html, body{
  height: 100%;
  margin: 0;
}

body {
  background-image: url("image/back.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  margin: 0;
  padding: 0;

}

header, footer {
  color: white;
  text-align: center;
  text-shadow: 0 0 55px rgba(0,0,0,0.7);
  margin-bottom: 2rem;
}

h1 {
  color: rgb(245, 242, 242);
}

a {
  color: #007acc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

main {
  color: white;
  max-width: 900px;
  margin: auto;
  background: rgb(43, 23, 53);
  padding: 2rem;
  border-radius: 8px;
}