.img-teal-blck, .img-teal-blck img { 
padding: 0; margin: 0; 
-moz-border-radius: 15px; border-radius: 15px; 
}

.img-teal-blck { margin: 25px auto; position: relative; text-align: center; }
.img-teal-blck img { border: 2px solid #18c0b4; position: relative; z-index: 2; }

.img-teal-blck:after {
position: absolute;
bottom: -5%;
right: -4%;
width: 65%;
height: 40%;
background: #18c0b4;
border: 2px #18c0b4 solid;
content: '';
z-index: 1;
-moz-border-radius: 15px;
border-radius: 15px;
margin: 0 0 0 -2%;
}

@media screen and (max-width: 1000px) { 
.img-teal-blck { max-width: 80%; width: fit-content; }
}