ai.css

.ai-buttons {
  display: block;
  height: 42px;
  padding: 0 24px;
  background: #8f7a66;
  color: #f9f6f2;
  border-radius: 3px;
  text-decoration: none;
  line-height: 42px;
  text-align: center;
  float: right;
  margin-left: 24px;
}

.ai-menu:after {
  content: "";
  display: block;
  clear: both;
}

@media screen and (max-width: 520px) {
  .ai-buttons {
    width: 135px;
    padding: 0;
    display: block;
    box-sizing: border-box;
    margin-top: 2px;
    margin-left: 10px;
    margin-right: 0;
  }

  .ai-buttons:last-child {
    margin-left: 0;
  }

  .game-intro {
    display: none;
  }
}