/* styles.css */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #e0f7fa;
    font-family: 'Arial', sans-serif;
}

.calculator {
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.2);
    padding: 20px;
    width: 350px;
}

#display {
    width: 93%;
    height: 50px;
    font-size: 24px;
    text-align: right;
    margin-bottom: 15px;
    padding: 10px;
    border: 2px solid #00796b;
    border-radius: 10px;
    background-color: #e0f2f1;
}

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

button {
    height: 60px;
    font-size: 20px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

.btn {
    background-color: #4db6ac;
    color: black;
}

.btn.operator {
    background-color: #ff7043;
}

.btn.func {
    background-color: #64b5f6;
}

button:hover {
    transform: scale(1.05);
}

button:active {
    transform: scale(0.95);
}