body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #08abe6;
}

.calculator {
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 30px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 350px;
    height: 540px;
}

#display {
    width: calc(100% - 10px);
    margin-bottom: 10px;
    padding: 10px;
    font-size: 1.5rem;
    text-align: right;
    border: none;
    outline: none;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 5px;
}

button {
    padding: 15px;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    background-color: #eee;
}

button:hover {
    background-color: #ddd;
}

button:active {
    transform: translateY(1px);
}