Overleaf/services/web/frontend/stylesheets/app/editor/search.less

.ace_search {
  background-color: @gray-lightest;
  border: 1px solid @editor-border-color;
  border-top: 0 none;
  width: 350px;
  overflow: hidden;
  position: absolute;
  top: 0px;
  z-index: 99;
  white-space: normal;
  padding: @line-height-computed / 4;

  font-family: @font-family-sans-serif;

  a,
  button {
    i {
      pointer-events: none;
    }
  }

  .ace_searchbtn_close {
    position: absolute;
    top: 6px;
    right: 12px;
    color: @gray;
    &:hover {
      color: @gray-dark;
    }
  }

  .ace_search_form,
  .ace_replace_form {
    margin-bottom: @line-height-computed / 4;
    input {
      width: 210px;
      display: inline-block;
      vertical-align: middle;
    }
    .btn-group {
      display: inline-block;
    }
  }

  .ace_nomatch {
    input {
      border-color: @red;
    }
  }

  .ace_search_options {
    display: flex;
    justify-content: space-between;
  }

  .ace_search_counter {
    color: @editor-search-count-color;
    margin: auto 0;
  }
}
.ace_search.left {
  border-left: 0 none;
  border-radius: 0px 0px @border-radius-base 0px;
  left: 0;
}
.ace_search.right {
  border-radius: 0px 0px 0px @border-radius-base;
  border-right: 0 none;
  right: 0;
}