body{
    color: black;
    background-color: white;
    margin: 0;
    padding:0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator{
    height: 480px;
    width: 320px;
    background-color: black;
    border-radius: 15px;
    border: 10px solid gray;
    padding: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
 
    
}

.screen{
    height: 110px;
    width: 98%;
    background-color:beige;
    overflow: hidden;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align:center;
    
}

.btns{
    height: 360px;
    width: 90%;
    background-color:black;
    border-radius: 5px;
    display: grid;
   grid-template-columns: repeat(4,1fr);
   gap: 10px;
   padding: 15px;

}

button{

    height: 60px;
    width: 60px;
    border-radius: 50%;
    font-size: 20px;
    border: none;
    background-color: orange;
    
   

}

button:hover{
    border: 2px gray solid;
}

.ent,.add{
    grid-row: span 2;
    height: 130px;
    border-radius: 10px;
}

input{
    background-color: beige;
    outline: none;
    border: none;
    width: 100%;
    height: 100%;
    text-align: center;
    font-size: 25px;
   
}