body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f8ff;
    color: #333333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

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

h1 {
    margin-bottom: 20px;
    color: #4caf50;
}

.form-group {
    margin-bottom: 15px;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="number"] {
    width: 100%;
    padding: 8px;
    margin: 5px 0 10px 0;
    border: 1px solid #cccccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    background-color: #4caf50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.result {
    margin-top: 20px;
}

.result h2 {
    color: #4caf50;
}

.result p {
    font-size: 1.2em;
    font-weight: bold;
}