// 聊天页面公共 mixins

// 响应式
@mixin respond-to($breakpoint) {
  @if $breakpoint == tablet {
    @media (max-width: 768px) {
      @content;
    }
  } @else if $breakpoint == mobile {
    @media (max-width: 480px) {
      @content;
    }
  }
}

// 弹性布局
@mixin flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

@mixin flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@mixin flex-column {
  display: flex;
  flex-direction: column;
}

// 文本省略
@mixin text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

// 多行文本省略
@mixin text-ellipsis-multi($lines: 2) {
  display: -webkit-box;
  -webkit-line-clamp: $lines;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

// 滚动按钮样式
@mixin scroll-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  @include flex-center;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: rgba(0, 0, 0, 0.4);
  background-color: #fff;
  font-size: 10px;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;

  &:hover {
    background-color: #f3f4f6;
    border-color: rgba(0, 0, 0, 0.15);
    color: rgba(0, 0, 0, 0.6);
  }
}

// 操作按钮样式
@mixin action-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  font-size: 13px;
  color: #555;
  background: transparent;
  border: none;
  border-radius: 4px;
  transition: all 0.2s ease;

  &:hover {
    color: #409eff;
    background: #f0f7ff;
  }

  &:active {
    background: #e6f2ff;
  }

  &[disabled] {
    color: #bbb;
    background: transparent;
  }

  .el-icon {
    font-size: 13px;
  }
}