a {
  color: #444444;
}
a:visited { 
  columns: #444444;; 
  text-decoration:none; 
} 
@media screen and (max-width: 3000px) {
  .m-list {
    margin: 0;
    display: inline-block;
    vertical-align: middle;
  }
  .m-list li {
    float: left;
    list-style: none;
    font-size: 16px;
    padding-top: 10px;
    padding-left: 20px;
  }
  .login-btn {
    border-color: #444444;
    border: 1px solid #444444;
    font-size: 13px;
    border-radius: 20px;
    padding: 3px 10px;
    text-decoration: none;
  }
}
@media screen and (max-width: 500px) {
  .m-list {
    display: none;
  }
  .login-btn {
    display: none;
    border-color: #444444;
    border: 1px solid #444444;
    font-size: 13px;
    border-radius: 20px;
    padding: 3px 10px;
    text-decoration: none;
  }
}