style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #FF6FD8, #38B6FF);

}



.calculator {
    background: linear-gradient(135deg, #3F51B5 0%, #2196F3 100%);
    /* Gradient for the calculator body from deep indigo to vibrant blue */
    border-radius: 20px;
    box-shadow: 0px 8px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.display {
    width: 100%;
    height: 60px;
    border: none;
    border-radius: 10px;
    margin-bottom: 20px;
    background-color: #ffffff;
    font-size: 2rem;
    color: #333;
    text-align: right;
    padding: 0 15px;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.key {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

button {
    height: 60px;
    border: none;
    border-radius: 10px;
    background-color: #333;
    color: #ffffff;
    font-size: 1.5rem;
    transition: background-color 0.3s ease, transform 0.2s;
    cursor: pointer;

}

button:hover {
    background-color: #FF6E40;
    transform: scale(1.05); /* Slightly enlarges the button on hover */
}

button.operator {
    background-color: #42E695;
}

button.operator:hover {
    background-color: #32C77A;
}

button.clear {
    background-color: #FF5370;
}

button.clear:hover {
    background-color: #FF1744;
}

button.equals {
    background-color: #7C4DFF;
    grid-column: span 2;
}

button.equals:hover {
    background-color: #651FFF;
}

@media (min-width: 768px) {
    .calculator {
        width: 60%;
    }
}