/* ============================================================
   style.css — Emoji 词典 3.0 全局样式
   包含：主题变量、页面背景、组件样式、交互效果
   ============================================================ */

/* ========== 模块一：CSS 变量 — 深色主题（默认） ========== */
:root,
[data-theme="dark"] {
  color-scheme: dark;
  --color-canvas: #0a0b0f;
  --color-surface: #14151c;
  --color-elevated: #1e2029;
  --color-line: #2a2d38;
  --color-line-strong: #3a3d4a;
  --color-ink: #f2f4f8;
  --color-ink-soft: #9aa0ae;
  --color-ink-faint: #5c6170;
  --color-primary: #0055cc;
  --color-primary-hover: #007aff;
  --color-success: #2be08c;
  --color-warning: #f5d547;
  --color-info: #007aff;
  --color-danger: #ff3a5c;

  --color-canvas-rgb: 10 11 15;
  --color-surface-rgb: 20 21 28;
  --color-elevated-rgb: 30 32 41;
  --color-primary-rgb: 91 107 255;

  --shadow-drawer: 8px 8px 40px rgba(0, 0, 0, 0.6);

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;

  --toggle-bg: #1e2029;
  --toggle-border: #2a2d38;

  --tooltip-bg: rgb(30 32 41 / 0.96);
  --tooltip-border: var(--color-line);
  --tooltip-text: var(--color-ink-soft);
}

/* ========== 模块二：CSS 变量 — 浅色主题（Apple 风格） ========== */
[data-theme="light"] {
  color-scheme: light;
  --color-canvas: #f5f5f7;
  --color-surface: #ffffff;
  --color-elevated: #f0f0f2;
  --color-line: #e5e5ea;
  --color-line-strong: #d1d1d6;
  --color-ink: #1d1d1f;
  --color-ink-soft: #6e6e73;
  --color-ink-faint: #aeaeb2;
  --color-info: #007aff;
  --color-primary: #0055cc;
  --color-primary-hover: #007aff;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-danger: #ff3b30;

  --color-canvas-rgb: 245 245 247;
  --color-surface-rgb: 255 255 255;
  --color-elevated-rgb: 240 240 242;
  --color-primary-rgb: 0 122 255;

  --shadow-drawer: 0 4px 24px rgba(0, 0, 0, 0.08);

  --toggle-bg: #f0f0f2;
  --toggle-border: #e5e5ea;

  --tooltip-bg: rgb(255 255 255 / 0.96);
  --tooltip-border: var(--color-line);
  --tooltip-text: var(--color-ink-soft);
}

/* ========== 模块三：页面主体背景 ==========
   通过双层伪元素交叉淡入实现渐变丝滑过渡 */
body {
  background-color: var(--color-canvas);
  transition: background-color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  will-change: opacity;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色渐变层 */
body::before {
  background: radial-gradient(1200px 700px at 80% -10%, rgba(91, 107, 255, 0.1), transparent 60%), radial-gradient(900px 600px at -10% 30%, rgba(61, 215, 229, 0.06), transparent 60%);
  opacity: 1;
}

/* 浅色渐变层 */
body::after {
  background: radial-gradient(1200px 700px at 80% -10%, rgba(0, 122, 255, 0.05), transparent 60%), radial-gradient(900px 600px at -10% 30%, rgba(90, 200, 250, 0.04), transparent 60%);
  opacity: 0;
}

[data-theme="light"] body::before {
  opacity: 0;
}
[data-theme="light"] body::after {
  opacity: 1;
}

/* ========== 模块四：文本选区色 ========== */
::selection {
  background-color: rgb(var(--color-primary-rgb) / 0.12);
  color: var(--color-ink);
}

/* ========== 模块五：顶部 Header 半透明毛玻璃背景 ========== */
header {
  background-color: rgb(var(--color-canvas-rgb) / 0.72);
}

/* ========== 模块六：桌面端侧边栏背景 ========== */
aside.page-nav {
  background-color: rgb(var(--color-canvas-rgb) / 0.82);
}

/* ========== 模块七：移动端抽屉背景 ========== */
#mobile-nav-drawer {
  background-color: rgb(var(--color-surface-rgb) / 0.97);
}

/* ========== 模块八：主题切换按钮 ========== */
#theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--toggle-border);
  background: var(--toggle-bg);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  outline: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition:
    background-color 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.55s cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#theme-toggle:hover {
  box-shadow: 0 0 0 3px rgb(var(--color-primary-rgb) / 0.15);
}

#theme-toggle:active {
  transform: scale(0.92);
  transition: transform 0.1s cubic-bezier(0.4, 0, 0.2, 1);
}

#theme-toggle .icon-spin {
  display: inline-block;
  will-change: transform;
  backface-visibility: hidden;
}

@keyframes theme-icon-spin {
  0% {
    transform: rotate(0deg) scale(1);
  }
  50% {
    transform: rotate(180deg) scale(0.55);
  }
  100% {
    transform: rotate(360deg) scale(1);
  }
}

#theme-toggle .icon-spin.is-rotating {
  animation: theme-icon-spin 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== 模块九：主题切换过渡 ==========
   仅切换瞬间激活，通过 .theme-transitioning 类 + !important
   统一所有元素的过渡时长和曲线，消除"部分快部分慢"的不一致感。
   平时各元素保留自身交互动画，切换时强制统一。 */
.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
  transition:
    background-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    border-color 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    fill 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    stroke 0.6s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* 图标旋转使用 @keyframes 动画，不受颜色过渡影响 */
.theme-transitioning #theme-toggle .icon-spin {
  transition: none !important;
}

/* body 渐变层交叉淡入（常驻） */
body::before,
body::after {
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 抽屉/遮罩保留各自交互动画 */
#mobile-nav-drawer {
  transition:
    transform 300ms cubic-bezier(0.22, 1, 0.36, 1),
    background-color 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

#mobile-nav-overlay {
  transition: opacity 250ms ease;
}

/* ========== 模块十：Emoji 卡片悬停背景（深浅主题统一） ========== */
.emoji-card:hover {
  background: linear-gradient(90deg, #007aff, #0055cc) !important;
}

/* 悬停时卡片内所有文字统一为纯白色 */
.emoji-card:hover,
.emoji-card:hover span {
  color: #fff !important;
}

/* ========== 模块十一：主题色淡背景 ==========
   替代 Tailwind bg-primary/10，因 CSS 变量不支持透明度修饰符 */
.bg-primary-tint {
  background: rgb(var(--color-primary-rgb) / 0.1);
}

/* ========== 模块十二：标题字体 ========== */
/* 品牌名称 + 所有 h2 统一使用宋体系 */
.brand,
h2 {
  font-family: "Noto Serif SC", "Times New Roman", Times, ui-serif, Georgia, serif !important;
  font-weight: 700;
}

.sidebar-item.active {
  color: #fff;
  background: linear-gradient(to right, var(--color-info), var(--color-primary));
}

/* ========== 模块十三：移动端遮罩层 ==========
   由 JS 切换 .is-visible / .is-open 控制显隐与淡入
   .is-visible : 元素进入 DOM 渲染层（display:block）
   .is-open    : 触发 opacity 过渡，实现淡入效果 */
#mobile-nav-overlay {
  display: none;
  opacity: 0;
  transition: opacity 250ms ease;
}

#mobile-nav-overlay.is-visible {
  display: block;
}

#mobile-nav-overlay.is-open {
  opacity: 1;
}

/* ========== 模块十四：移动端抽屉 ==========
   由 JS 切换 .is-open 控制滑入/滑出
   使用 translateX(-100%) 隐藏，translateX(0) 滑入
   过渡曲线 cubic-bezier(0.22, 1, 0.36, 1) 模拟自然减速 */
#mobile-nav-drawer {
  transform: translateX(-100%);
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

#mobile-nav-drawer.is-open {
  transform: translateX(0);
}

/* ========== 模块十五：抽屉滚动条 ========== */
/* Webkit 系浏览器（Chrome / Edge / Safari）滚动条样式 */
#mobile-nav-drawer::-webkit-scrollbar {
  width: 4px;
}

#mobile-nav-drawer::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 4px;
}

/* ========== 模块十六：Emoji 卡片交互 ========== */
/* 鼠标悬停时显示小手光标 */
.emoji-card {
  cursor: pointer;
  position: relative; /* 为复制反馈定位提供参照 */
  transition: transform 0.3s ease;
  transform-origin: center;
}

/* 卡片 hover 时：整体放大 1.5 倍 + 深色蓝紫渐变背景 */
.emoji-card:hover {
  transform: scale(1.2);
  z-index: 20;
  background: linear-gradient(90deg, #007aff, #0055cc) !important;
  border-color: rgba(139, 92, 246, 0.35) !important;
  /* 核心模糊 */
  backdrop-filter: blur(3px);
}

/* ========== 模块十七：复制成功反馈 ==========
   点击 emoji-card 后，卡片下方出现的绿色"已复制成功"提示
   通过 JS 动态插入 .copy-feedback 元素并切换 .show 类控制显隐 */
.copy-feedback {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: var(--color-success);
  color: #0a0b0f;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  z-index: 30;
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.copy-feedback.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ========== 模块十八：使用说明悬停提示框 ========== */
.help-wrap {
  position: relative;
}

.help-wrap::after {
  content: "";
  position: absolute;
  top: 100%;
  right: 0;
  width: 340px;
  max-width: 86vw;
  height: 14px;
  pointer-events: auto;
}

.help-tip {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 60;
  width: 340px;
  max-width: 86vw;
  padding: 16px 18px 14px;
  border: 1px solid var(--tooltip-border);
  border-radius: var(--radius-md);
  background: var(--tooltip-bg);
  color: var(--tooltip-text);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.38);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.98);
  pointer-events: none;
  transition:
    opacity 0.22s ease,
    transform 0.22s ease,
    visibility 0.22s;
  font-size: 13px;
  line-height: 1.6;
}

.help-wrap:hover .help-tip,
.help-wrap:focus-within .help-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.help-tip::before {
  content: "";
  position: absolute;
  top: -7px;
  right: 24px;
  width: 12px;
  height: 12px;
  border-top: 1px solid var(--tooltip-border);
  border-left: 1px solid var(--tooltip-border);
  background: var(--tooltip-bg);
  transform: rotate(45deg);
  border-top-left-radius: 3px;
}

.help-tip-title {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--tooltip-border);
  font-size: 15px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.2px;
}

.help-tip-list {
  margin: 0 0 10px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.help-tip-list li,
.help-tip-note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.help-tip-ic {
  flex: 0 0 auto;
  line-height: 1.6;
  font-size: 14px;
}

.help-tip-note {
  padding: 9px 11px;
  margin-bottom: 11px;
  border-radius: var(--radius-md);
  background: rgba(var(--color-primary-rgb) / 0.1);
  border: 1px solid var(--tooltip-border);
}

.help-tip-dl {
  padding-top: 10px;
  border-top: 1px dashed var(--tooltip-border);
  color: var(--tooltip-text);
}

.help-tip-dl a {
  color: var(--color-primary);
  font-weight: 700;
  word-break: break-all;
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--color-primary-rgb) / 0.4);
  transition:
    color 0.18s ease,
    border-color 0.18s ease;
}

.help-tip-dl a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: var(--color-primary-hover);
}

.help-tip b {
  font-weight: 700;
  color: var(--color-ink);
}

/* ========== 模块十九：搜索高亮 ========== */
.search-highlight {
  color: var(--color-primary);
  font-weight: 700;
}