body{
    margin:0;
    background-color: rgb(102, 102, 146);
}
#container{
    display:flex;
    flex-wrap: wrap;
    margin: 0 auto;
    padding: 30px;
    background-color: rgb(252, 252, 252);
}
.square{
    width: 100px;
    height: 100px;
    background-color: rgb(148, 91, 91);
    margin: 10px 10px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-family: Arial, Helvetica, sans-serif;
}

.primeNumber{
    background-color: rgba(16, 163, 72, 0.938);
    color: white;
}

.nonPrime {
    background-color: rgb(189, 189, 189);
    color:rgb(95, 95, 95);
    position: relative;
}

.nonPrime:after {
    content: '';
    height: 60px;
    border-left: 10px solid rgb(0, 0, 0);
    position: absolute;
    transform: rotate(45deg);
    left: 48px;
}

.nonPrime:before {
    content: '';
    height: 60px;
    border-left: 10px solid rgb(0, 0, 0);
    position: absolute;
    transform: rotate(-45deg);
    left: 48px;
}
.current {
    background-color: orange;
}

.currentMarked {
    background-color: rgb(255, 212, 212);
}
#header{
    text-align: center;
    font-size: x-large;
    padding: 20px 20px;

    color:white;
    font-family: Arial, Helvetica, sans-serif;
    background-color: rgb(102, 102, 146);
}

input{
padding: 10px 30px;
width: 30%;
font-size: x-large;
outline: none;
}

button{
    display: block;
    margin: 20px auto 0;
    font-size: x-large;
    padding: 10px 30px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    background:rgb(209, 209, 207);
    color: white;
    outline: none;
}

button:hover{
    background: orange;
}