border 속성

border-width: 5px;
border-style: solid;, border-style: dashed;
border-color: #ff6a00;
border-top,border-botton,border-right,border-left
border-radius: 10px 10px 0 0<- 둥글게 처리

border: 5px solid #dddddde **한줄에 입력**