:root {
    --background-color: #f4f4f4;
    --text-color: #333;
    --header-footer-bg: #333;
    --header-footer-text: #fff;
    --hero-text-color: #fff;
}

.dark-mode {
    --background-color: #333;
    --text-color: #f4f4f4;
    --header-footer-bg: #222;
    --header-footer-text: #eee;
    --hero-text-color: #eee;
}

body {
    font-family: sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}

header {
    background-color: var(--header-footer-bg);
    color: var(--header-footer-text);
    padding: 1rem;
    text-align: center;
}

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

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

nav a {
    color: var(--header-footer-text);
    text-decoration: none;
}

.hero {
    background-image: url('https://images.unsplash.com/photo-1581009137052-c097d7a425f3?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
    background-size: cover;
    background-position: center;
    color: var(--hero-text-color);
    text-align: center;
    padding: 4rem 0;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-button {
    background-color: #e50914;
    color: #fff;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
}

section {
    padding: 2rem;
}

footer {
    background-color: var(--header-footer-bg);
    color: var(--header-footer-text);
    text-align: center;
    padding: 1rem;
}

@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 10px 0;
    }
}