.segmented.wide{flex-wrap:nowrap;width:100%;display:flex}.page>.segmented.wide{align-self:stretch}.segmented.wide button{white-space:nowrap;flex:1;padding-left:.3em;padding-right:.3em}.stack{flex-direction:column;gap:10px;display:flex}.mic button{width:100%;padding:.8em}.tones{flex-wrap:wrap;gap:6px;display:flex}.tone{background:var(--surface);border:1px solid var(--border);border-radius:10px;flex-direction:column;align-items:center;min-width:44px;padding:4px 8px;display:flex}.tone b{font-size:1.05rem}.tone small{color:var(--muted)}.tone.root{border-color:var(--accent)}.tone.root b{color:var(--accent)}.tone.got{border-color:var(--good)}.tone.got b{color:var(--good)}.chord-prompt{font-size:1.6em}.voicing-reveal{flex-direction:column;align-items:center;gap:6px;display:flex}.voicing-reveal .chord-diagram{width:140px}.chip{flex-direction:column;align-items:center;gap:2px;min-width:64px;display:flex}.chip small{color:var(--muted);font-size:.75rem}.chip.on{border-color:var(--good);color:var(--good)}.diatonic{flex-wrap:wrap;gap:8px;display:flex}.strings{grid-template-columns:repeat(6,1fr);gap:6px;display:grid}.strings .chip{min-width:0;padding:.5em .2em}.fretboard{width:100%}.fretboard svg{width:100%;height:auto;display:block}.fretboard.vertical{max-width:380px;margin:0 auto}.fretboard .board{fill:var(--wood)}.fretboard .window{fill:var(--window)}.fretboard .behind-capo{fill:var(--bg);opacity:.6}.fretboard .capo{fill:var(--muted);opacity:.55}.fretboard .fret{stroke:var(--fret);stroke-width:2px}.fretboard .nut{stroke:var(--string);stroke-width:6px}.fretboard .string{stroke:var(--string);opacity:.8}.fretboard .string.hl{stroke:var(--accent);opacity:1}.fretboard .inlay{fill:var(--fret);opacity:.45}.fret-num{fill:var(--muted);text-anchor:middle;font-size:11px}.marker circle{fill:var(--tone)}.marker text{fill:#fff;text-anchor:middle;pointer-events:none;font-weight:600}.marker.root circle{fill:var(--accent)}.marker.root text{fill:var(--accent-ink)}.marker.ghost circle{fill:var(--surface-2);stroke:var(--border)}.marker.ghost text{fill:var(--muted);font-weight:400}.marker.hit circle{fill:var(--good)}.marker.wrong circle{fill:var(--bad)}.marker.target circle{fill:var(--target)}.marker.target .ring{fill:none;stroke:var(--target);stroke-width:2.5px;transform-box:fill-box;transform-origin:50%;animation:1.1s ease-out infinite ring}@keyframes ring{0%{opacity:1;transform:scale(.8)}to{opacity:0;transform:scale(1.35)}}@media (prefers-reduced-motion:reduce){.marker.target .ring{opacity:.8;animation:none}}.chord-name{font-size:2rem}.voicings{grid-template-columns:repeat(auto-fill,minmax(118px,1fr));gap:10px;display:grid}.voicing{background:var(--surface);flex-direction:column;align-items:center;gap:4px;padding:8px 6px;display:flex}.voicing.on{border-color:var(--accent)}.voicing .tab{color:var(--muted);white-space:nowrap;letter-spacing:-.03em;font-family:ui-monospace,monospace;font-size:.75rem}.chord-diagram{width:100%;max-width:130px}.chord-diagram .fret{stroke:var(--fret);stroke-width:1.2px}.chord-diagram .nut{stroke:var(--text);stroke-width:4px}.chord-diagram .string{stroke:var(--string);stroke-width:1.2px}.chord-diagram .barre{fill:var(--tone);opacity:.45}.chord-diagram .open-mark{fill:var(--muted);text-anchor:middle;font-size:12px}.chord-diagram .open-ring{fill:none;stroke:var(--muted);stroke-width:1.5px}.chord-diagram .open-ring.root{stroke:var(--accent)}.tuner-display{background:var(--surface);border:1px solid var(--border);border-radius:16px;flex-direction:column;align-items:center;gap:8px;padding:24px 16px;display:flex}.tuner-display .note{font-size:4.5rem;font-weight:700;line-height:1}.tuner-display.idle .note{color:var(--muted)}.tuner-display.in-tune .note{color:var(--good)}.needle-scale{width:100%;max-width:420px}.needle-scale .tick{stroke:var(--muted);stroke-width:1.5px}.needle-scale .tick-label{fill:var(--muted);text-anchor:middle;font-size:8px}.needle-scale .zone{fill:var(--good);opacity:.5}.needle-scale .needle{stroke:var(--accent);stroke-width:3px;stroke-linecap:round;transition:all 80ms linear}.tuner-display.in-tune .needle{stroke:var(--good)}.readout{color:var(--muted);font-variant-numeric:tabular-nums}.level{background:var(--surface-2);border-radius:2px;width:160px;height:4px;overflow:hidden}.level div{background:var(--good);height:100%;transition:width 60ms linear}.drill{flex-direction:column;gap:14px;display:flex}.prompt-card{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:16px;flex-direction:column;align-items:center;gap:10px;padding:18px 16px;display:flex}.prompt{font-size:1.3rem}.prompt b{color:var(--accent)}.prompt b.target-text{color:var(--target)}.feedback{color:var(--muted);min-height:1.4em}.feedback.good{color:var(--good);font-weight:600}.feedback.bad,.hint.missed{color:var(--bad)}.timing-readout{flex-direction:column;align-items:center;gap:2px;display:flex}.timing-readout .last{font-variant-numeric:tabular-nums;color:var(--muted);font-weight:700}.timing-readout .last.good{color:var(--good)}.timing-readout .last.ok{color:var(--accent)}.timing-readout .last.bad{color:var(--bad)}.row.pace{justify-content:center}.stats{color:var(--muted);flex-wrap:wrap;justify-content:space-around;gap:8px;font-size:.9rem;display:flex}.stats b{color:var(--text)}.progress{background:var(--surface-2);border-radius:3px;width:100%;max-width:360px;height:6px;overflow:hidden}.progress div{background:var(--good);height:100%;transition:width .12s}details.options{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 14px}details.options[open]{flex-direction:column;gap:12px;display:flex}details.options summary{cursor:pointer;color:var(--muted)}.beats{gap:12px;display:flex}.beat{background:var(--surface-2);border:1px solid var(--border);border-radius:50%;width:22px;height:22px}.beat.one{border-color:var(--accent)}.beat.on{background:var(--good)}.beat.one.on{background:var(--accent)}.bpm{align-items:center;gap:18px;display:flex}.run-tempo{flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;display:flex}.tempo{align-items:center;gap:8px;display:flex}.tempo button{padding:.3em .75em}.tempo>span{font-variant-numeric:tabular-nums;text-align:center;min-width:4.5em}.beats.small{gap:6px;margin-left:4px}.beats.small .beat{width:12px;height:12px}.bpm div{flex-direction:column;align-items:center;min-width:80px;display:flex}.bpm b{font-variant-numeric:tabular-nums;font-size:2.6rem;line-height:1}.bpm small{color:var(--muted)}.prompt-card.timing input[type=range]{max-width:360px}.timing-result{flex-direction:column;align-items:center;gap:6px;display:flex}.timing-result .last{font-variant-numeric:tabular-nums;color:var(--muted);font-size:1.8rem;font-weight:700}.timing-result .last.good{color:var(--good)}.timing-result .last.ok{color:var(--accent)}.timing-result .last.bad{color:var(--bad)}.strip{background:var(--surface);border:1px solid var(--border);border-radius:12px;width:100%;height:120px}.strip .band{fill:var(--good);opacity:.1}.strip .centre{stroke:var(--muted);stroke-dasharray:4 4;vector-effect:non-scaling-stroke}.strip .dot{fill:var(--bad)}.strip .dot.good{fill:var(--good)}.strip-labels{width:100%;color:var(--muted);justify-content:space-between;margin-top:-2px;font-size:.75rem;display:flex}.strip-labels span:first-child:before{content:"↑ "}.strip-labels span:last-child:after{content:" ↓"}.verdict{text-align:center;margin:4px 0 0}:root{--viz-1:#184f95;--viz-2:#2a78d6;--viz-3:#5598e7;--viz-4:#9ec5f4;--viz-line:#5598e7}@media (prefers-color-scheme:light){:root{--viz-1:#86b6ef;--viz-2:#3987e5;--viz-3:#1c5cab;--viz-4:#0d366b;--viz-line:#2a78d6}}input:not([type=range]),textarea{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;width:100%;min-width:0;padding:.5em .6em}textarea{resize:vertical;font:inherit}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:10px;padding:14px 16px;display:flex}.card h2{font-size:1rem}.sync-badge{color:var(--muted);font-size:.8rem}.sync-badge.fortress{color:var(--good)}.banner{border:1px solid var(--accent);border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:10px 14px;display:flex}.tiles{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;display:grid}.tile{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:4px;padding:12px 14px;display:flex}.tile span{color:var(--muted);font-size:.82rem}.tile b{font-variant-numeric:tabular-nums;font-size:1.6rem;line-height:1.1}.tile small{color:var(--muted);font-size:.9rem;font-weight:400}@media (width<=640px){.tile b{font-size:1.3rem}}.chart-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:12px;display:grid}.chart{position:relative}.chart>svg{width:100%;height:auto;display:block;overflow:visible}.chart.heatmap>svg{max-width:560px}.chart>svg:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:4px}.axis-label{fill:var(--muted);font-size:9px}.chart .grid{stroke:var(--border);stroke-width:1px}.chart .zero{stroke:var(--muted);stroke-width:1px}.chart .crosshair{stroke:var(--muted);stroke-width:1px;stroke-dasharray:3 3}.chart .series{fill:none;stroke:var(--viz-line);stroke-width:2px;stroke-linejoin:round;stroke-linecap:round}.chart .series-dot{fill:var(--viz-line);stroke:var(--surface);stroke-width:2px}.chart .series-dot.active{stroke-width:2.5px}.heat{fill:var(--surface-2);stroke:var(--surface);stroke-width:0}.heat.l1{fill:var(--viz-1)}.heat.l2{fill:var(--viz-2)}.heat.l3{fill:var(--viz-3)}.heat.l4{fill:var(--viz-4)}.heat.hover{stroke:var(--text);stroke-width:1.5px}.heat-legend{color:var(--muted);justify-content:flex-end;align-items:center;gap:4px;margin-top:6px;font-size:.75rem;display:flex}.tooltip{pointer-events:none;z-index:5;white-space:nowrap;background:var(--text);color:var(--bg);border-radius:8px;flex-direction:column;gap:1px;padding:5px 9px;font-size:.78rem;display:flex;position:absolute;transform:translate(-50%,calc(-100% - 10px))}.tooltip b{font-size:.95rem}.table{border-collapse:collapse;width:100%;font-size:.88rem}.table th{text-align:left;color:var(--muted);font-weight:500}.table th,.table td{border-bottom:1px solid var(--border);vertical-align:top;padding:6px 8px 6px 0}button.link{color:var(--accent);background:0 0;border:none;padding:.2em .3em;font-size:.85rem}button.link.danger{color:var(--bad)}.timer-card{text-align:center;align-items:center}.timer-card .clock{font-variant-numeric:tabular-nums;font-size:3rem;font-weight:700}.day-group{gap:8px}.day-group h3{margin:6px 0 0;font-size:.95rem}.day-group h3 small{color:var(--muted);font-weight:400}.session{background:var(--surface);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:6px;padding:10px 14px;display:flex}.session b small{color:var(--muted);font-weight:400}.session .notes{color:var(--muted);white-space:pre-wrap;margin:0}.tags{flex-wrap:wrap;gap:6px;display:flex}.tag{background:var(--surface-2);border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:.15em .6em;font-size:.75rem;font-weight:400}button.tag.toggle{padding:.35em .8em;font-size:.85rem}button.tag.toggle.on{border-color:var(--accent);color:var(--accent)}.form{gap:12px}.bpm-progress{align-items:center;gap:10px;display:flex}.bpm-progress>div{flex-direction:column;flex:1;gap:4px;font-size:.9rem;display:flex}.bpm-progress .progress{max-width:none}.bpm-progress button{padding:.3em .6em}.tutor-layout{grid-template-columns:240px 1fr;align-items:start;gap:16px;display:grid}.chats-toggle{display:none}.chat-list{flex-direction:column;gap:6px;max-height:calc(100dvh - 100px);display:flex;position:sticky;top:72px;overflow:auto}.chat-item{border-radius:10px;align-items:center;gap:2px;display:flex}.chat-item.on{background:var(--surface-2)}.chat-title{text-align:left;text-overflow:ellipsis;white-space:nowrap;background:0 0;border:none;flex-direction:column;flex:1;gap:2px;min-width:0;padding:.5em .6em;display:block;overflow:hidden}.chat-title small{color:var(--muted);font-size:.75rem;display:block}.chat{flex-direction:column;gap:12px;min-width:0;display:flex}.chat-empty{flex-direction:column;gap:10px;padding:8px 0;display:flex}.starters{flex-wrap:wrap;gap:8px;display:flex}.starters button{text-align:left}.bubble{overflow-wrap:anywhere;border-radius:14px;max-width:100%;padding:10px 14px}.bubble.user{background:var(--accent);color:var(--accent-ink);white-space:pre-wrap;align-self:flex-end;max-width:85%}.bubble.assistant{background:var(--surface);border:1px solid var(--border)}.typing{color:var(--muted)}.composer{background:var(--bg);align-items:flex-end;gap:8px;padding:8px 0;display:flex;position:sticky;bottom:0}.composer textarea{resize:none;flex:1}.md{flex-direction:column;gap:8px;line-height:1.5;display:flex}.md p,.md ul,.md ol{margin:0}.md ul,.md ol{flex-direction:column;gap:3px;padding-left:1.3em;display:flex}.md h3,.md h4{margin:4px 0 0;font-size:1rem}.md code{background:var(--surface-2);border-radius:4px;padding:.05em .3em;font-family:ui-monospace,monospace;font-size:.9em}.md pre{background:var(--surface-2);border-radius:10px;margin:0;padding:10px 12px;font-family:ui-monospace,monospace;font-size:.85rem;line-height:1.35;overflow-x:auto}.md-table{overflow-x:auto}.md table{border-collapse:collapse;font-size:.9rem}.md th,.md td{border-bottom:1px solid var(--border);text-align:left;vertical-align:top;padding:4px 10px 4px 0}@media (width<=760px){.tutor-layout{grid-template-columns:1fr}.chats-toggle{display:inline-block}.chat-list{max-height:none;display:none;position:static}.chat-list.open{display:flex}.composer{bottom:calc(62px + env(safe-area-inset-bottom))}}.sheet-backdrop{z-index:20;background:#00000080;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.sheet{background:var(--surface);width:100%;max-width:480px;max-height:90dvh;padding:18px 18px calc(18px + env(safe-area-inset-bottom));border-radius:18px 18px 0 0;flex-direction:column;gap:14px;display:flex;overflow:auto}@media (width>=641px){.sheet-backdrop{align-items:center}.sheet{border-radius:18px}}
