@import"https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=IBM+Plex+Sans:wght@400;500;600&family=JetBrains+Mono:wght@500&display=swap";:root{--color-cream: #faf6f0;--color-paper: #f5efe6;--color-ink: #1a1612;--color-ink-soft: #3d362e;--color-amber: #d4a853;--color-amber-glow: #e8c17a;--color-rosewood: #4a2c2a;--color-maple: #c9a66b;--color-fret-wire: #b8a88a;--color-string: #8b7355;--color-muted: #9a8f82;--font-display: "DM Serif Display", Georgia, serif;--font-body: "IBM Plex Sans", system-ui, sans-serif;--font-mono: "JetBrains Mono", monospace}.dark-mode{--color-cream: #1a1612;--color-paper: #252118;--color-ink: #faf6f0;--color-ink-soft: #d4cfc5;--color-amber: #e8c17a;--color-amber-glow: #f5d99e;--color-rosewood: #2a1816;--color-maple: #8b7355;--color-fret-wire: #6b5d4a;--color-string: #5a4a38;--color-muted: #9a8f82}*{box-sizing:border-box;margin:0;padding:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.25rem;font-family:var(--font-body);font-size:.875rem;font-weight:600;line-height:1;text-decoration:none;border-radius:10px;cursor:pointer;transition:all .2s ease;white-space:nowrap}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{color:var(--color-ink);background:var(--color-amber);border:1.5px solid var(--color-amber)}.btn-primary:hover:not(:disabled){background:var(--color-amber-glow);border-color:var(--color-amber-glow);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{color:var(--color-ink);background:var(--color-cream);border:1.5px solid rgba(26,22,18,.15)}.btn-secondary:hover:not(:disabled){border-color:var(--color-amber);background:var(--color-paper);transform:translateY(-1px)}.btn-secondary:active:not(:disabled){transform:translateY(0)}.btn-secondary.active{background:var(--color-amber);border-color:var(--color-amber);color:var(--color-ink)}.btn-ghost{color:var(--color-ink-soft);background:transparent;border:1.5px solid transparent}.btn-ghost:hover:not(:disabled){color:var(--color-ink);background:var(--color-paper);border-color:#1a16121a}.btn-ghost.active{color:var(--color-ink);background:#d4a85326;border-color:var(--color-amber)}.btn-icon{width:2.75rem;height:2.75rem;padding:0;color:var(--color-ink);background:var(--color-cream);border:1.5px solid rgba(26,22,18,.15)}.btn-icon:hover:not(:disabled){border-color:var(--color-amber);background:var(--color-paper);transform:translateY(-1px)}.btn-icon:active:not(:disabled){transform:translateY(0)}.btn-icon.active{background:var(--color-amber);border-color:var(--color-amber)}.btn-accent{color:#fff;background:linear-gradient(135deg,#6366f1,#8b5cf6);border:1.5px solid #6366f1}.btn-accent:hover:not(:disabled){background:linear-gradient(135deg,#7c7ff7,#9d7afa);border-color:#7c7ff7;transform:translateY(-1px);box-shadow:0 4px 12px #6366f14d}.btn-sm{padding:.5rem .875rem;font-size:.8rem;border-radius:8px}.btn-lg{padding:.875rem 1.5rem;font-size:1rem}.btn-icon.btn-sm{width:2.25rem;height:2.25rem}.btn-icon.btn-lg{width:3.25rem;height:3.25rem}.btn-play:before{content:"";width:0;height:0;border-left:8px solid currentColor;border-top:5px solid transparent;border-bottom:5px solid transparent;margin-right:.25rem}.btn:focus{outline:none}.btn:focus-visible{outline:2px solid var(--color-amber);outline-offset:2px}.btn-full{width:100%}.btn-group{display:flex;gap:.5rem}.btn-group-tight{gap:.25rem}.btn-group-tight .btn{border-radius:8px}body{min-height:100vh;background:var(--color-cream);background-image:radial-gradient(ellipse at 20% 0%,rgba(212,168,83,.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 100%,rgba(74,44,42,.06) 0%,transparent 50%);color:var(--color-ink);font-family:var(--font-body);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background-color .3s ease,color .3s ease}#app{min-height:100vh}.app-shell{max-width:1100px;margin:0 auto;padding:3rem 1.5rem 5rem;display:flex;flex-direction:column;gap:2.5rem}.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;position:relative}.header-content{flex:1;text-align:center}.app-title{font-family:var(--font-display);font-size:clamp(2.5rem,6vw,3.5rem);font-weight:400;color:var(--color-ink);letter-spacing:-.02em;margin-bottom:.25rem}.app-subtitle{font-size:1rem;color:var(--color-muted);font-weight:400}.app-header .btn-icon svg{width:20px;height:20px}.control-panel{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center;align-items:flex-end;padding:1.5rem 2rem;background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px;box-shadow:0 1px 3px #1a16120a,0 8px 24px #1a16120f}.control{display:flex;flex-direction:column;gap:.5rem;min-width:180px}.control-row{display:flex;align-items:stretch;gap:.5rem}.control-row select{flex:1}.control-row .btn-icon{width:2.75rem;height:auto;font-size:1.5rem;font-weight:500}.control label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted)}.control select{appearance:none;padding:.875rem 2.5rem .875rem 1.125rem;font-family:var(--font-body);font-size:1rem;font-weight:500;color:var(--color-ink);background:var(--color-cream);border:1.5px solid rgba(26,22,18,.15);border-radius:10px;cursor:pointer;transition:border-color .2s,box-shadow .2s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%233d362e' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}.control select:hover{border-color:var(--color-amber)}.control select:focus{outline:none;border-color:var(--color-amber);box-shadow:0 0 0 3px #d4a85333}.shape-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1.5rem}.empty-state{grid-column:1 / -1;text-align:center;padding:3rem 2rem;color:var(--color-muted);font-style:italic;background:var(--color-paper);border:1px dashed rgba(26,22,18,.15);border-radius:16px}.shape-card{background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px;padding:1.5rem;display:flex;flex-direction:column;gap:1.25rem;box-shadow:0 1px 3px #1a161208,0 8px 24px #1a16120d;transition:transform .2s ease,box-shadow .2s ease}.shape-card:hover{transform:translateY(-2px);box-shadow:0 2px 8px #1a16120d,0 16px 40px #1a161214}.shape-card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.shape-card-info{flex:1}.shape-tag{display:inline-block;font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.12em;color:var(--color-amber);background:#d4a8531f;padding:.25rem .625rem;border-radius:4px;margin-bottom:.5rem}.shape-card h3{font-family:var(--font-display);font-size:1.5rem;font-weight:400;color:var(--color-ink);margin:0 0 .25rem;letter-spacing:-.01em}.shape-description{font-size:.9rem;color:var(--color-ink-soft);line-height:1.5}.shape-visual{position:relative}.fretboard-shell{background:linear-gradient(135deg,var(--color-rosewood) 0%,#3a2220 100%);border-radius:12px;padding:.75rem;box-shadow:inset 0 1px #ffffff0d,0 4px 12px #1a161226}.fretboard-bg{fill:#2d1f1e;stroke:#ffffff08}.fretboard-string{stroke:var(--color-string);stroke-width:2;stroke-linecap:round}.fretboard-string[data-string="6"]{stroke-width:3}.fretboard-string[data-string="5"]{stroke-width:2.5}.fretboard-string[data-string="4"]{stroke-width:2.2}.fretboard-string[data-string="3"]{stroke-width:2}.fretboard-string[data-string="2"]{stroke-width:1.8}.fretboard-string[data-string="1"]{stroke-width:1.5}.fretboard-fret{stroke:var(--color-fret-wire);stroke-width:2}.fretboard-nut{stroke:#d4cfc5;stroke-width:6;stroke-linecap:round}.finger-dot{stroke:#ffffff4d;stroke-width:1.5;transition:transform .15s ease}.finger-dot.root{stroke:#ffffff80;stroke-width:2}.finger-label{font-family:var(--font-mono);font-size:.65rem;font-weight:500;fill:var(--color-cream);pointer-events:none;text-anchor:middle}.barre{opacity:.95}.open-indicator,.mute-indicator{font-family:var(--font-mono);font-size:.85rem;font-weight:500;fill:var(--color-cream)}.mute-indicator{fill:#faf6f080}.fret-label{font-family:var(--font-mono);font-size:.7rem;fill:#faf6f099;text-anchor:middle}.string-label{font-family:var(--font-mono);font-size:.65rem;fill:#faf6f073;text-anchor:end}.root-fret-overlay{display:flex;align-items:center;gap:.75rem;margin-top:.75rem;padding:.5rem .875rem;background:#1a16120a;border:1px solid rgba(26,22,18,.08);border-radius:8px}.root-fret-overlay.local{position:static;transform:none}.root-label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted)}.root-fret-pills{display:flex;gap:.375rem}.root-fret-pills span{font-family:var(--font-mono);font-size:.8rem;font-weight:500;padding:.25rem .625rem;background:var(--color-cream);border:1px solid rgba(26,22,18,.1);border-radius:6px;color:var(--color-ink-soft)}@media(max-width:720px){.app-shell{padding:2rem 1rem 4rem;gap:2rem}.control-panel{padding:1.25rem}.control{flex:1;min-width:140px}.shape-grid{grid-template-columns:1fr;gap:1.25rem}.shape-card-header{flex-direction:column;gap:1rem}.shape-card-header .btn{width:100%;justify-content:center}}::selection{background:#d4a8534d}:focus-visible{outline:2px solid var(--color-amber);outline-offset:2px}.triad-explorer{display:flex;flex-direction:column;gap:1.5rem;padding:2rem 0;margin-top:2rem;border-top:1px solid rgba(26,22,18,.08)}.triad-title{font-family:var(--font-display);font-size:clamp(1.75rem,4vw,2.25rem);font-weight:400;color:var(--color-ink);text-align:center;letter-spacing:-.02em}.triad-subtitle{font-size:.95rem;color:var(--color-muted);text-align:center;margin-top:-.75rem}.triad-empty-state{text-align:center;padding:3rem 2rem;color:var(--color-muted);font-style:italic;background:var(--color-paper);border:1px dashed rgba(26,22,18,.15);border-radius:16px}.triad-neck-shell{background:linear-gradient(135deg,#0a0515,#1c0a28);border-radius:16px;padding:1rem;box-shadow:inset 0 1px #ffffff08,0 8px 24px #1a161233;max-width:100%;overflow:hidden}.triad-neck-bg{fill:#150a1e;stroke:#ffffff05}.triad-string{stroke:var(--color-string);stroke-linecap:round;opacity:.7}.triad-fret{stroke:var(--color-fret-wire);stroke-width:1.5;opacity:.5}.triad-nut{stroke:#d4cfc5;stroke-width:5;stroke-linecap:round;opacity:.6}.fret-marker{fill:#ffffff26}.triad-note-group{animation:fadeInScale .4s ease-out forwards;opacity:0;transform-origin:center}@keyframes fadeInScale{0%{opacity:0;transform:scale(.5)}to{opacity:1;transform:scale(1)}}.triad-note-dot{stroke:#fff6;stroke-width:2}.triad-note-label{font-family:var(--font-mono);font-size:.7rem;font-weight:500;fill:var(--color-cream);pointer-events:none;text-anchor:middle}.triad-string-label{font-family:var(--font-mono);font-size:.65rem;fill:#faf6f066;text-anchor:end}.triad-controls{display:flex;flex-direction:column;gap:1.25rem;padding:1.5rem 2rem;background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px;box-shadow:0 1px 3px #1a16120a,0 8px 24px #1a16120f;max-width:700px;margin:0 auto;width:100%}.triad-progress-section{display:flex;flex-direction:column;gap:.5rem}.triad-position-indicator{font-size:.875rem;font-weight:600;color:var(--color-ink-soft);text-align:center}.triad-progress-bar{height:6px;background:#1a161214;border-radius:3px;overflow:hidden}.triad-progress-fill{height:100%;background:linear-gradient(90deg,var(--color-amber) 0%,var(--color-amber-glow) 100%);border-radius:3px;transition:width .3s ease}.speed-section{display:flex;align-items:center;justify-content:center;gap:1rem;flex-wrap:wrap}.speed-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted)}.audio-icon{font-size:1.25rem;line-height:1}@media(max-width:720px){.triad-controls{padding:1.25rem 1rem}.triad-controls .btn-group{flex-wrap:wrap}.triad-controls .btn{flex:1;min-width:80px}.triad-controls .btn-primary{flex-basis:100%;order:-1}.speed-section{flex-direction:column;gap:.75rem}.speed-section .btn-group{width:100%}.speed-section .btn{flex:1}}.progression-viewer{display:flex;flex-direction:column;gap:1.5rem;padding:2rem 0;margin-top:2rem;border-top:1px solid rgba(26,22,18,.08)}.progression-title{font-family:var(--font-display);font-size:clamp(1.75rem,4vw,2.25rem);font-weight:400;color:var(--color-ink);text-align:center;letter-spacing:-.02em}.progression-subtitle{font-size:.95rem;color:var(--color-muted);text-align:center;margin-top:-.75rem}.progression-empty{text-align:center;padding:2rem;color:var(--color-muted);font-style:italic}.progression-selector{display:flex;flex-direction:column;gap:.5rem;max-width:700px;margin:0 auto;width:100%}.progression-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted);text-align:center}.progression-select{appearance:none;padding:.875rem 2.5rem .875rem 1.125rem;font-family:var(--font-body);font-size:1rem;font-weight:500;color:var(--color-ink);background:var(--color-cream);border:1.5px solid rgba(26,22,18,.15);border-radius:10px;cursor:pointer;transition:border-color .2s,box-shadow .2s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%233d362e' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}.progression-select:hover{border-color:var(--color-amber)}.progression-select:focus{outline:none;border-color:var(--color-amber);box-shadow:0 0 0 3px #d4a85333}.progression-chords{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;padding:1rem 0;max-width:700px;margin:0 auto;width:100%}.progression-chord-card{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1.5rem 2rem;background:var(--color-paper);border:2px solid rgba(26,22,18,.1);border-radius:12px;cursor:pointer;transition:all .2s;min-width:120px}.progression-chord-card:hover{border-color:var(--color-amber);transform:translateY(-2px);box-shadow:0 4px 12px #1a16121a}.progression-chord-card.active{background:var(--color-amber);border-color:var(--color-amber);transform:scale(1.05);box-shadow:0 8px 24px #d4a8534d}.chord-degree{font-family:var(--font-mono);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted)}.progression-chord-card.active .chord-degree{color:var(--color-ink)}.chord-name{font-family:var(--font-display);font-size:1.5rem;font-weight:400;color:var(--color-ink);letter-spacing:-.01em}.controls-panel{display:flex;flex-direction:column;gap:1.25rem;padding:1.5rem 2rem;background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px;box-shadow:0 1px 3px #1a16120a,0 8px 24px #1a16120f;max-width:700px;margin:0 auto;width:100%}.scale-explorer{display:flex;flex-direction:column;gap:1.5rem;padding:2rem 0;margin-top:2rem;border-top:1px solid rgba(26,22,18,.08)}.scale-title{font-family:var(--font-display);font-size:clamp(1.75rem,4vw,2.25rem);font-weight:400;color:var(--color-ink);text-align:center;letter-spacing:-.02em}.scale-subtitle{font-size:.95rem;color:var(--color-muted);text-align:center;margin-top:-.75rem}.scale-empty{text-align:center;padding:2rem;color:var(--color-muted);font-style:italic}.scale-selector{display:flex;flex-direction:column;gap:.5rem;max-width:700px;margin:0 auto;width:100%}.scale-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted);text-align:center}.scale-select{appearance:none;padding:.875rem 2.5rem .875rem 1.125rem;font-family:var(--font-body);font-size:1rem;font-weight:500;color:var(--color-ink);background:var(--color-cream);border:1.5px solid rgba(26,22,18,.15);border-radius:10px;cursor:pointer;transition:border-color .2s,box-shadow .2s;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%233d362e' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}.scale-select:hover{border-color:var(--color-amber)}.scale-select:focus{outline:none;border-color:var(--color-amber);box-shadow:0 0 0 3px #d4a85333}.scale-neck-container{display:flex;flex-direction:column;gap:1rem}.scale-neck-header{text-align:center}.scale-neck-title{font-family:var(--font-display);font-size:1.5rem;font-weight:400;color:var(--color-ink);letter-spacing:-.01em}.scale-neck-shell{background:linear-gradient(135deg,#1a1042,#2d1558);border-radius:16px;padding:1rem;box-shadow:inset 0 1px #ffffff08,0 8px 24px #1a161233;max-width:100%;overflow:hidden}.scale-neck-bg{fill:#1f0f3a;stroke:#ffffff05}.scale-string{stroke:var(--color-string);stroke-linecap:round;opacity:.7}.scale-fret{stroke:var(--color-fret-wire);stroke-width:1.5;opacity:.5}.scale-nut{stroke:#d4cfc5;stroke-width:5;stroke-linecap:round;opacity:.6}.scale-fret-marker{fill:#ffffff1f}.scale-note-group{transition:opacity .2s}.scale-note-dot{stroke:#fff6;stroke-width:2}.scale-note-label{font-family:var(--font-mono);font-size:.65rem;font-weight:500;fill:var(--color-cream);pointer-events:none;text-anchor:middle}.scale-string-label{font-family:var(--font-mono);font-size:.65rem;fill:#faf6f066;text-anchor:end}.scale-info{padding:1.5rem 2rem;background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px}.scale-info-section{display:flex;flex-direction:column;gap:.75rem}.scale-info-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--color-muted);text-align:center}.scale-intervals{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center}.scale-interval-badge{font-family:var(--font-mono);font-size:.875rem;font-weight:600;padding:.5rem 1rem;background:var(--color-cream);border:1px solid rgba(26,22,18,.1);border-radius:8px;color:var(--color-ink-soft)}.circle-of-fifths-section{display:flex;flex-direction:column;gap:1.5rem;padding:2rem 0;margin-top:2rem;border-top:1px solid rgba(26,22,18,.08)}.circle-title{font-family:var(--font-display);font-size:clamp(1.75rem,4vw,2.25rem);font-weight:400;color:var(--color-ink);text-align:center;letter-spacing:-.02em}.circle-subtitle{font-size:.95rem;color:var(--color-muted);text-align:center;margin-top:-.75rem}.circle-description{max-width:900px;margin:0 auto;padding:2rem;background:var(--color-paper);border:1px solid rgba(26,22,18,.08);border-radius:16px;box-shadow:0 1px 3px #1a16120a,0 8px 24px #1a16120f}.circle-description-title{font-family:var(--font-display);font-size:1.5rem;font-weight:400;color:var(--color-ink);margin-bottom:1rem;letter-spacing:-.01em}.circle-description-content{display:flex;flex-direction:column;gap:1rem}.circle-description-content p{font-size:1rem;line-height:1.7;color:var(--color-ink-soft)}.circle-description-subtitle{font-size:1rem;font-weight:600;color:var(--color-ink);margin-top:.5rem;margin-bottom:.5rem}.circle-description-list{display:flex;flex-direction:column;gap:1rem;list-style:none;padding:0}.circle-description-list li{padding-left:1.5rem;position:relative;font-size:.95rem;line-height:1.6;color:var(--color-ink-soft)}.circle-description-list li:before{content:"•";position:absolute;left:0;color:var(--color-amber);font-size:1.5rem;line-height:1.2}.circle-description-list li 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