/* ==========================================================================
   BookZen — responsive.css
   Checked at: 320 · 375 · 390 · 414 · 768 · 820 (iPad Air) · 1024 · 1280 · 1440 · 1920
   ========================================================================== */

@media (min-width: 1600px) {
  .container { max-width: 1320px; }
  .hs-slide { min-height: 700px; }
}

/* ≤ 1199 : laptop ---------------------------------------------------------- */
@media (max-width: 1199.98px) {
  .bz-nav-link { padding: 10px 10px; font-size: 14.5px; }
  .bz-nav-link::after { left: 10px; right: 10px; }
  .bz-header .container { gap: 14px; }
  .header-cta { padding: 0 16px; }
  .logo img { height: 46px; }
  .strip-card { grid-template-columns: repeat(6, 1fr); }
  .strip-item { grid-column: span 2; }
  .strip-item:nth-child(n+4) { grid-column: span 3; border-top: 1px solid var(--line); }
  .strip-item:nth-child(4)::before { display: none; }
  .process { grid-template-columns: repeat(3, 1fr); row-gap: 44px; }
  .process::before { display: none; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .why-card:nth-child(3) { padding-left: 0; border-left: 0; }
  .why-card:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .brand p { max-width: 46ch; }
  .cat-block { grid-template-columns: 280px 1fr; gap: 40px; }
  .book-stage .book3d:nth-child(1) { --bw: 150px; --d: 22px; }
  .book-stage .book3d:nth-child(2) { --bw: 210px; --d: 30px; }
  .book-stage .book3d:nth-child(3) { --bw: 162px; --d: 24px; }
  .page-hero-art.is-book .book3d { --bw: 220px; }
  .page-hero-art.is-book .book3d.is-back { --bw: 172px; }
  .mega { padding: 24px 20px 18px; }
  .mega-col { padding: 0 14px; }
  .mega ul { padding-left: 0; }
}

/* ≤ 991 : tablet / iPad ---------------------------------------------------- */
@media (max-width: 991.98px) {
  :root { --header-h: 68px; }
  .sec { --sec-y: 88px; }
  .logo img, .bz-header.is-scrolled .logo img { height: 42px; }
  .menu-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .bz-header .container, .bz-header.is-scrolled .container { height: 68px; }
  .bz-header.nav-open { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--page); }
  .bz-nav {
    position: fixed; inset: 68px 0 0 0; margin: 0; padding: 8px 20px 120px;
    background: var(--page); overflow-y: auto; overscroll-behavior: contain;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .25s, transform .3s var(--ease), visibility .25s;
  }
  .nav-open .bz-nav { opacity: 1; visibility: visible; transform: none; }
  .bz-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .bz-nav > ul > li { border-bottom: 1px solid var(--line); }
  .bz-nav-link { width: 100%; justify-content: space-between; padding: 18px 2px; font-family: var(--f-serif); font-size: 19px; font-weight: 500; }
  .bz-nav-link[aria-current="page"] { font-weight: 600; color: var(--teal-text); }
  .bz-nav-link::after { display: none; }
  .mega {
    position: static; transform: none; width: auto; box-shadow: none; border: 0;
    max-height: none; overflow: visible;
    padding: 4px 0 18px; display: none; opacity: 1; visibility: visible; border-radius: 0; background: transparent;
  }
  .mega::before { display: none; }
  .has-mega[data-open="true"] .mega { display: block; transform: none; }
  .mega-cols { grid-template-columns: repeat(2, 1fr); gap: 22px 0; }
  .mega-col:nth-child(3) { border-left: 0; padding-left: 0; }
  .mega ul { padding-left: 46px; }
  .mega li a { padding: 7px 0; font-size: 15px; }
  .mega-cta { display: none; }
  .bz-nav .mobile-cta { display: block; padding-top: 24px; border: 0; }
  .bz-nav .mobile-cta .bz-btn { width: 100%; }

  .hero-studio { padding-top: 32px; }
  .hs-slide { min-height: 0; align-items: flex-start; }
  .hs-inner { grid-template-columns: 1fr; gap: 16px; padding-top: 18px; padding-bottom: 140px; }
  .hs-title { max-width: 16ch; }
  .hero-media, .book-stage { justify-self: center; max-width: 560px; margin-top: 8px; }
  .book-stage { height: auto; aspect-ratio: 1320 / 1200; padding-bottom: 18%; }
  .book-stage::after { bottom: 16%; }  /* same box as the other slides' artwork, so no gap */
  .hs-controls { bottom: 78px; }
  .strip { margin-top: -40px; }

  .pf-grid, .pf-featured { grid-template-columns: repeat(2, 1fr); gap: 36px 22px; }
  .pf-featured .pf-card:first-child { grid-column: span 2; grid-row: span 1; }
  .pf-featured .pf-card:first-child .pf-media { flex: none; aspect-ratio: 16 / 10; min-height: 0; }
  .pf-featured .pf-card:first-child .pf-media.is-book .book3d { --bw: 26cqw; --d: 3cqw; }
  .pf-featured .pf-card:last-child { grid-column: span 2; }
  .pf-featured .pf-card:last-child .pf-media { aspect-ratio: 16 / 10; }
  .pf-featured .pf-card:last-child .pf-media.is-book .book3d { --bw: 26cqw; --d: 3cqw; }
  .pf-filters { flex-wrap: nowrap; overflow-x: auto; scroll-snap-type: x proximity; padding-bottom: 8px; margin-right: -20px; scrollbar-width: thin; }
  .pf-filter { flex: none; scroll-snap-align: start; }
  .project-modal .pm-grid { grid-template-columns: 1fr; }
  .project-modal .pm-img img { min-height: 0; max-height: 50vh; }
  .project-modal .pm-body { padding: 26px 22px 30px; }
  .pm-nav { width: 40px; height: 40px; }
  .pm-prev { left: 8px; }
  .pm-next { right: 8px; }

  .create-grid { grid-template-columns: repeat(2, 1fr); gap: 22px; }
  .create-card, .create-card.wide { grid-column: span 1; }
  .create-card.wide .create-subs { grid-template-columns: 1fr; }
  .create-card:last-child { grid-column: span 2; }
  .create-card:last-child .create-subs { grid-template-columns: 1fr 1fr; }
  .ba-wrap { grid-template-columns: 1fr; gap: 24px; }
  .ba-tabs { flex-direction: row; overflow-x: auto; padding-bottom: 6px; }
  .ba-tab { flex: none; }
  .studio-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .global, .about-split, .faq-wrap, .intro-split, .provide { grid-template-columns: 1fr; gap: 40px; }
  .faq-wrap > div:first-child { position: static; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .page-hero { padding: 48px 0 64px; }
  .page-hero .grid { grid-template-columns: 1fr; gap: 40px; }
  .page-hero-art { max-width: 560px; }
  .page-hero-art.is-book { max-width: none; min-height: 400px; }
  .cat-block { grid-template-columns: 1fr; gap: 28px; padding: 56px 0; }
  .cat-aside { position: static; display: grid; grid-template-columns: 200px 1fr; gap: 0 24px; align-items: center; }
  .cat-aside .cat-art { grid-row: span 4; margin: 0; aspect-ratio: 1 / 1; }
  .cat-jump { top: 68px; }
  .timeline::before { left: 20px; }
  .tl-item { grid-template-columns: 1fr; gap: 20px; padding-left: 52px; }
  .tl-item::after { left: 20px; top: 30px; transform: translateX(-50%); }
  .tl-item:nth-child(even) .tl-media { order: 0; }
  .cta-band { grid-template-columns: 1fr; padding: 64px 36px 56px; }
  .cta-band .actions { grid-column: 1; grid-row: auto; justify-content: flex-start; margin-top: 10px; }
  .cta-band::before { right: 36px; height: 64px; width: 22px; }
  .form-card { padding: 32px; }
}
@media (min-width: 992px) { .bz-nav .mobile-cta { display: none; } }

/* ≤ 767 : large phones ----------------------------------------------------- */
@media (max-width: 767.98px) {
  .sec { --sec-y: 72px; }
  .sec-head { margin-bottom: 36px; }
  .strip-card { grid-template-columns: 1fr 1fr; }
  .strip-item, .strip-item:nth-child(n+4) { grid-column: span 1; }
  .strip-item::before { display: none; }
  .strip-item:nth-child(n+3) { border-top: 1px solid var(--line); }
  .strip-item:nth-child(even) { border-left: 1px solid var(--line); }
  .strip-item:last-child { grid-column: 1 / -1; border-left: 0; }
  .hs-controls .container { gap: 12px; }
  .hs-arrow { width: 40px; height: 40px; }
  .book-stage .book3d:nth-child(1) { --bw: 118px; --d: 18px; margin-right: -22px; }
  .book-stage .book3d:nth-child(2) { --bw: 168px; --d: 24px; }
  .book-stage .book3d:nth-child(3) { --bw: 128px; --d: 18px; margin-left: -12px; }
  .process { grid-template-columns: 1fr 1fr; }
  .process .step:last-child { grid-column: 1 / -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 24px; }
  .footer-grid > div:last-child { grid-column: 1 / -1; }
  .bz-footer { padding-top: 64px; }
  .footer-grid .brand { grid-column: 1 / -1; }
  .ba { aspect-ratio: 4 / 3; }
  .provide-grid { grid-template-columns: 1fr; }
  .cat-aside { grid-template-columns: 1fr; }
  .cat-aside .cat-art { grid-row: auto; margin-bottom: 20px; aspect-ratio: 16 / 9; }
  .create-grid { grid-template-columns: 1fr; }
  .create-card:last-child { grid-column: span 1; }
  .create-card .create-subs, .create-card.wide .create-subs, .create-card:last-child .create-subs { grid-template-columns: 1fr; }
  .page-hero-art.is-book { min-height: 340px; }
  .page-hero-art.is-book .book3d { --bw: 190px; --d: 26px; }
  .page-hero-art.is-book .book3d.is-back { --bw: 146px; --d: 20px; margin-right: -30px; }
  .quote-modal .modal-header { padding: 32px 24px 0; }
  .quote-modal .modal-body { padding: 22px 24px 32px; }
  .quote-modal .modal-header::before { right: 72px; }
}

/* ≤ 575 : phones ----------------------------------------------------------- */
@media (max-width: 575.98px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .sec-title { font-size: 1.9rem; }
  .mega-cols { grid-template-columns: 1fr; }
  .mega-col { border-left: 0 !important; padding: 0 !important; }
  .mega ul { padding-left: 46px; }
  .hs-title { font-size: 2.35rem; }
  .hs-actions .bz-btn { flex: 1 1 100%; }
  .trust { gap: 8px 16px; }
  .trust li { font-size: 13px; }
  .hs-counter { min-width: 52px; }
  .hs-pause { display: none; }
  .book-stage { padding-bottom: 8%; }
  .book-stage::after { bottom: 6%; }
  .book-stage .book3d:nth-child(1) { --bw: 96px; --d: 14px; }
  .book-stage .book3d:nth-child(2) { --bw: 138px; --d: 20px; }
  .book-stage .book3d:nth-child(3) { --bw: 104px; --d: 14px; }
  .strip-card { grid-template-columns: 1fr; }
  .strip-item, .strip-item:nth-child(even) { padding: 16px 18px; border-left: 0; }
  .strip-item:nth-child(n+2) { border-top: 1px solid var(--line); }
  .pf-grid, .pf-featured { grid-template-columns: 1fr; gap: 32px; }
  .pf-featured .pf-card:first-child, .pf-featured .pf-card:last-child { grid-column: span 1; }
  .pf-featured .pf-card:first-child .pf-media,
  .pf-featured .pf-card:last-child .pf-media { aspect-ratio: 1 / 1; }
  .pf-featured .pf-card:first-child .pf-media.is-book .book3d,
  .pf-featured .pf-card:last-child .pf-media.is-book .book3d { --bw: 42cqw; --d: 4.4cqw; }
  .pf-overlay { opacity: 1; background: linear-gradient(to top, rgba(22,30,31,.5), transparent 36%); }
  .pf-overlay span { display: none; }
  .pf-more .bz-btn { width: 100%; }
  .studio-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; row-gap: 28px; }
  .process .step { display: grid; grid-template-columns: 64px 1fr; gap: 18px; text-align: left; align-items: start; }
  .process .step-icon { margin: 0; }
  .process .step p { margin: 0; }
  .why-grid { grid-template-columns: 1fr; }
  .why-card, .why-card + .why-card { padding: 26px 0 0; border-left: 0; margin-top: 0; }
  .why-card + .why-card { border-top: 1px solid var(--line); margin-top: 26px; }
  .country-list { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-grid > div:last-child { grid-column: auto; }
  .cta-band { padding: 56px 22px 44px; }
  .cta-band .bz-btn { width: 100%; }
  .page-hero h1 { font-size: 2.3rem; }
  .page-hero .hs-actions .bz-btn { flex: 1 1 100%; }
  .page-hero-art.is-book { min-height: 300px; }
  .page-hero-art.is-book .book3d { --bw: 164px; --d: 22px; }
  .page-hero-art.is-book .book3d.is-back { --bw: 124px; --d: 16px; margin-right: -26px; }
  .page-hero-art.is-art { padding: 12px; }
  .form-card { padding: 24px 18px; }
  .form-foot .bz-btn { width: 100%; }
  .ba-label { top: 10px; font-size: 11px; padding: 4px 8px; }
  .ba-label.before { left: 10px; } .ba-label.after { right: 10px; }
  .ba-handle { width: 42px; height: 42px; margin: -21px 0 0 -21px; }
  .intro-note { padding: 22px 20px; }
  .bz-accordion .accordion-body { padding-right: 8px; }
}