body {
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333;
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

body.dark-mode {
    background-color: #333;
    color: #f9f9f9;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(to bottom, #ffffff, #f0f0f0);
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

.container.dark-mode {
    background: linear-gradient(to bottom, #444444, #555555);
}

header {
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav a {
    text-decoration: none;
    color: #007BFF;
}

section {
    margin: 20px 0;
}

.slideshow-container {
    position: relative;
    max-width: 100%;
    margin: auto;
}

.mySlides {
    display: none;
}

img {
    border-radius: 10px;
}

footer {
    text-align: center;
    margin-top: 20px;
}

footer.dark-mode {
    color: #f9f9f9;
}