.resize-handle {
  width: 8px;
  height: 100%;
  cursor: col-resize;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  transition: all 0.2s ease;
  user-select: none;
  flex-shrink: 0;
}

.resize-handle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.resize-handle--dragging {
  background: rgba(255, 255, 255, 0.2);
}

.resize-handle-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(-50%);
  transition: all 0.2s ease;
}

.resize-handle:hover .resize-handle-line {
  background: rgba(255, 255, 255, 0.4);
  width: 2px;
}

.resize-handle--dragging .resize-handle-line {
  background: rgba(255, 255, 255, 0.6);
  width: 2px;
}

.resize-handle-grip {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.resize-handle:hover .resize-handle-grip {
  opacity: 1;
}

.resize-handle--dragging .resize-handle-grip {
  opacity: 1;
}

.resize-handle-dot {
  width: 2px;
  height: 2px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  flex-shrink: 0;
}

.resize-handle:hover .resize-handle-dot {
  background: rgba(255, 255, 255, 0.8);
}

.resize-handle--dragging .resize-handle-dot {
  background: rgba(255, 255, 255, 1);
}

/* 全局拖拽状态样式 */
body.resizing {
  cursor: col-resize !important;
  user-select: none !important;
}

body.resizing * {
  cursor: col-resize !important;
  user-select: none !important;
}

/* 响应式设计 - 在小屏幕上隐藏 */
@media (max-width: 1024px) {
  .resize-handle {
    display: none;
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  .resize-handle-line {
    background: rgba(255, 255, 255, 0.8);
  }
  
  .resize-handle:hover .resize-handle-line {
    background: rgba(255, 255, 255, 1);
  }
  
  .resize-handle-dot {
    background: rgba(255, 255, 255, 0.9);
  }
}

/* 减少动画的用户偏好支持 */
@media (prefers-reduced-motion: reduce) {
  .resize-handle,
  .resize-handle-line,
  .resize-handle-grip {
    transition: none;
  }
}