/* 移动端优化样式 */

/* 移动端特定样式 */
@media (max-width: 480px) {
    /* 导航栏优化 */
    .navbar {
        padding: 12px 0;
    }
    
    .navbar-content {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .logo {
        text-align: center;
        font-size: 20px;
    }
    
    .nav-links {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        width: 100%;
    }
    
    .nav-links a {
        text-align: center;
        padding: 12px 8px;
        font-size: 14px;
    }
    
    .user-menu {
        justify-content: center;
        gap: 12px;
    }
    
    /* 内容区域 */
    .main-content {
        padding: 12px;
    }
    
    .container {
        padding: 0 12px;
    }
    
    /* 欢迎横幅 */
    .welcome-banner h1 {
        font-size: 24px !important;
    }
    
    .welcome-banner p {
        font-size: 16px !important;
    }
    
    /* 卡片优化 */
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    /* 帖子卡片 */
    .post-card {
        margin-bottom: 16px;
    }
    
    .post-header {
        gap: 8px;
        margin-bottom: 12px;
    }
    
    .post-avatar {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .post-info h3 {
        font-size: 14px;
    }
    
    .post-info .post-time {
        font-size: 12px;
    }
    
    .post-content {
        font-size: 15px;
        line-height: 1.6;
        margin-bottom: 12px;
    }
    
    .post-category {
        padding: 4px 12px;
        font-size: 12px;
        margin-bottom: 12px;
    }
    
    .post-actions {
        flex-direction: column;
        gap: 8px;
        padding-top: 12px;
    }
    
    .action-btn {
        justify-content: center;
        padding: 10px 16px;
        width: 100%;
    }
    
    /* 按钮优化 */
    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .btn-primary,
    .btn-secondary {
        min-height: 44px; /* iOS推荐的最小触摸区域 */
    }
    
    /* 表单优化 */
    .form-input,
    .form-textarea,
    .form-select {
        padding: 14px 16px;
        font-size: 16px; /* 防止iOS缩放 */
        border-radius: 12px;
    }
    
    .form-textarea {
        min-height: 100px;
    }
    
    /* 分类选择器 */
    .category-selector {
        flex-direction: column;
        gap: 12px;
    }
    
    .category-option {
        padding: 20px 16px;
    }
    
    .category-option .emoji {
        font-size: 40px;
        margin-bottom: 8px;
    }
    
    .category-option .label {
        font-size: 16px;
    }
    
    /* 模态框优化 */
    .modal-overlay {
        padding: 12px;
        align-items: flex-end; /* 从底部弹出 */
    }
    
    .modal {
        max-width: none;
        width: 100%;
        max-height: 85vh;
        border-radius: 16px 16px 0 0;
        animation: modalSlideUp 0.3s ease;
    }
    
    @keyframes modalSlideUp {
        from {
            transform: translateY(100%);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }
    
    .modal-header {
        padding: 20px 20px 0;
        margin-bottom: 20px;
        position: relative;
    }
    
    .modal-header::after {
        content: '';
        position: absolute;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: 36px;
        height: 4px;
        background: var(--text-light);
        border-radius: 2px;
    }
    
    .modal-body {
        padding: 0 20px 20px;
    }
    
    /* 提示框优化 */
    .toast {
        bottom: 12px;
        left: 12px;
        right: 12px;
        padding: 12px 16px;
        font-size: 14px;
    }
    
    /* 加载状态优化 */
    .loading-spinner {
        width: 32px;
        height: 32px;
    }
    
    /* 空状态优化 */
    .empty-state {
        padding: 40px 16px;
    }
    
    .empty-state .emoji {
        font-size: 48px;
        margin-bottom: 12px;
    }
    
    .empty-state h3 {
        font-size: 18px;
    }
    
    /* 用户菜单优化 */
    #userMenu {
        position: fixed !important;
        top: auto !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        border-radius: 16px 16px 0 0 !important;
        min-width: auto !important;
        max-width: none !important;
        width: 100% !important;
    }
    
    /* 字符计数器 */
    #charCount {
        font-size: 12px;
    }
    
    /* 滚动优化 */
    body {
        -webkit-overflow-scrolling: touch;
    }
    
    /* 表单验证提示 */
    .form-error {
        color: var(--error-color);
        font-size: 12px;
        margin-top: 4px;
    }
    
    /* 触摸优化 */
    .nav-links a,
    .btn,
    .action-btn,
    .category-option,
    .user-avatar {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    /* 安全区域适配 */
    .navbar {
        padding-top: env(safe-area-inset-top, 15px);
    }
    
    .main-content {
        padding-bottom: env(safe-area-inset-bottom, 20px);
    }
    
    /* 横屏优化 */
    @media (orientation: landscape) and (max-height: 500px) {
        .welcome-banner {
            display: none;
        }
        
        .modal {
            max-height: 95vh;
        }
        
        .navbar-content {
            flex-direction: row;
            justify-content: space-between;
        }
        
        .nav-links {
            display: flex;
            grid-template-columns: none;
        }
    }
}

/* 超小屏幕优化 */
@media (max-width: 360px) {
    .main-content {
        padding: 8px;
    }
    
    .card {
        padding: 12px;
    }
    
    .welcome-banner h1 {
        font-size: 20px !important;
    }
    
    .logo {
        font-size: 18px;
    }
    
    .nav-links a {
        padding: 10px 6px;
        font-size: 12px;
    }
}

/* PWA样式 */
@media (display-mode: standalone) {
    .navbar {
        padding-top: calc(env(safe-area-inset-top) + 15px);
    }
    
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--text-primary);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .form-input,
    .form-textarea {
        border: 2px solid var(--text-primary);
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating {
        animation: none;
    }
}