* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Tahoma', sans-serif;
    background: #0a0a0a;
    color: #ddd;
}

/* ==================== PLAYER TOP ==================== */
.winamp-player {
    position: sticky;
    top: 0;
    background: linear-gradient(#2a2a2a, #1a1a1a);
    border-bottom: 4px solid #ff9900;
    padding: 10px 15px;
    z-index: 100;
    box-shadow: 0 3px 10px rgba(0,0,0,0.7);
}

.player-display {
    background: #000;
    border: 2px inset #555;
    padding: 8px 12px;
    margin-bottom: 8px;
    text-align: center;
    font-family: monospace;
    color: #00ff00;
}

#now-title { font-size: 16px; font-weight: bold; }

.player-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.control-btn {
    width: 52px;
    height: 48px;
    background: #333;
    color: #fff;
    border: 2px outset #777;
    font-size: 22px;
    cursor: pointer;
}

.control-btn:active {
    border-style: inset;
}

.play-btn {
    width: 65px;
    font-size: 26px;
}

/* Main Layout */
.main-container {
    display: flex;
    min-height: calc(100vh - 120px); /* Trừ chiều cao player */
}

.sidebar {
    width: 260px;
    background: #1f1f1f;
    border-right: 2px solid #444;
    padding: 10px;
}

.winamp-header {
    background: linear-gradient(#ff9900, #cc6600);
    color: black;
    padding: 6px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 10px;
}

.sidebar a {
    display: block;
    padding: 8px 12px;
    color: #ccc;
    text-decoration: none;
    border-bottom: 1px solid #333;
}

.sidebar a:hover, .sidebar a.active {
    background: #ff9900;
    color: black;
}

.main {
    flex: 1;
    padding: 20px;
    background: #121212;
}

.winamp-title {
    background: linear-gradient(#ff9900, #cc5500);
    color: black;
    padding: 10px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 20px;
}

.playlist .track {
    padding: 10px 15px;
    cursor: pointer;
    border-bottom: 1px solid #333;
}

.playlist .track:hover { background: #2a2a2a; }
.playlist .track.playing { 
    background: #ff990033; 
    color: #ffdd88; 
    font-weight: bold; 
}

.progress-bar {
    width: 100%;
    height: 12px;
    accent-color: #ff9900;
}

.volume-area {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

.volume-bar {
    width: 120px;
    accent-color: #ff9900;
}

/* Responsive nhỏ */
@media (max-width: 768px) {
    .volume-area { display: none; }
}