body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    width: 400px;
    text-align: center;
}

h1 {
    margin-bottom: 10px;
    color: #333;
}

p {
    margin-bottom: 20px;
    color: #666;
    font-size: 14px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input, select, button {
    padding: 10px;
    font-size: 16px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

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

#result {
    margin-top: 20px;
    font-weight: bold;
    color: #28a745;
}