body {
  background-image: url(bg.jpg);
  background-size: cover;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  margin: 0;
  padding: 20px;
  box-sizing: border-box;
}

p {
  border-top: 1px solid #000;
  text-align: center;
  padding-top: 40px;
  font-size: 40px;
}

img {
  max-width: 100%;
  display: block;
}