/**
 * mobile.css - 移动端响应式样式
 * 仅在屏幕宽度 <= 768px 时加载
 */

 @media (max-width: 768px) {
    /* ========== Header 适配 ========== */
    .header {
        padding: 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-left, .header-right {
        min-width: auto;
        width: 100%;
        justify-content: center;
        text-align: center;
    }
    
    .header-center h1 {
        font-size: 1.5rem;
    }
    
    /* ========== Container 适配 ========== */
    .container {
        padding: 0 1rem;
        margin: 1rem auto;
        gap: 1rem;
    }
    
    .card {
        padding: 1.2rem;
    }
    
    /* ========== 搜索控制面板适配 ========== */
    .form-section {
        flex-direction: column;
        gap: 1rem;
    }
    
    .form-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0.3rem;
    }
    
    .form-group label {
        text-align: left;
        flex-basis: auto;
    }
    
    /* 复选框组：按 100% 页面宽度自动换行 */
    .checkbox-group {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 0.75rem 1.25rem;
        padding-bottom: 1rem;
    }
    
    /* 移动端不显示"备注搜索规则"说明 */
    .search-rules-example {
        display: none;
    }
    
    /* ========== 按钮组适配 ========== */
    .button-group {
        flex-direction: column;
        gap: 0.5rem;
        padding-top: 1rem;
    }
    
    .btn {
        width: 100%;
        min-width: auto;
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    /* 管理员按钮可以两列排列节省空间 */
    .admin-button-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .admin-button-row .btn {
        width: auto;
    }
    
    /* ========== 表格隐藏，显示卡片视图 ========== */
    .data-table {
        display: none;
    }
    
    /* 移动端卡片容器 */
    .mobile-card-container {
        display: block;
    }
    
    /* 移动端头部控件（排序和全选） */
    .mobile-header-controls {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        padding: 0.8rem;
        border-bottom: 2px solid var(--border-color);
        margin-bottom: 1rem;
        background-color: var(--secondary-color);
        border-radius: 6px;
    }
    
    .mobile-header-controls .sort-control {
        width: 100%;
    }
    
    .mobile-header-controls .sort-control label {
        font-size: 0.9rem;
    }
    
    .mobile-header-controls .sort-select {
        width: 100%;
        min-width: auto;
    }
    
    /* 移动端全选控件 */
    .mobile-select-all {
        padding: 0;
    }
    
    .mobile-select-all label {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-secondary-color);
        cursor: pointer;
    }
    
    .mobile-select-all input[type="checkbox"] {
        width: 1.2rem;
        height: 1.2rem;
        cursor: pointer;
    }
    
    /* 音乐卡片样式 */
    .music-card {
        background: white;
        border-radius: 8px;
        padding: 1rem;
        margin-bottom: 1rem;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        border-left: 4px solid var(--primary-color);
        transition: all 0.3s ease;
    }
    
    .music-card:active {
        transform: scale(0.98);
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
    }
    
    .music-card-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        margin-bottom: 0.4rem;
        gap: 0.8rem;
    }
    
    .mobile-expand-container {
        flex-shrink: 0;
        padding-top: 0.2rem;
    }
    
    .music-card-title-wrapper {
        flex: 1;
        min-width: 0;
    }
    
    .music-card-title {
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--text-color);
        margin: 0 0 0.3rem 0;
        word-break: break-word;
    }
    
    /* 移动端子条目标签容器 */
    .variant-tags-container {
        display: flex;
        flex-wrap: wrap;
        gap: 0.3rem;
        margin-top: 0.2rem;
    }
    
    /* 移动端子条目标签 */
    .variant-tag {
        display: inline-block;
        padding: 0.15rem 0.5rem;
        background-color: #e8f0fe;
        color: var(--primary-color);
        border-radius: 12px;
        font-size: 0.7rem;
        font-weight: 500;
        border: 1px solid rgba(74, 144, 226, 0.2);
    }
    
    .music-card-bpm {
        background-color: var(--primary-color);
        color: white;
        padding: 0.2rem 0.6rem;
        border-radius: 4px;
        font-size: 0.8rem;
        font-weight: 500;
        white-space: nowrap;
    }
    
    .music-card-meta {
        display: flex;
        gap: 1rem;
        margin-bottom: 0.5rem;
        font-size: 0.85rem;
        color: var(--text-secondary-color);
    }
    
    .music-card-duration {
        display: flex;
        align-items: center;
        gap: 0.3rem;
    }
    
    .music-card-timestamp {
        display: flex;
        align-items: center;
        gap: 0.3rem;
    }
    
    .music-card-remark {
        color: var(--text-secondary-color);
        font-size: 0.9rem;
        margin: 0.5rem 0;
        line-height: 1.5;
        word-break: break-word;
    }
    
    .music-card-remark.empty {
        color: #ccc;
        font-style: italic;
    }
    
    .music-card-actions {
        display: flex;
        gap: 0.5rem;
        margin-top: 0.8rem;
        flex-wrap: wrap;
    }
    
    .music-card-actions a,
    .music-card-actions button {
        flex: 1;
        min-width: 80px;
        padding: 0.5rem 1rem;
        border-radius: 6px;
        text-decoration: none;
        text-align: center;
        font-size: 0.85rem;
        font-weight: 500;
        cursor: pointer;
        border: none;
        transition: all 0.2s ease;
    }
    
    .btn-card-play {
        background-color: var(--success-color);
        color: white;
    }
    
    .btn-card-play:hover,
    .btn-card-play:active {
        background-color: var(--success-hover-color);
    }
    
    .btn-card-download {
        background-color: var(--primary-color);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .btn-card-download:hover,
    .btn-card-download:active {
        background-color: var(--primary-hover-color);
    }
    
    .btn-card-delete {
        background-color: var(--danger-color);
        color: white;
    }
    
    .btn-card-delete:hover,
    .btn-card-delete:active {
        background-color: var(--danger-hover-color);
    }
    
    .btn-card-copy-link {
        background-color: #17a2b8;
        color: white;
        border: none;
        padding: 0.5rem 1rem;
        border-radius: 4px;
        cursor: pointer;
        font-size: 0.9rem;
        margin: 0 0.25rem;
        white-space: nowrap;
    }
    
    .btn-card-copy-link:hover,
    .btn-card-copy-link:active {
        background-color: #138496;
    }
    
    /* 确保移动端按钮容器可以换行 */
    .music-card-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .sub-variant-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 0.25rem;
        align-items: center;
    }
    
    .btn-card-edit {
        background-color: #ff9a56;
        color: white;
    }
    
    .btn-card-edit:hover,
    .btn-card-edit:active {
        background-color: #e8834a;
    }
    
    /* 卡片选择框 */
    .music-card-select {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        margin-top: 0.5rem;
        padding-top: 0.5rem;
        border-top: 1px solid var(--border-color);
    }
    
    .music-card-select label {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-size: 0.85rem;
        color: var(--text-secondary-color);
        cursor: pointer;
    }
    
    .music-card-select input[type="checkbox"] {
        width: 1.2rem;
        height: 1.2rem;
        cursor: pointer;
    }
    
    /* 移动端子条目容器 - 紧凑样式 */
    .music-sub-card {
        margin-top: -0.5rem;
        margin-bottom: 1rem;
        padding: 0.3rem;
        background-color: #f8f9fa;
        border-radius: 0 0 8px 8px;
        border-top: 2px solid var(--border-color);
    }
    
    .mobile-sub-variants-list {
        max-height: 150px;
        overflow-y: auto;
        overflow-x: hidden;
    }
    
    /* 移动端子条目项 - 紧凑样式，小字体 */
    .mobile-sub-variant-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.35rem 0.6rem;
        margin-bottom: 0.25rem;
        background-color: var(--white-color);
        border: 1px solid var(--border-color);
        border-radius: 6px;
        min-height: 36px;
        font-size: 0.85rem;
    }
    
    .mobile-sub-variant-item:last-child {
        margin-bottom: 0;
    }
    
    .mobile-sub-variant-item .sub-variant-label {
        font-weight: 500;
        color: var(--text-color);
        font-size: 0.8rem;
        flex: 1;
    }
    
    .mobile-sub-variant-item .sub-variant-actions {
        display: flex;
        gap: 0.4rem;
        align-items: center;
    }
    
    .mobile-sub-variant-item .sub-variant-actions a,
    .mobile-sub-variant-item .sub-variant-actions button {
        padding: 0.25rem 0.6rem;
        font-size: 0.75rem;
        min-width: auto;
        flex: none;
    }
    
    /* ========== 音频播放器适配 ========== */
    .audio-player-container {
        flex-direction: column;
        padding: 0.8rem 1rem;
        gap: 0.5rem;
    }
    
    .audio-player-container p {
        font-size: 0.9rem;
        text-align: center;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        width: 100%;
    }
    
    .audio-player-container audio {
        width: 100%;
    }
    
    body.player-active .floating-controls {
        bottom: 100px;
    }
    
    /* ========== 浮动按钮适配 ========== */
    .floating-controls {
        bottom: 20px;
        right: 20px;
    }
    
    .play-pause-btn, .back-to-top {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    /* ========== 登录模态框适配 ========== */
    .login-box {
        width: 95%;
        padding: 2rem 1.5rem;
        max-width: 350px;
    }
    
    .login-box h2 {
        font-size: 1.3rem;
    }
    
    /* ========== 通知容器适配 ========== */
    .notification-container {
        max-width: calc(100% - 40px);
        right: 10px;
        left: 10px;
        top: 10px;
    }
    
    .notification {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
}

/* ========== 超小屏幕适配 (< 480px) ========== */
@media (max-width: 480px) {
    .header-center h1 {
        font-size: 1.3rem;
    }
    
    .music-card {
        padding: 0.8rem;
    }
    
    .music-card-title {
        font-size: 1rem;
    }
    
    .music-card-actions {
        flex-direction: column;
    }
    
    .music-card-actions a,
    .music-card-actions button {
        width: 100%;
    }
}