style.css

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: "Poppins",sans-serif;
}

body{
    background-color: #FD4B11;
    display: flex;
    flex-direction: column;
    align-items: center;
}



.container{
    width: 350px;
    height: auto;
    margin: 0 auto;
    text-align: center;
    padding: 30px 0px;
    background-color: aliceblue;
    border-radius: 5px;
    margin: 0;
    position: absolute;
    top: 50%;
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
}

.calculator_wrapper h2{
   margin-bottom: 20px;
}



.calculator_wrapper button{
    height: 70px;
    width: 70px;
    background-color: rgb(255, 72, 0);
    border: none;
    color: #ffffff;
    font-size: 18px;
    border-radius: 2px;
    cursor: pointer;
    margin: 0 auto;
    /* margin: 15px; */
}


button.multiplay{
    font-size: 30px;
}


.button_wrapper{
    margin: auto;
    width: 90%;
    height: 190px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    flex-direction: column;
    column-count: 3;
}


button.last_btn{
    /* margin-right: 0px; */
}



#myList{
    list-style: none;
    width: 80%;
    height: 60px;
    border-radius: 5px;
    background-color:#222222;
    color: #ffffff;
    margin: 15px auto;
    text-align: left;
    padding: 10px 20px;
}



#myList li{
    margin: 10px 5px;
    font-size: 20px;
}




.calculator input{
    width: 80%;
    height: 50px;
    border-radius: 5px;
    margin: 10px 0px;
    border: 1px solid rgb(201, 201, 201);
    outline: none;
    padding: 10px;
    font-size: 15px;
}


input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}