* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    /* Dynamic Animated Background */
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #ffffff;
}

/* Background Animation Keyframes */
@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.music-player {
    /* Glassmorphism Effect */
    background: rgba(20, 20, 20, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    
    width: 380px;
    padding: 30px;
    border-radius: 20px;
}

.artwork-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

#cover-image {
    width: 220px;
    height: 220px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
    background-color: rgba(255,255,255,0.1); /* Fallback for empty src */
}

.player-info {
    text-align: center;
    margin-bottom: 25px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

#song-title {
    font-size: 1.4rem;
    margin-bottom: 5px;
    color: #ffffff;
    font-weight: 600;
}

#song-artist {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.progress-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
}

#progress-bar {
    flex: 1;
    margin: 0 10px;
    cursor: pointer;
    accent-color: #ffffff;
}

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 25px;
    margin-bottom: 20px;
}

.control-btn {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.8rem;
    cursor: pointer;
    transition: transform 0.2s, text-shadow 0.2s;
}

.control-btn:hover {
    transform: scale(1.1);
    text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

.play-pause {
    font-size: 3rem;
}

.volume-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    font-size: 1.2rem;
}

#volume-bar {
    width: 60%;
    cursor: pointer;
    accent-color: #ffffff;
}

.playlist-section h3 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

#playlist {
    list-style: none;
    max-height: 140px;
    overflow-y: auto;
    padding-right: 5px;
}

#playlist::-webkit-scrollbar {
    width: 6px;
}

#playlist::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
}

.playlist-item {
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    transition: background 0.2s, transform 0.1s;
    margin-bottom: 5px;
    background: rgba(255, 255, 255, 0.05);
}

.playlist-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.playlist-item.active {
    background-color: rgba(255, 255, 255, 0.25);
    border-left: 4px solid #ffffff;
}

.playlist-item .song-details {
    display: flex;
    flex-direction: column;
}

.playlist-item .song-details strong {
    font-size: 0.95rem;
    color: #ffffff;
}

.playlist-item .song-details span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}