.slides {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  .slides img {
    max-width: 500px;
    display: none;
    border-radius: 10px;
  }

  .slides img.active {
    display: block;
  }

  /* Bullets */
  .bullets {
    text-align: center;
    margin-top: 10px;
  }

  .bullets span {
    display: inline-block;
    width: 30px;
    height: 30px;
    line-height: 30px;
    margin: 5px;
    border-radius: 50%;
    background: #ddd;
    cursor: pointer;
    font-weight: bold;
  }

  .bullets span.active {
    background: #333;
    color: #fff;
  }
  
  
    @media (max-width: 768px) {
    .slides img {  max-width: 200px; }
    }