body {
    font-family: Arial, sans-serif;
    background-color: #f3f3f3;
    color: #333;
    padding: 2rem;
}

.container {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
    margin: auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

label {
    display: block;
    margin: 10px 0;
}

input, select {
    width: 100%;
    padding: 0.5rem;
    margin-top: 5px;
}

button {
    padding: 0.7rem 1.5rem;
    background-color: #2ecc71;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.result {
    margin-top: 20px;
    padding: 1rem;
    background-color: #dff0d8;
    color: #3c763d;
    border-radius: 5px;
}