#img {
  margin: auto;
  display: block;
  max-width: 70%;
  height: 28em;
  padding: 2em;
}

#btn1,
#btn2,
#btn3,
#btn4,
#btn5,
#btn6,
#btn7,
#btn8 {
  background-color: #845ec2;
  border: none;
  color: white;
  padding: 1em 2em;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 1em;
  margin: 4px 2px;
  transition-duration: 0.4s;
  cursor: pointer;
}
#btn1:hover,
#btn2:hover,
#btn3:hover,
#btn4:hover,
#btn5:hover,
#btn6:hover,
#btn7:hover,
#btn8:hover {
  background-color: white;
  color: #845ec2;
}
.center {
  display: flex;
  justify-content: center;
  align-items: center;
}

@media screen and (max-width: 1000px) {
  .center {
    float: left;
    display: block;
  }
  #img {
    display: block;
    max-width: 80%;
    height: 20em;
    padding: 1em;
  }
}

@media screen and (max-width: 600px) {
  #img {
    display: block;
    max-width: 100%;
    height: 15em;
    padding: 1em;
  }
}