:root {
    --primary-color: #1c1c1c;
    --secondary-color: #3baf3c;
    --text-color: #ffffff;
    --bg-color: #f9f9f9;
    --dark-bg: #121212;
    --dark-text: #e0e0e0;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--dark-bg);
        color: var(--dark-text);
    }
    header, footer {
        background-color: #1a1a1a;
    }
} 

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: #2e2e2e;
}

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

header h1 a {
    color: white;
    text-decoration: none;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    background-color: var(--secondary-color);
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 0.5rem;
    display: inline-block;
}

main {
    padding: 2rem;
    max-width: 960px;
    margin: auto;
    background: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    margin-bottom: 4rem;
}

footer {
    background-color: var(--primary-color);
    color: var(--text-color);
    text-align: center;
    padding: 1rem;
    position: fixed;
    width: 100%;
    bottom: 0;
}