* {
  box-sizing: border-box;
}

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

body {
  overflow: hidden;
  background: #ffffff;
  font-family: Arial, sans-serif;
}

.app-shell {
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

iframe {
  display: block;
  width: 100vw;
  height: 100vh;
  border: none;
  margin: 0;
  padding: 0;
  background: #ffffff;
}