/* ========== 音乐播放器样式 ========== */

.music-player {
    position: fixed;
    bottom: -100px;
    left: 0;
    right: 0;
    height: 90px;
    background: var(--surface-2);
    backdrop-filter: blur(20px);
    border-top: var(--border-1);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    z-index: 9999;
    transition: bottom var(--transition-base);
    display: grid;
    grid-template-columns: 300px 1fr 200px;
    gap: var(--space-6);
    padding: var(--space-4) var(--space-6);
    align-items: center;
}

.music-player.show {
    bottom: 0;
}

/* 音轨信息 */
.player-track {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.track-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.track-cover {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    object-fit: cover;
    box-shadow: var(--shadow-md);
}

.track-details {
    flex: 1;
    min-width: 0;
}

.track-title {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.track-artist {
    font-size: var(--text-sm);
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 控制按钮 */
.player-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.control-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.control-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover {
    background: var(--surface-3);
    color: var(--text-primary);
}

.control-btn.active {
    color: var(--accent-primary);
}

.control-btn-primary {
    width: 44px;
    height: 44px;
    background: var(--accent-primary);
    color: white;
}

.control-btn-primary:hover {
    background: var(--accent-primary-hover);
    transform: scale(1.1);
}

/* 进度条 */
.progress-bar {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.progress-time {
    font-size: var(--text-xs);
    color: var(--text-muted);
    min-width: 40px;
}

.progress-track {
    flex: 1;
    height: 4px;
    background: var(--surface-3);
    border-radius: var(--radius-full);
    cursor: pointer;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    transition: width 0.1s linear;
}

.progress-handle {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: white;
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.progress-track:hover .progress-handle {
    opacity: 1;
}

/* 额外控制 */
.player-extras {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-2);
}

.playlist-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-primary);
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: var(--radius-full);
    min-width: 16px;
    text-align: center;
}

.control-btn {
    position: relative;
}

/* 音量控制 */
.volume-control {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    position: relative;
}

.volume-slider {
    width: 80px;
    height: 36px;
    display: flex;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.volume-control:hover .volume-slider {
    opacity: 1;
    pointer-events: auto;
}

.volume-track {
    width: 100%;
    height: 4px;
    background: var(--surface-3);
    border-radius: var(--radius-full);
    position: relative;
}

.volume-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-fast);
}

/* 播放列表面板 */
.playlist-panel {
    position: absolute;
    bottom: 100%;
    right: 0;
    width: 400px;
    max-height: 500px;
    background: var(--surface-2);
    border: var(--border-1);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    box-shadow: var(--shadow-2xl);
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.playlist-panel.show {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-6);
    border-bottom: var(--border-1);
}

.playlist-header h3 {
    margin: 0;
    font-size: var(--text-lg);
}

.btn-clear {
    background: transparent;
    border: none;
    color: var(--accent-danger);
    cursor: pointer;
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-clear:hover {
    background: rgba(239, 68, 68, 0.1);
}

.playlist-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2);
}

.playlist-empty {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-12);
}

.playlist-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-2);
}

.playlist-item:hover {
    background: var(--surface-3);
}

.playlist-item.active {
    background: var(--accent-primary);
    color: white;
}

.playlist-item.active .playlist-item-title,
.playlist-item.active .playlist-item-artist {
    color: white;
}

.playlist-item-info {
    flex: 1;
    min-width: 0;
}

.playlist-item-title {
    font-weight: var(--font-medium);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
    font-size: var(--text-sm);
}

.playlist-item-artist {
    font-size: var(--text-xs);
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.playlist-item-actions {
    display: flex;
    gap: var(--space-2);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.playlist-item:hover .playlist-item-actions {
    opacity: 1;
}

.btn-icon {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--surface-3);
    color: var(--text-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--accent-primary);
    color: white;
}

.playlist-item.active .btn-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* 响应式 */
@media (max-width: 968px) {
    .music-player {
        grid-template-columns: 1fr;
        height: auto;
        padding: var(--space-3);
        gap: var(--space-3);
    }

    .player-track {
        order: 1;
    }

    .player-controls {
        order: 2;
    }

    .player-extras {
        order: 3;
        justify-content: center;
    }

    .volume-slider {
        display: none;
    }

    .playlist-panel {
        width: 100%;
        right: 0;
        left: 0;
    }
}

/* 滚动条样式 */
.playlist-items::-webkit-scrollbar {
    width: 6px;
}

.playlist-items::-webkit-scrollbar-track {
    background: var(--surface-1);
}

.playlist-items::-webkit-scrollbar-thumb {
    background: var(--surface-4);
    border-radius: var(--radius-full);
}

.playlist-items::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}