#slider{
  position: relative;
  height: 500px;
  overflow: hidden;
}
#slider .card{
  position: absolute;
  width: 800px;
  margin-left: 50px;
}
#slider .card h3{
  display: block;
  text-align: center;
  font-size: 30px;
}

#slider .card img{
  height: 350px;
  margin: 0px auto;
  display: block;
}

#slider .card .info{
  display: block;
  text-align: center;
  font-size: 18px;
  margin-top: 10px;
}

#card2, #card3, #card4{
  right: -100%;
}
@media screen and (max-width:800px) {
  #slider .card img{
    max-width: 100%;
    max-height: 350px;
    height: auto;
    margin: 0px auto;
    display: block;
  }
  #slider{
    position: relative;
    height: 500px;
  }
  #slider .card{
    position: absolute;
    width: 100%;
    margin-left: 0px;
    padding: 0px 10px;
    box-sizing: border-box;
  }
}