.navbar {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 var(--space-6);
    max-width: 1100px;
    margin: 0 auto;
}

.nav-brand {
    font-weight: var(--weight-bold);
    font-size: var(--title);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-md);
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.nav-toggle:hover {
    background: var(--surface-bg-hover);
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-weight: var(--weight-medium);
    border: 1px solid transparent;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.nav-link:hover {
    background: var(--surface-bg-hover);
    border-color: var(--border);
    color: var(--text-primary);
}

.nav-ext-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1_5);
    padding: var(--space-1_5) var(--space-4);
    border-radius: var(--radius-full);
    background: var(--accent-primary-subtle);
    color: var(--accent-primary);
    font-weight: var(--weight-semibold);
    font-size: var(--caption);
    border: 1px solid rgba(79, 143, 224, 0.2);
    transition: all var(--transition-smooth);
    text-decoration: none;
}

.nav-ext-link:hover {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
    box-shadow: 0 0 12px rgba(79, 143, 224, 0.3);
}

.nav-ext-link svg {
    width: 14px;
    height: 14px;
}

/* Mobile nav enhancements */
@media (max-width: 600px) {
    .navbar {
        position: relative;
        top: auto;
    }

    .nav-inner {
        padding: 0 var(--space-4);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-surface);
        border-bottom: 1px solid var(--border);
        padding: var(--space-2);
        gap: 2px;
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-smooth), opacity var(--transition-smooth), visibility var(--transition-smooth);
        pointer-events: none;
    }

    .nav-links.nav-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .nav-link {
        padding: var(--space-3) var(--space-4);
        font-size: var(--body);
        width: 100%;
        text-align: center;
    }

    .nav-ext-link {
        margin: var(--space-1) var(--space-2);
        justify-content: center;
    }
}