body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

.downloader {
    text-align: center;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease-in-out;
}

.downloader input {
    width: 80%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.downloader button {
    padding: 10px 20px;
    background: #28a745;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.downloader button:hover {
    background: #218838;
}

.hidden {
    display: none;
}

#message {
    margin-top: 10px;
    color: #d9534f;
}

section {
    padding: 20px;
    margin: 10px;
    background: #fff;
    border-radius: 5px;
}

footer {
    text-align: center;
    padding: 10px 0;
    background: #333;
    color: #fff;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}