| <!DOCTYPE html> | |
| <style> | |
| .container { | |
| filter: drop-shadow(5px 5px 5px black); | |
| } | |
| .circle-mask { | |
| border-radius: 80px; | |
| overflow: hidden; | |
| width: 100px; | |
| height: 100px; | |
| } | |
| .green-box { | |
| width: 100px; | |
| height: 100px; | |
| background-color: green; | |
| } | |
| </style> | |
| <div class="container"> | |
| <div class="circle-mask"> | |
| <div class="green-box"></div> | |
| </div> | |
| </div> |