html, body {
  margin: 0;
  padding: 0;
  border: 0;
}
body {
  background-color: #fff; 
}
#main {
  width: 100%;
  max-width: 1000px;
  background-color:#fff;
  margin: 2em auto;
  padding: 1em;
}
img.logo {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-top: 300px;
}