/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6c5ce7;
    --primary-light: #a29bfe;
    --primary-dark: #5f3dc4;
    --secondary-color: #fd79a8;
    --text-color: #333;
    --text-light: #666;
    --background-color: #f8f9fa;
    --card-color: #fff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
header {
    background-color: var(--card-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-branding h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 700;
    margin: 0;
}

.site-branding a {
    text-decoration: none;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 桌面端导航 */
.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* 汉堡菜单按钮 - 默认隐藏 */
.menu-toggle {
    display: none;
    background: none;
    border: 2px solid transparent;
    border-radius: 6px;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    z-index: 101;
    transition: var(--transition);
}

.menu-toggle:hover {
    background-color: var(--primary-light);
    color: white;
    border-color: var(--primary-color);
}

.menu-toggle:active {
    transform: scale(0.95);
}

/* 主内容区域 */
main {
    flex: 1;
    width: 100%;
    margin-bottom: 100px; /* 为底部播放器留出空间 */
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.content-wrapper {
    display: flex;
    gap: 2rem;
}

/* 歌曲列表容器 - 变窄 */
.song-list-container {
    flex: 2; /* 占用2份空间 */
    min-width: 0;
}

/* 侧边栏 */
.sidebar {
    flex: 1; /* 占用1份空间 */
    min-width: 250px;
    max-width: 300px;
}

.sidebar-section {
    background-color: var(--card-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.sidebar-section h3 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.site-info p,
.recommendations p {
    margin: 0 0 0.75rem 0;
    color: var(--text-light);
    line-height: 1.6;
}

.artist-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.artist-list .loading {
    color: var(--text-light);
    font-style: italic;
    text-align: center;
    padding: 1rem 0;
}

.artist-item {
    padding: 0.75rem;
    background-color: #f8f9fa;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    text-align: center;
}

.artist-item:hover {
    background-color: var(--primary-light);
    color: white;
}

/* 页脚样式 */
footer {
    background-color: var(--card-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-container p {
    margin: 0.5rem 0;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .content-wrapper {
        flex-direction: column;
    }
    
    .sidebar {
        max-width: none;
        width: 100%;
    }
    
    .artist-list {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .artist-item {
        flex: 1 1 45%;
        text-align: center;
    }
}

/* 歌曲列表样式 */
.song-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background-color: var(--card-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.song-card {
    background-color: var(--card-color);
    padding: 1rem 1.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.song-card:last-child {
    border-bottom: none;
}

.song-card:hover {
    background-color: #f8f9fa;
}

.song-card.active {
    background-color: rgba(108, 99, 231, 0.05);
}

.song-index {
    width: 30px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-light);
    flex-shrink: 0;
}

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

.song-info h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-info p {
    margin: 0.25rem 0 0 0;
    color: var(--text-light);
    font-size: 0.85rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.song-duration {
    margin-right: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
    flex-shrink: 0;
}

.song-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    opacity: 1;
}

/* 歌曲操作按钮 */
.action-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.play-btn, .pause-btn {
    background-color: var(--primary-color);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1rem;
}

.play-btn:hover, .pause-btn:hover {
    background-color: var(--primary-dark);
    color: white;
}

.pause-btn {
    display: none;
}

.song-card.active .pause-btn {
    display: flex;
}

.song-card.active .play-btn {
    display: none;
}

.favorite-btn.active {
    color: #ff4757;
}

/* 底部播放器 */
.player {
    background-color: var(--card-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 99;
    transition: transform 0.3s ease;
}

.player.hidden {
    transform: translateY(100%);
}

.toggle-player-btn {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 25px;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: background-color 0.3s ease;
}

.toggle-player-btn:hover {
    background-color: var(--primary-dark);
}

.player.hidden .toggle-player-btn {
    border-radius: 0 0 8px 8px;
    top: auto;
    bottom: -25px;
}

.player.hidden .toggle-player-btn i {
    transform: rotate(180deg);
}

.player-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.current-song {
    flex: 1;
    min-width: 200px;
}

.current-song h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.current-song p {
    font-size: 0.85rem;
    color: var(--text-light);
}

.player-controls {
    flex: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.player-controls button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
    transition: var(--transition);
}

.player-controls button:hover {
    color: var(--primary-color);
}

.player-controls .play-pause-btn {
    background-color: var(--primary-color);
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-controls .play-pause-btn:hover {
    background-color: var(--primary-dark);
    color: white;
}

.progress-container {
    flex: 3;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.progress {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 2px;
    width: 0;
}

.time-display {
    font-size: 0.8rem;
    color: var(--text-light);
    min-width: 45px;
    text-align: center;
}

/* 后台导航样式 */
.admin-nav {
    background-color: var(--card-color);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.admin-nav ul {
    list-style: none;
    display: flex;
    gap: 0;
    overflow-x: auto;
}

.admin-nav li a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.admin-nav li a:hover {
    background-color: rgba(108, 99, 231, 0.05);
    color: var(--primary-color);
}

.admin-nav li a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: rgba(108, 99, 231, 0.05);
    font-weight: 500;
}

/* 管理页面样式 */
.admin-panel {
    background-color: var(--card-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.add-song-form {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(108, 99, 255, 0.2);
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: var(--primary-dark);
}

/* 管理歌曲列表 */
.manage-songs h2 {
    margin-bottom: 1rem;
}

.song-table {
    width: 100%;
    border-collapse: collapse;
}

.song-table th,
.song-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.song-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--text-color);
}

.delete-btn {
    background-color: var(--error-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.delete-btn:hover {
    background-color: #d32f2f;
}

/* 登录页面样式 */
.login-container {
    max-width: 400px;
    margin: 4rem auto;
    background-color: var(--card-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-light);
}

.login-form .form-group {
    margin-bottom: 1.25rem;
}

.login-form .submit-btn {
    width: 100%;
}

/* 设置页面样式 */
.settings-form h3,
.admin-account h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.2rem;
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
}

.settings-form h3:first-child,
.admin-account h3:first-child {
    margin-top: 0;
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
    width: 100%;
}

.settings-note {
    background-color: rgba(108, 99, 231, 0.05);
    border-left: 4px solid var(--primary-light);
    padding: 1rem;
    border-radius: 4px;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 头部导航优化 */
    .header-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 1rem;
    }
    
    /* 显示汉堡菜单按钮 */
    .menu-toggle {
        display: block;
        position: relative;
        order: 3;
        margin-left: auto;
    }
    
    /* 隐藏默认导航 */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--card-color);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 80px 20px 20px;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        gap: 0;
        z-index: 100;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        display: block;
        width: 100%;
        padding: 1rem 0;
        color: var(--text-color);
        font-size: 1.1rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .nav-links a::after {
        display: none;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
        color: var(--primary-color);
        background-color: rgba(108, 99, 231, 0.05);
    }
    
    /* 半透明遮罩 */
    .menu-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
    
    .menu-overlay.active {
        display: block;
    }
    
    /* 网站标题 */
    .site-branding h1 {
        font-size: 1.5rem;
    }
    
    main {
        padding: 1rem;
    }
    
    .player-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .current-song,
    .player-controls,
    .progress-container {
        flex: 1;
        width: 100%;
    }
    
    .song-table {
        display: block;
        overflow-x: auto;
    }
    
    /* 手机端歌曲列表优化 */
    .song-card {
        flex-wrap: wrap;
        padding: 0.75rem 1rem;
        gap: 0.75rem;
    }
    
    .song-index {
        width: 20px;
        font-size: 0.8rem;
    }
    
    .song-info {
        flex: 1;
        min-width: 0;
        order: 2;
        width: calc(100% - 40px);
    }
    
    .song-info h3 {
        font-size: 0.9rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .song-info p {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    
    .song-duration {
        margin-right: 0;
        font-size: 0.8rem;
        order: 3;
        width: 40px;
        text-align: right;
    }
    
    .song-actions {
        order: 4;
        width: 100%;
        justify-content: space-between;
        padding-top: 0.5rem;
        border-top: 1px solid var(--border-color);
    }
    
    .action-btn {
        font-size: 1rem;
        padding: 0.4rem;
    }
    
    .play-btn, .pause-btn {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
}

/* 更小屏幕优化 */
@media (max-width: 480px) {
    .song-actions {
        gap: 0.5rem;
        justify-content: space-around;
    }
    
    .action-btn {
        font-size: 0.9rem;
        padding: 0.3rem;
    }
    
    .play-btn, .pause-btn {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
    }
}

/* 通知样式 */
.notification {
    position: fixed;
    top: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 4px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background-color: var(--success-color);
}

.notification.error {
    background-color: var(--error-color);
}