:root{--ink-ivory: #f6f1e7;--ink-cream: #efe8d8;--ink-paper: #fbf7ed;--ink-black: #1a1612;--ink-muted: #5a524a;--ink-faint: #b5ab9c;--ink-hairline: #2b2620;--ink-burgundy: #6b1f2e;--ink-burgundy-deep: #4a131f;--ink-blue: #1a3a5c;--ink-blue-deep: #0f2640;--ink-gold: #b08740;--font-display: "Cormorant Garamond", "Cormorant", "Baskerville", "Georgia", serif;--font-ui: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-musical: "Bravura Text", "Noto Music", "Cambria Math", serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.25rem;--text-xl: 1.5rem;--text-2xl: 2rem;--text-3xl: 2.75rem;--text-4xl: 4rem;--text-hero: 6rem;--s-1: .25rem;--s-2: .5rem;--s-3: .75rem;--s-4: 1rem;--s-6: 1.5rem;--s-8: 2rem;--s-12: 3rem;--s-16: 4rem;--s-24: 6rem;--ease-confident: cubic-bezier(.22, 1, .36, 1);--dur-slow: .7s;--dur-medium: .4s;--dur-fast: .2s;--hairline: 1px;--radius-sm: 2px;--radius-md: 4px}@media(prefers-color-scheme:dark){:root{--ink-ivory: #141018;--ink-cream: #1f1920;--ink-paper: #0f0b13;--ink-black: #e8e0d2;--ink-muted: #9e9586;--ink-faint: #5a524a;--ink-hairline: #d6cebf;--ink-burgundy: #c27a88;--ink-burgundy-deep: #a45a68;--ink-blue: #7ea2cc;--ink-blue-deep: #5e82ac;--ink-gold: 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auto;width:100%}.app-brand{font-family:var(--font-display);font-weight:600;font-size:var(--text-xl);letter-spacing:-.02em;color:var(--ink-black);background:transparent;border:none;padding:0;cursor:pointer}.app-brand:hover{background:transparent;color:var(--ink-burgundy)}.app-nav{display:flex;align-items:center;gap:var(--s-4)}.locale-toggle{display:inline-flex;align-items:center;gap:var(--s-1);font-family:var(--font-ui);font-size:var(--text-xs);letter-spacing:.18em}.locale-toggle .locale-btn,.locale-toggle .locale-btn:hover,.locale-toggle .locale-btn:focus-visible{background:transparent;border:none;padding:var(--s-1) var(--s-2);font-family:inherit;font-size:inherit;letter-spacing:inherit;text-transform:uppercase;color:var(--ink-faint);cursor:pointer;transition:color var(--dur-fast) var(--ease-confident)}.locale-toggle .locale-btn.active{color:var(--ink-black)}.locale-toggle .locale-btn:hover:not(.active){color:var(--ink-muted)}.locale-toggle .locale-sep{color:var(--ink-faint);-webkit-user-select:none;user-select:none}.btn-ghost{background:transparent;border:var(--hairline) solid transparent;font-family:var(--font-ui);font-size:var(--text-sm);color:var(--ink-muted);padding:var(--s-1) var(--s-3);cursor:pointer;letter-spacing:.03em;transition:color var(--dur-fast) var(--ease-confident),background var(--dur-fast) var(--ease-confident)}.btn-ghost:hover{background:transparent;color:var(--ink-black);border-color:transparent}.btn-primary{font-family:var(--font-ui);font-size:var(--text-base);color:var(--ink-ivory);background:var(--ink-black);border:var(--hairline) solid var(--ink-black);padding:var(--s-3) var(--s-6);cursor:pointer;letter-spacing:.04em;transition:background var(--dur-medium) var(--ease-confident),border-color var(--dur-medium) var(--ease-confident)}.btn-primary:hover:not(:disabled){background:var(--ink-burgundy);border-color:var(--ink-burgundy);color:var(--ink-ivory)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.coming-soon{display:grid;place-items:center;flex:1;padding:var(--s-12) var(--s-4)}.coming-soon-card{max-width:36rem;width:100%;text-align:center;display:flex;flex-direction:column;gap:var(--s-4);align-items:center}.coming-soon-eyebrow{font-family:var(--font-ui);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.28em;color:var(--ink-faint);margin:0}.coming-soon-headline{font-family:var(--font-display);font-size:clamp(var(--text-3xl),6vw,var(--text-hero));font-weight:500;letter-spacing:-.02em;line-height:1;color:var(--ink-black);margin:0}.coming-soon-body{font-family:var(--font-display);font-style:italic;font-size:var(--text-lg);color:var(--ink-muted);max-width:28rem;line-height:1.5;margin:0}.coming-soon .btn-ghost{margin-top:var(--s-4);border:var(--hairline) solid var(--ink-hairline);padding:var(--s-2) var(--s-6)}.auth-page{display:grid;place-items:center;flex:1;padding:var(--s-8) var(--s-4)}.auth-form{max-width:24rem;width:100%;display:flex;flex-direction:column;gap:var(--s-6)}.auth-form h2{font-family:var(--font-display);font-size:var(--text-3xl);font-weight:500;text-align:center}.auth-form form{display:flex;flex-direction:column;gap:var(--s-4)}.field{display:flex;flex-direction:column;gap:var(--s-2)}.field span{font-family:var(--font-ui);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.15em;color:var(--ink-muted)}.field input{font-family:var(--font-ui);font-size:var(--text-base);padding:var(--s-3);border:var(--hairline) solid var(--ink-hairline);background:var(--ink-paper);color:var(--ink-black);transition:border-color var(--dur-fast) var(--ease-confident)}.field input:focus{outline:none;border-color:var(--ink-burgundy)}.field-password{position:relative}.field-password input{width:100%;padding-right:calc(var(--s-8) + 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var(--ease-confident),border-color var(--dur-fast) var(--ease-confident)}.legal-footer .legal-link:hover{color:var(--ink-black);border-bottom-color:var(--ink-hairline)}.legal-footer .legal-sep{color:var(--ink-faint);-webkit-user-select:none;user-select:none;margin:0 var(--s-1)}.legal-page{flex:1;padding:var(--s-8) var(--s-4);max-width:44rem;width:100%;margin:0 auto}.legal-article{font-family:var(--font-display);color:var(--ink-black);line-height:1.65}.legal-title{font-family:var(--font-display);font-size:clamp(var(--text-3xl),5vw,var(--text-hero));font-weight:500;letter-spacing:-.02em;line-height:1.05;margin:0 0 var(--s-2) 0}.legal-updated{font-style:italic;color:var(--ink-muted);font-size:var(--text-sm);margin:0 0 var(--s-6) 0}.legal-article p{font-size:var(--text-base);margin:0 0 var(--s-4) 0}.legal-section-h{font-family:var(--font-display);font-size:var(--text-xl);font-weight:500;letter-spacing:-.01em;margin:var(--s-6) 0 var(--s-3) 0;color:var(--ink-black)}.legal-list{margin:0 0 var(--s-4) var(--s-6);padding:0}.legal-list li{font-size:var(--text-base);margin-bottom:var(--s-1)}.legal-article a{color:var(--ink-blue);text-decoration:underline;text-underline-offset:.2em}.legal-article a:hover{color:var(--ink-burgundy)}.legal-article code{font-family:var(--font-ui);font-size:.9em;padding:.1em .35em;background:color-mix(in srgb,var(--ink-hairline) 20%,transparent);border-radius:2px}.account-page{flex:1;padding:var(--s-8) var(--s-4);max-width:36rem;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:var(--s-6)}.account-title{font-family:var(--font-display);font-size:clamp(var(--text-3xl),5vw,var(--text-hero));font-weight:500;letter-spacing:-.02em;margin:0}.account-identity{font-family:var(--font-display);font-style:italic;color:var(--ink-muted);margin:0}.account-section{display:flex;flex-direction:column;gap:var(--s-3);padding-top:var(--s-6);border-top:var(--hairline) solid color-mix(in srgb,var(--ink-hairline) 30%,transparent)}.account-section 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var(--ink-burgundy);outline-offset:4px;border-radius:2px}.scale-title-part--active{font-style:italic}.scale-staff{display:block;width:148px;flex-shrink:0;height:auto;color:var(--ink-black);overflow:visible}.staff-clef{font-family:var(--font-musical);font-size:55px;fill:currentColor}.staff-accidental{font-family:var(--font-musical);font-size:22px;fill:var(--ink-burgundy)}.scale-title .scale-glyph,.scale-pill-accidental{font-family:var(--font-musical);font-style:normal;line-height:1}.scale-title .scale-glyph{display:inline-block;font-size:.55em;vertical-align:.45em;margin-left:.05em}.scale-pickers{display:flex;flex-direction:column;align-items:center;gap:var(--s-2);margin:var(--s-8) 0 var(--s-6)}.scale-picker{text-align:center}.scale-picker-eyebrow{font-family:var(--font-ui);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.28em;color:var(--ink-faint);margin:0 0 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var(--ink-hairline);border-radius:50%;background:var(--ink-paper);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink-black);transition:background var(--dur-fast) var(--ease-confident),border-color var(--dur-fast) var(--ease-confident),color var(--dur-fast) var(--ease-confident)}.action-pill:hover{background:var(--ink-cream);border-color:var(--ink-burgundy);color:var(--ink-burgundy)}.action-pill.action-pill-active{border-color:var(--ink-burgundy);color:var(--ink-burgundy);background:var(--ink-cream)}.action-pill svg{width:50%;height:50%}.scale-picker--practice-menu{margin-top:var(--s-3)}.scale-picker--title{margin-top:var(--s-2);margin-bottom:var(--s-2)}.scale-bottom-panel{max-width:52ch;margin:var(--s-8) auto 0;padding-top:var(--s-8);border-top:var(--hairline) solid color-mix(in srgb,var(--ink-hairline) 40%,transparent)}.scale-bottom-panel.scale-pedagogy p{font-family:var(--font-display);font-size:var(--text-lg);line-height:1.65;color:var(--ink-black)}.scale-bottom-panel-stub{text-align:center}.scale-bottom-panel-eyebrow{font-family:var(--font-ui);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.28em;color:var(--ink-faint);margin:0 0 var(--s-3) 0}.scale-bottom-panel-coming{font-family:var(--font-display);font-style:italic;font-size:var(--text-lg);color:var(--ink-muted);margin:0}.scale-bottom-panel-picker{text-align:center}.panel-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--s-2) var(--s-3);margin-top:var(--s-4)}.panel-grid-option{font-family:var(--font-display);font-style:italic;font-size:var(--text-lg);font-weight:500;color:var(--ink-muted);background:transparent;border:none;padding:var(--s-1) var(--s-2);cursor:pointer;letter-spacing:.01em;transition:color var(--dur-fast) 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ear-training-pulse-a{0%{transform:scale(1);color:var(--ink-muted);border-color:var(--ink-hairline)}15%{transform:scale(1.12);color:var(--ink-burgundy);border-color:var(--ink-burgundy)}to{transform:scale(1);color:var(--ink-muted);border-color:var(--ink-hairline)}}@keyframes ear-training-pulse-b{0%{transform:scale(1);color:var(--ink-muted);border-color:var(--ink-hairline)}15%{transform:scale(1.12);color:var(--ink-burgundy);border-color:var(--ink-burgundy)}to{transform:scale(1);color:var(--ink-muted);border-color:var(--ink-hairline)}}.ear-training-indicator--pulse-a{animation:ear-training-pulse-a .55s var(--ease-confident)}.ear-training-indicator--pulse-b{animation:ear-training-pulse-b .55s var(--ease-confident)}.ear-training-controls{display:flex;flex-direction:column;gap:var(--s-3);max-width:36ch;margin:0 auto}.ear-training-field{display:grid;grid-template-columns:7ch 1fr 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