상단부분이 로그인하면 2열로되는데 default.css어느부분을 수정하면될까요?

#tnb {border-bottom:1px solid #ddd;background:#fff}

#tnb h3 {position:absolute;font-size:0;line-height:0;overflow:hidden}

#tnb ul {margin:0 auto;zoom:1}

#tnb ul:after {display:block;visibility:hidden;clear:both;content:""}

#tnb li {float:right;border-left:1px solid #ddd;margin-bottom:-1px;font-size:0.92em}

#tnb a {display:inline-block;padding:0 10px;color:#646464;line-height:35px}

#tnb a:focus, #tnb a:hover {color:#253dbe;background:#fafafa}

#tnb .tnb_admin a{color:#ff0000;}

#tnb .tnb_left{float:left}

#tnb .tnb_left a{padding:0 14px}

#tnb .tnb_cart{border-right:1px solid #ddd;}

#tnb .tnb_community{border-right:1px solid #ddd}

#tnb .tnb_community i{font-size:15px}

#tnb .tnb_community{background:#e7e7e7;font-weight:bold;}

#tnb .tnb_community:focus, #tnb .tnb_community:hover {color:#333;border-bottom:0}

#tnb .tnb_community a{color:#253dbe;border-bottom:1px solid #e7e7e7}