/* ============================================================================
   6 · Thực đơn (menu) + lightbox
   Design source: design/v3.0.1/reference/nam-yam-index.html  L194–241

   The belt is an endless rail. JS sets three custom properties on #menu-belt:
     --slot      width of one slot (card + gutter)
     --gap       gutter
     --belt-h    measured height of the tallest card
     --arrow-top vertical centre of the card image, for the arrows
   The section keeps a wider side padding (--ny-pad-menu, min 88px) because the
   arrows sit OUTSIDE the rail and would otherwise fall off screen.
   ============================================================================ */

#menu {
  background: var(--ny-cream);
  color: var(--ny-ink);
  padding: clamp(72px, 10vw, 132px) var(--ny-pad-menu) clamp(80px, 11vw, 140px);
}

.ny-menu__head { display: flex; flex-direction: column; gap: 16px; }
.ny-menu__head h2 {
  font: var(--ny-serif-regular) var(--ny-fs-h2)/var(--ny-lh-tight) var(--ny-serif);
  color: var(--ny-ink);
}
.ny-menu__head h2 span { color: var(--ny-bronze); }

.ny-menu__hint {
  margin-top: clamp(34px, 4.4vw, 52px);
  font: var(--ny-sans-regular) var(--ny-fs-label)/1.5 var(--ny-sans);
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--ny-label-alt);
}

.ny-menu__rail { position: relative; margin-top: 14px; }

.ny-menu__arrow {
  position: absolute; z-index: 6;
  top: var(--arrow-top, 50%);
  transform: translateY(-50%);
  width: var(--ny-tap); height: var(--ny-tap);
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--ny-dark-28);
  background: transparent;
  color: var(--ny-ink);
  font-size: 15.3px;
  cursor: pointer;
  transition: background var(--ny-fast), border-color var(--ny-fast);
}
.ny-menu__arrow:hover {
  background: var(--ny-dark-08);
  border-color: var(--ny-red);
  color: var(--ny-red);
}
.ny-menu__arrow--prev { right: calc(100% + clamp(8px, 1vw, 18px)); }
.ny-menu__arrow--next { left:  calc(100% + clamp(8px, 1vw, 18px)); }

.ny-menu__belt {
  position: relative;
  overflow: hidden;
  height: var(--belt-h, clamp(454px, 52vw, 684px));
}

.ny-book {
  position: absolute; top: 12px; left: 0;
  width: var(--slot, 100%);
  padding-right: var(--gap, 15px);
}

.ny-book__btn {
  display: block; width: 100%;
  padding: 0; border: 0;
  background: transparent;
  color: var(--ny-ink);
  text-align: left;
  cursor: pointer;
  transition: transform var(--ny-med) var(--ny-ease);
}
.ny-book__btn:hover { transform: translateY(-8px); }

.ny-book__shot {
  position: relative; display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--ny-book-back);
}
.ny-book__shot img {
  display: block;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(.8) contrast(1.04);
  transition: transform var(--ny-slow) var(--ny-ease), filter var(--ny-slow);
}
.ny-book__img--r  { object-position: 78% 55%; }
.ny-book__img--r2 { object-position: 92% 45%; }
.ny-book__btn:hover .ny-book__shot img { transform: scale(1.025); filter: saturate(1) contrast(1.04); }

.ny-book__veil {
  position: absolute; inset: 0;
  background: var(--ny-veil);
  border: 1px solid var(--ny-dark-18);
  transition: border-color var(--ny-med);
}
.ny-book__btn:hover .ny-book__veil { border-color: var(--ny-gold-80); }

.ny-book__index {
  display: block; margin-top: 18px;
  font: var(--ny-sans-regular) var(--ny-fs-body)/1 var(--ny-sans);
  letter-spacing: .18em;
  color: var(--ny-red);
}
.ny-book__name {
  display: block; margin-top: 8px;
  font: var(--ny-serif-regular) var(--ny-fs-h3)/1.08 var(--ny-serif);
}
.ny-book__act {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; padding: 12px 0;
  border-top: 1px solid var(--ny-dark-20);
  font: var(--ny-sans-regular) var(--ny-fs-label)/1 var(--ny-sans);
  text-transform: uppercase;
  letter-spacing: .17em;
  transition: border-color 480ms, color 480ms, letter-spacing 480ms;
}
.ny-book__act i { font-style: normal; color: var(--ny-red); }
.ny-book__btn:hover .ny-book__act {
  border-color: var(--ny-red);
  color: var(--ny-red);
  letter-spacing: .22em;
}

.ny-menu__foot {
  margin-top: clamp(22px, 2.8vw, 36px);
  font: var(--ny-sans-regular) var(--ny-fs-label)/1.6 var(--ny-sans);
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--ny-label-alt);
}

/* ---- Lightbox ------------------------------------------------------------ */
.ny-lightbox {
  position: fixed; inset: 0; z-index: var(--ny-z-lightbox);
  background: var(--ny-lightbox-bg);
  display: flex; flex-direction: column;
  padding: clamp(14px, 2.4vw, 32px);
}
.ny-lightbox[hidden] { display: none; }

.ny-lightbox__bar {
  flex: none;
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 20px;
  padding-bottom: clamp(12px, 1.6vw, 20px);
  border-bottom: 1px solid var(--ny-gold-28);
}
.ny-lightbox__bar p { display: flex; flex-direction: column; gap: 5px; }
.ny-lightbox__kicker {
  font: var(--ny-sans-regular) var(--ny-fs-label)/1 var(--ny-sans);
  text-transform: uppercase;
  letter-spacing: .25em;
  color: var(--ny-gold);
}
.ny-lightbox__bar strong {
  font: var(--ny-serif-regular) clamp(17.1px, 1.8vw, 25.2px)/var(--ny-lh-heading) var(--ny-serif);
  color: var(--ny-white);
}
.ny-lightbox__bar button {
  flex: none;
  width: var(--ny-tap); height: var(--ny-tap);
  border: 1px solid var(--ny-gold-40);
  background: transparent;
  color: var(--ny-white);
  font-size: 19.8px;
  cursor: pointer;
}
.ny-lightbox__stage {
  flex: 1; min-height: 0;
  display: flex; align-items: center; justify-content: center;
  padding: clamp(12px, 2vw, 26px) 0;
}
.ny-lightbox__stage img {
  display: block;
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center;
}
.ny-lightbox__note {
  flex: none;
  text-align: center;
  font: var(--ny-sans-regular) var(--ny-fs-label)/1.6 var(--ny-sans);
  text-transform: uppercase;
  letter-spacing: .18em;
  color: var(--ny-white-50);
}

@media (max-width: 760px) {
  #menu { padding: clamp(52px, 8.5vw, 68px) var(--ny-pad-sm) clamp(60px, 9.5vw, 78px); }
  /* Arrows would need ~54px of side padding; mobile has 22px. Swipe covers it. */
  .ny-menu__arrow { display: none; }
}