*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;

}
body{
    height: 100vh;
    background-color: aqua;
    display: flex;
    justify-content: center;
    align-items: center;
}
.calculator{
    width: 350px;
    border: 2px solid red;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    overflow: hidden;
    text-align: right;
}
.display{
    width: 100%;
    height: 120px;
    background: black;
    color: white;
}
.input{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
}
button{
    border: none;
    background-color: white;
    padding: 1.6rem;
    font-size: 22px;
}
button:hover{
    font-weight: bold;
}
.output{
    font-size: 28px;
    padding: 25px;
}
.result{
    font-size: 18px;
    padding: 25px;
    margin-top: -18px;
}
@keyframes big{
    0%{
        font-size: 18px;
    }
    100%{
        font-size: 30px;
    }
}
@keyframes small{
    0%{
        font-size: 28px;
    }
    100%{
        font-size: 18px;
    }
}
button:hover{
    background-color: brown;
}
.AC{
    background-color: rgb(43, 33, 156);
    color: white;
}