body{
    font-family: sans-serif;
    color: black;
} /* maybe break this down further? */
.pgheading{
    height: 160px;
    padding-bottom: 10px;
    display: flex;
    align-items: center;
}
.logo{
    width: 200px;
    height: 150px;
}
.pgtitle{
    text-align: center;
    font-size: 50px;
    width: 1200px;
    padding: 41.4px;
    border: 5px solid black;
    margin-left: 10px;
}
.maincontent{
    height: 500;
    width: 170px;
    display: flex;
    align-items: center;
}
.menubar{
    border: 3px solid black;
    padding-top: 5px;
    margin-right: 10px;
    width: 194px;
    height: 489px;
    background: lawngreen;
}
.menubar a{
    text-decoration: none;
    color: black;
    padding-top: 5px;
    padding-right: 35px; 
    padding-left: 35px;
    font-size: 40px;
}
.mainimg{
    width: 1295px;
}
.pgcontent{
    align-content: center;
}
.fullconcept{
    display: flex;
    align-items: center;
    width: 1000px;
    padding-left: 300px;
}
.caption{
    width: 300px;
    height: 300px;
    border: 3px solid black;
    padding: 10px;
}
.conceptimg{
    padding: 30px;
    width: 450px;
    height: 500px;
    margin: 10px;
}
.storyimg{
    text-align: center;
    padding: 10px;
}
<style>
.zoom {
    padding: 50px;
    transition: transform .2s; /* Animation */
    width: 200px;
    height: 200px;
    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) */
}
</style>

<div id = "zoom"></div>