html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #e3e3e3;
  overflow: hidden;
}

.desktop-mobile-shell {
  width: 520px;
  height: 100vh;
  margin: 0 auto;
  background: #ffffff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.06), 0 12px 30px rgba(0, 0, 0, 0.16);
}

.desktop-mobile-frame {
  border: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: #ffffff;
}

@media (max-width: 600px) {
  .desktop-mobile-shell {
    width: 100%;
    box-shadow: none;
  }
}