Use pseudo-elementos para as setas indicadoras de foco

.myElement{
  /* ( For pseudo-element to display next to element)*/
  display: inline-block;
}

.myElement::before {
 /* ( for off state)*/
  display: none;
 /*( pseudo-elements wont show without this)*/
  content: '';

  /*( w & h are zero to use border thickness for construction )*/
  width: 0; 
  height: 0;
  border-left: 10px solid transparent;
  border-top: 10px solid red;
  border-right: 10px solid transparent;

  /*(Pos: Absolute to prevent "hover kick" of shifting inline elements)*/
  position: absolute;
  top: 0;
  left: -10px;
}

.myElement:hover::before{
  display: inline-block;
}