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p{color:var(--text-secondary);font-size:.875rem}.error-screen{background:var(--bg-primary);justify-content:center;align-items:center;height:100vh;padding:1.5rem;display:flex}.error-card{background:var(--bg-elevated);border-radius:var(--radius-xl);text-align:center;flex-direction:column;align-items:center;gap:1rem;max-width:400px;padding:2rem;display:flex}.error-card svg{color:var(--error)}.error-card h2{color:var(--text-primary);font-size:1.25rem}.error-card p{color:var(--text-secondary);font-size:.875rem}.mobile-menu-btn{z-index:1001;border-radius:var(--radius-lg);background:var(--bg-elevated);width:44px;height:44px;color:var(--text-primary);border:1px solid var(--border-subtle);justify-content:center;align-items:center;display:none;position:fixed;top:1rem;left:1rem}.mobile-menu-btn:hover{background:var(--bg-card)}.sidebar-overlay{z-index:998;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0009;display:none;position:fixed;inset:0}@media (width<=768px){.mobile-menu-btn{display:flex}.sidebar-overlay{display:block}}.main-content{min-width:0;margin-left:var(--sidebar-width);background:linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 300px);flex-direction:column;flex:1;display:flex}@media (width<=768px){.main-content{margin-left:0}}.app-header{height:var(--header-height);z-index:100;background:0 0;justify-content:space-between;align-items:center;padding:1rem 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2rem);flex:1;overflow-y:auto}.search-section{margin-bottom:1rem;padding:0 1.5rem}.search-loading{color:var(--text-secondary);align-items:center;gap:.75rem;padding:0 1.5rem;font-size:.875rem;display:flex}.tracks-section,.favorites-section{animation:fadeIn var(--transition-normal) ease-out}.loading-state{color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:1rem;padding:4rem 2rem;display:flex}.error-state{color:var(--error);flex-direction:column;justify-content:center;align-items:center;gap:1rem;padding:4rem 2rem;display:flex}.error-state svg{opacity:.7}.empty-state{text-align:center;color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:1rem;padding:4rem 2rem;display:flex}.empty-state svg{opacity:.5}.empty-state h3{color:var(--text-primary);font-size:1.125rem;font-weight:600}.empty-state p{color:var(--text-muted);max-width:300px;font-size:.875rem}:root{--bg-primary:#0a0a0a;--bg-secondary:#121212;--bg-elevated:#181818;--bg-highlight:#1a1a1a;--bg-card:#242424;--text-primary:#fff;--text-secondary:#b3b3b3;--text-muted:#6a6a6a;--accent:#1db954;--accent-hover:#1ed760;--accent-pressed:#169c46;--border-subtle:#282828;--border-strong:#3e3e3e;--error:#f15e6c;--success:#1db954;--warning:#f59e0b;--shadow-sm:0 2px 4px #0000004d;--shadow-md:0 4px 12px #0006;--shadow-lg:0 8px 24px #00000080;--sidebar-width:280px;--player-height:90px;--header-height:64px;--transition-fast:.15s ease;--transition-normal:.2s ease;--transition-slow:.3s ease;--radius-sm:4px;--radius-md:6px;--radius-lg:8px;--radius-xl:12px;--radius-full:9999px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;overflow:hidden}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;color:var(--text-primary);font-weight:700}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.125rem}p{color:var(--text-secondary)}button{cursor:pointer;transition:all var(--transition-fast);border:none;outline:none;font-family:inherit}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:disabled{opacity:.5;cursor:not-allowed}input{font-family:inherit;font-size:inherit;transition:all var(--transition-fast);border:none;outline:none}input:focus{outline:none}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--bg-card);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}.center{height:100vh;color:var(--text-secondary);justify-content:center;align-items:center;display:flex}.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}input[type=range]{appearance:none;cursor:pointer;background:0 0}input[type=range]::-webkit-slider-runnable-track{background:var(--bg-card);border-radius:var(--radius-full);height:4px}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--text-primary);opacity:0;width:12px;height:12px;transition:opacity 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ease-out}.animate-pulse{animation:2s ease-in-out infinite pulse}.loading-spinner{border:2px solid var(--bg-card);border-top-color:var(--accent);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}.error{color:var(--error);font-size:.875rem}.empty-message{color:var(--text-muted);text-align:center;padding:2rem;font-size:.875rem}.search-results-count{color:var(--text-muted);padding:.5rem 1.5rem;font-size:.875rem}