.ace_gutter-cell.ace_error, .ace_gutter-cell.ace_warning {
  background: none;
  &:before {
    position: absolute;
    left: .1em;
    font-size: 1.5em;
  }
}
.ace_gutter-cell.ace_error:before {
  content: "×";
  color: tomato;
}
.ace_gutter-cell.ace_warning:before {
  content: "!";
  left: .5em;
  font-size: 1em;
  color: orange;
}
.ace_gutter {
  background: #000!important;
  color: #444!important;
}
.ace_gutter-active-line, .ace_active-line {
  background: #131313!important;
  color: #aaa;
}
.ace_scrollbar-h {
  overflow: hidden;
}