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.valve-button{fill:#fff}.mouthpiece{cursor:pointer}.mouth-stem{stroke:#b9c0c3;stroke-width:11px;stroke-linecap:round}.mouth-cup{fill:url(#partsSilverGrad);stroke:#596064;stroke-width:3px;transition:filter .15s}.mouth-glow{fill:none;stroke:#fff;stroke-width:3px;stroke-linecap:round;pointer-events:none}.mouthpiece.active .mouth-cup{filter:drop-shadow(0 0 10px #f5c542bf)}.finger-hook{fill:none;stroke:url(#partsGoldGrad);stroke-width:8px;stroke-linecap:round;stroke-linejoin:round;cursor:pointer;transition:filter .15s}.water-key{cursor:pointer}.water-key circle{fill:url(#partsSilverGrad);stroke:#596064;stroke-width:3px;transition:filter .15s}.water-key line{stroke:#bdc4c7;stroke-width:7px;stroke-linecap:round}.water-key.active circle,.water-key.active line{filter:drop-shadow(0 0 9px #f5c542bf)}.painted-highlight{fill:none;stroke:#ffe486;stroke-width:3px;stroke-linecap:round;pointer-events:none}.hotspot{cursor:pointer;outline:none}.leader{stroke:var(--border);stroke-width:2px;stroke-dasharray:4 4;transition:stroke .15s}.leader-dot{fill:var(--muted);transition:fill .15s}.marker{fill:var(--bg-elev);stroke:var(--gold);stroke-width:2.5px;transition:fill .15s,stroke .15s,r .15s}.marker-num{fill:var(--gold-bright);text-anchor:middle;pointer-events:none;font-size:20px;font-weight:800;font-family:var(--font-sans)}.hotspot.active .marker{fill:var(--gold);stroke:var(--gold-bright)}.hotspot.active .marker-num{fill:#17130a}.hotspot.active .leader{stroke:var(--gold);stroke-dasharray:none}.hotspot.active .leader-dot{fill:var(--gold-bright)}.marker-label{fill:var(--text);font-size:21px;font-weight:700;font-family:var(--font-sans);paint-order:stroke;stroke:var(--bg);stroke-width:6px;stroke-linejoin:round;pointer-events:none}.part-readout{background:#f5c5420f;border:1px solid #f5c5422e;border-radius:12px;align-items:flex-start;gap:14px;margin:-4px 2px 0;padding:14px 16px;display:flex}.part-readout-num{color:var(--gold-bright);letter-spacing:.08em;flex:none;font-size:.82rem;font-weight:900}.part-readout b{color:var(--text);margin-bottom:4px;display:block}.part-readout p{color:var(--muted);margin:0;font-size:.92rem;line-height:1.5}.parts-grid{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.part{text-align:left;width:100%;font:inherit;background:var(--bg-card);border:1px solid var(--border);color:inherit;cursor:pointer;border-radius:12px;align-items:flex-start;gap:14px;padding:14px 16px;transition:border-color .15s,background .15s,transform .15s;display:flex}.part:hover,.part.active{border-color:var(--gold);background:#f5c54214;transform:translateY(-2px)}.part-num{width:28px;height:28px;color:var(--gold-bright);background:#f5c54224;border-radius:50%;flex:none;place-items:center;font-size:.9rem;font-weight:800;display:grid}.part.active .part-num{background:var(--gold);color:#17130a}.part b{color:var(--gold-bright);margin-bottom:4px;display:block}.part-copy{display:block}.part-copy span{color:var(--muted);font-size:.92rem;line-height:1.5}.footer{border-top:1px solid var(--border);margin-top:40px;padding:40px 0}.footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.footer .credit{color:var(--muted);white-space:nowrap;font-size:.92rem}.footer .credit svg{vertical-align:middle;display:inline-block}.footer .credit b{color:var(--gold-bright)}.footer-social{gap:12px;display:flex}.footer-social a{border:1px solid var(--border);width:38px;height:38px;color:var(--muted);border-radius:10px;place-items:center;transition:color .15s,border-color .15s;display:grid}.footer-social a:hover{color:var(--gold-bright);border-color:var(--gold)}@media(max-width:900px){.hero{grid-template-columns:1fr;min-height:auto}.hero-canvas{order:-1;height:320px}.card-grid,.player,.parts-grid{grid-template-columns:1fr}.nav-actions{gap:8px}.notation-label{display:none}}@media(max-width:560px){.lesson-index-list{grid-template-columns:1fr;padding-bottom:52px}.lesson-page{padding-top:26px}.lesson-pagination{gap:10px}.lesson-pagination-link{padding:14px 12px}.lesson-pagination-link strong{font-size:.9rem}.nav-inner{padding-left:14px;padding-right:14px}.brand{font-size:1rem}.nav-actions{gap:4px}.nav-links{gap:0}.nav-link{padding-left:8px;padding-right:8px;font-size:.86rem}.notation-options button{padding-left:6px;padding-right:6px;font-size:.66rem}}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}