body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}
.calculator {
    width: 250px;
    padding: 20px;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    text-align: center;
}
.display {
    width: 100%;
    height: 50px;
    text-align: right;
    font-size: 1.5em;
    margin-bottom: 10px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
}
.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}
button {
    padding: 15px;
    font-size: 1.2em;
    border: none;
    cursor: pointer;
    background: #e0e0e0;
    border-radius: 5px;
}
.operator {
    background-color: #f8a100;
    color: white;
}
.cleardisplay {
    width: 49%;
    margin-bottom: 10px;
    color: black;
}
.delete {
    width: 49%;
}
.equal {
    background-color: green;
    color: white;
}