body{
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
    display: flex;
    flex-direction: column;
    background:url(https://www.pixel4k.com/wp-content/uploads/2018/12/dark-abstract-amnesia-4k_1546277882.jpg.webp);
    background-position: center;
    background-size: cover;
}
@media only screen
and (min-device-width : 320px) and (max-device-width : 480px) {
  /* Styles */
  body{
    background: url(https://i.pinimg.com/564x/af/80/59/af805952c2deed17a3360ac3ec0bb7d4.jpg);
  }

#choices{
    width:90%;
    margin:0 auto;
    height:10vh;
}
#opp-choice,#your-choice{
    width:80%;
    height:auto;
    
}
h1{
    margin:0;
}
#choices img{
    width:30%;
    height:auto;
    margin:5px;
    
}}
body{
    display: flex;
    flex-direction: column;
    align-items:center;
}
.container{
    width:600px;
    height:98vh;
    background: rgba( 255, 255, 255, 0.25 );
box-shadow: 0 8px 32px 0 rgba( 31, 38, 135, 0.37 );
backdrop-filter: blur( 4px );
-webkit-backdrop-filter: blur( 4px );
border-radius: 10px;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
#opp-choice,#your-choice{
    width:25%;
    height:auto;
}
#choices{
    margin-top:10px;
    width:60%;
    background-color: rgb(161, 157, 157);
    box-shadow: rgba(50, 50, 93, 0.25) 0px 30px 60px -12px, rgba(0, 0, 0, 0.3) 0px 18px 36px -18px;}
#choices img{
    width:20%;
    height:auto
}