/* ============================================================
   08-mobile-nav.css — Mobile navigation (hamburger, overlay)
   Active < 900px
   ============================================================ */

/* Hamburger button — hidden on desktop */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 60;
    position: relative;
}

.nav-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
    border-radius: 1px;
    transition: transform 0.25s ease, opacity 0.2s ease;
    transform-origin: center;
}

/* Hamburger → X animation */
.nav-mobile-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-mobile-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.nav-mobile-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay backdrop */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 45;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* Mobile nav — responsive styles */
@media (max-width: 899px) {
    .nav-mobile-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--bg);
        padding: 1.5rem;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 55;
    }

    .nav-links-opened {
        transform: translateX(0);
    }

    .nav-link {
        padding: 1rem 0;
        font-size: 1.1rem;
        border-bottom: 1px solid var(--line-2);
        border-radius: 0;
    }

    .nav-link.active::after {
        left: 0;
        right: auto;
        bottom: 0;
        width: 40px;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: 1rem;
        width: 100%;
        text-align: center;
        justify-content: center;
        padding: 0.85rem 1.5rem;
        font-size: 1rem;
    }

    /* Prevent body scroll when menu open */
    body.nav-menu-open {
        overflow: hidden;
    }
}