a img {
border-bottom-color: currentColor;
border-bottom-style: none;
border-bottom-width: medium;
border-left-color: currentColor;
border-left-style: none;
border-left-width: medium;
border-right-color: currentColor;
border-right-style: none;
border-right-width: medium;
border-top-color: currentColor;
border-top-style: none;
border-top-width: medium;
}