body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(to right, #74ebd5, #9face6);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.calculator {
    background: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    width: 350px;
    text-align: center;
}

.calculator h1 {
    color: #333333;
    font-size: 24px;
    margin-bottom: 20px;
}

.calculator label {
    display: block;
    margin: 10px 0 5px;
    font-size: 14px;
    color: #555555;
}

.calculator input, .calculator select {
    width: 80%;
    padding: 10px;
    margin: 5px 0;
    border: 1px solid #dddddd;
    border-radius: 5px;
    font-size: 16px;
}

.calculator button {
    padding: 10px 20px;
    font-size: 16px;
    color: #ffffff;
    background-color: #4caf50;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.calculator button:hover {
    background-color: #45a049;
}

.result {
    margin-top: 20px;
    font-size: 18px;
    color: #555555;
}