* {
  box-sizing: border-box;
}

html {
  background: #e9ecef;
}

body {
  margin: 0;
  background: #e9ecef;
}

.document {
  width: min(100%, 1920px);
  margin: 0 auto;
  padding: 20px;
}

.page {
  margin: 0 0 20px;
  background: #fff;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.12);
}

.page:last-child {
  margin-bottom: 0;
}

.page img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 640px) {
  .document {
    padding: 0;
  }

  .page {
    margin-bottom: 8px;
    box-shadow: none;
  }
}