Calendar/wwwroot/css/test-nesting.css

.test-container{display:flex;padding:20px}.test-container .test-child{color:blue}:is(.test-container .test-child):hover{color:red}.active:is(.test-container .test-child){font-weight:700}.test-container .test-nested{margin:10px}:is(.test-container .test-nested) .deep-nested{font-size:14px}