body{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;

}
.screen {
    width: 224px;
    font-size: 40px;
    text-align: end;
    padding: 4px;
}

.calculator {
    padding: 20px;
    border-radius: 10px;

}
.buttons {
    width: 232px;
    display: flex;
    flex-wrap: wrap;

}
button {
    border: none;
    font-size: 40px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin: 4px;
}
button:hover {
    background-color: darkkhaki;
}
button:active {
    background-color: darkgrey;
}
.clear {
    width: 100%;
    border-radius: 24px;
}