안녕하세요 하루에 3분
#t {
width:100px;
height:100px;
background:RGBA(0,0,0,0.3);
border:3px solid black;
position:absolute;
left:50px;
top:50px;
}
#c {
width:100px;
height:100px;
background:yellow;
border-radius: 30px;
border:3px dotted black;
position:absolute;
z-index:-1;
}
2020.07.20.