.sth-btn{
    padding:8px 12px;
    background:#222;
    color:#fff;
    text-decoration:none;
    display:inline-block;
    border-radius:4px;
}
.sth-login input{
    padding:6px;
    margin-right:6px;
}
.sth-login{margin:8px 0;}
#sth-login-msg{margin-top:8px;color:#333;font-size:14px;}