/* 单词高亮样式 */
.word-lookup-popup {
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.word-lookup-popup:hover {
  background: #dbeafe;
}

.dark .word-lookup-popup:hover {
  background: #1e3a8a;
}

.word-lookup-popup:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.15);
}

.dark .word-lookup-popup:hover {
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

.word-lookup-popup:hover::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: #3b82f6;
  border-radius: 1px;
  transition: width 0.2s ease;
}