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ease;display:flex;align-items:center;justify-content:center}.control-btn:hover{background:rgba(255,255,255,.3);transform:scale(1.1)}.play-btn{background:#4CAF50;width:50px;height:50px}.play-btn:hover{background:#45a049}.progress-container{flex:1;height:4px;background:rgba(255,255,255,.3);border-radius:2px;cursor:pointer;position:relative}.progress-bar{height:100%;background:#4CAF50;border-radius:2px;width:0%;transition:width .1s ease}.time-display{font-size:.9rem;opacity:.8;margin-top:.5rem}.track-info{margin-bottom:.5rem;text-align:center}.track-title{font-size:1rem;font-weight:500;margin-bottom:.2rem}.track-artist{font-size:.8rem;opacity:.7}.playlist{margin-top:.5rem;max-height:150px;overflow-y:auto;background:rgba(255,255,255,.05);border-radius:10px;padding:.5rem}.playlist-item{padding:.3rem .5rem;border-radius:5px;cursor:pointer;transition:background .3s ease;text-align:left;font-size:.9rem}.playlist-item:hover{background:rgba(255,255,255,.1)}.playlist-item.active{background:rgba(76,175,80,.3)}.fullscreen-btn{position:absolute;top:20px;right:20px;background:rgba(255,255,255,.1);border:none;border-radius:5px;padding:.5rem 1rem;color:#fff;cursor:pointer;z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease}.fullscreen-btn:hover{background:rgba(255,255,255,.2)}.fullscreen-btn.hidden{opacity:0;pointer-events:none}@media (max-width: 768px){.title{font-size:2rem}.music-player{min-width:90%;margin:1rem}}