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

:root {
    /* 亮色模式 */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --sidebar-bg: #1e1e2f;
    --sidebar-color: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent-color: #5e72e4;
    --hover-color: #485fe0;
    --border-color: #e0e0e0;
    --player-bg: #ffffff;
    --song-row-hover: #f0f0f0;
    --song-row-active: #eaeaff;
}

/* 暗色模式 */
.dark-mode {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --sidebar-bg: #0f0f1e;
    --sidebar-color: #ffffff;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-color: #5e72e4;
    --hover-color: #485fe0;
    --border-color: #333333;
    --player-bg: #181818;
    --song-row-hover: #2a2a2a;
    --song-row-active: #2d2d45;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100%;
    overflow: hidden;
}

/* 侧边栏 */
.sidebar {
    width: 240px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-color);
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
}

.menu ul {
    list-style: none;
    margin-top: 20px;
}

.menu li {
    padding: 15px 20px;
    font-size: 16px;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.menu li i {
    margin-right: 12px;
    font-size: 18px;
}

.menu li:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.menu li.active {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--accent-color);
    font-weight: 600;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.page-content {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    background-color: var(--bg-secondary);
}

.page {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 600;
}

/* 搜索功能 */
.search-container {
    display: flex;
    margin-bottom: 30px;
    position: relative;
}

#search-input {
    flex: 1;
    padding: 12px 15px;
    font-size: 16px;
    border: none;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    outline: none;
    transition: box-shadow 0.3s;
}

#search-input:focus {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#search-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 48px;
    height: 48px;
    margin-left: 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#search-button:hover {
    background-color: var(--hover-color);
}

/* 歌曲列表头部 */
.songs-list-header {
    display: grid;
    grid-template-columns: 50px 3fr 2fr 100px 50px;
    padding: 0 20px 10px 20px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

/* 歌曲列表 */
.songs-container {
    display: flex;
    flex-direction: column;
}

.song-row {
    display: grid;
    grid-template-columns: 50px 3fr 2fr 100px 50px;
    padding: 12px 20px;
    border-radius: 6px;
    margin-bottom: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
    align-items: center;
}

.song-row:hover {
    background-color: var(--song-row-hover);
}

.song-row.active {
    background-color: var(--song-row-active);
    font-weight: 500;
}

.song-index {
    color: var(--text-secondary);
}

.song-title {
    display: flex;
    align-items: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-artist {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-duration {
    color: var(--text-secondary);
    text-align: center;
}

.song-action {
    display: flex;
    justify-content: center;
}

.favorite-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
}

.favorite-btn:hover {
    color: var(--accent-color);
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-mode .favorite-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.favorite-btn.favorite {
    color: #ff5252;
}

.song-row .favorite-btn {
    opacity: 0.5;
}

.song-row:hover .favorite-btn {
    opacity: 1;
}

/* 播放器 */
.player-container {
    height: 100px;
    background-color: var(--player-bg);
    border-top: 1px solid var(--border-color);
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.player-info {
    display: flex;
    align-items: center;
    width: 30%;
}

.album-cover {
    width: 60px;
    height: 60px;
    border-radius: 6px;
    overflow: hidden;
    margin-right: 15px;
    background-color: #f0f0f0;
}

.album-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.track-info {
    overflow: hidden;
}

.track-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.player-controls button {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    margin-left: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.player-controls button:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-mode .player-controls button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

#play-button {
    font-size: 24px;
    background-color: var(--accent-color);
    color: white;
}

#play-button:hover {
    background-color: var(--hover-color);
}

.player-progress {
    width: 40%;
    display: flex;
    align-items: center;
    gap: 10px;
}

.progress-time {
    font-size: 14px;
    color: var(--text-secondary);
    width: 45px;
    text-align: center;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.progress-bar-inner {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 2px;
    width: 0%;
}

.progress-handle {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
    pointer-events: none;
}

.player-volume {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 15%;
}

#volume-icon {
    font-size: 16px;
    color: var(--text-secondary);
    cursor: pointer;
}

.volume-bar {
    flex: 1;
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    cursor: pointer;
    position: relative;
}

.volume-bar-inner {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 2px;
    width: 80%;
}

.volume-handle {
    position: absolute;
    left: 80%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    border-radius: 50%;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
    pointer-events: none;
}

/* 上传按钮 */
.upload-button-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 15px;
}

.upload-button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 14px;
    display: flex;
    align-items: center;
}

.upload-button i {
    margin-right: 8px;
}

.upload-button:hover {
    background-color: var(--hover-color);
}

/* 设置页面 */
.settings-container {
    background-color: var(--bg-primary);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

/* 开关 */
.theme-switch {
    position: relative;
}

#theme-toggle {
    display: none;
}

.toggle-label {
    display: inline-block;
    width: 50px;
    height: 26px;
    background-color: #ccc;
    border-radius: 13px;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s;
}

#theme-toggle:checked + .toggle-label {
    background-color: var(--accent-color);
}

.toggle-inner {
    position: absolute;
    left: 3px;
    top: 3px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

#theme-toggle:checked + .toggle-label .toggle-inner {
    transform: translateX(24px);
}

/* 响应式 */
@media (max-width: 900px) {
    .sidebar {
        width: 180px;
    }
    
    .songs-list-header,
    .song-row {
        grid-template-columns: 40px 2fr 1fr 80px 40px;
        padding-left: 10px;
        padding-right: 10px;
    }
    
    .player-container {
        flex-wrap: wrap;
        height: auto;
        padding: 15px;
    }
    
    .player-info {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .player-progress {
        width: 100%;
        order: 3;
        margin-top: 10px;
    }
    
    .player-controls {
        order: 2;
    }
    
    .player-volume {
        display: none;
    }
}

@media (max-width: 600px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        padding: 10px 0;
    }
    
    .menu ul {
        display: flex;
        margin-top: 10px;
        overflow-x: auto;
    }
    
    .menu li {
        padding: 10px 15px;
        white-space: nowrap;
    }
    
    .logo {
        padding: 0 15px 10px;
    }
    
    .page-content {
        padding: 15px;
    }
    
    h2 {
        font-size: 22px;
        margin-bottom: 20px;
    }
    
    .songs-list-header,
    .song-row {
        grid-template-columns: 30px 2fr 1fr 70px 40px;
        padding-left: 5px;
        padding-right: 5px;
        font-size: 14px;
    }
    
    .song-duration {
        font-size: 12px;
    }
}

/* 无歌曲显示 */
.no-songs {
    text-align: center;
    padding: 40px 0;
    color: var(--text-secondary);
    font-size: 16px;
}

.watermark {
    position: fixed;
    bottom: 0;
    right: 0;
    font-size: 8px;
    color: rgba(0, 0, 0, 0.1);
    z-index: -1;
}

.hidden-watermark {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 1px;
    overflow: hidden;
    pointer-events: none;
}