body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 50px;
    background-color: #f0f0f0;
}

header, footer {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo {
    width: 100px;
    height: auto;
}

header h1 {
    margin: 0;
    margin-bottom: 40px;
}

main {
    margin: 20px 0;
}

.form-container {
    background-color: white;
    border: 2px solid #4CAF50;
    padding: 20px;
    border-radius: 10px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

section {
    text-align: left;
    margin: 20px auto;
    max-width: 800px;
    padding: 20px;
}

section h2, section h3 {
    text-align: center;
}

section p, section ul, section ol {
    margin: 10px 0;
}

#download-form {
    margin: 0 auto;
}

input[type="url"], button {
    padding: 10px;
    margin: 10px 0;
    width: calc(100% - 20px);
    box-sizing: border-box;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

#thumbnail {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
}

#thumbnail-img {
    max-width: 100%;
    height: auto;
    display: none;
}

.separator {
    margin-bottom: 40px; 
}

footer p {
    margin: 20px 0 0;
}