:root{--bg-primary: #0f0f1a;--bg-secondary: #1a1a2e;--bg-card: #16213e;--bg-input: #0f3460;--accent-primary: #e94560;--accent-secondary: #533483;--accent-gradient: linear-gradient(135deg, #e94560, #533483);--accent-gradient-hover: linear-gradient(135deg, #ff6b81, #6c5ce7);--text-primary: #eaeaea;--text-secondary: #a0a0b8;--text-muted: #6c6c8a;--border-color: rgba(255, 255, 255, .08);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 30px rgba(233, 69, 96, .15);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);height:100vh;overflow:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body:before{content:"";position:fixed;top:0;left:0;width:100%;height:100%;background:radial-gradient(ellipse at 20% 50%,rgba(83,52,131,.15) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(233,69,96,.1) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(15,52,96,.2) 0%,transparent 50%);pointer-events:none;z-index:0}#root{position:relative;z-index:1;height:100vh}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.login-container{text-align:center;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:60px 48px;box-shadow:var(--shadow-lg),var(--shadow-glow);max-width:420px;width:100%;animation:fadeInUp .6s ease-out}.login-icon{font-size:64px;margin-bottom:16px;animation:pulse 2s infinite}.login-container h1{font-size:2rem;font-weight:800;margin-bottom:8px;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-container p{color:var(--text-secondary);font-size:.95rem;margin-bottom:36px;line-height:1.5}.google-login-btn{display:inline-flex;align-items:center;gap:12px;padding:14px 32px;background:#fff;color:#333;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:600;font-family:Inter,sans-serif;cursor:pointer;transition:var(--transition);box-shadow:var(--shadow-sm)}.google-login-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.google-login-btn:active{transform:translateY(0)}.google-login-btn svg{width:20px;height:20px}.app-container{max-width:640px;margin:0 auto;padding:24px 20px;height:100vh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border-color)}.header-left{display:flex;align-items:center;gap:14px}.header-icon{font-size:32px}.header-left h1{font-size:1.5rem;font-weight:700;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-right{display:flex;align-items:center;gap:12px}.user-avatar{width:36px;height:36px;border-radius:50%;border:2px solid var(--accent-primary);object-fit:cover}.logout-btn{padding:8px 16px;background:transparent;color:var(--text-secondary);border:1px solid var(--border-color);border-radius:var(--radius-sm);font-size:.85rem;font-family:Inter,sans-serif;cursor:pointer;transition:var(--transition)}.logout-btn:hover{color:var(--accent-primary);border-color:var(--accent-primary);background:#e9456014}.tabs-container{display:flex;gap:4px;background:var(--bg-secondary);border-radius:var(--radius-md);padding:4px;margin-bottom:28px;border:1px solid var(--border-color)}.tab-btn{flex:1;padding:12px 20px;background:transparent;color:var(--text-secondary);border:none;border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;font-family:Inter,sans-serif;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px}.tab-btn:hover{color:var(--text-primary);background:#ffffff0d}.tab-btn.active{background:var(--accent-gradient);color:#fff;box-shadow:var(--shadow-sm)}.save-tab{animation:fadeIn .3s ease-out;flex:1;display:flex;flex-direction:column;min-height:0;overflow-y:auto}.form-card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-md)}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}.form-group label .required{color:var(--accent-primary);margin-left:4px}.form-group label .optional{color:var(--text-muted);font-weight:400;text-transform:none;font-size:.8rem}.form-input{width:100%;padding:14px 16px;background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem;font-family:Inter,sans-serif;transition:var(--transition);outline:none}.form-input::placeholder{color:var(--text-muted)}.form-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #e9456026}.save-btn{width:100%;padding:16px;background:var(--accent-gradient);color:#fff;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:700;font-family:Inter,sans-serif;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px;margin-top:28px;text-transform:uppercase;letter-spacing:.5px}.save-btn:hover:not(:disabled){background:var(--accent-gradient-hover);transform:translateY(-2px);box-shadow:var(--shadow-md),var(--shadow-glow)}.save-btn:active:not(:disabled){transform:translateY(0)}.save-btn:disabled{opacity:.5;cursor:not-allowed}.toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%) translateY(100px);background:var(--bg-card);color:var(--text-primary);padding:14px 28px;border-radius:var(--radius-md);font-size:.95rem;font-weight:500;box-shadow:var(--shadow-lg);border:1px solid var(--border-color);z-index:1000;opacity:0;transition:all .4s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;gap:8px}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.listen-tab{animation:fadeIn .3s ease-out;flex:1;display:flex;flex-direction:column;min-height:0}.playlist-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:16px;flex-wrap:wrap}.playlist-header-left{display:flex;align-items:center;gap:12px}.playlist-controls{display:flex;gap:10px}.control-btn{padding:8px 16px;border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:6px}.control-btn:hover{border-color:var(--accent-primary);background:#e945601a}.control-btn.shuffle{background:var(--accent-gradient);border:none;color:#fff}.control-btn.shuffle:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.play-btn.playing{color:#2ecc71;opacity:1}.playlist-list{display:flex;flex-direction:column;gap:8px;overflow-y:auto;flex:1;min-height:0;padding-right:4px}.playlist-list::-webkit-scrollbar{width:6px}.playlist-list::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:4px}.playlist-list::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}.playlist-list::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.song-card{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);animation:fadeInUp .4s ease-out backwards}.song-card:hover{border-color:#e945604d;background:var(--bg-card);transform:translate(4px)}.song-index{min-width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:#ffffff0d;border-radius:var(--radius-sm);font-size:.85rem;font-weight:700;color:var(--text-muted)}.song-card:hover .song-index{background:var(--accent-gradient);color:#fff}.song-info{flex:1;min-width:0}.song-name{font-size:1rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.song-artist{font-size:.85rem;color:var(--text-muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.song-actions{display:flex;gap:8px;align-items:center}.play-btn,.delete-btn{background:transparent;border:none;font-size:20px;cursor:pointer;opacity:0;transition:var(--transition);padding:6px;border-radius:50%;display:flex;align-items:center;justify-content:center}.play-btn:hover{background:#2ecc7133;transform:scale(1.1)}.delete-btn:hover{background:#e9456033;transform:scale(1.1)}.song-card:hover .play-btn,.song-card:hover .delete-btn{opacity:1}.music-player-card{margin-bottom:24px;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-lg),var(--shadow-glow);animation:fadeInUp .5s ease-out}.player-main{display:flex;align-items:center;gap:20px;margin-bottom:16px}.player-art{width:60px;height:60px;background:var(--accent-gradient);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 4px 15px #e945604d;transition:transform .3s ease}.player-art.playing{animation:rotate 4s linear infinite}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.player-info{flex:1;min-width:0}.player-song-name{font-size:1.1rem;font-weight:700;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:4px}.player-artist-name{font-size:.9rem;color:var(--text-secondary)}.player-controls-main{display:flex;align-items:center;gap:12px}.play-control-btn{background:transparent;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}.play-control-btn:disabled{opacity:.3;cursor:not-allowed}.play-control-btn.primary{width:48px;height:48px;background:var(--text-primary);border-radius:50%;font-size:20px}.play-control-btn.primary:hover:not(:disabled){transform:scale(1.1);background:#fff}.play-control-btn.secondary{font-size:24px;color:var(--text-secondary)}.play-control-btn.secondary:hover:not(:disabled){color:var(--text-primary)}.player-progress-container{padding:4px 0}.progress-bar-bg{height:6px;background:var(--bg-input);border-radius:3px;cursor:pointer;position:relative;overflow:hidden}.progress-fill{height:100%;background:var(--accent-gradient);width:0%;transition:width .1s linear}.empty-state{text-align:center;padding:60px 20px;animation:fadeIn .4s ease-out}.empty-state-icon{font-size:64px;margin-bottom:16px;opacity:.6}.empty-state h3{font-size:1.2rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.empty-state p{color:var(--text-muted);font-size:.9rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;gap:16px}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}.loading-container p{color:var(--text-secondary);font-size:.9rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:480px){.app-container{padding:16px 14px 32px}.login-container{padding:40px 28px}.login-container h1{font-size:1.6rem}.form-card{padding:24px 20px}.header-left h1{font-size:1.2rem}.song-card{padding:14px 16px;gap:12px}}