html{
    background-image: url(backround.jpg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
h1{
    background-image: url(title.jpg);
    padding-left: 30%;
    background-color:rgb(0, 0, 0) ;
    border: none;
    color: rgb(255, 255, 255);
    padding:3%;
    padding-left: 30%;
    padding-right: 30%;
    text-align:center;
    text-decoration: none;
    display: inline-block;
    font-size:200%;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 25px;
    border: 5px solid rgb(104, 101, 101);
    
}
h2{
    padding-left: 30%;
    background-image: url(title.jpg);
    border: none;
    color: white;
    padding:2%;
    text-align:center;
    text-decoration: none;
    display: inline-block;
    font-size:100%;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 25px;
}
.quiz1{
    padding-left: 43%;
}
h3{
    background-image: url(title.jpg);
    opacity: 90%;
    border: none;
    color: white;
    padding:2%;
    padding-left: 30%;
    padding-right: 30%;
    text-align:center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 50px;
    border-width: 5px;
    border-color: 5px black;
    padding-left: 40%;
    padding-right: 40%;
}
.op {
    font-family:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-image: url(title.jpg);
    background-color: black;
    border: none;
    color: rgb(255, 255, 255);
    padding: 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    
  }
  .op:hover{
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
  }
  .op1,.op2,.op3,.op4{
    border-radius: 12px;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
  }
  .op4:active,.op1:active,.op2:active,.op3:active{
    background-color: rgb(51, 88, 51);
  }