---
const currentPath = Astro.url.pathname;

const links = [
    { href: "/", label: "home" },
    { href: "/about", label: "about" },
    { href: "/projects", label: "projects" },
    { href: "/now", label: "now" },
    { href: "/blog", label: "blog" },
    { href: "/guestbook", label: "guestbook" },
];

function isActive(href: string, current: string): boolean {
    if (href === "/") return current === "/";
    return current.startsWith(href);
}
---

<nav class="nav" aria-label="Main navigation">
    <div class="nav-inner">
        {
            links.map((link, i) => (
                <>
                    {i > 0 && (
                        <span class="nav-sep" aria-hidden="true">
                            ·
                        </span>
                    )}
                    <a
                        href={link.href}
                        class:list={[
                            "nav-link",
                            { active: isActive(link.href, currentPath) },
                        ]}
                        aria-current={
                            isActive(link.href, currentPath)
                                ? "page"
                                : undefined
                        }
                    >
                        ~/{link.label}
                    </a>
                </>
            ))
        }
    </div>
</nav>

<style>
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        padding: var(--space-sm) var(--space-md);
        background: var(--color-glass-nav);
        backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--color-surface);
    }

    .nav-inner {
        max-width: 700px;
        margin: 0 auto;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: center;
        gap: var(--space-xs);
        font-size: 0.85rem;
    }

    .nav-sep {
        color: var(--color-surface);
        user-select: none;
    }

    .nav-link {
        color: var(--color-text-dim);
        text-decoration: none;
        padding: 2px 4px;
        border-radius: 3px;
        transition: color 0.2s ease;
    }

    .nav-link:hover {
        color: var(--color-accent-bright);
    }

    .nav-link.active {
        color: var(--color-accent);
        text-decoration: underline;
        text-underline-offset: 3px;
    }

    @media (max-width: 600px) {
        .nav {
            padding: var(--space-xs) var(--space-sm);
        }

        .nav-inner {
            font-size: 0.8rem;
        }
    }
</style>