:root{--ink: #1a1208;--paper: #f5f0e8;--aged: #e8dfc8;--rust: #c0392b;--gold: #b8860b;--muted: #8a7355;--muted-dark: #5a4a30;--border: #c8b89a}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--paper);color:var(--ink);font-family:Courier Prime,monospace;min-height:100vh;background-image:repeating-linear-gradient(0deg,transparent,transparent 27px,rgba(180,160,100,.15) 28px),radial-gradient(ellipse at 20% 50%,rgba(200,180,120,.2) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(180,140,80,.15) 0%,transparent 50%)}.main{display:grid;grid-template-columns:280px 1fr;min-height:calc(100vh - 90px)}header{border-bottom:3px double var(--ink);padding:16px 40px;display:flex;align-items:center;gap:20px;background:var(--aged);box-shadow:0 2px 8px #00000026}.header-logo h1{font-family:Playfair Display,serif;font-size:2.2rem;font-weight:900;letter-spacing:-.5px;line-height:1}.header-logo h1 span{color:var(--rust)}.header-logo p{font-size:.75rem;text-transform:uppercase;letter-spacing:3px;color:#6b5b3e;margin-top:2px}.btn-switch-instrument{background:none;border:none;color:var(--muted);font-family:Courier Prime,monospace;font-size:.65rem;letter-spacing:1.5px;text-transform:uppercase;cursor:pointer;padding:4px 0;opacity:.6;transition:opacity .15s,color .15s;white-space:nowrap}.btn-switch-instrument:hover{opacity:1;color:var(--ink)}.subtitle{font-size:.7rem;letter-spacing:2px;text-transform:uppercase;color:var(--muted);border-left:2px solid var(--gold);padding-left:12px;margin-left:auto;text-align:right;line-height:1.6}.controls{background:var(--aged);border-right:2px solid var(--ink);padding:28px 24px;display:flex;flex-direction:column;gap:20px;overflow-y:auto}.section-label{font-size:.6rem;text-transform:uppercase;letter-spacing:4px;color:var(--muted);border-bottom:1px solid var(--gold);padding-bottom:4px;margin-bottom:8px}.control-group{display:flex;flex-direction:column;gap:8px}.control-field{display:flex;flex-direction:column;gap:4px}label{font-size:.75rem;text-transform:uppercase;letter-spacing:2px;color:var(--muted-dark)}select,input[type=number]{background:var(--paper);border:1.5px solid var(--ink);color:var(--ink);font-family:Courier Prime,monospace;font-size:.9rem;padding:8px 12px;width:100%;appearance:none;cursor:pointer;transition:border-color .2s,box-shadow .2s}select:focus,input:focus{outline:none;border-color:var(--rust);box-shadow:2px 2px 0 var(--rust)}.select-wrapper{position:relative}.select-wrapper:after{content:"\25bc";position:absolute;right:10px;top:50%;transform:translateY(-50%);font-size:.6rem;pointer-events:none;color:var(--rust)}.checkbox-row{display:flex;align-items:center;gap:10px;cursor:pointer;padding:6px 0}.checkbox-row input[type=checkbox]{width:16px;height:16px;accent-color:var(--rust);cursor:pointer}.checkbox-row span{font-size:.8rem;letter-spacing:1px}.dev-banner{background:#1a1a2e;color:#e2b96f;text-align:center;padding:8px 16px;font-family:Courier Prime,monospace;font-size:.8rem;font-weight:700;letter-spacing:1px;text-transform:uppercase}.btn-generate{background:var(--ink);color:var(--paper);border:none;font-family:Playfair Display,serif;font-size:1rem;font-weight:700;padding:14px 20px;cursor:pointer;letter-spacing:1px;transition:all .15s;text-transform:uppercase;margin-top:8px;position:relative}.btn-generate:after{content:"";position:absolute;bottom:-4px;right:-4px;width:100%;height:100%;border:2px solid var(--rust);pointer-events:none;transition:all .15s}.btn-generate:hover{background:var(--rust);transform:translate(-2px,-2px)}.btn-generate:hover:after{transform:translate(4px,4px)}.btn-generate:active{transform:translate(0)}.btn-generate:disabled{opacity:.7;cursor:not-allowed;transform:none}.btn-generate:disabled:after{display:none}@keyframes spin{to{transform:rotate(360deg)}}.spinner{display:inline-block;width:12px;height:12px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:middle;margin-right:2px}.btn-export{background:transparent;color:var(--ink);border:1.5px solid var(--ink);font-family:Courier Prime,monospace;font-size:.75rem;padding:10px 16px;cursor:pointer;letter-spacing:2px;text-transform:uppercase;transition:all .15s}.btn-export:hover{background:var(--ink);color:var(--paper)}.btn-fullscreen{background:transparent;border:1.5px solid var(--ink);color:var(--ink);font-family:Courier Prime,monospace;font-size:.7rem;letter-spacing:2px;text-transform:uppercase;padding:7px 12px;display:flex;align-items:center;gap:7px;cursor:pointer;margin-left:auto;flex-shrink:0;transition:background .15s,color .15s;white-space:nowrap}.btn-fullscreen:hover{background:var(--ink);color:var(--paper)}.btn-fullscreen-exit{position:absolute;top:20px;right:20px;background:var(--ink);color:var(--paper);border:none;font-size:1rem;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:10}#notation-container{position:relative}.notation-area{padding:32px 40px;display:flex;flex-direction:column;gap:24px;min-width:0}.exercise-header{display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--ink);padding-bottom:12px;gap:12px}.exercise-title{font-family:Playfair Display,serif;font-size:1.4rem;font-weight:700}.exercise-meta{font-size:.7rem;letter-spacing:3px;text-transform:uppercase;color:var(--muted)}#notation-container{background:#fff;border:1.5px solid var(--border);box-shadow:4px 4px #0000001a,8px 8px #0000000d;min-height:200px;padding:20px;max-width:100%;box-sizing:border-box;width:100%}#notation-container svg{display:block;max-width:100%;height:auto}#notation-container:fullscreen{background:#fff;padding:60px;display:flex;align-items:flex-start;justify-content:center;overflow-y:auto}#notation-container:fullscreen svg{max-width:100%;height:auto}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;gap:12px;color:var(--muted)}.empty-state .big-clef{font-size:5rem;line-height:1;opacity:.3}.empty-state p{font-size:.75rem;letter-spacing:3px;text-transform:uppercase}.info-bar{display:flex;gap:24px;font-size:.72rem;letter-spacing:2px;text-transform:uppercase;color:var(--muted);padding:8px 0;border-top:1px dashed var(--border)}.info-bar span strong{color:var(--ink)}.range-note{font-size:.7rem;letter-spacing:1px;color:var(--muted);padding:8px 12px;border-left:3px solid var(--gold);background:#b8860b0d}.ornament{text-align:center;font-size:1.2rem;color:var(--gold);letter-spacing:8px;opacity:.6}.manage-subscription{text-align:center;padding:16px;border-top:1px solid var(--border)}.btn-manage-subscription{background:none;border:none;color:var(--muted);font-family:Courier Prime,monospace;font-size:.75rem;letter-spacing:1px;text-transform:uppercase;cursor:pointer;text-decoration:underline;text-underline-offset:3px;padding:0}.btn-manage-subscription:hover{color:var(--ink)}.btn-manage-subscription:disabled{cursor:not-allowed;opacity:.5}.manage-subscription-error{display:block;margin-top:8px;color:var(--rust);font-size:.75rem}.error-toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--rust);color:#fff;padding:12px 24px;font-size:.85rem;letter-spacing:1px;box-shadow:4px 4px #0003}.generation-counter{margin-left:auto;font-size:.75rem;letter-spacing:1px;color:var(--muted);padding:6px 12px;background:#b8860b1a;border:1px solid var(--gold)}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--paper);border:3px double var(--ink);box-shadow:8px 8px #0000004d;max-width:450px;width:90%;padding:32px;position:relative;text-align:center}.modal-close{position:absolute;top:12px;right:12px;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--muted);padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center}.modal-close:hover{color:var(--ink)}.modal-content h2{font-family:Playfair Display,serif;font-size:1.8rem;margin-bottom:12px;color:var(--ink)}.modal-content p{font-size:.85rem;color:var(--muted);line-height:1.6;margin-bottom:16px}.subscription-features{background:#b8860b1a;border:1px solid var(--border);padding:16px;margin:20px 0;text-align:left}.subscription-features ul{list-style:none;display:flex;flex-direction:column;gap:8px}.subscription-features li{font-size:.8rem;color:var(--ink)}.subscription-pricing{margin:20px 0}.subscription-pricing .price{font-size:2rem;font-weight:700;color:var(--rust);margin:0}.subscription-pricing .price span{font-size:.8rem;color:var(--muted)}.subscription-pricing .trial{font-size:.75rem;color:var(--gold);margin:4px 0 0}.btn-subscribe{background:var(--rust);color:#fff;border:none;padding:12px 28px;font-family:Courier Prime,monospace;font-size:.85rem;font-weight:700;letter-spacing:1px;cursor:pointer;box-shadow:3px 3px #0003;text-transform:uppercase;width:100%;margin-bottom:8px}.btn-subscribe:hover{background:#a02a21}.btn-subscribe:active{transform:translate(1px,1px);box-shadow:2px 2px #0003}.btn-dismiss{background:none;border:2px solid var(--border);color:var(--muted);padding:8px 20px;font-family:Courier Prime,monospace;font-size:.8rem;letter-spacing:1px;cursor:pointer;width:100%;text-transform:uppercase}.btn-dismiss:hover{color:var(--ink);border-color:var(--ink)}.subscription-toggle{display:flex;background:var(--aged);border:1.5px solid var(--border);padding:3px;margin:20px 0 16px;gap:3px}.toggle-option{flex:1;background:none;border:none;padding:8px 12px;font-family:Courier Prime,monospace;font-size:.72rem;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--muted);cursor:pointer;transition:background .15s,color .15s}.toggle-option:hover{color:var(--ink)}.toggle-active{background:var(--ink);color:var(--paper)}.toggle-active:hover{color:var(--paper)}.email-input{width:100%;box-sizing:border-box;background:var(--paper);border:1.5px solid var(--border);border-bottom:2px solid var(--ink);padding:10px 12px;font-family:Courier Prime,monospace;font-size:.9rem;color:var(--ink);outline:none;margin-bottom:12px;transition:border-color .15s}.email-input::placeholder{color:var(--muted);opacity:.7}.email-input:focus{border-color:var(--gold);border-bottom-color:var(--rust)}.subscription-error{font-size:.78rem;color:var(--rust);margin:-6px 0 10px;text-align:left}.magic-link-sent{font-size:.85rem;color:var(--muted-dark);background:#b8860b1a;border:1px solid var(--border);padding:14px 16px;margin:4px 0 16px;line-height:1.6;text-align:left}.btn-mobile-settings{display:none;background:none;border:1.5px solid var(--ink);color:var(--ink);font-family:Courier Prime,monospace;font-size:.7rem;letter-spacing:2px;text-transform:uppercase;padding:6px 12px;cursor:pointer;white-space:nowrap;transition:background .15s,color .15s}.btn-mobile-settings:hover{background:var(--ink);color:var(--paper)}@media(max-width:640px){header{padding:10px 16px;flex-wrap:wrap;gap:8px}.header-logo h1{font-size:1.5rem}.header-logo p,.subtitle{display:none}.generation-counter{margin-left:0;font-size:.65rem;padding:4px 8px}.btn-mobile-settings{display:block}.main{grid-template-columns:1fr;min-height:unset}.controls{order:2;border-right:none;border-top:2px solid var(--ink);padding:20px 16px}.notation-area{order:1;padding:16px;gap:16px}.main--controls-hidden .controls,.btn-fullscreen,.main--controls-hidden .exercise-header{display:none}.exercise-title{font-size:1.1rem}.exercise-meta{font-size:.6rem;letter-spacing:2px}.info-bar{flex-wrap:wrap;gap:12px;font-size:.65rem}#notation-container{padding:12px}.checkbox-row{padding:10px 0}.checkbox-row input[type=checkbox],.checkbox-row input[type=radio]{width:20px;height:20px;flex-shrink:0}select,input[type=number]{font-size:16px;padding:10px 12px}}.picker-overlay{min-height:100vh;background:var(--paper);background-image:repeating-linear-gradient(0deg,transparent,transparent 27px,rgba(180,160,100,.15) 28px),radial-gradient(ellipse at 20% 50%,rgba(200,180,120,.2) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(180,140,80,.15) 0%,transparent 50%);display:flex;align-items:center;justify-content:center;padding:40px 24px}.picker-inner{max-width:640px;width:100%;text-align:center}.picker-header{margin-bottom:40px}.picker-title{font-family:Playfair Display,serif;font-size:2.4rem;font-weight:900;letter-spacing:-.5px;line-height:1.1;margin:16px 0 8px}.picker-title span{color:var(--rust)}.picker-subtitle{font-size:.75rem;text-transform:uppercase;letter-spacing:3px;color:var(--muted)}.picker-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px;margin-top:8px}.picker-card{background:var(--aged);border:1.5px solid var(--ink);padding:24px 16px 20px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:8px;position:relative;transition:transform .12s,box-shadow .12s;font-family:inherit}.picker-card:after{content:"";position:absolute;bottom:-4px;right:-4px;width:100%;height:100%;border:2px solid var(--gold);pointer-events:none;transition:transform .12s}.picker-card:hover{transform:translate(-2px,-2px);background:var(--paper)}.picker-card:hover:after{transform:translate(4px,4px)}.picker-card:active{transform:translate(0)}.picker-card-icon{font-size:2rem;line-height:1}.picker-card-name{font-family:Playfair Display,serif;font-size:1rem;font-weight:700;color:var(--ink)}.picker-card-clef{font-size:.6rem;text-transform:uppercase;letter-spacing:2px;color:var(--muted)}