* {
  padding: 0;
  margin: 0;
}

.end {
  width: 100vw;
  height: 100vh;
  background-image: url(../images/khisi-kai.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

@media (max-width:767px) {
  .end {
    background-image: url(../images/phone.jpg);
  }
}