/* TOP¹öÆ° ½ÃÀÛ */
/* https://rgy0409.tistory.com */
#topBtn {
    display: none;
    position: fixed;
    bottom: 10px;
    right: 10px;
    width: 50px;
    height: 50px;
    border: 1px solid #fff;
    color: #fff;
    text-align: center;
    line-height: 50px;
    border-radius: 10px;
    background-color: #555; /*¹öÆ° »ö»ó*/
    transition: background 0.2s;
    cursor: pointer;
}

#topBtn:hover {
    background-color: #f00; /*¸¶¿ì½º ¿Ã·ÈÀ» ¶§ ¹öÆ° »ö»ó*/
}
/* TOP¹öÆ° ³¡ */