/* Navigation styling */
header {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: #555;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

nav a:hover {
    color: #2563eb;
    background-color: #f0f7ff;
}

nav a.active {
    color: #2563eb;
    background-color: #f0f7ff;
    font-weight: 600;
}

/* Responsive navigation */
@media (max-width: 480px) {
    nav {
        gap: 0.5rem;
    }
    
    nav a {
        padding: 0.4rem 0.7rem;
        font-size: 0.9rem;
    }
}