body {
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
    background: #f7fafc;
    color: #222;
    margin: 0;
    padding: 0;
}

#cta {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.07);
    margin: 2rem auto 1rem auto;
    max-width: 600px;
    padding: 2rem 2rem 1rem 2rem;
    text-align: center;
}

    #cta h1 {
        color: #4a90e2;
        font-size: 2.2rem;
        margin-bottom: 0.5rem;
    }

    #cta p {
        color: #555;
        font-size: 1.1rem;
        margin: 0.5rem 0;
    }

#demo {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    max-width: 600px;
    margin: 1rem auto 2rem auto;
    padding: 2rem;
    text-align: center;
}

input[type="file"] {
    display: block;
    margin: 1rem auto;
    font-size: 1rem;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    background: #f5f7fa;
}

button#uploadBtn {
    background: #4a90e2;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.7rem 2rem;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(74,144,226,0.08);
    transition: background 0.2s;
    margin-top: 1rem;
}

    button#uploadBtn:hover {
        background: #357ab8;
    }

pre#result {
    background: #f5f7fa;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1.5rem;
    font-size: 1rem;
    color: #333;
    max-width: 100%;
    overflow-x: auto;
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}