style.css

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

.display {
    width: 300px;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: space-between;
    border: solid black;
    margin: 10px;
    border-radius: 5px;
}

.result {
    font-size: 50px;
}

.input {
    font-size: 30px;
}

.function-buttons-section {
    width: 300px;
    height: 70px;
    display: flex;
    margin: 10px;
}

.function-buttons-section button{
    flex:1;
    margin: 10px;
    border: solid black;
    border-radius: 5px;
}

.clearButton {
    background-color: grey;
}

.delButton {
    background-color: grey;
}
.operand-and-operator {
    width: 300px;
    height: 300px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    margin: 10px;
}

.operand-and-operator button{
    width: 50px;
    height: 50px;
    margin: 10px;
    border: solid black;
    border-radius: 5px;
}

.calculator {
    background-color: rgb(190, 186, 186);
    border: solid black;
    border-radius: 5px;
}