html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}


/*custom css*/

.card-buttons {
    opacity: 0;
    transition: ease-in-out opacity 0.2s;
}

.card-image:hover + .card-buttons,
.card-buttons:hover {
    opacity: 1;
}

/*Zoom out and in*/
#overlay {
    border: 1px solid black;  
    height: 300px;
    display: inline-block;    
    background-repeat: no-repeat;
}
.zoom {
    transition: transform .2s; /* Animation */   
    margin: 0 auto;
}

.zoom:hover {
        transform: scale(1.5); /* (150% zoom - Note: if the zoom is too large, it will go outside of the viewport) */
    }