https://flukeout.github.io/ CSS DinerA fun game to help you learn and practice CSS selectors.flukeout.github.io #idA B(부모 자식)#id AA.class1~4 종합A,B*(전부다)A *(A의 모든것)A + B(인접 형제 결합자)A ~ B(일반 형제 결합자)A > B(직계 자손 선택):first-childonly Child:last-child:nth-child(n):nth-last-child(n):first-of-type:nth-of-type(A):nth-of-type(An+B):only-of-type:last-of-type:empty:not(A)[attribute]A[attribute][attribute="val..