*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #ecf0f3;
    outline: none;
    font-family: sans-serif;
   
}
.container{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.claulator{
    display: grid;
    padding: 15px;
    border-radius: 30px;
    overflow: hidden;
    background-color: #ecf0f3;
    box-shadow: inset 5px 5px 12px #fff,
                       5px 5px 12px rgba(0,0,0,0.16);
    
    grid-template-columns: repeat(4,68px);

}

input{
    grid-column: span 4;
    height: 90px;
    width: 260px;
    border: none;
    border-radius: 30px;
    font-size: 50px;
    text-align: end;
    padding: 1rem;
    margin-top: 40px;
    margin-bottom: 30px;
    background-color: #ecf0f3;
    box-shadow: inset -5px -5px 12px #fff,
                inset 5px 5px 12px rgba(0,0,0,0.16);
}
button{
    height: 50px;
    width: 50px;
    border: none;
    border-radius: 50%;
    background-color: #ecf0f3;
    box-shadow:  -5px -5px 12px #fff,
                    5px 5px 12px rgba(0,0,0,0.16);
    
    margin: 8px;
    font-size: 16px;

}
.equal{
    width: 115px;
    border-radius: 40px;
    background-color: #ecf0f3;
    box-shadow:  -5px -5px 12px #fff,
                    5px 5px 12px rgba(0,0,0,0.16); 
}