:root{--text: #6b6375;--text-h: #08060d;--bg: #fff;--border: #e5e4e7;--code-bg: #f4f3ec;--accent: #aa3bff;--accent-bg: rgba(170, 59, 255, .1);--accent-border: rgba(170, 59, 255, .5);--social-bg: rgba(244, 243, 236, .5);--shadow: rgba(0, 0, 0, .1) 0 10px 15px -3px, rgba(0, 0, 0, .05) 0 4px 6px -2px;--sans: system-ui, "Segoe UI", Roboto, sans-serif;--heading: system-ui, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(max-width:1024px){:root{font-size:16px}}@media(prefers-color-scheme:dark){:root{--text: #9ca3af;--text-h: #f3f4f6;--bg: #16171d;--border: #2e303a;--code-bg: #1f2028;--accent: #c084fc;--accent-bg: rgba(192, 132, 252, .15);--accent-border: rgba(192, 132, 252, .5);--social-bg: rgba(47, 48, 58, .5);--shadow: rgba(0, 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.05);--border-color: rgba(255, 255, 255, .1);--success-color: #4caf50;--danger-color: #f44336;--warning-color: #ff9800}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,var(--bg-gradient-start),var(--bg-gradient-end));color:var(--text-light);min-height:100vh;line-height:1.6}.app{max-width:1500px;padding:20px;min-height:100vh;display:flex;flex-direction:column}.header{text-align:center;margin-bottom:40px;padding:20px;background:var(--card-bg);border-radius:15px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color)}.header h1{font-size:3rem;font-weight:700;background:linear-gradient(45deg,var(--accent-color),var(--accent-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:10px;text-shadow:0 0 30px 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var(--border-color);position:relative;overflow:hidden}.chord-display:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-color),var(--accent-light),var(--accent-color));animation:shimmer 3s ease-in-out infinite}@keyframes shimmer{0%,to{transform:translate(-100%)}50%{transform:translate(100%)}}.current-chord{font-size:4rem;font-weight:700;color:var(--text-light);text-shadow:0 0 20px rgba(255,255,255,.3);margin-bottom:6px;line-height:1.1;min-height:80px;display:flex;align-items:center;justify-content:center}.countdown{font-size:1.5rem;color:var(--accent-light);font-weight:500;animation:countdown-pulse 1s ease-in-out infinite}@keyframes countdown-pulse{0%,to{opacity:.7}50%{opacity:1}}.auto-key-indicator{font-size:.78rem;color:var(--text-muted);font-style:italic;margin-top:8px;opacity:.6}.controls{background:var(--card-bg);border-radius:15px;padding:30px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px 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scale(.96);filter:blur(8px)}60%{opacity:1;filter:blur(0)}to{transform:translateY(0) scale(1)}}.focus-countdown{height:32px;margin-top:24px;font-size:1.1rem;font-weight:500;color:var(--accent-light);letter-spacing:.06em;font-variant-numeric:tabular-nums;opacity:0;transform:translateY(-4px);transition:opacity .3s ease,transform .3s ease}.focus-countdown.visible{opacity:1;transform:translateY(0);animation:focus-pulse 1.6s ease-in-out infinite}@keyframes focus-pulse{0%,to{opacity:.7}50%{opacity:1}}.focus-actions{position:relative;display:flex;gap:12px;margin-bottom:14px;z-index:2}.focus-btn{padding:14px 28px;border-radius:14px;font-size:1rem;font-weight:600;font-family:inherit;cursor:pointer;letter-spacing:.02em;transition:transform .15s ease,box-shadow .25s ease,background .2s ease,border-color .2s ease;min-width:140px}.focus-btn.ghost{background:#ffffff0a;border:1px solid var(--border-color);color:var(--text-light)}.focus-btn.ghost:hover:not(:disabled){border-color:var(--accent-color);background:#e945600f}.focus-btn.ghost:disabled{opacity:.4;cursor:not-allowed}.focus-btn.primary{background:linear-gradient(135deg,var(--accent-color),var(--accent-light));border:none;color:#fff;box-shadow:0 4px 18px #e9456059}.focus-btn.primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px #e945608c}.focus-btn.primary.stop{background:linear-gradient(135deg,#ff5252,#ff7575);box-shadow:0 4px 18px #ff525259}.focus-hint{position:relative;margin:0;font-size:.78rem;color:var(--text-muted);letter-spacing:.04em;z-index:2}.focus-hint kbd{display:inline-block;padding:2px 8px;margin:0 2px;background:#ffffff0d;border:1px solid var(--border-color);border-radius:6px;font-family:inherit;font-size:.72rem;color:var(--text-light)}@media(orientation:landscape)and (max-height:600px){.focus-stats{padding-top:0;gap:24px}.focus-chord{font-size:clamp(4rem,18vh,12rem)}.focus-mode{padding:20px 24px}}@media(max-width:600px){.focus-stats{gap:24px}.focus-actions{flex-direction:column;width:100%;max-width:280px}.focus-btn{width:100%}.focus-exit{top:16px;right:16px;width:38px;height:38px}}.main-nav{display:flex;align-items:center;gap:24px;padding:16px 24px;background:#ffffff05;border-bottom:1px solid var(--border-color);margin:-20px -20px 0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.main-nav-brand{display:flex;align-items:center;gap:10px}.main-nav-logo{font-size:1.5rem;color:var(--accent-light)}.main-nav-title{font-size:1.25rem;font-weight:700;color:var(--text-light);letter-spacing:-.02em}.main-nav-sections{display:flex;align-items:center;gap:4px;margin-left:32px}.main-nav-section{padding:10px 20px;text-decoration:none;color:var(--text-muted);font-size:.95rem;font-weight:500;letter-spacing:.02em;border-radius:8px;transition:all .2s 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.staff-display{width:100%;display:flex;flex-direction:column;align-items:center}.staff-canvas{width:100%;max-width:520px;margin:0 auto;padding:16px 8px 8px;background:#fffffff5;border-radius:12px;box-shadow:0 4px 24px #00000059,inset 0 0 0 1px #ffffff80;animation:staff-fade-in .35s ease-out}@keyframes staff-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.staff-note-label{margin-top:14px;font-size:1.2rem;font-weight:600;color:var(--accent-light);letter-spacing:.08em;font-variant-numeric:tabular-nums;animation:staff-fade-in .35s ease-out}.note-options,.note-ranges{margin-top:14px}.note-options h3,.note-ranges h3{font-size:.85rem;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);margin:0 0 .85rem;font-weight:600}.note-toggle{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;background:#ffffff06;border:1px solid var(--border-color);border-radius:10px;cursor:pointer;font-size:.9rem;color:var(--text-light);transition:border-color .2s ease,background .2s ease}.note-toggle:hover{border-color:var(--accent-color);background:#e945600d}.note-toggle input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent-color);cursor:pointer}.note-toggle:has(input:checked){background:#e945601f;border-color:var(--accent-color);box-shadow:0 0 0 1px #e9456040}.note-range-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px}.note-range-card{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:12px 14px;background:#ffffff06;border:1px solid var(--border-color);border-radius:12px;color:var(--text-light);cursor:pointer;font-family:inherit;text-align:left;transition:border-color .2s ease,background .2s ease,transform .15s ease}.note-range-card:hover{border-color:var(--accent-color);background:#e945600d;transform:translateY(-1px)}.note-range-card.active{border-color:var(--accent-color);background:linear-gradient(135deg,#e9456029,#ff6b6b0f);box-shadow:0 0 0 1px #e945604d,0 4px 14px #e945601f}.note-range-label{font-size:.95rem;font-weight:600;letter-spacing:.01em}.note-range-card.active .note-range-label{color:var(--accent-light)}.note-range-desc{font-size:.74rem;color:var(--text-muted);letter-spacing:.02em}.staff-section{padding:22px 24px 18px}.route-fallback{display:flex;align-items:center;justify-content:center;min-height:60vh}.route-fallback-spinner{width:32px;height:32px;border:2px solid rgba(255,255,255,.1);border-top-color:var(--accent-color);border-radius:50%;animation:route-fallback-spin .8s linear infinite}@keyframes route-fallback-spin{to{transform:rotate(360deg)}}.focus-staff-area{width:100%}.focus-staff-frame{width:min(900px,90vw);margin:0 auto;padding:32px 28px;background:#fffffff5;border-radius:18px;box-shadow:0 24px 80px #00000073,0 0 0 1px #ffffff80 inset;animation:focus-chord-enter .4s cubic-bezier(.2,.9,.3,1)}.focus-staff-frame .staff-display{align-items:center}.focus-staff-frame .staff-canvas{background:transparent;box-shadow:none;padding:8px;max-width:100%}.focus-staff-frame .staff-note-label{margin-top:18px;font-size:1.6rem;color:var(--accent-color)}@media(max-width:600px){.focus-staff-frame{padding:18px 12px;width:96vw}}.playback-controls{margin-bottom:16px;padding:14px 16px;background:#ffffff06;border:1px solid var(--border-color);border-radius:12px;display:flex;flex-direction:column;gap:10px}.playback-row{display:flex;align-items:center;gap:10px}.playback-toggle{flex:1;display:inline-flex;align-items:center;gap:10px;padding:8px 14px;background:#ffffff08;border:1px solid var(--border-color);border-radius:10px;color:var(--text-light);font-size:.88rem;font-weight:500;cursor:pointer;font-family:inherit;transition:border-color .2s ease,background .2s ease,color .2s ease}.playback-toggle.off{color:var(--text-muted)}.playback-toggle:hover{border-color:var(--accent-color);background:#e945600d}.playback-toggle.on{border-color:var(--accent-color);background:#e945601a;color:var(--accent-light);box-shadow:0 0 0 1px #e9456033}.playback-toggle-icon{font-size:1rem;font-weight:600;line-height:1;width:18px;text-align:center}.playback-toggle.on .playback-toggle-icon{color:var(--accent-light);text-shadow:0 0 12px rgba(233,69,96,.55)}.playback-play-btn{width:38px;height:38px;border-radius:50%;background:#ffffff0a;border:1px solid var(--border-color);color:var(--text-light);font-size:1rem;cursor:pointer;font-family:inherit;display:inline-flex;align-items:center;justify-content:center;padding-left:2px;transition:border-color .2s ease,background .2s ease,transform .15s 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28px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;flex-direction:column;gap:22px;transition:border-color .4s ease,box-shadow .5s ease,background .4s ease;position:relative;overflow:hidden}.ear-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-color),var(--accent-light),var(--accent-color));opacity:.55}.ear-card-correct{border-color:#4caf5073;box-shadow:0 0 0 1px #4caf502e,0 0 32px #4caf501f;background:linear-gradient(180deg,rgba(76,175,80,.05),var(--card-bg) 70%)}.ear-card-wrong{border-color:var(--border-color);box-shadow:none}.ear-card-revealed{border-color:#4caf504d;box-shadow:0 0 0 1px #4caf501f}.ear-mode-switcher{display:inline-flex;align-self:flex-start;gap:4px;padding:4px;border-radius:999px;background:#ffffff0a;border:1px solid var(--border-color)}.ear-mode-tab{border:none;background:transparent;color:var(--text-muted);padding:8px 18px;border-radius:999px;font-size:.85rem;font-weight:500;cursor:pointer;letter-spacing:.02em;transition:color .2s ease,background .2s ease;font-family:inherit}.ear-mode-tab:hover{color:var(--text-light)}.ear-mode-tab.active{color:#fff;background:linear-gradient(135deg,var(--accent-color),var(--accent-light));box-shadow:0 2px 10px #e9456040}.ear-prompt{font-size:.85rem;color:var(--text-muted);letter-spacing:.12em;text-transform:uppercase;text-align:center}.ear-play-row{display:flex;justify-content:center;padding:6px 0 4px}.ear-play-btn{width:120px;height:120px;border-radius:50%;border:1px solid rgba(233,69,96,.45);background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.08),transparent 55%),linear-gradient(135deg,#e9456038,#ff6b6b1a);color:var(--text-light);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-family:inherit;transition:transform .2s ease,box-shadow .3s ease,border-color .3s ease;box-shadow:0 4px 24px #e9456026}.ear-play-btn:hover{transform:translateY(-2px) scale(1.02);border-color:var(--accent-light);box-shadow:0 8px 32px #e945604d}.ear-play-btn:active{transform:translateY(0) scale(.98)}.ear-play-icon{font-size:2.2rem;color:var(--accent-light);margin-left:6px;line-height:1}.ear-play-label{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--text-muted)}.ear-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}.ear-option{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:14px 16px;background:#ffffff06;border:1px solid var(--border-color);border-radius:12px;color:var(--text-light);cursor:pointer;font-family:inherit;transition:border-color .2s ease,background .2s ease,transform .15s ease,opacity .3s ease;min-height:64px;text-align:left}.ear-option:hover:not(:disabled){border-color:var(--accent-color);background:#e945600f;transform:translateY(-1px)}.ear-option-label{font-size:.98rem;font-weight:600;letter-spacing:.01em}.ear-option-hint{font-size:.72rem;color:var(--text-muted);letter-spacing:.02em}.ear-option.is-correct{border-color:#4caf50b3;background:#4caf501f;box-shadow:0 0 0 1px #4caf504d,0 0 24px #4caf502e;animation:earCorrectPulse .7s ease}.ear-option.is-correct .ear-option-label{color:#a5d6a7}.ear-option.is-wrong{border-color:#ff98008c;background:#ff98000f;animation:earShake .35s ease}.ear-option.is-wrong .ear-option-label{color:#ffcc80}.ear-option.is-reveal{border-color:#4caf5073;background:#4caf500f}.ear-option.is-reveal .ear-option-label{color:#a5d6a7}.ear-option.is-dim{opacity:.45}.ear-option.is-eliminated{opacity:.28;text-decoration:line-through;text-decoration-color:#ffffff40;filter:grayscale(.4);cursor:not-allowed}.ear-option.is-eliminated:hover{border-color:var(--border-color);background:#ffffff06;transform:none}.ear-option:disabled{cursor:default}@keyframes earCorrectPulse{0%{box-shadow:0 0 #4caf5080}60%{box-shadow:0 0 0 14px #4caf5000}to{box-shadow:0 0 0 1px #4caf504d,0 0 24px #4caf502e}}@keyframes earShake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}50%{transform:translate(4px)}75%{transform:translate(-2px)}}.ear-feedback{min-height:22px;text-align:center;font-size:.92rem;letter-spacing:.01em;transition:color .3s ease,opacity .3s ease}.ear-feedback.correct .ear-feedback-text{color:#a5d6a7}.ear-feedback.wrong .ear-feedback-text{color:#ffcc80}.ear-feedback.revealed .ear-feedback-text{color:#a5d6a7}.ear-feedback .muted{color:var(--text-muted);font-style:italic}.ear-feedback-mark{display:inline-block;margin-right:8px;font-size:1.05rem;color:#66bb6a}.ear-actions{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:4px}.ear-actions .btn{min-width:140px}.ear-secondary-btn{padding:10px 18px;border:1px solid var(--border-color);background:#ffffff08;color:var(--text-light);border-radius:12px;font-size:.88rem;font-weight:500;cursor:pointer;font-family:inherit;transition:border-color .2s ease,background .2s ease}.ear-secondary-btn:hover:not(:disabled){border-color:var(--accent-color);background:#e945600f}.ear-secondary-btn:disabled{opacity:.4;cursor:not-allowed}.ear-hint-btn{border-color:#ff980059;color:#ffcc80}.ear-hint-btn:hover:not(:disabled){border-color:#ffb74d;background:#ff980012;color:#ffd699}.ear-text-btn{background:none;border:none;color:var(--text-muted);font-size:.84rem;font-family:inherit;font-weight:500;letter-spacing:.02em;cursor:pointer;padding:6px 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#e9456040}.live-surface{display:flex;flex-direction:column;align-items:center;gap:20px;min-height:240px;justify-content:center}.live-start{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}.live-start-hint{color:var(--text-muted);font-size:.9rem;max-width:320px;line-height:1.5}.live-error{color:#ffb3b3;font-size:.85rem}.live-banner{padding:12px 16px;border-radius:12px;font-size:.85rem;text-align:center}.live-banner-warn{background:#ff980014;border:1px solid rgba(255,152,0,.35);color:#ffcc80}.live-note{display:flex;flex-direction:column;align-items:center;gap:6px;min-height:120px;justify-content:center}.live-note-name{font-size:5rem;font-weight:700;color:var(--text-light);line-height:1;letter-spacing:-.02em;transition:color .2s ease,opacity .15s ease}.live-note:not(.live-note-active) .live-note-name{color:var(--text-muted);opacity:.5}.live-note-active 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ease}.tuner-instrument-btn:hover:not(:disabled){border-color:#8bc34a66}.tuner-instrument-btn.active{border-color:#8bc34a99;background:#8bc34a1a}.tuner-instrument-btn:disabled{opacity:.5;cursor:not-allowed}.tuner-instrument-icon{font-size:1.5rem}.tuner-instrument-name{font-size:.85rem;font-weight:600;color:var(--text-light)}.tuner-tuning-list{display:flex;flex-direction:column;gap:6px;max-height:280px;overflow-y:auto}.tuner-tuning-btn{display:flex;flex-direction:column;gap:2px;padding:10px 12px;background:#ffffff05;border:1px solid var(--border-color);border-radius:8px;cursor:pointer;font-family:inherit;text-align:left;transition:all .15s ease}.tuner-tuning-btn:hover:not(:disabled){border-color:#8bc34a66}.tuner-tuning-btn.active{border-color:#8bc34a99;background:#8bc34a1a}.tuner-tuning-btn:disabled{opacity:.5;cursor:not-allowed}.tuner-tuning-name{font-size:.9rem;font-weight:600;color:var(--text-light)}.tuner-tuning-desc{font-size:.75rem;color:var(--text-muted);font-family:monospace}.tuner-reference{display:flex;flex-direction:column;gap:8px}.tuner-reference-label{font-size:1rem;font-weight:600;color:var(--text-light);text-align:center}.tuner-reference-slider{width:100%;height:6px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:#ffffff1a;border-radius:3px;outline:none;cursor:pointer}.tuner-reference-slider::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;background:#8bc34a;border-radius:50%;cursor:pointer;transition:transform .15s ease}.tuner-reference-slider::-webkit-slider-thumb:hover{transform:scale(1.15)}.tuner-reference-slider:disabled{opacity:.5;cursor:not-allowed}.tuner-reference-marks{display:flex;justify-content:space-between;font-size:.7rem;color:var(--text-muted)}.tuner-reference-reset{padding:6px 12px;background:transparent;border:1px solid var(--border-color);border-radius:6px;color:var(--text-muted);font-size:.8rem;cursor:pointer;font-family:inherit;transition:all .15s ease;margin-top:4px}.tuner-reference-reset:hover:not(:disabled){color:var(--text-light);border-color:#fff3}.tuner-reference-reset:disabled{opacity:.5;cursor:not-allowed}.tuner-tips ul{margin:0;padding:0 0 0 18px;list-style:disc}.tuner-tips li{font-size:.85rem;color:var(--text-muted);line-height:1.6;margin-bottom:4px}@media(max-width:820px){.tuner-main{padding:24px 18px;min-height:480px}.tuner-detected-note{font-size:4rem}.tuner-meter{padding:20px}.tuner-strings-ref{gap:4px;padding:10px 12px}.tuner-string-ref{padding:6px 8px;min-width:36px}}@media(max-width:480px){.tuner-main{padding:18px 14px;min-height:420px}.tuner-title{font-size:1.3rem}.tuner-detected-note{font-size:3.5rem}.tuner-cents-value{font-size:1.5rem}.tuner-status{font-size:1rem}.tuner-strings-ref{flex-wrap:wrap;justify-content:center}.tuner-string-ref{min-width:32px;padding:5px 6px}.tuner-string-ref-note{font-size:.9rem}}