/* ═══════════════════════════════════════
   Navigation — fixed glass bar, ghost-glyph logo, hamburger
   ═══════════════════════════════════════ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 100;
    backdrop-filter: var(--blur-nav);
    -webkit-backdrop-filter: var(--blur-nav);
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: none;
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled { box-shadow: var(--shadow-sm); }

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.3rem;
    letter-spacing: -0.01em;
}

.nav-logo .nav-glyph {
    color: var(--accent);
    display: inline-flex;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links a {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover {
    color: var(--text);
    background: var(--surface-subtle);
}

.nav-links a.nav-github {
    display: inline-flex;
    align-items: center;
}

.nav-links .btn-nav {
    margin-left: 6px;
    color: var(--bg);
}

.nav-links .btn-nav:hover { color: var(--bg); }

/* Mobile hamburger */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text);
}
.nav-toggle svg { width: 24px; height: 24px; }

@media (max-width: 860px) {
    .nav-toggle { display: block; }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 32px 24px;
        background: var(--nav-bg);
        backdrop-filter: var(--blur-nav);
        -webkit-backdrop-filter: var(--blur-nav);
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

    .nav-links.open { display: flex; }

    .nav-links a {
        padding: 12px 14px;
        width: 100%;
    }

    .nav-links a.nav-github { justify-content: flex-start; gap: 10px; }

    .nav-links .btn-nav {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
        justify-content: center;
    }
}