/* override browser default */
html,
body {
  margin: 0;
  padding: 0;
}

/* use viewport-relative units to cover page fully */
body {
  height: 100vh;
  width: 100vw;
}

.container {
    width: 95%;
    margin: auto;
    padding: 10px;
}

.iFrame1{
    width: 870px;
    margin: auto;
    display:block; 
}