:root{--c-color: #ff4444;--cs-color: #ff8844;--d-color: #ffcc44;--ds-color: #ccff44;--e-color: #88ff44;--f-color: #44ff44;--fs-color: #44ff88;--g-color: #44ffcc;--gs-color: #44ccff;--a-color: #4488ff;--as-color: #4444ff;--b-color: #8844ff;--bg-color: #0a0a1a;--bg-dark: #0a0a1a;--bg-medium: #1a1a3a;--bg-light: #2a2a4a;--secondary-bg: #1a1a3a;--card-bg: #2a2a4a;--text-color: #ffffff;--text-primary: #ffffff;--text-secondary: #cccccc;--text-muted: #999999;--accent-color: #ffd700;--accent: #ffd700;--accent-hover: #ffed4a;--border-color: #444466;--border: #444466;--primary-color: #ffd700;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-xxl: 3rem;--transition-fast: .2s ease;--transition-medium: .4s ease;--transition-slow: .6s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-medium) 100%);color:var(--text-primary);min-height:100vh;overflow-x:hidden}#app{display:grid;grid-template-areas:"header" "main";grid-template-columns:1fr;grid-template-rows:auto 1fr;min-height:100vh}header{grid-area:header;background:var(--bg-medium);border-bottom:2px solid var(--border);padding:var(--space-lg);text-align:center}header h1{font-size:2.5rem;background:linear-gradient(45deg,var(--accent),#fff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-sm)}header p{color:var(--text-secondary);margin-bottom:var(--space-lg)}#navigation{display:flex;justify-content:center;align-items:center;gap:var(--space-md)}.nav-btn{background:var(--bg-light);border:2px solid var(--border);color:var(--text-primary);padding:var(--space-sm) var(--space-lg);border-radius:25px;cursor:pointer;transition:all 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var(--transition-fast);user-select:none}.toggle-option.sharp{left:8px;color:var(--text-primary)}.toggle-option.flat{right:8px;color:var(--text-secondary)}.toggle-thumb{position:absolute;top:2px;left:2px;width:30px;height:30px;background:linear-gradient(45deg,var(--accent),#fff);border-radius:50%;transition:all var(--transition-fast);box-shadow:0 2px 6px #0003}.toggle-input:checked+.toggle-track .toggle-thumb{transform:translate(42px)}.toggle-input:checked+.toggle-track .toggle-option.sharp{color:var(--text-secondary)}.toggle-input:checked+.toggle-track .toggle-option.flat{color:var(--text-primary)}main{grid-area:main;padding:var(--space-xl);overflow-y:auto}.view{display:none;animation:fadeIn var(--transition-medium)}.view.active{display:block}.view-header{text-align:center;margin-bottom:var(--space-xxl)}.view-header h2{font-size:2rem;margin-bottom:var(--space-sm);color:var(--accent)}.view-header p{color:var(--text-secondary);font-size:1.1rem}.view-header{max-width:900px;margin-left:auto;margin-right:auto;padding-left:1rem;padding-right:1rem}.view-header p{max-width:68ch;margin-left:auto;margin-right:auto;line-height:1.6}.visualization{display:flex;flex-direction:column;align-items:center;gap:var(--space-xl)}#chromatic-circle{width:100%;height:auto;min-height:0;margin:0 auto;z-index:10}.note-element{position:absolute;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-fast);border:2px solid rgba(255,255,255,.3);font-weight:700;font-size:1.1rem;color:#000;text-shadow:0 0 3px rgba(255,255,255,.8)}.note-element:hover{transform:scale(1.2);box-shadow:0 0 20px #ffffff80}.note-element.selected{transform:scale(1.3);box-shadow:0 0 25px var(--accent);border-color:var(--accent)}#whole-tone-display{display:flex;flex-direction:row;gap:var(--space-xxl);justify-content:center;align-items:flex-start}.whole-tone-group{text-align:center}.whole-tone-group h3{margin-bottom:var(--space-lg);color:var(--accent)}.tone-circle{position:relative;width:250px;height:250px;border:2px solid var(--border);border-radius:50%;margin:0 auto}.diminished-selector{display:flex;gap:var(--space-md);margin-bottom:var(--space-xl)}.dim-btn{background:var(--bg-light);border:2px solid var(--border);color:var(--text-primary);padding:var(--space-md) var(--space-lg);border-radius:8px;cursor:pointer;transition:all var(--transition-fast)}.dim-btn:hover{border-color:var(--accent)}.dim-btn.active{background:var(--accent);color:var(--bg-dark);border-color:var(--accent)}.dim-visualization{position:relative;width:300px;height:300px;margin:0 auto 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.3s ease}.chord-item:hover{background:#ffffff14;border-color:var(--accent-color);transform:translateY(-2px)}.chord-name{font-weight:700;margin-bottom:.5rem;color:var(--text-primary)}.chord-notes{display:flex;flex-wrap:wrap;gap:.25rem;margin-bottom:.5rem}.chord-notes .note-pill{font-size:.7rem;padding:.2rem .4rem}.chord-source{font-size:.7rem;color:var(--text-secondary);font-style:italic}.voice-leading-explanation{background:#ffffff05;padding:1.5rem;border-radius:8px;border:1px solid rgba(255,255,255,.05)}.methods-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1rem}.method-item{padding:1rem;background:#ffffff08;border-radius:8px;border-left:3px solid var(--accent-color)}.method-item strong{color:var(--accent-color);display:block;margin-bottom:.5rem}.method-item p{font-size:.9rem;color:var(--text-secondary);margin:0}@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}.chord-grid,.methods-grid{grid-template-columns:1fr}.complete-system{max-height:60vh}}.overview-controls{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap}.matrix-toggle{background:linear-gradient(135deg,#ff6b6b,#4ecdc4);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;font-size:.9rem;font-weight:700;transition:all .3s ease;box-shadow:0 4px 15px #ff6b6b4d}.matrix-toggle:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ff6b6b66}.chord-generation-matrix{background:linear-gradient(135deg,#ffffff05,#ffffff0d);border-radius:15px;padding:2rem;border:2px solid rgba(255,255,255,.1);backdrop-filter:blur(10px)}.matrix-header{text-align:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:2px solid rgba(255,255,255,.1)}.matrix-header h4{font-size:1.5rem;color:var(--accent-color);margin-bottom:.5rem}.matrix-legend{display:flex;justify-content:center;gap:2rem;margin-top:1rem;flex-wrap:wrap}.legend-item{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:#ffffff0d;border-radius:20px;border:1px solid rgba(255,255,255,.1)}.legend-icon{font-weight:700;color:var(--accent-color);font-size:1.2rem}.matrix-pair-section{margin-bottom:3rem;background:#ffffff05;border-radius:12px;padding:1.5rem;border:1px solid rgba(255,255,255,.08);transition:all .3s ease}.matrix-pair-section:hover{border-color:var(--accent-color);box-shadow:0 4px 20px #ffd7001a}.pair-header h5{color:var(--accent-color);margin-bottom:1rem;font-size:1.2rem}.pair-sources{display:flex;gap:2rem;margin-bottom:1.5rem;flex-wrap:wrap}.dim-source{display:flex;align-items:center;gap:.5rem}.dim-label{font-weight:700;color:var(--text-secondary);min-width:60px}.matrix-note{padding:.3rem .6rem;border-radius:15px;font-size:.8rem;font-weight:700;margin:0 .2rem;transition:all .3s ease}.matrix-note.dim-note{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:var(--text-primary)}.matrix-note.chord-note{border:1px solid rgba(255,255,255,.3);color:#000}.transformation-section{background:#ffffff08;border-radius:10px;padding:1rem;border:1px solid rgba(255,255,255,.05);transition:all .4s ease;position:relative;overflow:hidden}.transformation-section:hover{background:#ffffff14;border-color:var(--accent-color);transform:translateY(-2px)}.transformation-section.type-highlighted{background:#ffd7001a;border-color:var(--accent-color);box-shadow:0 0 15px #ffd7004d}.transformation-section.step-active{animation:matrixPulse 1.5s ease-in-out;border-color:#ff6b6b;box-shadow:0 0 20px #ff6b6b80}@keyframes matrixPulse{0%,to{transform:scale(1)}50%{transform:scale(1.02)}}.transformation-header h6{color:var(--accent-color);margin-bottom:.5rem;font-size:1rem;display:flex;align-items:center;gap:.5rem}.transformation-header p{font-size:.85rem;color:var(--text-secondary);margin-bottom:.3rem}.transformation-header small{font-size:.75rem;color:var(--text-secondary);font-style:italic}.generated-chords{margin-top:1rem}.matrix-chord{background:#ffffff05;border-radius:8px;padding:.8rem;margin-bottom:.8rem;border:1px solid rgba(255,255,255,.05);cursor:pointer;transition:all .3s ease}.matrix-chord:hover{background:#ffffff14;border-color:var(--accent-color);transform:translate(5px)}.chord-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.chord-header strong{color:var(--text-primary);font-size:.95rem}.animate-btn{background:linear-gradient(135deg,#4ecdc4,#44a08d);color:#fff;border:none;padding:.3rem .8rem;border-radius:15px;font-size:.7rem;cursor:pointer;transition:all .3s ease;font-weight:700}.animate-btn:hover{background:linear-gradient(135deg,#44a08d,#4ecdc4);transform:scale(1.05)}.chord-notes-mini{display:flex;gap:.3rem;margin-bottom:.5rem;flex-wrap:wrap}.transformation-details{font-size:.75rem;color:var(--text-secondary);display:flex;gap:.5rem;flex-wrap:wrap}.transformation-details .unchanged{color:var(--text-primary);opacity:.7}.transformation-details .transformed{padding:.2rem .4rem;border-radius:10px;font-weight:700}.transformation-details .raised{background:#4caf5033;color:#4caf50}.transformation-details .lowered{background:#f4433633;color:#f44336}.step-indicator{position:absolute;top:10px;right:10px;background:#ff6b6be6;color:#fff;padding:.5rem;border-radius:8px;font-size:.75rem;z-index:10;box-shadow:0 2px 10px 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