body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
    margin: 0;
}

.calculator {
    padding: 30px;
    text-align: center;
    width: 500px;
}

h2 {
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: bold;
}

input {
    width: 90%;
    padding: 12px;
    margin: 10px 0;
    font-size: 18px;
    border: 2px solid #ccc;
    border-radius: 5px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    background-color: transparent;
}

.operations {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.operations label {
    display: flex;
    align-items: center;
    font-size: 18px;
    cursor: pointer;
}

.operations input {
    margin-right: 8px;
    width: auto;
    transform: scale(1.2);
}

h3 {
    margin-top: 20px;
    font-size: 22px;
    font-weight: bold;
}