body{
        margin: 0; /* Remove default margin */
    }
    iframe{      
        display: block;  /* iframes are inline by default */   
        height: 100vh;  /* Set height to 100% of the viewport height */   
        width: 100vw;  /* Set width to 100% of the viewport width */     
        border: none; /* Remove default border */
        background: lightyellow; /* Just for styling */
    }