body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #263daf, #15e334); /* Add gradient background */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    width: 100%;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.calculator {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 8px;
    font-weight: bold;
}

input {
    margin-bottom: 16px;
    padding: 10px;
    border: 1px solid #dddddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    padding: 10px;
    border: none;
    background-color: #007bff;
    color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    border-radius: 4px;
}

button:hover {
    background-color: #0056b3;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
}