/* ============================================================
   GreenBooksWorld.com — Responsive CSS
   ============================================================ */

/* ── Large Desktop (1280+) ─────────────────────────────────── */
@media (min-width: 1280px) {
    .books-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ── Tablet (768–1024) ─────────────────────────────────────── */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-item:nth-child(2) {
        border-right: none;
    }

    .stat-item:nth-child(3) {
        border-top: 1px solid rgba(255, 255, 255, .1);
    }

    .world-inner {
        grid-template-columns: 1fr;
    }

    .world-map-wrap {
        display: none;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .contact-info-card {
        position: static;
    }

    .cart-layout {
        grid-template-columns: 1fr;
    }

    .cart-summary {
        position: static;
    }

    .admin-stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Mobile L (max 768) ────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --nav-h: 64px;
    }

    .nav-links {
        display: none;
    }

    .nav-btn {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .section {
        padding: 64px 0;
    }

    .section-sm {
        padding: 40px 0;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .slide-content {
        padding: 0 16px;
        padding-top: var(--nav-h);
    }

    .slide-actions {
        flex-direction: column;
    }

    .slider-arrow {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-number {
        font-size: 2rem;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .book-body {
        padding: 12px;
    }

    .book-title {
        font-size: 0.88rem;
    }

    .add-to-cart {
        padding: 7px 10px;
        font-size: 0.72rem;
    }

    .world-countries {
        display: none;
    }

    .about-img-main {
        height: 200px;
    }

    .about-img-sm {
        height: 120px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .push-popup {
        max-width: 290px;
        bottom: 16px;
        right: 16px;
    }

    .admin-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .admin-sidebar.open {
        transform: translateX(0);
    }

    .admin-main {
        margin-left: 0;
    }

    .admin-content {
        padding: 16px;
    }

    .admin-stats-row {
        grid-template-columns: 1fr 1fr;
    }

    .admin-topbar {
        padding: 12px 16px;
    }

    .modal {
        padding: 24px;
    }

    .page-hero {
        padding: 100px 0 56px;
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Mobile S (max 480) ────────────────────────────────────── */
@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, .1);
    }

    .admin-stats-row {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }

    .about-img-grid {
        grid-template-columns: 1fr;
    }

    .about-img-main {
        grid-column: auto;
    }
}