/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90e2;
    --secondary-color: #357abd;
    --background-color: #ffffff;
    --text-color: #333333;
    --secondary-text: #666666;
    --border-color: #e0e0e0;
    --hover-color: #f5f5f5;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --btn-bg: #4a90e2;
    --btn-hover: #357abd;
    --btn-active: #2a5a8a;
}

/* 深色主题 */
body.dark-theme {
    --background-color: #1a1a1a;
    --text-color: #ffffff;
    --secondary-text: #cccccc;
    --border-color: #333333;
    --hover-color: #2a2a2a;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --btn-bg: #5a9ff2;
    --btn-hover: #4a8fd2;
    --btn-active: #3a7fc2;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 头部样式 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.title {
    font-size: 24px;
    font-weight: bold;
    color: var(--text-color);
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mode-toggle {
    background: var(--background-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.mode-toggle:hover {
    background: var(--hover-color);
    border-color: var(--secondary-text);
}

.mode-toggle.api-mode {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.mode-toggle.api-mode:hover {
    background: var(--btn-hover);
    border-color: var(--btn-hover);
}

.theme-toggle {
    background: var(--background-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.theme-icon {
    width: 22px;
    height: 22px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
}

.sun-icon {
    opacity: 1;
}

.moon-icon {
    opacity: 0;
}

body.dark-theme .sun-icon {
    opacity: 0;
}

body.dark-theme .moon-icon {
    opacity: 1;
}

/* 播放区域样式 */
.player-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.player-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.song-info {
    margin-bottom: 30px;
}

.song-title {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 10px;
}

.song-artist {
    font-size: 16px;
    color: var(--secondary-text);
}

.music-player {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--hover-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.music-player iframe {
    border-radius: 8px;
    max-width: 100%;
}

.music-player audio {
    border-radius: 8px;
    max-width: 100%;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* 深色主题下 audio 控件颜色适配 */
body.dark-theme .music-player audio::-webkit-media-controls-panel {
    background: var(--hover-color);
}

body.dark-theme .music-player audio::-webkit-media-controls-current-time-display,
body.dark-theme .music-player audio::-webkit-media-controls-time-remaining-display {
    color: var(--text-color);
}

/* 播放控制按钮 */
.player-controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.control-btn {
    background: var(--background-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--hover-color);
    border-color: var(--secondary-text);
    transform: scale(1.1);
}

.control-btn:active {
    background: var(--hover-color);
    transform: scale(0.95);
}

/* 歌单区域样式 */
.playlist-section {
    background: var(--hover-color);
    border-radius: 15px;
    margin-top: 20px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.playlist-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    user-select: none;
}

.playlist-header:hover {
    background: var(--background-color);
}

.playlist-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-color);
    margin: 0;
}

.playlist-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.playlist-toggle:hover {
    background: var(--primary-color);
    color: white;
}

.toggle-arrow {
    font-size: 20px;
    transition: transform 0.3s ease;
    display: block;
}

.playlist-section.collapsed .toggle-arrow {
    transform: rotate(180deg);
}

.playlist-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 0 20px 20px 20px;
    max-height: 500px;
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
}

.playlist-section.collapsed .playlist-container {
    max-height: 0;
    opacity: 0;
    padding: 0 20px;
}

.playlist-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: var(--background-color);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.playlist-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow);
}

.playlist-item.active {
    border-color: var(--primary-color);
    background: var(--hover-color);
}

.playlist-icon {
    font-size: 24px;
    margin-right: 15px;
}

.playlist-info {
    flex: 1;
}

.playlist-name {
    font-size: 16px;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 5px;
}

.playlist-description {
    font-size: 14px;
    color: var(--secondary-text);
}

.playlist-status {
    font-size: 20px;
    color: var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.playlist-item.active .playlist-status {
    opacity: 1;
}

/* 加载状态 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--primary-color);
    border-top: 4px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    color: white;
    margin-top: 20px;
    font-size: 16px;
}

/* 错误提示 */
.error-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #ff4444;
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow);
    transform: translateX(400px);
    transition: var(--transition);
    z-index: 1000;
}

.error-message.show {
    transform: translateX(0);
}

.error-icon {
    font-size: 20px;
}

.error-text {
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .title {
        font-size: 20px;
    }
    
    .song-title {
        font-size: 24px;
    }
    
    .player-section {
        padding: 30px 15px;
    }
    
    .music-player {
        padding: 15px;
    }
    
    .music-player iframe {
        width: 280px;
        height: 72px;
    }
    
    .playlist-header {
        padding: 15px;
    }
    
    .playlist-title {
        font-size: 16px;
    }
    
    .toggle-arrow {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 15px 0;
    }
    
    .title {
        font-size: 18px;
    }
    
    .theme-toggle {
        width: 35px;
        height: 35px;
        font-size: 18px;
    }
    
    .player-section {
        padding: 20px 10px;
    }
    
    .song-title {
        font-size: 20px;
    }
    
    .song-artist {
        font-size: 14px;
    }
    
    .music-player iframe {
        width: 250px;
        height: 65px;
    }
    
    .playlist-item {
        padding: 12px;
    }
    
    .playlist-icon {
        font-size: 20px;
        margin-right: 10px;
    }
    
    .playlist-name {
        font-size: 14px;
    }
    
    .playlist-description {
        font-size: 12px;
    }
}

/* 平板设备适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 700px;
        padding: 25px;
    }
    
    .player-container {
        max-width: 450px;
    }
    
    .music-player iframe {
        width: 350px;
        height: 90px;
    }
}

/* 桌面设备优化 */
@media (min-width: 1025px) {
    .container {
        max-width: 800px;
        padding: 30px;
    }
    
    .player-container {
        max-width: 500px;
    }
    
    .music-player iframe {
        width: 380px;
        height: 100px;
    }
}