body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #98d9ed;
}

.calculator {
    width: 300px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.display {
    padding: 20px;
    background-color: #282c34;
    color: white;
}

.display input {
    width: 100%;
    font-size: 2rem;
    border: none;
    outline: none;
    box-shadow: -8px -8px 15px rgba (255, 255, 255, 0.1), 5px 5px 15px rgba(0, 0, 0, 0.2);
    background: transparent;
    color: #ffff;
    text-align: right;
}

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

button {
    padding: 20px;
    font-size: 1.5rem;
    border: none;
    outline: none;
    background-color: #f0f0f0;
    cursor: pointer;
    transition: background 0.3s;
}

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

button:nth-child(4n) {
    background-color: #ffa726;
    color: white;
}

button:nth-child(4n):hover {
    background-color: #fb8c00;
}