/* ── Hamburger ── */
.hamburger
{
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 4px;
}

.hamburger span
{
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ── Mobile Nav ── */
.mobile-nav
{
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    z-index: 99;
    padding: 16px 24px;
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
}

.mobile-nav.open
{
    display: block;
}

.mobile-nav a
{
    display: block;
    padding: 12px 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav a:hover
{
    color: var(--color-text);
    text-decoration: none;
}

.mobile-nav-section-title
{
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 16px 0 4px;
}

/* ── Responsive ── */
@media (max-width: 768px)
{
    .site-nav
    {
        display: none;
    }

    .hamburger
    {
        display: flex;
    }

    .hamburger.open span:nth-child(1)
    {
        transform: rotate(45deg) translate(4px, 4px);
    }

    .hamburger.open span:nth-child(2)
    {
        opacity: 0;
    }

    .hamburger.open span:nth-child(3)
    {
        transform: rotate(-45deg) translate(4px, -4px);
    }
}