body {
  font-family: Helvetica, Arial, sans-serif;
  line-height: 1.5;
  background-color: #ebeef0;
  color: #30373b;
}

h1 {
  color: #7ab55c;
  border-bottom: 5px solid black;
}

h2 {
  color: #329cda;
}

main {
  max-width: 750px;
  margin: auto;
}

img {
  width: 100%;
  display: none;
}

footer {
  margin-top: 120px;
  text-align: center;
  background-color: #30373b;
  color: white;
  padding: 20px;
}

@media screen and (min-width: 500px) {
  body {
    background-color: white;
  }

  img {
    display: block;
  }
}