body {
    font-family: 'Roboto', Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #e6ecef;
    color: #2c3e50;
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: #1a2632;
    color: #e6ecef;
    text-align: center;
    padding: 2rem;
    border-bottom: 4px solid #4a7c59;
}

nav {
    background-color: #2c3e50;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin: 0;
}

nav li {
    margin: 0 1.5rem;
}

nav a {
    color: #e6ecef;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
}

nav a:hover {
    color: #4a7c59;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 3rem;
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #1a2632;
}

h1 {
    font-size: 2.5rem;
    margin: 0;
}

h2 {
    font-size: 1.8rem;
    border-bottom: 2px solid #4a7c59;
    padding-bottom: 0.5rem;
}

p, li {
    font-size: 1.1rem;
}

ul {
    padding-left: 1.5rem;
}

ul li {
    margin-bottom: 1rem;
}

.section-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5rem auto;
    border-radius: 8px;
    border: 1px solid #4a7c59;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.image-grid img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 1px solid #4a7c59;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #1a2632;
    color: #e6ecef;
    border-top: 4px solid #4a7c59;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #12181e;
        color: #e6ecef;
    }
    
    section {
        background-color: #1e262e;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    
    h1, h2 {
        color: #e6ecef;
    }
    
    h2 {
        border-bottom-color: #4a7c59;
    }
    
    .section-image, .image-grid img {
        border-color: #4a7c59;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 0.75rem 0;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    section {
        padding: 1.5rem;
    }
}