body{
    overflow: hidden;
}

.rule{
    position: absolute;
    z-index: 2;
}
.rule p{
    font-size: 1rem;
    text-align: left;
    line-height: 2rem;
}
.rule button{
    background-color: #F4F4F4;
    cursor: pointer;
}

.main{
    position: relative;
    z-index: 1;
    filter: blur(15px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

}

h1, h2, h4{
    text-align: center;
    margin: 0.5rem 0;
}
.btn_start{
    margin: 0.5rem 0rem;
    cursor: pointer;

}

.container{
    display: flex;
    justify-content: center; 
    align-items: center;
}

.box{
    display: grid;
    grid-template-columns: repeat(2,1fr);
    place-items: center;
    height: 500px;
    width: 500px;
    border: 2px solid black;
    background-color: #e5e5e5;
    border-radius: 10%;
}

.box1{
    height: 200px;
    width: 200px;
    border: 5px solid black;
    border-radius: 10%;
    cursor: pointer;
}

.box1:hover{
    box-shadow: 5px 5px 10px black;
}

#a {
    background-color: #FF6F61;
}

#b {
    background-color: #4A90E2;
}

#c {
    background-color: #F5A623;
}

#d {
    background-color: #7ED321;
}  

@media (max-width: 1000px){
    .box{
        height: 300px;
        width: 300px;
    }
    .box1{
        height: 100px;
        width: 100px;
    }
}

@media (max-width: 450px){
    h2{
        font-size: 1rem;;
    }
    h1{
        font-size: 1.5rem;
    }
}