:root{--background:#0a0a0a;--foreground:#ededed;--foreground-muted:#aaa;--foreground-subtle:#666;--primary:#bb86fc;--primary-variant:#3700b3;--secondary:#03dac6;--surface:#121212;--surface-hover:#1e1e1e;--surface-elevated:#222;--error:#cf6679;--success:#10b981;--warning:#f59e0b;--border:#ffffff1a;--border-hover:#fff3;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;--font-mono:"Fira Code","Roboto Mono",monospace}[data-theme=light]{--background:#fff;--foreground:#1a1a1a;--foreground-muted:#555;--foreground-subtle:#888;--primary:#7c3aed;--primary-variant:#5b21b6;--secondary:#0891b2;--surface:#f5f5f5;--surface-hover:#e8e8e8;--surface-elevated:#fff;--error:#dc2626;--success:#059669;--warning:#d97706;--border:#0000001a;--border-hover:#0003;--shadow-sm:0 2px 4px #0000001a;--shadow-md:0 4px 12px #00000026;--shadow-lg:0 10px 30px #0003}:root{--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--transition-fast:.15s ease;--transition-normal:.2s ease;--transition-slow:.3s ease;--shadow-sm:0 2px 4px #0003;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 10px 30px #00000080;--focus-ring:0 0 0 2px var(--background),0 0 0 4px var(--primary)}*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--background);max-width:100vw;color:var(--foreground);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;line-height:1.5;overflow-x:hidden}:focus-visible{box-shadow:var(--focus-ring);outline:none}.skip-link{background:var(--primary);color:#000;padding:var(--spacing-sm)var(--spacing-md);z-index:10000;border-radius:0 0 var(--radius-md)0;font-weight:600;text-decoration:none;position:absolute;top:-40px;left:0}.skip-link:focus{top:0}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.container{max-width:1200px;padding:0 var(--spacing-lg);margin:0 auto}@media (max-width:768px){.container{padding:0 var(--spacing-md)}}.btn{border-radius:var(--radius-md);transition:all var(--transition-normal);justify-content:center;align-items:center;gap:var(--spacing-sm);border:none;padding:10px 20px;font-weight:600;text-decoration:none;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-variant));color:#fff}.btn-primary:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.btn-secondary{border:1px solid var(--foreground);color:var(--foreground);background:0 0}.btn-secondary:hover:not(:disabled){background:#ffffff1a}.btn-danger{border:1px solid var(--error);color:var(--error);background:0 0}.btn-danger:hover:not(:disabled){background:var(--error);color:#fff}.btn-icon{padding:var(--spacing-sm);color:var(--foreground-muted);border-radius:var(--radius-full);background:0 0;border:none;justify-content:center;align-items:center;min-width:40px;min-height:40px;display:flex}.btn-icon:hover{color:var(--foreground);background:#ffffff1a}.card{background-color:var(--surface);border-radius:var(--radius-lg);padding:var(--spacing-lg);border:1px solid var(--border);transition:transform var(--transition-normal),box-shadow var(--transition-normal),border-color var(--transition-normal);display:block}.card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover);transform:translateY(-2px)}.card-clickable{cursor:pointer}.card-clickable:focus-visible{border-color:var(--primary)}.form-group{margin-bottom:var(--spacing-lg)}.form-label{margin-bottom:var(--spacing-sm);color:var(--foreground-muted);font-size:.9rem;font-weight:500;display:block}.form-input{background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);width:100%;color:var(--foreground);transition:border-color var(--transition-fast);padding:12px;font-size:1rem}.form-input:hover{border-color:var(--border-hover)}.form-input:focus{border-color:var(--primary);outline:none}.form-input::placeholder{color:var(--foreground-subtle)}.form-hint{color:var(--foreground-subtle);margin-top:var(--spacing-xs);font-size:.8rem}.editor-container{font-family:var(--font-mono);background-color:var(--surface);color:var(--foreground);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--spacing-lg);resize:vertical;outline:none;width:100%;min-height:500px;font-size:16px;line-height:1.6}.editor-container:focus{border-color:var(--primary)}@media (max-width:768px){.editor-container{min-height:300px;font-size:14px}}.chord-line{color:var(--secondary);font-weight:700}h1,h2,h3{letter-spacing:-.02em;line-height:1.2}h1{-webkit-text-fill-color:transparent;background:linear-gradient(90deg,#fff,#aaa);-webkit-background-clip:text;background-clip:text;margin-bottom:1rem;font-size:2.5rem}@media (max-width:768px){h1{font-size:1.75rem}}h2{margin-bottom:.75rem;font-size:2rem}@media (max-width:768px){h2{font-size:1.5rem}}h3{margin-bottom:.5rem;font-size:1.25rem}.grid{gap:var(--spacing-lg);display:grid}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-auto{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}@media (max-width:1024px){.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}.flex{display:flex}.flex-wrap{flex-wrap:wrap}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.navbar{border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100;background-color:#0a0a0acc;margin-bottom:2rem;padding:1rem 0;position:sticky;top:0}.navbar-brand{background:linear-gradient(to right,var(--primary),var(--secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.5rem;font-weight:700}.navbar-brand:hover{text-decoration:none}.dropdown{position:relative}.dropdown-menu{background-color:var(--surface-hover);border-radius:var(--radius-md);padding:var(--spacing-sm)0;z-index:1000;min-width:180px;box-shadow:var(--shadow-lg);border:1px solid #ffffff26;position:absolute;top:120%;right:0}.dropdown-item{text-align:left;width:100%;color:var(--foreground);cursor:pointer;transition:background-color var(--transition-fast);background:0 0;border:none;padding:.75rem 1rem;font-size:.9rem;display:block}.dropdown-item:hover{background-color:#ffffff0d;text-decoration:none}.song-card{padding:0;position:relative}.song-card-content{padding:var(--spacing-lg);width:100%;height:100%;display:block}.song-card-list .song-card-content{justify-content:space-between;align-items:center;padding:15px 20px;display:flex}.song-card-actions{z-index:2;position:absolute;top:10px;right:10px}.song-card-menu{color:#fff;border-radius:var(--radius-full);cursor:pointer;width:32px;height:32px;transition:background-color var(--transition-fast);background:#00000080;border:none;justify-content:center;align-items:center;display:flex}.song-card-menu:hover{background:#000000b3}.playlist-dropdown{background:var(--surface-elevated);border-radius:var(--radius-md);padding:var(--spacing-sm);z-index:10;min-width:180px;box-shadow:var(--shadow-lg);border:1px solid #ffffff26;position:absolute;top:45px;right:0}.search-container{width:100%;max-width:400px;position:relative}.search-input{background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-full);width:100%;color:var(--foreground);transition:all var(--transition-fast);padding:10px 16px 10px 40px;font-size:.95rem}.search-input:focus{border-color:var(--primary);background-color:var(--surface-hover)}.search-icon{color:var(--foreground-muted);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.search-shortcut{background:var(--surface-elevated);border-radius:var(--radius-sm);color:var(--foreground-subtle);border:1px solid var(--border);padding:2px 6px;font-size:.75rem;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.controls-panel{background-color:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--border);z-index:100;flex-direction:column;gap:15px;max-width:calc(100vw - 40px);padding:15px;display:flex;position:fixed;bottom:20px;right:20px}@media (max-width:768px){.controls-panel{padding:12px;bottom:10px;left:10px;right:10px}}.chord-drawer{z-index:90;background-color:var(--background);border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);transition:all var(--transition-slow);margin-bottom:2rem;position:sticky;top:70px}.chord-drawer-toggle{cursor:pointer;-webkit-user-select:none;user-select:none;color:var(--foreground-muted);padding:var(--spacing-sm);margin:-var(--spacing-sm);border-radius:var(--radius-md);background:0 0;border:none;align-items:center;font-size:.9rem;display:flex}.chord-drawer-toggle:hover{background:#ffffff0d}.chord-drawer-content{-webkit-overflow-scrolling:touch;flex-wrap:nowrap;gap:15px;margin-top:15px;padding-bottom:10px;display:flex;overflow-x:auto}@media (max-width:768px){.chord-drawer-content{gap:10px}}.chord-drawer-item{text-align:center;border-radius:var(--radius-md);transition:background-color var(--transition-fast);background-color:#ffffff08;border:1px solid #0000;flex:none;min-width:80px;padding:5px}.chord-drawer-item:hover{background-color:#ffffff0f}.chord-drawer-item[data-has-variations=true]{cursor:pointer}.chord-tooltip{cursor:pointer;color:var(--primary);font-weight:700;display:inline-block;position:relative}.chord-tooltip[data-pinned=true]{border-bottom:2px solid var(--primary)}.chord-tooltip-content{background-color:var(--surface-elevated);border-radius:var(--radius-md);padding:var(--spacing-sm);z-index:1000;box-shadow:var(--shadow-lg);text-align:center;border:1px solid #ffffff26;min-width:140px;margin-bottom:5px;position:absolute;bottom:100%;left:50%;transform:translate(-50%)}.modal-overlay{z-index:1000;padding:var(--spacing-lg);background-color:#000c;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--surface);padding:var(--spacing-xl);border-radius:var(--radius-lg);border:1px solid var(--border);width:100%;max-width:500px;box-shadow:var(--shadow-lg);max-height:90vh;position:relative;overflow-y:auto}.modal-close{color:var(--foreground-muted);cursor:pointer;padding:var(--spacing-xs);border-radius:var(--radius-sm);background:0 0;border:none;font-size:1.5rem;line-height:1;position:absolute;top:15px;right:15px}.modal-close:hover{color:var(--foreground);background:#ffffff1a}.view-toggle{border-radius:var(--radius-full);background-color:#ffffff1a;padding:4px;display:flex}.view-toggle-btn{color:var(--foreground-muted);border-radius:var(--radius-full);cursor:pointer;transition:all var(--transition-fast);background:0 0;border:none;padding:6px 16px;font-weight:400}.view-toggle-btn[data-active=true]{background:var(--primary);color:#000;font-weight:700}.empty-state{text-align:center;padding:var(--spacing-2xl);border-radius:var(--radius-md);border:1px dashed #fff3}.empty-state-text{color:var(--foreground-subtle);margin-bottom:var(--spacing-md)}.badge{background:var(--surface-elevated);border-radius:var(--radius-full);color:var(--foreground-muted);border:1px solid var(--border);align-items:center;padding:2px 8px;font-size:.75rem;display:inline-flex}.badge-primary{background:var(--primary);color:#000;border-color:var(--primary)}.favorite-btn{cursor:pointer;padding:var(--spacing-xs);color:var(--foreground-muted);transition:all var(--transition-fast);background:0 0;border:none;font-size:1.2rem}.favorite-btn:hover{color:#f59e0b;transform:scale(1.1)}.favorite-btn[data-favorited=true]{color:#f59e0b}.tuner-gauge{border-radius:var(--radius-full);background:#ffffff1a;width:100%;height:40px;position:relative;overflow:hidden}.tuner-center-line{z-index:1;background:#fff;width:2px;position:absolute;top:0;bottom:0;left:50%}.tuner-indicator{border-radius:var(--radius-full);width:10px;transition:left .1s;position:absolute;top:5px;bottom:5px;transform:translate(-50%)}.tuner-indicator[data-in-tune=true]{background:var(--secondary)}.tuner-indicator[data-in-tune=false]{background:var(--error)}.metronome-beat{border-radius:var(--radius-full);background-color:var(--primary);width:10px;height:10px;transition:opacity .1s}.metronome-beat[data-active=true]{opacity:1}.metronome-beat[data-active=false]{opacity:.3}.playlist-bar{padding:var(--spacing-sm)var(--spacing-md);background:var(--surface-elevated);border-radius:var(--radius-md);justify-content:space-between;align-items:center;gap:var(--spacing-sm);flex-wrap:wrap;margin-bottom:1rem;display:flex}@media (max-width:768px){.playlist-bar{flex-direction:column;align-items:stretch}}.song-details{gap:var(--spacing-xl);flex-wrap:wrap;align-items:center;display:flex}.song-detail-item{gap:var(--spacing-xs);flex-direction:column;display:flex}.song-detail-label{color:var(--foreground-muted);font-size:.9rem}.song-detail-value{font-weight:700}input[type=range]{appearance:none;border-radius:var(--radius-full);cursor:pointer;background:#fff3;height:6px}input[type=range]::-webkit-slider-thumb{appearance:none;border-radius:var(--radius-full);background:var(--primary);cursor:pointer;border:none;width:16px;height:16px}input[type=range]::-moz-range-thumb{border-radius:var(--radius-full);background:var(--primary);cursor:pointer;border:none;width:16px;height:16px}input[type=range]:focus-visible{box-shadow:none}input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:var(--focus-ring)}input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}.spinner{border:2px solid var(--foreground-muted);border-radius:var(--radius-full);border-top-color:var(--primary);width:20px;height:20px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.practice-stat{padding:var(--spacing-md);background:var(--surface);border-radius:var(--radius-md);border:1px solid var(--border);flex-direction:column;align-items:center;display:flex}.practice-stat-value{color:var(--primary);font-size:1.5rem;font-weight:700}.practice-stat-label{color:var(--foreground-muted);font-size:.8rem}.shortcut-hint{align-items:center;gap:var(--spacing-xs);color:var(--foreground-subtle);font-size:.75rem;display:inline-flex}.shortcut-key{background:var(--surface-elevated);border-radius:var(--radius-sm);border:1px solid var(--border);font-family:var(--font-mono);padding:2px 6px}.section-header{margin-bottom:var(--spacing-lg);justify-content:space-between;align-items:center;gap:var(--spacing-md);flex-wrap:wrap;display:flex}@media (max-width:768px){.section-header{flex-direction:column;align-items:stretch}}.hero{text-align:center;padding:var(--spacing-2xl)0}.hero-title{margin-bottom:1rem;font-size:3.5rem}@media (max-width:768px){.hero{padding:var(--spacing-xl)0}.hero-title{font-size:2rem}}.hero-subtitle{color:var(--foreground-muted);max-width:600px;margin:0 auto;font-size:1.2rem}@media (max-width:768px){.hero-subtitle{font-size:1rem}}.text-primary{color:var(--primary)}.text-secondary{color:var(--secondary)}.text-muted{color:var(--foreground-muted)}.text-subtle{color:var(--foreground-subtle)}.confirm-dialog{text-align:center}.confirm-dialog-title{margin-bottom:var(--spacing-md);font-size:1.25rem}.confirm-dialog-message{color:var(--foreground-muted);margin-bottom:var(--spacing-lg)}.confirm-dialog-actions{gap:var(--spacing-md);justify-content:center;display:flex}.recently-viewed{gap:var(--spacing-md);padding-bottom:var(--spacing-sm);-webkit-overflow-scrolling:touch;display:flex;overflow-x:auto}.recently-viewed-item{flex:none;min-width:200px}.game-mode-wrapper{background:var(--surface);border-radius:var(--radius-lg);border:1px solid var(--border);flex-direction:column;min-height:400px;display:flex;overflow:hidden}.game-mode-header{padding:var(--spacing-md)var(--spacing-lg);background:var(--surface-elevated);border-bottom:1px solid var(--border);align-items:center;gap:var(--spacing-lg);flex-shrink:0;display:flex}.game-mode-controls{align-items:center;gap:var(--spacing-md);display:flex}.game-mode-btn{min-width:80px}.game-mode-tempo{font-family:var(--font-mono);color:var(--foreground-muted);font-size:.9rem}.game-mode-progress{border-radius:var(--radius-full);background:#ffffff1a;flex:1;height:8px;overflow:hidden}.game-mode-progress-bar{background:var(--primary);will-change:width;height:100%}.game-mode-beat-display{font-family:var(--font-mono);color:var(--foreground-muted);white-space:nowrap;font-size:.85rem}.game-mode-chords-bar{align-items:center;gap:var(--spacing-md);padding:var(--spacing-sm)var(--spacing-lg);background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0;display:flex;overflow-x:auto}.game-mode-chords-label{color:var(--foreground-muted);flex-shrink:0;font-size:.85rem}.game-mode-chords-list{gap:var(--spacing-sm);flex-wrap:wrap;display:flex}.game-mode-chord-badge{font-family:var(--font-mono);color:var(--primary);border-radius:var(--radius-sm);background:#bb86fc26;padding:4px 10px;font-size:.9rem;font-weight:600}.game-mode-viewport{background:linear-gradient(180deg,var(--surface)0%,var(--background)50%,var(--surface)100%);flex:1;min-height:250px;position:relative;overflow:hidden}.game-mode-play-line{background:var(--primary);z-index:10;width:4px;box-shadow:0 0 20px var(--primary),0 0 40px var(--primary),0 0 60px #bb86fc80;position:absolute;top:0;bottom:0}.game-mode-play-line:before{content:"";background:linear-gradient(90deg,#0000,#bb86fc26,#0000);width:60px;position:absolute;top:0;bottom:0;left:-30px}.game-mode-content{will-change:transform;position:absolute;top:0;bottom:0}.game-mode-track{align-items:center;height:50%;display:flex;position:absolute;left:0;right:0}.game-mode-chord-track{top:0}.game-mode-lyrics-track{bottom:0}.game-mode-center-line{background:var(--border);height:2px;position:absolute;top:50%;left:0;right:0;transform:translateY(-50%)}.game-mode-item{box-sizing:border-box;align-items:center;height:100%;display:flex;position:absolute;overflow:visible}.game-mode-chord{font-family:var(--font-mono);color:var(--primary);text-shadow:0 2px 4px #0000004d;padding-left:var(--spacing-md);justify-content:center;font-size:2rem;font-weight:700}.game-mode-chord.empty{visibility:hidden}.game-mode-chord.section{color:var(--foreground-muted);text-shadow:none;font-size:1.1rem;font-weight:400}.game-mode-chord.active{color:var(--secondary);text-shadow:0 0 10px var(--secondary),0 0 20px var(--secondary),0 2px 4px #0000004d;z-index:5;transform:scale(1.15)}.game-mode-chord.active.empty{visibility:hidden;transform:none}.game-mode-lyrics{color:var(--foreground-muted);white-space:nowrap;text-align:left;padding-left:var(--spacing-md);font-size:1.25rem;overflow:visible}.game-mode-lyrics.active{color:var(--foreground);font-weight:600}.game-mode-lyrics.section{color:var(--primary);text-transform:uppercase;letter-spacing:.05em;font-size:1.1rem;font-weight:700}.game-mode-countdown{z-index:100;border:3px solid var(--primary);width:150px;height:150px;box-shadow:0 0 30px var(--primary);background:#000000e6;border-radius:50%;justify-content:center;align-items:center;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.game-mode-countdown-number{color:var(--primary);font-size:5rem;font-weight:700;animation:.5s ease-out countdown-pulse}@keyframes countdown-pulse{0%{opacity:0;transform:scale(1.5)}50%{opacity:1}to{opacity:1;transform:scale(1)}}.game-mode-loading{padding:var(--spacing-2xl);text-align:center;color:var(--foreground-muted)}.view-mode-toggle{background:var(--surface);border-radius:var(--radius-full);border:1px solid var(--border);padding:3px;display:inline-flex}.view-mode-btn{color:var(--foreground-muted);cursor:pointer;border-radius:var(--radius-full);transition:all var(--transition-fast);background:0 0;border:none;padding:6px 14px;font-size:.85rem}.view-mode-btn:hover{color:var(--foreground)}.view-mode-btn.active{background:var(--primary);color:#000;font-weight:600}[data-theme=light] h1{-webkit-text-fill-color:transparent;background:linear-gradient(90deg,#1a1a1a,#555);-webkit-background-clip:text;background-clip:text}[data-theme=light] .navbar{border-bottom:1px solid var(--border);background-color:#ffffffe6}[data-theme=light] .dropdown-menu{background-color:var(--surface-elevated);border:1px solid var(--border);box-shadow:var(--shadow-lg)}[data-theme=light] .dropdown-item:hover{background-color:var(--surface-hover)}[data-theme=light] .card{box-shadow:var(--shadow-sm)}[data-theme=light] .card:hover{box-shadow:var(--shadow-md)}[data-theme=light] .btn-secondary{background-color:var(--surface);border:1px solid var(--border)}[data-theme=light] .btn-secondary:hover{background-color:var(--surface-hover)}[data-theme=light] .controls-panel{border-top:1px solid var(--border);background-color:#fffffff2}[data-theme=light] .chord-tooltip-content{background-color:var(--surface-elevated);border:1px solid var(--border);box-shadow:var(--shadow-lg)}[data-theme=light] .modal-overlay{background-color:#00000080}[data-theme=light] .modal-content{background-color:var(--surface-elevated);box-shadow:var(--shadow-lg)}[data-theme=light] .game-mode-viewport{background:linear-gradient(180deg,var(--surface)0%,var(--background)50%,var(--surface)100%)}[data-theme=light] .game-mode-play-line{box-shadow:0 0 20px #7c3aed99,0 0 40px #7c3aed66}[data-theme=light] .game-mode-countdown{box-shadow:var(--shadow-lg);background:#fffffffa}[data-theme=light] .game-mode-progress{background:#0000001a}[data-theme=light] .game-mode-chord{text-shadow:0 2px 4px #0000001a}[data-theme=light] .game-mode-chord.active{text-shadow:0 0 10px var(--secondary),0 0 20px #0891b280}[data-theme=light] .game-mode-chord-badge{background:#7c3aed1a}[data-theme=light] .tuner-gauge{background:var(--surface);border:1px solid var(--border)}[data-theme=light] .toast{box-shadow:var(--shadow-lg)}[data-theme=light] .chord-drawer{background-color:var(--surface-elevated);border-left:1px solid 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(max-width:768px){.stats-row{grid-template-columns:repeat(2,1fr)}.tracks-grid{grid-template-columns:1fr}.skills-grid{grid-template-columns:repeat(2,1fr)}}.progress-ring-container{justify-content:center;align-items:center;display:flex;position:relative}.progress-ring-content{justify-content:center;align-items:center;display:flex;position:absolute}.next-steps-card{background:linear-gradient(135deg,var(--surface),var(--surface-elevated));border:1px solid var(--border);color:var(--foreground);border-radius:12px;align-items:center;gap:20px;padding:20px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex}.next-steps-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.next-steps-icon{flex-shrink:0;font-size:2.5rem}.next-steps-content{flex:1}.next-steps-label{color:var(--foreground-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;font-size:.8rem}.next-steps-title{margin-bottom:4px;font-size:1.2rem;font-weight:600}.next-steps-meta{color:var(--foreground-muted);font-size:.9rem}.next-steps-arrow{color:var(--primary);font-size:1.5rem}.track-page{max-width:900px;margin:0 auto}.track-page-header{border-bottom:1px solid var(--border);align-items:flex-start;gap:20px;margin-bottom:32px;padding-bottom:24px;display:flex}.track-page-icon{font-size:3rem}.track-page-info{flex:1}.track-page-info h1{margin-bottom:8px;font-size:2rem}.track-page-description{color:var(--foreground-muted);line-height:1.5}.track-page-meta{color:var(--foreground-muted);gap:16px;margin-top:12px;font-size:.9rem;display:flex}.modules-list{flex-direction:column;gap:16px;display:flex}.module-card{background:var(--surface);border:1px solid 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32px;font-weight:600}.xp-earned{margin-top:8px;font-size:1.2rem;font-weight:600}.exercise-info{background:var(--surface-elevated);border-radius:8px;flex-wrap:wrap;gap:24px;padding:16px;display:flex}.info-item{flex-direction:column;gap:4px;display:flex}.info-item .label{color:var(--foreground-muted);text-transform:uppercase;letter-spacing:.5px;font-size:.8rem}.info-item .value{color:var(--primary);font-weight:600}.hints{background:var(--surface-elevated);border-radius:8px;padding:16px}.hints h4{color:var(--foreground-muted);margin:0 0 8px;font-size:.9rem}.hints ul{margin:0;padding-left:20px}.hints li{margin:4px 0}.exercise-instructions{background:var(--surface-elevated);border-radius:8px;padding:16px}.exercise-instructions h4{color:var(--foreground-muted);margin:0 0 8px;font-size:.9rem}.exercise-instructions p{margin:0;line-height:1.6}.exercise-actions,.practice-actions,.content-actions,.player-actions{border-top:1px solid 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button:disabled{opacity:.5;cursor:not-allowed}.chord-display{background:var(--surface-elevated);border-radius:12px;flex-direction:column;align-items:center;gap:16px;padding:24px;display:flex}.chord-name{color:var(--primary);margin:0;font-size:2rem}.chord-diagram{margin:16px 0}.play-btn{background:var(--primary);color:#000;cursor:pointer;border:none;border-radius:8px;padding:10px 24px;font-weight:600;transition:opacity .2s}.play-btn:hover{opacity:.9}.chord-info{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;display:grid}.info-section{background:var(--surface-elevated);border-radius:8px;padding:16px}.info-section h5{text-transform:uppercase;letter-spacing:.5px;color:var(--foreground-muted);margin:0 0 12px;font-size:.9rem}.info-section.mistakes h5{color:#f44336}.info-section ul{margin:0;padding-left:20px}.info-section li{margin:6px 0;font-size:.95rem}.related-chords{flex-wrap:wrap;gap:8px;display:flex}.related-chord{background:var(--surface);border-radius:4px;padding:4px 12px;font-size:.9rem}.backing-track-player{flex-direction:column;gap:20px;display:flex}.player-title{margin:0;font-size:1.2rem}.player-description{color:var(--foreground-muted);margin:0}.track-info{color:var(--foreground-muted);flex-wrap:wrap;gap:16px;font-size:.9rem;display:flex}.player-display{background:var(--surface-elevated);text-align:center;border-radius:12px;padding:24px}.current-chord{margin-bottom:20px}.chord-label{color:var(--foreground-muted);margin-bottom:4px;font-size:.85rem;display:block}.controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;display:flex}.tempo-control{align-items:center;gap:8px;display:flex}.tempo-control button{background:var(--surface-elevated);border:1px solid var(--border);cursor:pointer;color:var(--foreground);border-radius:4px;padding:6px 12px}.tempo-display{text-align:center;min-width:80px;font-weight:600}.playback-controls{gap:8px;display:flex}.reset-btn{cursor:pointer;border:1px solid var(--border);background:var(--surface-elevated);color:var(--foreground);border-radius:8px;padding:10px 20px;font-weight:600}.loop-control{align-items:center;gap:8px;display:flex}.loop-control label{align-items:center;gap:4px;display:flex}.loop-control select{background:var(--surface-elevated);border:1px solid var(--border);color:var(--foreground);border-radius:4px;padding:4px 8px}.chord-progression{background:var(--surface-elevated);border-radius:8px;padding:16px}.chord-progression h4{color:var(--foreground-muted);margin:0 0 12px;font-size:.9rem}.chords-display{flex-wrap:wrap;gap:8px;display:flex}.chord-item{background:var(--surface);border-radius:6px;padding:8px 16px;font-weight:500;transition:all .2s}.chord-item.active{background:var(--primary);color:#000;transform:scale(1.1)}.lesson-viewer{flex-direction:column;gap:24px;display:flex}.lesson-progress{background:var(--surface);border:1px solid var(--border);border-radius:8px;align-items:center;gap:16px;padding:16px;display:flex}.lesson-progress-bar{background:var(--border);border-radius:4px;flex:1;height:8px;overflow:hidden}.lesson-progress-fill{background:var(--primary);height:100%;transition:width .3s}.lesson-progress-text{color:var(--foreground-muted);white-space:nowrap;font-size:.9rem}[data-theme=light] .track-card:hover:not(.locked),[data-theme=light] .next-steps-card:hover{box-shadow:0 4px 12px #0000001a}[data-theme=light] .result-card.passed{box-shadow:0 4px 12px #4caf504d}[data-theme=light] .streak-display{box-shadow:0 2px 8px #ff6b354d}