Looking to hide the parts of the circle that extend beyond the shadowed container. Utilizing bootstrap-4 for this project.
body {
overflow: hidden;
}
.container {
margin-top: 5%;
width: 1200px;
height: 625px;
border-radius: 4px;
background-color: #fff;
overflow: hidden;
}
.bg {
position: absolute;
display: inline-block;
right: 10px;
top: 20px;
width: 30vw;
height: 30vw;
overflow: hidden;
}
<div class="container shadow-lg">
<div class="bg">
<svg class="head_bg1" viewBox="0 0 100 100">
<defs>
<linearGradient id="grad1" x1="0%" y1="0%" x2="100%" y2="0%">
<stop offset="0%" style="stop-color:#614385;stop-opacity:1"/>
<stop offset="100%" style="stop-color:#516395;stop-opacity:1"/>
</linearGradient>
</defs>
<circle cx="50" cy="50" r="50" fill="url(#grad1)"/>
</svg>
</div>
</div>
https://jsfiddle.net/djaspar/zr8eqL8j/
Final Outcome: