*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #ecf0f3;
    font-family: sans-serif;
    outline: none;
}

.container{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator{
    background-color: #ecf0f3;
    padding: 15px;
    border-radius: 30px;
    box-shadow: inset 5px 5px 12px #ffffff
                      5px 5px 12px rgba(0,0,0,.16);
    display: grid;
    grid-template-columns: repeat(4,68px);                  
}

input{
    grid-column: span 4;
    height: 70px;
    width: 260px;
    background-color: #ecf0f3;
    box-shadow: inset -5px -5px 12px
                inset  5px  5px 12px rgba(0,0,0,.16)  ;

     color: rgb(70, 70, 70);
     font-size: 50px;
     text-align: end;
     margin: auto;
     margin-top: 40px;   
     margin-bottom: 30px;
     padding: 20px;
} 

button{
    height: 48px;
    width: 48px;
    background-color: #ecf0fe;
    box-shadow: -5px -5px 12px #ffffff
                 5px  5px 12px rgba(0,0,0,.16);
                 border: none;
                 border-radius: 50%;
                 margin: 8px;
                 font-size: 16px;
}

.ecual{
    width: 115px;
    border-radius: 40px;
    background-color: #ecf0fe;
    box-shadow: -5px -5px 12px #ffffff
                 5px  5px 12px rgba(0,0,0,.16);
}