/**
 * 响应式 SVG 图标系统
 * 支持不同屏幕尺寸、设备分辨率和容器尺寸
 * 提供一致的图标显示体验
 */

/* ========================================
   1. 图标基础变量
   ======================================== */
:root {
  /* 基础图标尺寸 - 使用 em 单位实现响应式缩放 */
  --icon-size-base: 1rem;
  --icon-size-xs: 0.75rem;
  --icon-size-sm: 0.875rem;
  --icon-size-md: 1rem;
  --icon-size-lg: 1.25rem;
  --icon-size-xl: 1.5rem;
  --icon-size-2xl: 2rem;
  --icon-size-3xl: 2.5rem;

  /* 图标容器尺寸 (px) */
  --icon-container-xs: 16px;
  --icon-container-sm: 20px;
  --icon-container-md: 24px;
  --icon-container-lg: 32px;
  --icon-container-xl: 40px;
  --icon-container-2xl: 48px;
  --icon-container-3xl: 56px;

  /* 工具卡片图标尺寸 */
  --tool-icon-size: 48px;
  --tool-icon-size-sm: 42px;
  --tool-icon-size-lg: 56px;

  /* 分类导航图标尺寸 */
  --category-icon-size: 18px;
  --category-icon-size-sm: 14px;

  /* 头部图标尺寸 */
  --header-icon-size: 16px;
  --header-icon-size-sm: 14px;

  /* 工具栏图标尺寸 */
  --toolbar-icon-size: 15px;
  --toolbar-icon-size-sm: 12px;

  /* SVG viewBox 基础尺寸 */
  --svg-viewbox-base: 1024;
}

/* ========================================
   2. SVG 基础样式
   ======================================== */

/* 隐藏原始 SVG symbol 容器 */
svg[data-icon-svg] {
  display: none !important;
}

/* SVG 包装器基础样式 */
.svg-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

/* SVG 内部样式 */
.svg-icon-wrapper svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

/* SVG use 元素 - 继承 fill */
.svg-icon-wrapper use {
  fill: currentColor;
}

/* ========================================
   3. 工具卡片图标 (tool-card-icon)
   ======================================== */
.tool-card-icon {
  width: var(--tool-icon-size);
  height: var(--tool-icon-size);
  /*background: linear-gradient(135deg, var(--brand-primary, #2196F3), var(--status-success, #4CAF50));*/
  border-radius: 12px;
  display: inline-block;
  position: relative;
  color: white;
  flex-shrink: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.tool-card-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.tool-card-icon:hover::before {
  opacity: 1;
}

.tool-card-icon .tool-svg-icon {
  width: 100%;
  height: 100%;
  color: inherit;
  position: relative;
  z-index: 1;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tool-card-icon .tool-svg-icon svg {
  width: 100%;
  height: 100%;
  display: block;
  fill: currentColor;
}

.tool-card:hover .tool-card-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 6px 20px rgba(var(--brand-primary-rgb, 33, 150, 243), 0.4);
}

/* 响应式调整 */
@media (max-width: 1200px) {
  .tool-card-icon {
    width: var(--tool-icon-size-sm);
    height: var(--tool-icon-size-sm);
  }
  .tool-card-icon .tool-svg-icon {
    width: 100%;
    height: 100%;
    padding: 4px;
  }
}

@media (max-width: 768px) {
  .tool-card-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
  }
  .tool-card-icon .tool-svg-icon {
    width: 100%;
    height: 100%;
    padding: 4px;
  }
}

/* ========================================
   4. 分类导航图标 (category-icon-svg)
   ======================================== */
.nav-category .category-icon-svg {
  width: var(--category-icon-size);
  height: var(--category-icon-size);
  display: inline-block;
  position: relative;
  flex-shrink: 0;
}

.nav-category .category-icon-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.nav-category .category-icon-svg use {
  fill: currentColor;
}

/* 响应式调整 */
@media (max-width: 1024px) {
  .nav-category .category-icon-svg {
    width: var(--category-icon-size-sm);
    height: var(--category-icon-size-sm);
  }
}

@media (max-width: 768px) {
  .nav-category {
    padding: 10px 12px;
  }
  .nav-category .category-icon-svg {
    width: 12px;
    height: 12px;
  }
}

/* ========================================
   5. 头部区域图标 (header-icon)
   ======================================== */
.header-btn .header-icon {
  width: var(--header-icon-size);
  height: var(--header-icon-size);
  display: inline-block;
  position: relative;
}

.header-btn .header-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.header-btn .header-icon use {
  fill: currentColor;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .header-btn .header-icon {
    width: var(--header-icon-size-sm);
    height: var(--header-icon-size-sm);
  }
  .header-btn {
    width: 18px;
    height: 18px;
  }
}

/* ========================================
   6. 搜索框图标 (search-icon)
   ======================================== */
.search-box .search-icon {
  width: var(--header-icon-size);
  height: var(--header-icon-size);
  color: var(--text-secondary);
  display: inline-block;
  position: relative;
}

.search-box .search-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* 清除按钮图标 */
.search-box .clear-icon {
  width: 14px;
  height: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.2s;
  display: inline-block;
  position: relative;
}

.search-box .clear-icon:hover {
  color: var(--text-primary);
}

/* ========================================
   7. 主题切换图标 (theme-icon)
   ======================================== */
.header-btn .theme-icon {
  width: var(--header-icon-size);
  height: var(--header-icon-size);
  display: inline-block;
  position: relative;
  transition: transform 0.3s ease;
}

.header-btn .theme-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.header-btn:hover .theme-icon {
  /* 移除旋转动画，由theme.css中的动画处理 */
  transform: scale(1.1);
}

/* ========================================
   8. 工具栏按钮图标 (btn-icon)
   ======================================== */
.toolbar-btn .btn-icon {
  width: var(--toolbar-icon-size);
  height: var(--toolbar-icon-size);
  display: inline-block;
  position: relative;
}

.toolbar-btn .btn-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.toolbar-btn .btn-icon use {
  fill: currentColor;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .toolbar-btn .btn-icon {
    width: var(--toolbar-icon-size-sm);
    height: var(--toolbar-icon-size-sm);
  }
  .toolbar-btn {
    padding: 6px 10px;
  }
  .toolbar-btn .btn-text {
    display: none;
  }
}

/* ========================================
   9. 收藏/星标图标 (star-icon)
   ======================================== */
.star-icon {
  width: 14px;
  height: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  transition: transform 0.2s ease;
}

.star-icon svg {
  width: 100%;
  height: 100%;
}

.favorite-btn:hover .star-icon {
  transform: scale(1.2);
}

/* ========================================
   10. 心形图标 (heart-icon)
   ======================================== */
.heart-icon {
  width: var(--header-icon-size);
  height: var(--header-icon-size);
  color: #e74c3c;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
}

.heart-icon svg {
  width: 100%;
  height: 100%;
}

/* ========================================
   11. 侧边栏图标 (sidebar-icon)
   ======================================== */
.sidebar-icon {
  width: 15px;
  height: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
}

.sidebar-icon svg {
  width: 100%;
  height: 100%;
}

/* ========================================
   12. 徽章图标 (badge-icon)
   ======================================== */
.badge-icon {
  width: 14px;
  height: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
}

.badge-icon svg {
  width: 100%;
  height: 100%;
}

/* ========================================
   13. 关闭/分享图标 (close-icon)
   ======================================== */
.close-icon {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, transform 0.2s;
}

.close-icon:hover {
  color: var(--text-primary);
  transform: rotate(90deg);
}

.close-icon svg {
  width: 100%;
  height: 100%;
}

/* ========================================
   14. 通用 SVG 图标样式
   ======================================== */
.tool-svg-icon,
.header-icon,
.search-icon,
.clear-icon,
.theme-icon,
.btn-icon,
.close-icon,
.heart-icon,
.sidebar-icon,
.badge-icon,
.star-icon,
.category-icon-svg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary, #2196f3);
  flex-shrink: 0;
  vertical-align: middle;
  position: relative;
}

/* 确保 SVG 元素填满容器 */
.tool-svg-icon svg,
.header-icon svg,
.search-icon svg,
.clear-icon svg,
.theme-icon svg,
.btn-icon svg,
.close-icon svg,
.heart-icon svg,
.sidebar-icon svg,
.badge-icon svg,
.star-icon svg,
.category-icon-svg svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* use 元素继承 fill */
.tool-svg-icon use,
.header-icon use,
.search-icon use,
.clear-icon use,
.theme-icon use,
.btn-icon use,
.close-icon use,
.heart-icon use,
.sidebar-icon use,
.badge-icon use,
.star-icon use,
.category-icon-svg use {
  fill: currentColor;
}

/* ========================================
   15. 高 DPI / 视网膜屏幕适配
   ======================================== */
@media (-webkit-min-device-pixel-ratio: 2),
       (min-resolution: 192dpi) {
  .tool-card-icon .tool-svg-icon,
  .category-icon-svg {
    /* 提高清晰度 */
    shape-rendering: geometricPrecision;
  }
}

@media (-webkit-min-device-pixel-ratio: 3),
       (min-resolution: 288dpi) {
  .tool-card-icon .tool-svg-icon,
  .category-icon-svg {
    shape-rendering: geometricPrecision;
    /* 启用亚像素渲染 */
    render-intent: optimizeQuality;
  }
}

/* ========================================
   16. 响应式断点系统
   ======================================== */

/* 超大屏幕 (≥14 00px) */
@media (min-width: 1400px) {
  :root {
    --tool-icon-size: 56px;
    --category-icon-size: 20px;
    --header-icon-size: 18px;
  }
}

/* 大屏幕 (≥1200px) */
@media (min-width: 1200px) and (max-width: 1399px) {
  :root {
    --tool-icon-size: 52px;
    --category-icon-size: 19px;
    --header-icon-size: 17px;
  }
}

/* 中等屏幕 (≥992px) */
@media (min-width: 992px) and (max-width: 1199px) {
  :root {
    --tool-icon-size: 48px;
    --category-icon-size: 18px;
    --header-icon-size: 16px;
  }
}

/* 小屏幕 (≥768px) */
@media (min-width: 768px) and (max-width: 991px) {
  :root {
    --tool-icon-size: 44px;
    --category-icon-size: 16px;
    --header-icon-size: 15px;
  }
}

/* 手机 (≥576px) */
@media (min-width: 576px) and (max-width: 767px) {
  :root {
    --tool-icon-size: 40px;
    --category-icon-size: 14px;
    --header-icon-size: 14px;
    --toolbar-icon-size: 13px;
  }
}

/* 小手机 (<576px) */
@media (max-width: 575px) {
  :root {
    --tool-icon-size: 36px;
    --category-icon-size: 12px;
    --header-icon-size: 12px;
    --toolbar-icon-size: 12px;
  }

  .tool-card-icon {
    border-radius: 8px;
  }

  .nav-category {
    padding: 10px 12px;
  }
}

/* ========================================
   17. 触摸设备优化
   ======================================== */
@media (hover: none) and (pointer: coarse) {
  .tool-card-icon:active {
    transform: scale(0.95);
  }

  .header-btn:active {
    transform: scale(0.95);
  }

  .toolbar-btn:active {
    background: var(--bg-tertiary);
  }
}

/* ========================================
   18. 动画效果
   ======================================== */
@keyframes icon-pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes icon-bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-3px);
  }
}

.icon-animate-pulse {
  animation: icon-pulse 2s ease-in-out infinite;
}

.icon-animate-bounce {
  animation: icon-bounce 0.6s ease-in-out;
}

/* ========================================
   19. 图标加载状态
   ======================================== */
.icon-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 10px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 2px;
  color: white;
  font-size: 6px;
}

.icon-placeholder {
  background: var(--bg-tertiary);
  border-radius: 4px;
  display: inline-block;
}

/* SVG 加载时的占位动画 */
.svg-icon-wrapper.loading::after {
  content: '';
  position: absolute;
  width: 60%;
  height: 60%;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   20. 无障碍访问
   ======================================== */
.svg-icon-wrapper:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 降低动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
  .tool-card-icon,
  .header-btn .theme-icon,
  .close-icon,
  .favorite-btn .star-icon {
    transition: none;
  }

  .tool-card-icon:hover,
  .header-btn:hover .theme-icon {
    transform: none;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  .tool-card-icon {
    border: 2px solid currentColor;
  }

  .svg-icon-wrapper svg {
    stroke-width: 2px;
  }
}