/* ============================================================
   responsive.css — intentional mobile art direction
   ============================================================ */

/* large desktop */
@media (min-width: 1920px) {
  :root { --header-h: 80px; }
}

/* tablets: dial the decorative section videos down slightly for legibility */
@media (max-width: 900px) {
  .section-bg { opacity: calc(var(--bg-op, 0.2) * 0.85); }
}

/* small laptop / tablet landscape */
@media (max-width: 1180px) {
  .hero__grid { grid-template-columns: minmax(0, 1.25fr) minmax(250px, 0.75fr); }
  .chapter__layout { gap: 30px; }
  .catalog__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .catalog-item, .catalog-item--wide, .catalog-item--tall { grid-column: span 1; }
}

/* tablet portrait and below */
@media (max-width: 899px) {
  .site-nav, .header-status { display: none; }
  .menu-button { display: inline-flex; }
  .site-header {
    height: var(--header-h);
    padding: 0;
  }
  .site-header__inner {
    width: 100%;
    max-width: none;
    min-height: var(--header-h);
    padding: 0 var(--page-gutter);
    border-radius: 0;
    border: 0;
    background: linear-gradient(180deg, rgba(5,5,5,0.68), rgba(5,5,5,0));
    box-shadow: none;
    backdrop-filter: blur(0);
    justify-content: space-between;
  }
  /* scrolled → same premium floating capsule as desktop, shrunk + centered,
     with the brand and menu button visibly gathering in toward the middle */
  .site-header.is-scrolled .site-header__inner {
    width: max-content;
    max-width: calc(100vw - 32px);
    min-height: 46px;
    padding: 6px 10px 6px 18px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(7, 7, 7, 0.84);
    box-shadow:
      0 18px 46px -10px rgba(0, 0, 0, 0.7),
      0 0 26px 0 rgba(255, 255, 255, 0.05),
      inset 0 1px 0 rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(24px) saturate(1.3);
    justify-content: center;
    gap: 16px;
    animation: capsulePulse 0.6s var(--ease-out-expo), capsuleGlow 1.1s ease-out;
  }
  .site-header.is-scrolled .site-header__inner::before {
    animation: glassShineSweep 0.9s var(--ease-out-expo) 0.06s;
  }
  .site-header.is-scrolled .brand-mark {
    gap: 10px;
    animation: navGatherLeft 0.5s var(--ease-out-expo);
  }
  .site-header.is-scrolled .brand-mark svg { width: 24px; height: 24px; }
  .site-header.is-scrolled .brand-mark span {
    opacity: 1;
    transform: none;
    max-width: 180px;
    font-size: 10px;
  }
  .site-header.is-scrolled .menu-button {
    min-height: 34px;
    animation: navGatherRight 0.5s var(--ease-out-expo);
  }

  @keyframes navGatherLeft {
    from { transform: translateX(-14px); opacity: 0.4; }
    to { transform: translateX(0); opacity: 1; }
  }
  @keyframes navGatherRight {
    from { transform: translateX(14px); opacity: 0.4; }
    to { transform: translateX(0); opacity: 1; }
  }
  @keyframes capsuleGlow {
    0% { box-shadow: 0 18px 46px -10px rgba(0,0,0,0.7), 0 0 0 0 rgba(255,255,255,0.14), inset 0 1px 0 rgba(255,255,255,0.08); }
    35% { box-shadow: 0 18px 46px -10px rgba(0,0,0,0.7), 0 0 34px 4px rgba(255,255,255,0.16), inset 0 1px 0 rgba(255,255,255,0.08); }
    100% { box-shadow: 0 18px 46px -10px rgba(0,0,0,0.7), 0 0 26px 0 rgba(255,255,255,0.05), inset 0 1px 0 rgba(255,255,255,0.08); }
  }

  .hero {
    justify-content: flex-end;
    padding-top: calc(var(--header-h) + 16px);
  }
  .hero::before { opacity: 0.11; }
  .hero::after { bottom: 62px; }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 34px;
    align-items: start;
  }
  .hero__name {
    max-width: 100%;
    font-size: clamp(48px, 13.2vw, 104px);
    letter-spacing: -0.055em;
  }
  .hero__name .line-mask:last-child { margin-left: clamp(20px, 9vw, 64px); }
  .hero__microbar {
    min-height: 28px;
    font-size: 8.5px;
    letter-spacing: 0.18em;
    overflow: hidden;
  }
  .hero__microbar strong { display: none; }
  .hero__actions .button--primary { flex: 1; min-width: 200px; }

  /* rail becomes a horizontal snap strip */
  .hero__rail {
    flex-direction: row;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    margin-inline: calc(var(--page-gutter) * -1);
    padding-inline: var(--page-gutter);
    padding-bottom: 6px;
    scrollbar-width: none;
  }
  .hero__rail::-webkit-scrollbar { display: none; }
  .hero__rail-label { display: none; }
  .rail-card {
    scroll-snap-align: start;
    flex: 0 0 min(320px, 82vw);
    grid-template-columns: 96px minmax(0, 1fr);
  }
  .rail-card__index { display: none; }
  .rail-card:hover { transform: none; }

  .shelf__feature {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .shelf__feature-media { aspect-ratio: 16 / 10; min-height: 0; }
  .shelf__feature-body { border-left: 0; border-top: 1px solid var(--line-soft); padding: 26px 22px 30px; }
  .shelf__row { grid-template-columns: 1fr; }
  .shelf-cinema {
    min-height: 0;
    margin-top: 40px;
  }
  .shelf-cinema::before { opacity: 0.22; }
  .shelf-cinema__sticky {
    position: relative;
    top: auto;
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .shelf-cinema__stage {
    min-height: auto;
    aspect-ratio: 16 / 12;
  }
  .shelf-cinema__panel {
    display: flex;
    flex-direction: column;
    gap: 22px;
  }
  .shelf-cinema__copy-wrap {
    min-height: clamp(310px, 56vw, 420px);
  }
  .shelf-cinema__name {
    font-size: clamp(40px, 11vw, 68px);
  }
  .shelf-cinema__controls {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    margin-inline: calc(var(--page-gutter) * -1);
    padding-inline: var(--page-gutter);
    padding-bottom: 8px;
    scrollbar-width: none;
  }
  .shelf-cinema__controls::-webkit-scrollbar { display: none; }
  .shelf-cinema__control {
    scroll-snap-align: start;
    flex: 0 0 min(330px, 84vw);
    transform: none !important;
  }
  .work-card {
    width: min(88vw, 760px);
    min-height: auto;
    grid-template-columns: 1fr;
    align-items: start;
    padding: 14px;
  }
  .work-card__media {
    min-height: auto;
    aspect-ratio: 16 / 11;
  }
  .work-card__copy { padding: 8px 4px 12px; }
  .work-card__name { font-size: clamp(38px, 10vw, 72px); }
  .work-card__play {
    width: 74px;
    height: 74px;
    font-size: 8px;
  }
  /* opening layouts handle their own stacking in components.css (@860px) */

  .chapter__pin { min-height: 0; padding-block: clamp(40px, 8vw, 70px); }
  .chapter__layout,
  .chapter--mainstage .chapter__layout { grid-template-columns: 1fr; gap: 26px; }
  .chapter--mainstage .chapter__stage { order: 1; }
  .chapter--mainstage .chapter__copy { order: 2; }
  .chapter__screen { display: none; }
  .chapter--tecksart .chapter__copy { flex-direction: column; align-items: flex-start; }
  .chapter--vant .chapter__stage { grid-template-columns: 1fr; }
  .chapter--vant .chapter__cell--wide { grid-column: span 1; aspect-ratio: 16 / 10; }

  .process__layout { grid-template-columns: 1fr; }
  .process__rail {
    position: sticky;
    top: calc(var(--header-h) + 14px);
    z-index: 3;
    flex-direction: row;
    align-items: center;
    gap: 14px;
    width: max-content;
    margin-inline: auto;
    margin-bottom: 18px;
    padding: 9px 20px 9px 22px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(7, 7, 7, 0.74);
    backdrop-filter: blur(20px) saturate(1.2);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  }
  .process__current {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1;
  }
  .process__track { width: 64px; height: 1px; margin-left: 0; }
  .process__track i { transform-origin: left; transform: scaleX(0); }
  .process__track.is-h i { transform: scaleX(var(--p, 0)); }
  .process-step { grid-template-columns: 54px minmax(0, 1fr); }

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

  /* narrower viewport needs a closer "camera" to read as a real 3D barrel
     instead of a flat sliding row — same geometry, more foreshortening */
  .lab-cylinder {
    perspective: 620px;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  }

  .lab__reel {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    perspective: none;
    margin-inline: calc(var(--page-gutter) * -1);
    padding-inline: var(--page-gutter);
    scrollbar-width: none;
    cursor: auto;
  }
  .lab__reel::-webkit-scrollbar { display: none; }
  .lab-item { scroll-snap-align: center; width: min(360px, 80vw); }

  .footer__panels { grid-template-columns: 1fr; }
  .footer__left {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    min-height: 380px;
  }
  .footer__right { padding-block: 44px; }

  .viewer__type { display: none; }
  .viewer__action span { display: none; }
  .viewer__action { padding: 0 13px; }
  .viewer__name { font-size: 13.5px; }
}

/* small tablets / large phones: catalog collapses to one column */
@media (max-width: 640px) {
  .catalog__grid { grid-template-columns: 1fr; gap: 26px; }
  .shelf-cinema__stage { aspect-ratio: 16 / 12; }
  .shelf-cinema__chrome { height: 38px; }
  .shelf-cinema__screen-stack { inset: 38px 0 0; }
  .shelf-cinema__screen--2,
  .shelf-cinema__screen--3 { display: none; }
  .shelf-cinema__meta-strip {
    left: 14px;
    right: 14px;
    bottom: 14px;
    font-size: 9px;
  }
  .shelf-cinema__copy-wrap { min-height: 370px; }
  .shelf-cinema__actions .button { width: 100%; }
}

/* phones */
@media (max-width: 480px) {
  :root { --header-h: 62px; }
  .hero__name { font-size: clamp(42px, 13vw, 64px); letter-spacing: -0.035em; }
  .hero__microbar { display: none; }
  .shelf__feature-actions .button,
  .chapter__actions .button { width: 100%; }
  .footer__heading { font-size: clamp(30px, 9.5vw, 44px); }
  .catalog__filter { padding: 10px 15px; }
}