*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #6366f1;--color-primary-dark: #4f46e5;--color-primary-light: #818cf8;--color-secondary: #ec4899;--color-success: #10b981;--color-warning: #f59e0b;--color-error: #ef4444;--color-background: #ffffff;--color-surface: #f9fafb;--color-surface-hover: #f3f4f6;--color-text: #111827;--color-text-secondary: #6b7280;--color-border: #e5e7eb;--color-shadow: rgba(0, 0, 0, .1);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--border-radius-sm: .25rem;--border-radius-md: .5rem;--border-radius-lg: 1rem;--border-radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease;--shadow-sm: 0 1px 2px 0 var(--color-shadow);--shadow-md: 0 4px 6px -1px var(--color-shadow);--shadow-lg: 0 10px 15px -3px var(--color-shadow);--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--max-width: 1200px;--header-height: 60px;--player-height: 100px}@media(prefers-color-scheme:dark){:root{--color-background: #111827;--color-surface: #1f2937;--color-surface-hover: #374151;--color-text: #f9fafb;--color-text-secondary: #9ca3af;--color-border: #374151;--color-shadow: rgba(0, 0, 0, .3)}}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);font-size:var(--font-size-base);line-height:1.5;color:var(--color-text);background-color:var(--color-background);min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-2xl)}h3{font-size:var(--font-size-xl)}h4{font-size:var(--font-size-lg)}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-surface)}::-webkit-scrollbar-thumb{background:var(--color-text-secondary);border-radius:var(--border-radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-text)}jukebox-app{display:block;min-height:100vh}.container{max-width:var(--max-width);margin:0 auto;padding:var(--spacing-md)}@media(min-width:1024px){.app-grid{display:grid;grid-template-columns:1fr 400px;gap:var(--spacing-xl);align-items:start}}.app-header{padding:var(--spacing-lg);background:var(--color-primary);color:#fff;margin-bottom:var(--spacing-xl)}.app-header h1{text-align:center;font-size:var(--font-size-2xl);font-weight:700}.section{background:var(--color-surface);border-radius:var(--border-radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-lg);box-shadow:var(--shadow-sm)}.section-title{font-size:var(--font-size-lg);font-weight:600;margin-bottom:var(--spacing-md);color:var(--color-text)}.loading-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--color-text-secondary)}.empty-state-icon{font-size:var(--font-size-3xl);margin-bottom:var(--spacing-md)}.error-message{background:#fee2e2;color:#991b1b;padding:var(--spacing-md);border-radius:var(--border-radius-md);margin-bottom:var(--spacing-md);border:1px solid #fecaca}@media(prefers-color-scheme:dark){.error-message{background:#7f1d1d;color:#fecaca;border-color:#991b1b}}@media(max-width:640px){.container{padding:var(--spacing-sm)}.section,.app-header{padding:var(--spacing-md)}.app-header h1{font-size:var(--font-size-xl)}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-base);font-weight:500;border:none;border-radius:var(--border-radius-md);cursor:pointer;transition:all var(--transition-base);min-height:44px;min-width:44px}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark)}.btn-secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover:not(:disabled){background:var(--color-surface-hover)}.btn-icon{padding:var(--spacing-sm);border-radius:var(--border-radius-full)}.btn-sm{padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-sm);min-height:36px;min-width:36px}.input{width:100%;padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-base);border:1px solid var(--color-border);border-radius:var(--border-radius-md);background:var(--color-background);color:var(--color-text);transition:border-color var(--transition-base);min-height:44px}.input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #6366f11a}.input::placeholder{color:var(--color-text-secondary)}.form-group{margin-bottom:var(--spacing-md)}.form-label{display:block;font-size:var(--font-size-sm);font-weight:500;margin-bottom:var(--spacing-xs);color:var(--color-text)}.list{list-style:none;padding:0;margin:0}.list-item{padding:var(--spacing-sm) var(--spacing-md);border-bottom:1px solid var(--color-border);cursor:pointer;transition:background var(--transition-fast);min-height:44px;display:flex;align-items:center}.list-item:hover{background:var(--color-surface-hover)}.list-item:last-child{border-bottom:none}.list-item.active{background:var(--color-primary);color:#fff}.tabs{display:flex;gap:var(--spacing-sm);border-bottom:2px solid var(--color-border);margin-bottom:var(--spacing-md)}.tab{padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-base);font-weight:500;background:none;border:none;border-bottom:2px solid transparent;cursor:pointer;color:var(--color-text-secondary);transition:all var(--transition-base);margin-bottom:-2px;min-height:44px}.tab:hover{color:var(--color-text)}.tab.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.range{width:100%;height:6px;border-radius:var(--border-radius-full);background:var(--color-border);outline:none;-webkit-appearance:none;appearance:none;cursor:pointer}.range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--color-primary);cursor:pointer;transition:transform var(--transition-fast)}.range::-webkit-slider-thumb:hover{transform:scale(1.2)}.range::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--color-primary);cursor:pointer;border:none;transition:transform var(--transition-fast)}.range::-moz-range-thumb:hover{transform:scale(1.2)}.spinner{width:48px;height:48px;border:4px solid var(--color-surface);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-xs);font-weight:500;border-radius:var(--border-radius-full);background:var(--color-primary);color:#fff}.dropdown{position:relative;display:inline-block}.dropdown-menu{position:absolute;top:100%;left:0;min-width:200px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--border-radius-md);box-shadow:var(--shadow-lg);margin-top:var(--spacing-xs);z-index:100;max-height:300px;overflow-y:auto}.dropdown-item{padding:var(--spacing-sm) var(--spacing-md);cursor:pointer;transition:background var(--transition-fast);min-height:44px;display:flex;align-items:center}.dropdown-item:hover{background:var(--color-surface-hover)}@media(max-width:640px){.btn{padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-sm)}.tabs{overflow-x:auto;-webkit-overflow-scrolling:touch}.tab{white-space:nowrap}}