/**
 * 移动端导航 - 完全独立的CSS解决方案
 * 不依赖GSAP或任何JS库，确保低性能设备也能正常使用
 * 与现有layout.html结构完全兼容
 */

/* 移动端设备标识 */
.mobile-device,
.no-gsap {
    /* 标识移动端或无GSAP环境 */
}

/* 隐藏复杂的设置区域，使用简化的主题切换 */
@media (max-width: 900px) {
    .mobile-settings-section {
        display: none !important;
    }
}

/* 移动端菜单切换按钮样式优化 */
@media (max-width: 900px) {
    .layout-mobile-menu-toggle {
        display: flex !important;
        align-items: center;
        gap: 0.5rem;
        position: relative;
        background: rgba(248, 250, 252, 0.9);
        border: 1px solid rgba(0, 0, 0, 0.08);
        border-radius: 10px;
        cursor: pointer;
        padding: 0.75rem 1rem;
        transition: all 0.2s ease;
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        color: var(--gray-700, #374151);
        font-weight: 500;
        font-size: 0.875rem;
        flex-shrink: 0;
        z-index: 1002;
        outline: none;
        -webkit-tap-highlight-color: transparent;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    }
    
    .layout-mobile-menu-toggle:hover,
    .layout-mobile-menu-toggle:focus {
        background: rgba(248, 250, 252, 1);
        border-color: rgba(0, 0, 0, 0.12);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }
    
    .layout-mobile-menu-toggle:active {
        transform: translateY(0);
        background: rgba(230, 230, 230, 0.8);
    }
    
    .layout-mobile-menu-toggle svg {
        width: 20px;
        height: 20px;
        color: currentColor;
        transition: color 0.2s ease;
    }
    
    .layout-mobile-menu-toggle:hover svg {
        color: var(--primary-color, #3b82f6);
    }
}

/* 移动端导航容器 - 主题适配版本 */
@media (max-width: 900px) {
    .layout-mobile-nav {
        position: fixed !important;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        height: 100dvh; /* 现代浏览器使用动态视口高度 */
        background: var(--theme-bg-primary) !important;
        backdrop-filter: blur(20px) !important;
        -webkit-backdrop-filter: blur(20px) !important;
        z-index: 1001;
        padding: 2rem;
        
        /* 关键：使用transform而不是display来控制显示隐藏 */
        transform: translateX(-100%) !important;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
        
        /* 确保始终存在但在屏幕外 */
        display: block !important;
        visibility: visible;
        opacity: 1;
        
        overflow-y: auto;
        overflow-x: hidden;
        
        /* 性能优化 */
        will-change: transform;
        backface-visibility: hidden;
        -webkit-overflow-scrolling: touch;
        
        /* 主题切换动画 */
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                   background-color var(--theme-transition-normal),
                   color var(--theme-transition-normal) !important;
    }
    
    /* 深色主题下的移动端导航 */
    [data-theme="dark"] .layout-mobile-nav {
        background: rgba(15, 23, 42, 0.95) !important;
        border-right: 1px solid rgba(71, 85, 105, 0.3);
    }
    
    /* 菜单激活状态 */
    .layout-mobile-nav.active {
        transform: translateX(0) !important;
    }
}

/* 菜单关闭按钮 - 主题适配 */
@media (max-width: 900px) {
    .layout-mobile-nav-close {
        position: absolute !important;
        top: 1.5rem;
        right: 1.5rem;
        background: var(--theme-card-bg) !important;
        border: 1px solid var(--theme-card-border) !important;
        border-radius: 12px !important;
        cursor: pointer;
        padding: 0.75rem !important;
        transition: all var(--theme-transition-normal) !important;
        z-index: 1003;
        outline: none;
        -webkit-tap-highlight-color: transparent;
        backdrop-filter: blur(10px);
    }
    
    /* 深色主题下的关闭按钮 */
    [data-theme="dark"] .layout-mobile-nav-close {
        background: rgba(51, 65, 85, 0.8) !important;
        border-color: rgba(71, 85, 105, 0.3) !important;
    }
    
    .layout-mobile-nav-close:hover,
    .layout-mobile-nav-close:focus {
        background: var(--theme-hover-bg) !important;
        border-color: var(--theme-brand-error) !important;
        transform: scale(1.05);
    }
    
    /* 深色主题下的关闭按钮悬浮效果 */
    [data-theme="dark"] .layout-mobile-nav-close:hover,
    [data-theme="dark"] .layout-mobile-nav-close:focus {
        background: rgba(51, 65, 85, 1) !important;
        border-color: #ef4444 !important;
    }
    
    .layout-mobile-nav-close:active {
        transform: scale(0.95);
    }
    
    .layout-mobile-nav-close svg {
        width: 20px;
        height: 20px;
        color: var(--theme-text-primary);
        display: block;
        transition: color var(--theme-transition-normal);
    }
    
    /* 深色主题下的关闭按钮图标 */
    [data-theme="dark"] .layout-mobile-nav-close svg {
        color: #f1f5f9;
    }
}

/* Logo区域 - 主题适配 */
@media (max-width: 900px) {
    .layout-mobile-nav .layout-logo {
        margin-bottom: 2rem !important;
        padding-bottom: 1.5rem;
        border-bottom: 1px solid var(--theme-border-primary);
        transition: border-color var(--theme-transition-normal);
    }
    
    /* 深色主题下的Logo区域 */
    [data-theme="dark"] .layout-mobile-nav .layout-logo {
        border-bottom-color: rgba(71, 85, 105, 0.3);
    }
    
    .layout-mobile-nav .layout-logo-text {
        color: var(--theme-text-primary);
        transition: color var(--theme-transition-normal);
    }
    
    /* 深色主题下的Logo文字 */
    [data-theme="dark"] .layout-mobile-nav .layout-logo-text {
        color: #f1f5f9;
    }
}

/* 导航列表 */
@media (max-width: 900px) {
    .layout-mobile-nav-list {
        list-style: none !important;
        padding: 0 !important;
        margin: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 0.5rem !important;
    }
}

/* 导航项目 - 纯CSS动画，不依赖JavaScript */
@media (max-width: 900px) {
    .layout-mobile-nav-item {
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.5s ease;
        animation: none; /* 重置原有动画 */
    }
    
    /* 激活时的延迟动画 - 纯CSS实现 */
    .layout-mobile-nav.active .layout-mobile-nav-item {
        opacity: 1;
        transform: translateY(0);
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item:nth-child(1) {
        transition-delay: 0.1s;
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item:nth-child(2) {
        transition-delay: 0.2s;
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item:nth-child(3) {
        transition-delay: 0.3s;
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item:nth-child(4) {
        transition-delay: 0.4s;
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item:nth-child(5) {
        transition-delay: 0.5s;
    }
}

/* 导航链接样式 - 主题适配 */
@media (max-width: 900px) {
    .layout-mobile-nav-link {
        color: var(--theme-text-primary) !important;
        text-decoration: none !important;
        font-size: 1.25rem !important;
        font-weight: 600 !important;
        padding: 1rem 1.5rem !important;
        border-radius: 12px !important;
        display: block !important;
        transition: all var(--theme-transition-normal) !important;
        position: relative !important;
        overflow: hidden !important;
        outline: none;
        -webkit-tap-highlight-color: transparent;
        border: 1px solid transparent;
    }
    
    /* 深色主题下的导航链接 */
    [data-theme="dark"] .layout-mobile-nav-link {
        color: #cbd5e1 !important;
    }
    
    .layout-mobile-nav-link::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--theme-brand-primary), var(--theme-brand-secondary));
        opacity: 0;
        transition: opacity var(--theme-transition-normal);
        border-radius: 12px;
        z-index: -1;
    }
    
    /* 深色主题下的导航链接背景 */
    [data-theme="dark"] .layout-mobile-nav-link::before {
        background: linear-gradient(135deg, #60a5fa, #93c5fd);
    }
}

/* 导航链接悬停效果 - 只在桌面端生效 */
@media (hover: hover) and (pointer: fine) and (max-width: 900px) {
    .layout-mobile-nav-link:hover::before {
        opacity: 0.1;
    }
    
    .layout-mobile-nav-link:hover {
        color: var(--theme-brand-primary) !important;
        background-color: rgba(59, 130, 246, 0.1) !important;
        transform: translateX(8px) !important;
        border-color: var(--theme-brand-primary);
    }
    
    /* 深色主题下的导航链接悬停效果 */
    [data-theme="dark"] .layout-mobile-nav-link:hover {
        color: #60a5fa !important;
        background-color: rgba(96, 165, 250, 0.15) !important;
        border-color: #60a5fa;
    }
}

/* 触摸设备的反馈 */
@media (hover: none) and (pointer: coarse) and (max-width: 900px) {
    .layout-mobile-nav-link:active {
        color: var(--theme-brand-primary) !important;
        background-color: rgba(59, 130, 246, 0.1) !important;
        transform: scale(0.98) !important;
    }
    
    /* 深色主题下的触摸反馈 */
    [data-theme="dark"] .layout-mobile-nav-link:active {
        color: #60a5fa !important;
        background-color: rgba(96, 165, 250, 0.15) !important;
    }
}

/* 活跃状态 - 主题适配 */
@media (max-width: 900px) {
    .layout-mobile-nav-item.active .layout-mobile-nav-link {
        color: white !important;
        background: linear-gradient(135deg, var(--theme-brand-primary) 0%, var(--theme-brand-secondary) 100%) !important;
        box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3) !important;
        border-color: transparent;
    }
    
    /* 深色主题下的活跃状态 */
    [data-theme="dark"] .layout-mobile-nav-item.active .layout-mobile-nav-link {
        background: linear-gradient(135deg, #60a5fa 0%, #93c5fd 100%) !important;
        box-shadow: 0 4px 15px rgba(96, 165, 250, 0.3) !important;
    }
    
    /* 活跃状态的悬停效果 */
    .layout-mobile-nav-item.active .layout-mobile-nav-link:hover {
        color: white !important;
        background: linear-gradient(135deg, var(--theme-brand-secondary) 0%, var(--theme-brand-primary) 100%) !important;
        transform: translateX(8px) !important;
    }
    
    /* 深色主题下的活跃状态悬停效果 */
    [data-theme="dark"] .layout-mobile-nav-item.active .layout-mobile-nav-link:hover {
        background: linear-gradient(135deg, #93c5fd 0%, #60a5fa 100%) !important;
    }
}

/* 移动端语言切换区域 - 简化设计 */
@media (max-width: 900px) {
    .mobile-language-section {
        margin: 1.5rem 0;
        padding: 1rem;
        background: var(--theme-card-bg);
        border-radius: 12px;
        border: 1px solid var(--theme-card-border);
        transition: all var(--theme-transition-normal);
    }
    
    /* 深色主题下的语言切换区域 */
    [data-theme="dark"] .mobile-language-section {
        background: rgba(51, 65, 85, 0.5);
        border-color: rgba(71, 85, 105, 0.3);
    }
    
    .mobile-language-label {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--theme-text-secondary);
        margin-bottom: 0.75rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    /* 深色主题下的语言标签 */
    [data-theme="dark"] .mobile-language-label {
        color: #94a3b8;
    }
    
    .mobile-language-switcher {
        display: flex;
        gap: 0.5rem;
        background: var(--theme-bg-secondary);
        padding: 0.25rem;
        border-radius: 8px;
        border: 1px solid var(--theme-border-primary);
    }
    
    /* 深色主题下的语言切换器 */
    [data-theme="dark"] .mobile-language-switcher {
        background: rgba(30, 41, 59, 0.8);
        border-color: rgba(71, 85, 105, 0.3);
    }
    
    .mobile-lang-btn {
        flex: 1;
        padding: 0.5rem 0.75rem;
        border: none;
        border-radius: 6px;
        background: transparent;
        color: var(--theme-text-secondary);
        font-size: 0.875rem;
        font-weight: 500;
        cursor: pointer;
        transition: all var(--theme-transition-normal);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        outline: none;
    }
    
    /* 深色主题下的语言按钮 */
    [data-theme="dark"] .mobile-lang-btn {
        color: #94a3b8;
    }
    
    .mobile-lang-btn.active {
        background: var(--theme-brand-primary);
        color: white;
        box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
    }
    
    /* 深色主题下的活跃语言按钮 */
    [data-theme="dark"] .mobile-lang-btn.active {
        background: #60a5fa;
        box-shadow: 0 2px 4px rgba(96, 165, 250, 0.3);
    }
    
    .mobile-lang-btn:not(.active):hover {
        background: rgba(59, 130, 246, 0.1);
        color: var(--theme-brand-primary);
    }
    
    /* 深色主题下的语言按钮悬浮效果 */
    [data-theme="dark"] .mobile-lang-btn:not(.active):hover {
        background: rgba(96, 165, 250, 0.15);
        color: #60a5fa;
    }
    
    .lang-flag {
        font-size: 1rem;
    }
}

/* 移动端主题切换区域 - 简化设计 */
@media (max-width: 900px) {
    .mobile-theme-section {
        margin: 1.5rem 0;
        padding: 1rem;
        background: var(--theme-card-bg);
        border-radius: 12px;
        border: 1px solid var(--theme-card-border);
        transition: all var(--theme-transition-normal);
    }
    
    /* 深色主题下的主题切换区域 */
    [data-theme="dark"] .mobile-theme-section {
        background: rgba(51, 65, 85, 0.5);
        border-color: rgba(71, 85, 105, 0.3);
    }
    
    .mobile-theme-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 0.5rem;
    }
    
    .mobile-theme-title {
        font-size: 1rem;
        font-weight: 600;
        color: var(--theme-text-primary);
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    /* 深色主题下的主题标题 */
    [data-theme="dark"] .mobile-theme-title {
        color: #f1f5f9;
    }
    
    .mobile-theme-toggle {
        background: var(--theme-bg-secondary);
        border: 1px solid var(--theme-border-primary);
        border-radius: 20px;
        padding: 0.25rem;
        cursor: pointer;
        transition: all var(--theme-transition-normal);
        width: 48px;
        height: 28px;
        position: relative;
        outline: none;
    }
    
    /* 深色主题下的主题切换按钮 */
    [data-theme="dark"] .mobile-theme-toggle {
        background: rgba(30, 41, 59, 0.8);
        border-color: rgba(71, 85, 105, 0.3);
    }
    
    .mobile-theme-toggle-track {
        width: 100%;
        height: 100%;
        position: relative;
        border-radius: 16px;
        background: linear-gradient(135deg, var(--theme-brand-primary), var(--theme-brand-secondary));
        transition: all var(--theme-transition-normal);
    }
    
    /* 深色主题下的切换轨道 */
    [data-theme="dark"] .mobile-theme-toggle-track {
        background: linear-gradient(135deg, #60a5fa, #93c5fd);
    }
    
    .mobile-theme-toggle-thumb {
        position: absolute;
        top: 2px;
        left: 2px;
        width: 20px;
        height: 20px;
        background: white;
        border-radius: 50%;
        transition: transform var(--theme-transition-normal);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    }
    
    /* 深色模式时的thumb位置 */
    [data-theme="dark"] .mobile-theme-toggle-thumb {
        transform: translateX(20px);
    }
    
    .mobile-theme-toggle .theme-icon {
        width: 12px;
        height: 12px;
        color: var(--theme-text-muted);
        transition: all var(--theme-transition-normal);
    }
    
    /* 图标显示控制 */
    [data-theme="light"] .theme-icon-sun {
        opacity: 1;
    }
    
    [data-theme="light"] .theme-icon-moon {
        opacity: 0;
        position: absolute;
    }
    
    [data-theme="dark"] .theme-icon-sun {
        opacity: 0;
        position: absolute;
    }
    
    [data-theme="dark"] .theme-icon-moon {
        opacity: 1;
    }
}

/* 移动端用户认证区域 - 主题适配 */
@media (max-width: 900px) {
    .mobile-auth-area {
        margin-top: 1.5rem !important;
        padding-top: 1.5rem !important;
        border-top: 1px solid var(--theme-border-primary) !important;
        transition: border-color var(--theme-transition-normal);
    }
    
    /* 深色主题下的认证区域 */
    [data-theme="dark"] .mobile-auth-area {
        border-top-color: rgba(71, 85, 105, 0.3) !important;
    }
    
    .mobile-auth-button {
        width: 100%;
        padding: 1rem;
        background: linear-gradient(135deg, var(--theme-brand-primary), var(--theme-brand-secondary));
        color: white;
        border: none;
        border-radius: 12px;
        font-size: 1rem;
        font-weight: 600;
        cursor: pointer;
        transition: all var(--theme-transition-normal);
        outline: none;
    }
    
    /* 深色主题下的认证按钮 */
    [data-theme="dark"] .mobile-auth-button {
        background: linear-gradient(135deg, #60a5fa, #93c5fd);
    }
    
    .mobile-auth-button:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
    }
    
    /* 深色主题下的认证按钮悬浮效果 */
    [data-theme="dark"] .mobile-auth-button:hover {
        box-shadow: 0 8px 25px rgba(96, 165, 250, 0.3);
    }
    
    .mobile-auth-button:active {
        transform: translateY(0);
    }
    
    .mobile-user-info {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        gap: 1rem !important;
        text-align: center !important;
    }
    
    .mobile-user-info .layout-user-avatar {
        width: 60px !important;
        height: 60px !important;
        font-size: 1.5rem !important;
        flex-shrink: 0 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        min-width: 60px !important;
        min-height: 60px !important;
        border-radius: 50% !important;
        overflow: hidden !important;
        background: linear-gradient(135deg, var(--theme-brand-primary), var(--theme-brand-secondary));
        color: white;
    }
    
    /* 深色主题下的用户头像 */
    [data-theme="dark"] .mobile-user-info .layout-user-avatar {
        background: linear-gradient(135deg, #60a5fa, #93c5fd);
    }
    
    .mobile-user-info .layout-user-name {
        font-size: 1.25rem !important;
        font-weight: 600 !important;
        color: var(--theme-text-primary) !important;
        transition: color var(--theme-transition-normal);
    }
    
    /* 深色主题下的用户名 */
    [data-theme="dark"] .mobile-user-info .layout-user-name {
        color: #f1f5f9 !important;
    }
}

/* 小屏幕优化 */
@media (max-width: 480px) {
    .layout-mobile-nav {
        padding: 1.5rem !important;
    }
    
    .layout-mobile-nav-close {
        top: 1rem !important;
        right: 1rem !important;
        padding: 0.5rem !important;
    }
    
    .layout-mobile-nav .layout-logo {
        margin-bottom: 2rem !important;
    }
    
    .layout-mobile-nav-link {
        font-size: 1.125rem !important;
        padding: 0.875rem 1.25rem !important;
    }
    
    .mobile-auth-area {
        margin-top: 1.5rem !important;
        padding-top: 1.5rem !important;
    }
}

/* 超小屏幕优化 */
@media (max-width: 320px) {
    .layout-mobile-nav {
        padding: 1rem !important;
    }
    
    .layout-mobile-nav-link {
        font-size: 1rem !important;
        padding: 0.75rem 1rem !important;
    }
    
    .mobile-user-info .layout-user-avatar {
        width: 50px !important;
        height: 50px !important;
        font-size: 1.25rem !important;
    }
}

/* 横屏模式优化 */
@media (orientation: landscape) and (max-height: 600px) and (max-width: 900px) {
    .layout-mobile-nav {
        padding: 1rem !important;
    }
    
    .layout-mobile-nav .layout-logo {
        margin-bottom: 1.5rem !important;
        padding-bottom: 1rem;
    }
    
    .layout-mobile-nav-list {
        margin: 1rem 0 !important;
        gap: 0.25rem !important;
    }
    
    .layout-mobile-nav-link {
        padding: 0.75rem 1.25rem !important;
        font-size: 1.125rem !important;
    }
    
    .mobile-auth-area {
        margin-top: 1rem !important;
        padding-top: 1rem !important;
    }
    
    .mobile-user-info {
        flex-direction: row !important;
        text-align: left !important;
        gap: 1rem !important;
    }
    
    .mobile-user-info .layout-user-avatar {
        width: 40px !important;
        height: 40px !important;
        font-size: 1rem !important;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .layout-mobile-nav,
    .layout-mobile-nav-item,
    .layout-mobile-nav-link,
    .layout-mobile-menu-toggle,
    .layout-mobile-nav-close {
        transition: none !important;
        animation: none !important;
    }
    
    .layout-mobile-nav.active .layout-mobile-nav-item {
        transition-delay: 0s !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    @media (max-width: 900px) {
        .layout-mobile-menu-toggle,
        .layout-mobile-nav-close {
            border-width: 3px !important;
            border-color: currentColor !important;
        }
        
        .layout-mobile-nav-link {
            border: 1px solid transparent !important;
        }
        
        .layout-mobile-nav-link:hover,
        .layout-mobile-nav-link:focus {
            border-color: currentColor !important;
        }
        
        .layout-mobile-nav-item.active .layout-mobile-nav-link {
            border-color: white !important;
        }
    }
}

/* 防止内容滚动穿透 */
@media (max-width: 900px) {
    body.mobile-nav-open {
        overflow: hidden !important;
        position: fixed !important;
        width: 100% !important;
    }
}

/* iOS Safari 特殊处理 */
@supports (-webkit-touch-callout: none) {
    @media (max-width: 900px) {
        .layout-mobile-nav {
            /* iOS Safari 需要特殊的高度处理 */
            height: -webkit-fill-available !important;
        }
    }
}

/* 确保在GSAP加载失败时正常工作 */
.no-gsap .layout-mobile-nav,
.mobile-device .layout-mobile-nav {
    /* 使用纯CSS动画 */
    animation: none !important;
}

/* 降级支持：如果JavaScript完全失效 */
@media (max-width: 900px) {
    .layout-mobile-nav:target {
        transform: translateX(0) !important;
    }
}