.calculator {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    padding: 20px;
    width: 300px;
}

.display {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    background-color: #222;
    color: #fff;
    font-size: 2em;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: right;
}

#pendingOperationScreen {
    font-size: 1rem;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.btn {
    background-color: #f1f1f1;
    border: none;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-size: 1.5rem;
}

.btn:hover {
    background-color: #ddd;
}

#clear {
    background-color: #ff6666;
    color: #fff;
}

#backspace {
    background-color: #ffcc66;
    color: #fff;
}

#equals {
    background-color: #66cc66;
    color: #fff;
    grid-column: span 2;
}
#button2 {
    background-color: #d3d3d3;
    border: 1px solid black;
    width: 450px;
}
