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

body {
    background-color: var(--text-primary);
    color: var(--text-secondary);
    min-height: 100vh;
    overflow: hidden;
    padding: 15px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 30px);
    gap: 12px;
}

.main-content {
    display: flex;
    flex: 1;
    gap: 15px;
    overflow: hidden;
}

.music-list-container {
    flex: 0 0 380px;
    background-color: var(--bg-primary);
    border-radius: 15px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px var(--shadow-color);
    backdrop-filter: blur(10px);
    max-height: 100%;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.music-list-container h2 {
    margin-bottom: 12px;
    color: var(--accent-color);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.music-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 5px;
}

.music-list::-webkit-scrollbar {
    width: 6px;
}

.music-list::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 3px;
}

.music-list::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 3px;
}

.music-item {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.music-item:hover {
    background-color: var(--accent-hover);
}

.music-item.active {
    background-color: var(--accent-light);
    border-left: 4px solid var(--accent-color);
}

.music-cover-small {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
}

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

.music-title {
    font-weight: 600;
    margin-bottom: 3px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-artist {
    font-size: 0.82rem;
    color: var(--text-secondary);
    opacity: 0.7;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-duration {
    font-size: 0.78rem;
    color: var(--accent-color);
    flex-shrink: 0;
    margin-left: auto;
}

.right-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow: hidden;
}

.album-section {
    flex: 0 0 230px;
    background-color: var(--bg-primary);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px var(--shadow-color);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.album-cover-container {
    position: relative;
    width: 170px;
    height: 170px;
    margin-bottom: 20px;
}

.album-cover {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 8px solid var(--album-border);
    transition: transform 0.1s linear;
}

.album-cover.playing {
    animation-play-state: running;
}

.album-cover.paused {
    animation-play-state: paused;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.album-info {
    text-align: center;
    width: 100%;
}

.now-playing-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.now-playing-artist {
    font-size: 1rem;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.album-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.lyrics-section {
    flex: 1;
    background-color: var(--bg-primary);
    border-radius: 15px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px var(--shadow-color);
    backdrop-filter: blur(10px);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.lyrics-container {
    flex: 1;
    overflow: hidden;
    position: relative;
    margin-top: 0;
    margin-bottom: 0;
}

.lyrics-wrapper {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    padding-top: 0;
    padding-bottom: 0;
}

.lyric-line {
    padding: 12px 0;
    font-size: 0.95rem;
    line-height: 2.0;
    text-align: center;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    height: 10%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lyric-line.active {
    color: var(--accent-color);
    opacity: 1;
    font-size: 1.1rem;
    font-weight: 600;
}

.player-controls {
    background-color: var(--bg-primary);
    border-radius: 15px;
    padding: 12px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 10px 30px var(--shadow-color);
    backdrop-filter: blur(10px);
    flex-shrink: 0;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.progress-container {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background-color: var(--progress-bg);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.progress {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s linear;
}

.progress-time {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
    margin-top: 4px;
}

.controls-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.time-display {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 100px;
}

.playback-controls {
    display: flex;
    align-items: center;
    gap: 18px;
}

.control-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.control-btn:hover {
    background-color: var(--accent-hover);
    color: var(--accent-color);
}

.play-pause-btn {
    background-color: var(--accent-color);
    color: var(--text-primary);
    font-size: 1.3rem;
}

.play-pause-btn:hover {
    background-color: var(--accent-color);
    opacity: 0.9;
    color: var(--text-primary);
}

.right-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 200px;
    justify-content: flex-end;
    position: relative;
}

.volume-container {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100px;
}

.volume-container i {
    color: var(--text-secondary);
}

.volume-slider {
    width: 65px;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--progress-bg);
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
}

.loop-btn, .speed-btn, .theme-btn {
    background: var(--button-bg);
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    position: relative;
}

.loop-btn:hover, .speed-btn:hover, .theme-btn:hover {
    background-color: var(--accent-hover);
    color: var(--accent-color);
}

.loop-btn.active, .speed-btn.active {
    background-color: var(--accent-light);
    color: var(--accent-color);
}

.speed-selector {
    position: absolute;
    top: -200px;
    right: 0;
    background-color: var(--bg-secondary);
    border-radius: 10px;
    padding: 8px 0;
    box-shadow: 0 5px 20px var(--shadow-color);
    z-index: 100;
    display: none;
    flex-direction: column;
    min-width: 90px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.speed-selector.show {
    display: flex;
}

.speed-option {
    padding: 10px 15px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    font-size: 0.9rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
}

.speed-option:hover {
    background-color: var(--accent-hover);
    color: var(--accent-color);
}

.speed-option.active {
    background-color: var(--accent-light);
    color: var(--accent-color);
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.2rem;
    cursor: pointer;
    margin-right: 10px;
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 100;
}

.music-list-close-btn {
    display: none;
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
}

.music-list-close-btn:hover {
    background-color: var(--accent-hover);
}

.light-theme {
    --text-primary: #f5f5f7;
    --text-secondary: #333333;
    --accent-color: #2a8bbd;
    --accent-light: rgba(42, 139, 189, 0.15);
    --accent-hover: rgba(42, 139, 189, 0.08);
    --bg-primary: rgba(245, 245, 247, 0.9);
    --bg-secondary: rgba(255, 255, 255, 0.95);
    --border-color: rgba(42, 139, 189, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --scrollbar-track: rgba(0, 0, 0, 0.05);
    --progress-bg: rgba(0, 0, 0, 0.1);
    --button-bg: rgba(0, 0, 0, 0.05);
    --album-border: rgba(0, 0, 0, 0.1);
}

.dark-theme {
    --text-primary: #1a1a2e;
    --text-secondary: #f1f1f1;
    --accent-color: #7bd3f7;
    --accent-light: rgba(123, 211, 247, 0.2);
    --accent-hover: rgba(123, 211, 247, 0.1);
    --bg-primary: rgba(30, 30, 46, 0.9);
    --bg-secondary: rgba(40, 40, 60, 0.95);
    --border-color: rgba(123, 211, 247, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --scrollbar-track: rgba(255, 255, 255, 0.1);
    --progress-bg: rgba(255, 255, 255, 0.1);
    --button-bg: rgba(255, 255, 255, 0.05);
    --album-border: rgba(0, 0, 0, 0.2);
}

@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
        position: relative;
    }
    
    .music-list-container {
        position: fixed;
        top: 0;
        left: -100%;
        width: 66.67%;
        height: 100%;
        z-index: 1000;
        transition: left 0.3s ease;
        border-radius: 0;
        padding-top: 60px;
        padding-left: 15px;
        padding-right: 15px;
        box-shadow: 5px 0 25px rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(15px);
    }
    
    .music-list-container.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-overlay.active {
        display: block;
    }
    
    .music-list-close-btn {
        display: flex;
    }
    
    .album-section {
        flex: 0 0 auto;
        height: auto;
        padding: 15px;
    }
    
    .album-cover-container {
        width: 150px;
        height: 150px;
    }
    
    .right-controls {
        min-width: auto;
    }
    
    .volume-container {
        width: 85px;
    }
    
    .speed-selector {
        top: -180px;
        right: -15px;
    }
    
    .lyrics-section {
        padding: 12px;
    }
    
    .player-controls {
        padding: 10px 15px;
    }
}

@media (max-width: 768px) {
    .container {
        height: calc(100vh - 20px);
        gap: 10px;
        padding: 10px;
    }
    
    .controls-main {
        flex-direction: column;
        gap: 10px;
    }
    
    .time-display {
        align-self: flex-start;
    }
    
    .right-controls {
        align-self: flex-end;
        min-width: 170px;
    }
    
    .playback-controls {
        order: 2;
        width: 100%;
        justify-content: center;
    }
    
    .player-controls {
        padding: 10px 12px;
    }
    
    .album-cover-container {
        width: 130px;
        height: 130px;
    }
    
    .now-playing-title {
        font-size: 1.2rem;
    }
    
    .now-playing-artist {
        font-size: 0.95rem;
    }
    
    .lyric-line {
        font-size: 0.9rem;
    }
    
    .lyric-line.active {
        font-size: 1rem;
    }
    
    .music-list-container {
        width: 80%;
    }
}

@media (max-width: 480px) {
    .music-list-container {
        width: 85%;
    }
    
    .album-cover-container {
        width: 120px;
        height: 120px;
    }
    
    .right-controls {
        gap: 10px;
        min-width: auto;
    }
    
    .volume-container {
        width: 70px;
    }
    
    .volume-slider {
        width: 50px;
    }
    
    .loop-btn, .speed-btn, .theme-btn {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    
    .speed-selector {
        top: -170px;
        min-width: 80px;
    }
    
    .speed-option {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
}