/* ============================================
   AI工具集 - 响应式样式
   ============================================ */

/* 平板端样式 (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .navbar-container {
    padding: 0 var(--spacing-md);
  }
  
  .navbar-search {
    margin: 0 var(--spacing-lg);
  }
  
  .main-content {
    padding: var(--spacing-lg);
  }
  
  .tools-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
  }
  
  .content-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }
  
  .content-actions {
    justify-content: space-between;
  }
}

/* 移动端样式 (最大768px) */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 280px;
    --spacing-xl: 20px;
    --spacing-lg: 16px;
  }
  
  /* 导航栏移动端适配 */
  .navbar-container {
    padding: 0 var(--spacing-md);
  }
  
  .navbar-brand {
    min-width: auto;
  }
  
  .brand-text {
    display: none;
  }
  
  .navbar-search {
    margin: 0 var(--spacing-md);
    max-width: none;
  }
  
  .sidebar-toggle {
    display: flex;
  }
  
  /* 主体容器移动端 */
  .main-container {
    grid-template-columns: 1fr;
  }
  
  /* 侧边栏移动端 */
  .sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: var(--sidebar-width);
    height: 100vh;
    z-index: 1001;
    transform: translateX(0);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .sidebar.active {
    transform: translateX(100%);
  }
  
  .sidebar-header {
    padding-top: calc(var(--navbar-height) + var(--spacing-md));
  }
  
  .sidebar-close {
    display: block;
  }
  
  .sidebar-overlay {
    display: block;
  }
  
  /* 主内容区移动端 */
  .main-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  
  .page-title h1 {
    font-size: 1.6rem;
  }
  
  .content-header {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .content-actions {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }
  
  /* 工具网格移动端 */
  .tools-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .tool-card {
    padding: var(--spacing-md);
  }
  
  /* 列表视图移动端 */
  .tools-grid.list-view .tool-card {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-lg);
  }
  
  .tools-grid.list-view .card-icon {
    margin-right: 0;
    margin-bottom: var(--spacing-md);
  }
  
  .tools-grid.list-view .card-action {
    margin-left: 0;
    margin-top: var(--spacing-md);
    width: 100%;
  }
  
  /* 回到顶部按钮移动端 */
  .back-to-top {
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 44px;
    height: 44px;
  }
}

/* 小屏移动端 (最大480px) */
@media (max-width: 480px) {
  :root {
    --sidebar-width: 260px;
  }
  
  .navbar-container {
    padding: 0 var(--spacing-sm);
  }
  
  .navbar-search {
    margin: 0 var(--spacing-sm);
  }
  
  .search-container {
    padding: var(--spacing-sm);
  }
  
  .main-content {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .page-title h1 {
    font-size: 1.4rem;
  }
  
  .tools-grid {
    gap: var(--spacing-sm);
  }
  
  .tool-card {
    padding: var(--spacing-md);
  }
  
  .card-icon {
    width: 48px;
    height: 48px;
  }
  
  .card-icon i {
    font-size: 1.3rem;
  }
  
  .card-title {
    font-size: 1.1rem;
  }
  
  .back-to-top {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
  }
}

/* 横屏手机适配 */
@media (max-width: 768px) and (orientation: landscape) {
  .sidebar-header {
    padding-top: var(--spacing-lg);
  }
  
  .main-content {
    padding-top: var(--spacing-md);
  }
}

/* 高分辨率屏幕适配 */
@media (min-width: 1400px) {
  :root {
    --content-max-width: 1400px;
  }
  
  .tools-grid {
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  }
}

/* 超宽屏适配 */
@media (min-width: 1800px) {
  :root {
    --content-max-width: 1600px;
  }
  
  .tools-grid {
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  }
}

/* 打印样式 */
@media print {
  .top-navbar,
  .sidebar,
  .back-to-top,
  .sidebar-overlay {
    display: none !important;
  }
  
  .main-container {
    grid-template-columns: 1fr;
    margin-top: 0;
  }
  
  .main-content {
    padding: 0;
    background: white;
  }
  
  .tool-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  .card-action {
    display: none;
  }
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 高对比度支持 */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --border-light: #333333;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  }
  
  .tool-card {
    border: 2px solid var(--border-color);
  }
  
  .category-link:hover,
  .category-item.active .category-link {
    border-left-width: 4px;
  }
}

/* 暗色主题偏好 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-card: #2d2d2d;
    --bg-hover: #3a3a3a;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #999999;
    
    --border-color: #404040;
    --border-light: #333333;
  }
}

/* 焦点可见性增强 */
@media (prefers-reduced-motion: no-preference) {
  .tool-card:focus-visible,
  .category-link:focus-visible,
  .card-action:focus-visible,
  .theme-toggle:focus-visible,
  .sidebar-toggle:focus-visible,
  .search-input:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
  }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  .tool-card:hover {
    transform: none;
  }
  
  .tool-card:active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
  }
  
  .category-link:hover {
    background: transparent;
  }
  
  .category-link:active {
    background: var(--bg-hover);
  }
  
  /* 增加触摸目标尺寸 */
  .theme-toggle,
  .sidebar-toggle,
  .view-btn {
    min-width: 44px;
    min-height: 44px;
  }
}

/* 可折叠设备适配 */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
  .sidebar {
    width: 200px;
  }
  
  .main-container {
    grid-template-columns: 200px 1fr;
  }
}

/* 极小屏幕适配 (320px) */
@media (max-width: 320px) {
  :root {
    --sidebar-width: 240px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
  }
  
  .brand-icon {
    font-size: 1.3rem;
  }
  
  .search-container {
    padding: 6px var(--spacing-sm);
  }
  
  .search-input {
    font-size: 0.9rem;
  }
  
  .page-title h1 {
    font-size: 1.2rem;
  }
  
  .tool-card {
    padding: var(--spacing-sm);
  }
  
  .card-icon {
    width: 44px;
    height: 44px;
  }
  
  .card-icon i {
    font-size: 1.2rem;
  }
}