/**
 * 移动端响应式设计优化
 * 针对手机端（< 768px）和平板端（768px - 1024px）的优化
 */

/* ===== 移动端优化（< 768px） ===== */
@media (max-width: 767px) {
    /* 导航栏优化 */
    .navbar {
        padding: 12px 0;
    }
    
    .navbar .container {
        padding: 0 16px;
    }
    
    .navbar .logo {
        font-size: 1.2rem;
    }
    
    .navbar .nav {
        display: none; /* 移动端隐藏导航链接，使用汉堡菜单 */
    }
    
    .navbar .nav-actions {
        gap: 8px;
    }
    
    .navbar .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    /* 汉堡菜单按钮 */
    .navbar .menu-toggle {
        display: flex;
    }
    
    /* 移动端导航菜单 */
    .navbar .mobile-nav {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        padding: 20px;
        box-shadow: var(--shadow-md);
        z-index: 999;
    }
    
    .navbar .mobile-nav.active {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    
    .navbar .mobile-nav a {
        padding: 12px 16px;
        border-radius: var(--radius-md);
        transition: background 0.2s;
    }
    
    .navbar .mobile-nav a:hover {
        background: var(--gray-100);
    }
    
    /* 页面容器优化 */
    .page-header-section,
    .user-profile-page,
    .story-page,
    .chapter-page {
        padding: 80px 16px 40px;
    }
    
    /* 容器优化 */
    .container {
        padding: 0 16px;
    }
    
    /* 用户头部信息优化 */
    .user-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 24px;
        gap: 24px;
    }
    
    .user-avatar img,
    .avatar-placeholder {
        width: 80px;
        height: 80px;
    }
    
    .user-stats {
        justify-content: center;
        gap: 20px;
    }
    
    .user-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    /* 故事网格优化 */
    .story-grid,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    /* 故事卡片优化 */
    .story-card {
        padding: 16px;
    }
    
    .story-card__title {
        font-size: 1.1rem;
    }
    
    /* 侧边栏布局优化 */
    .user-layout,
    .settings-layout,
    .bookshelf-layout {
        flex-direction: column;
    }
    
    .user-sidebar,
    .settings-sidebar,
    .bookshelf-sidebar {
        width: 100%;
        flex-shrink: 0;
    }
    
    .sidebar-nav {
        display: flex;
        overflow-x: auto;
        gap: 8px;
        padding-bottom: 12px;
    }
    
    .sidebar-link {
        white-space: nowrap;
        padding: 8px 16px;
    }
    
    /* 表单优化 */
    .form-group {
        margin-bottom: 16px;
    }
    
    .form-input,
    .form-textarea,
    .form-select {
        padding: 12px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    /* 按钮优化 */
    .btn {
        padding: 12px 20px;
        font-size: 0.95rem;
    }
    
    .btn-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .btn-group .btn {
        width: 100%;
    }
    
    /* 模态框优化 */
    .modal-content {
        margin: 20px;
        padding: 20px;
        max-height: calc(100vh - 40px);
        overflow-y: auto;
    }
    
    /* 表格优化 */
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    /* 章节阅读优化 */
    .chapter-content {
        font-size: 1.1rem;
        line-height: 1.8;
    }
    
    .chapter-nav {
        flex-direction: column;
        gap: 12px;
    }
    
    .chapter-nav .btn {
        width: 100%;
        text-align: center;
    }
    
    /* 评论区优化 */
    .comments-section {
        padding: 16px;
    }
    
    .comment-item {
        padding: 12px;
    }
    
    .comment-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    /* 消息列表优化 */
    .message-list {
        padding: 16px;
    }
    
    .message-item {
        padding: 12px;
    }
    
    /* 通知列表优化 */
    .notification-list {
        padding: 16px;
    }
    
    .notification-item {
        padding: 12px;
    }
    
    /* 页脚优化 */
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer .grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* ===== 平板端优化（768px - 1024px） ===== */
@media (min-width: 768px) and (max-width: 1024px) {
    /* 导航栏优化 */
    .navbar .container {
        padding: 0 24px;
    }
    
    .navbar .nav {
        gap: 20px;
    }
    
    /* 页面容器优化 */
    .page-header-section,
    .user-profile-page,
    .story-page,
    .chapter-page {
        padding: 100px 24px 60px;
    }
    
    /* 容器优化 */
    .container {
        padding: 0 24px;
    }
    
    /* 故事网格优化 */
    .story-grid,
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 用户布局优化 */
    .user-layout,
    .settings-layout {
        gap: 24px;
    }
    
    .user-sidebar,
    .settings-sidebar {
        width: 240px;
    }
    
    /* 侧边栏导航优化 */
    .sidebar-nav {
        flex-direction: column;
    }
    
    .sidebar-link {
        padding: 10px 16px;
    }
}

/* ===== 触摸优化 ===== */
@media (hover: none) and (pointer: coarse) {
    /* 增大触摸目标 */
    .btn,
    .sidebar-link,
    .nav a,
    .chapter-nav .btn,
    .comment-actions .btn,
    .message-actions .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* 移除悬停效果 */
    .btn:hover,
    .sidebar-link:hover,
    .nav a:hover,
    .story-card:hover {
        transform: none;
    }
    
    /* 添加触摸反馈 */
    .btn:active,
    .sidebar-link:active,
    .nav a:active,
    .story-card:active {
        transform: scale(0.98);
    }
}

/* ===== 横屏优化 ===== */
@media (max-height: 500px) and (orientation: landscape) {
    .navbar {
        padding: 8px 0;
    }
    
    .page-header-section,
    .user-profile-page,
    .story-page,
    .chapter-page {
        padding-top: 70px;
    }
    
    .modal-content {
        max-height: calc(100vh - 20px);
    }
}

/* ===== 高DPI屏幕优化 ===== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* 使用矢量图标 */
    .icon {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* ===== 深色主题移动端优化 ===== */
[data-theme="dark"] @media (max-width: 767px) {
    .navbar .mobile-nav {
        background: var(--gray-900);
    }
    
    .navbar .mobile-nav a:hover {
        background: var(--gray-800);
    }
}

/* ===== 打印优化 ===== */
@media print {
    .navbar,
    .footer,
    .btn,
    .actions,
    .chapter-nav,
    .comments-section {
        display: none;
    }
    
    .page-header-section,
    .user-profile-page,
    .story-page,
    .chapter-page {
        padding: 0;
    }
    
    .chapter-content {
        font-size: 12pt;
        line-height: 1.5;
    }
}