/* ==========================================================================
   NICU Jargon Rx - cards.css
   The five-category classification system, the card explorer, the card
   anatomy diagram and the bilingual (English / Español) presentation.

   COLOUR DISCIPLINE
   Category color is applied through a single `--cat` custom property that
   each category scope sets once. Color is used for markers, keylines, rules,
   numerals and interactive states - never as a large saturated field. The
   category name is always printed alongside its color, so no information is
   ever carried by color alone.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CATEGORY SCOPES
   Any element carrying [data-cat] inherits that category's two tones.
   -------------------------------------------------------------------------- */
/* Default first, so an unrecognised category still renders in brand teal
   rather than collapsing. The five named scopes below override it. */
[data-cat] { --cat: var(--brand-deep); --cat-lift: var(--brand-lift); }

[data-cat="diseases"]    { --cat: var(--cat-diseases);    --cat-lift: var(--cat-diseases-lift);
                           --cat-face: var(--cat-diseases); }
[data-cat="vocabulary"]  { --cat: var(--cat-vocabulary);  --cat-lift: var(--cat-vocabulary-lift);
                           --cat-face: var(--cat-vocabulary); }
[data-cat="respiratory"] { --cat: var(--cat-respiratory); --cat-lift: var(--cat-respiratory-lift);
                           --cat-face: var(--cat-respiratory); }
[data-cat="nutrition"]   { --cat: var(--cat-nutrition);   --cat-lift: var(--cat-nutrition-lift);
                           --cat-face: var(--cat-nutrition); }
[data-cat="imaging"]     { --cat: var(--cat-imaging);     --cat-lift: var(--cat-imaging-lift);
                           --cat-face: var(--cat-imaging); }

/* On ink, TEXT and markers swap to the lighter tone (each clears 4.5:1
   against --ink). --cat-face deliberately does NOT swap: a printed card is a
   large color field, and the pale tint reads washed-out at that size. */
.on-ink [data-cat] { --cat: var(--cat-lift); }

/* --- The color marker: a filled square, not a dot. Reads as a plate
       reference in a catalogue rather than a status light. ----------------- */
.cat-swatch {
  width: .6rem;
  height: .6rem;
  border-radius: 1px;
  background: var(--cat);
  flex: none;
  display: inline-block;
}
.cat-swatch--lg { width: .85rem; height: .85rem; border-radius: 2px; }

/* Color name printed beside the swatch - color is never the only signal */
.cat-color-name {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cat);
}

/* --------------------------------------------------------------------------
   2. THE FIVE-CATEGORY INDEX
   The "reveal the system" moment: all five shown together as one family.
   -------------------------------------------------------------------------- */
.cat-index {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  border-block-start: 1px solid var(--line);
}
.on-ink .cat-index { border-block-start-color: var(--line-dark); }

.cat-index__item {
  position: relative;
  padding: clamp(1.25rem, .8rem + 1.6vw, 2rem) clamp(1rem, .5rem + 1.4vw, 1.75rem)
           clamp(1.5rem, 1rem + 2vw, 2.5rem) 0;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.cat-index__item + .cat-index__item {
  padding-inline-start: clamp(1rem, .5rem + 1.4vw, 1.75rem);
  border-inline-start: 1px solid var(--line);
}
.on-ink .cat-index__item + .cat-index__item { border-inline-start-color: var(--line-dark); }

/* The color keyline that identifies the category - draws in on reveal */
.cat-index__item::before {
  content: "";
  position: absolute;
  inset-block-start: -1px;
  inset-inline-start: 0;
  height: 2px;
  width: 0;
  background: var(--cat);
  transition: width var(--dur-4) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.cat-index.is-in .cat-index__item::before { width: 100%; }
.no-js .cat-index__item::before { width: 100%; }

.cat-index__num {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cat);
  font-variant-numeric: tabular-nums;
}

.cat-index__name {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, .9rem + 1vw, 1.6rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-variation-settings: "SOFT" 18, "WONK" 0;
  color: var(--ink);
}
.on-ink .cat-index__name { color: var(--cream); }

.cat-index__meta { display: flex; align-items: center; gap: .45rem; }

.cat-index__text {
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--muted);
  margin-block-start: auto;
  padding-block-start: .35rem;
}
.on-ink .cat-index__text { color: var(--muted-dark); }

/* Miniature card stack - three slivers in the category color */
.cat-mini {
  display: flex;
  gap: 3px;
  margin-block-start: .35rem;
}
.cat-mini span {
  display: block;
  width: 1.1rem;
  aspect-ratio: 5 / 7;
  border-radius: 2px;
  background: color-mix(in srgb, var(--cat) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--cat) 42%, transparent);
}
.cat-mini span:first-child { background: var(--cat); border-color: var(--cat); }

/* Tablet: 3 + 2 */
@media (max-width: 1099px) and (min-width: 700px) {
  .cat-index { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cat-index__item:nth-child(4) {
    border-inline-start: 0;
    padding-inline-start: 0;
  }
  .cat-index__item:nth-child(n + 4) {
    border-block-start: 1px solid var(--line);
    margin-block-start: -1px;
  }
  .cat-index__item:nth-child(n + 4)::before { inset-block-start: -1px; }
}

/* Mobile: stacked rows, compact */
@media (max-width: 699px) {
  .cat-index { grid-template-columns: 1fr; }
  .cat-index__item {
    padding: 1.15rem 0 1.35rem;
    border-inline-start: 0 !important;
    padding-inline-start: 0 !important;
    border-block-end: 1px solid var(--line);
  }
  .cat-index__item::before { inset-block-start: 0; }
  .cat-index__item:last-child { border-block-end: 0; }
  .cat-mini { position: absolute; top: 1.15rem; right: 0; margin: 0; }
}

/* --------------------------------------------------------------------------
   3. THE EXPLORER - tablist + deck
   -------------------------------------------------------------------------- */
.explorer { --card-max: clamp(20rem, 6rem + 46vw, 42rem); }

/* --- Tabs ---------------------------------------------------------------- */
.cat-tabs {
  display: flex;
  gap: 0;
  border-block-end: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
}
.cat-tabs::-webkit-scrollbar { display: none; }
.on-ink .cat-tabs { border-block-end-color: var(--line-dark); }

.cat-tab {
  position: relative;
  flex: 1 1 0;
  min-width: max-content;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .4rem;
  padding: .9rem clamp(.9rem, .5rem + 1vw, 1.5rem) 1.05rem 0;
  text-align: start;
  color: var(--muted);
  transition: color var(--dur-2) var(--ease);
  white-space: nowrap;
}
.cat-tab + .cat-tab { padding-inline-start: clamp(.9rem, .5rem + 1vw, 1.5rem); }
.on-ink .cat-tab { color: var(--muted-dark); }

/* Active indicator in the category color */
.cat-tab::after {
  content: "";
  position: absolute;
  inset-block-end: -1px;
  inset-inline: 0;
  height: 2px;
  background: var(--cat);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}
.cat-tab[aria-selected="true"]::after { transform: scaleX(1); }
.cat-tab:hover::after { transform: scaleX(1); opacity: .4; }
.cat-tab[aria-selected="true"]:hover::after { opacity: 1; }

.cat-tab__top { display: flex; align-items: center; gap: .45rem; }

.cat-tab__num {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .14em;
  font-variant-numeric: tabular-nums;
  color: currentColor;
  transition: color var(--dur-2) var(--ease);
}
.cat-tab[aria-selected="true"] .cat-tab__num { color: var(--cat); }

.cat-tab__name {
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink);
  transition: color var(--dur-2) var(--ease);
}
.on-ink .cat-tab__name { color: var(--cream); }
.cat-tab[aria-selected="true"] .cat-tab__name { color: var(--cat); }

.cat-tab__swatch {
  width: .55rem; height: .55rem;
  border-radius: 1px;
  background: var(--cat);
  opacity: .48;
  transition: opacity var(--dur-2) var(--ease);
  flex: none;
}
.cat-tab[aria-selected="true"] .cat-tab__swatch,
.cat-tab:hover .cat-tab__swatch { opacity: 1; }

@media (max-width: 699px) {
  .cat-tab { flex: 0 0 auto; }
  /* Fade the trailing edge so it reads as scrollable */
  .cat-tabs {
    -webkit-mask-image: linear-gradient(to right, #000 82%, transparent 100%);
    mask-image: linear-gradient(to right, #000 82%, transparent 100%);
  }
}

/* --- Panel --------------------------------------------------------------- */
.cat-panel { display: none; padding-block-start: clamp(2rem, 1rem + 3.5vw, 4rem); }
.cat-panel[data-active="true"] { display: block; }

.cat-panel__head {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: var(--sp-2);
  align-items: baseline;
  margin-block-end: clamp(1.75rem, 1rem + 2.5vw, 3rem);
}
.cat-panel__title { grid-column: 1 / 6; }
.cat-panel__desc  { grid-column: 6 / 11; color: var(--muted); }
.on-ink .cat-panel__desc { color: var(--muted-dark); }
@media (max-width: 899px) {
  .cat-panel__title, .cat-panel__desc { grid-column: 1 / -1; }
}

.cat-panel__title h3 {
  font-size: clamp(1.75rem, 1.2rem + 2.4vw, 3rem);
  letter-spacing: -.026em;
  color: var(--cat);
  line-height: 1;
}
.cat-panel__kicker {
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-block-end: .7rem;
}
.cat-panel__kicker span:last-child {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}
.on-ink .cat-panel__kicker span:last-child { color: var(--muted-dark); }

/* Entrance when a category is chosen */
.cat-panel[data-active="true"] .deck__item {
  animation: dealIn 620ms var(--ease-out) both;
  animation-delay: calc(var(--i) * 55ms);
}
@keyframes dealIn {
  from { opacity: 0; transform: translate3d(0, 26px, 0) rotate(0deg) scale(.97); }
}
@media (prefers-reduced-motion: reduce) {
  .cat-panel[data-active="true"] .deck__item { animation: none; }
}


/* --------------------------------------------------------------------------
   3a. REAL CARD ARTWORK
   The supplied product artwork, shown at its true 1571:1121 proportions.
   The image is never cropped, recoloured or resampled in content - the page
   supplies the depth (shadow, perspective, lift); the artwork stays untouched.
   -------------------------------------------------------------------------- */
.card-photo {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1571 / 1121;
  border-radius: clamp(5px, .55vw, 10px);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--sh-card);
}
.card-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;   /* container matches the artwork ratio - never crops */
}

/* --------------------------------------------------------------------------
   3b. THE SINGLE CARD STAGE
   One representative card per category, front and back.
   -------------------------------------------------------------------------- */
.card-single {
  display: grid;
  place-items: center;
  perspective: 2400px;
  padding-block: clamp(.5rem, 1.5vw, 1.75rem);
}
.card-single .card-flip {
  width: min(100%, var(--card-max, 44rem));
}
@media (hover: hover) and (pointer: fine) {
  .card-single .card-flip:hover .card-photo,
  .card-single .card-flip:focus-visible .card-photo { box-shadow: var(--sh-3); }
  .card-single .card-flip:hover .card-flip__inner { transform: translateY(-6px); }
  .card-single .card-flip[aria-pressed="true"]:hover .card-flip__inner {
    transform: translateY(-6px) rotateY(180deg);
  }
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: .4rem 1rem;
  margin-block-start: clamp(1rem, .7rem + .9vw, 1.5rem);
  font-size: var(--fs-xs);
  color: var(--muted);
}
.on-ink .card-meta { color: var(--muted-dark); }
.card-meta__side {
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: var(--fs-label);
  color: var(--cat);
}

/* --------------------------------------------------------------------------
   6. CARD ANATOMY DIAGRAM - large, annotated, for the product page
   -------------------------------------------------------------------------- */
.anatomy {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: var(--sp-4);
  align-items: center;
}
.anatomy__card { grid-column: 1 / 7; }
.anatomy__list { grid-column: 8 / 13; }
@media (max-width: 899px) {
  .anatomy__card { grid-column: 1 / -1; max-width: 30rem; margin-inline: auto; }
  .anatomy__list { grid-column: 1 / -1; }
}

/* The real card, front and back, each captioned */
.anat-figure {
  display: grid;
  gap: .55rem;
  margin: 0;
}
.anat-figure .card-photo + .anat-figure__label { margin-block-start: clamp(.9rem, .5rem + 1.2vw, 1.9rem); }
.anat-figure__label { margin: 0; }
.anat-figure__side {
  display: inline-block;
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cat);
  padding-block-end: .35rem;
  border-block-end: 2px solid var(--cat);
}

/* "On the front" / "On the back" dividers in the annotation column */
.anat-group {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-block-start: clamp(1.5rem, 1rem + 1.4vw, 2.25rem);
  margin-block-end: .35rem;
}
.anat-group:first-child { margin-block-start: 0; }
.on-ink .anat-group { color: var(--muted-dark); }
.anat-item__text em { font-style: normal; font-weight: 600; color: var(--ink); }
.on-ink .anat-item__text em { color: var(--cream); }

.anat-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  column-gap: 1.15rem;
  padding-block: clamp(.95rem, .7rem + .9vw, 1.35rem);
  border-block-start: 1px solid var(--line);
}
.anat-item:last-child { border-block-end: 1px solid var(--line); }
.on-ink .anat-item { border-block-start-color: var(--line-dark); }
.on-ink .anat-item:last-child { border-block-end-color: var(--line-dark); }

.anat-item__num {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--brand-deep);
  font-variant-numeric: tabular-nums;
  padding-block-start: .35em;
}
.on-ink .anat-item__num { color: var(--brand-lift); }
.anat-item__title { font-size: var(--fs-h4); font-weight: 600; margin-block-end: .3rem; }
.anat-item__text { font-size: var(--fs-sm); color: var(--muted); line-height: 1.55; }
.on-ink .anat-item__text { color: var(--muted-dark); }

/* --------------------------------------------------------------------------
   7. BILINGUAL - English / Español
   -------------------------------------------------------------------------- */
.bilingual {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  row-gap: clamp(2rem, 1rem + 4vw, 3.5rem);
  align-items: center;
}
.bilingual__copy  { grid-column: 1 / 6; }
.bilingual__stage { grid-column: 7 / -1; }
@media (max-width: 899px) {
  .bilingual__copy, .bilingual__stage { grid-column: 1 / -1; }
}

/* Purely visual edition toggle - no translated content is implied */
.lang-toggle {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  padding: 3px;
  gap: 2px;
  background: color-mix(in srgb, var(--paper) 55%, transparent);
}
.on-ink .lang-toggle { border-color: var(--line-dark); background: transparent; }

.lang-toggle__btn {
  padding: .55rem 1.15rem;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--muted);
  transition: background-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}
.on-ink .lang-toggle__btn { color: var(--muted-dark); }
.lang-toggle__btn[aria-pressed="true"] {
  background: var(--brand-deep);
  color: var(--cream);
}
.on-ink .lang-toggle__btn[aria-pressed="true"] { background: var(--cream); color: var(--ink); }

/* Two editions stacked like a real pair of cards on a desk. The toggle brings
   one forward; the other stays visible behind it so the comparison reads at a
   glance. Rotation lives on the card itself, never on the caption. */
.editions {
  position: relative;
  display: grid;
  place-items: center;
  perspective: 2400px;
  padding-block: clamp(1rem, .5rem + 2vw, 2.25rem);
}
.edition {
  grid-area: 1 / 1;
  width: min(100%, clamp(15rem, 8rem + 32vw, 29rem));
  transition: transform 700ms var(--ease-out), opacity 500ms var(--ease);
}
.edition .card-flip { width: 100%; }
.edition .card-photo { transition: transform 700ms var(--ease-out); }

.edition[data-edition="en"] { transform: translate3d(-7%, -9%, 0); z-index: 3; }
.edition[data-edition="es"] { transform: translate3d(7%,  9%, 0); z-index: 2; }
.edition[data-edition="en"] .card-photo { transform: rotate(-2.4deg); }
.edition[data-edition="es"] .card-photo { transform: rotate(2.4deg); }

/* The edition sitting behind is dimmed and non-interactive, so only the
   selected language can be flipped. */
.editions[data-active="es"] .edition[data-edition="en"],
.editions[data-active="en"] .edition[data-edition="es"] {
  z-index: 2;
  opacity: .5;
  pointer-events: none;
}
.editions[data-active="es"] .edition[data-edition="en"] .card-photo {
  transform: rotate(-2.4deg) scale(.94);
}
.editions[data-active="en"] .edition[data-edition="es"] .card-photo {
  transform: rotate(2.4deg) scale(.94);
}
.editions[data-active="es"] .edition[data-edition="es"],
.editions[data-active="en"] .edition[data-edition="en"] {
  z-index: 3;
  opacity: 1;
  pointer-events: auto;
}

/* One upright caption for the whole stage - it names the edition currently on
   top, so nothing has to be printed over the artwork. */
.editions-caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: .35rem .85rem;
  margin-block-start: clamp(.75rem, .5rem + .8vw, 1.35rem);
  text-align: center;
}
.editions-caption__lang {
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand-deep);
}
.on-ink .editions-caption__lang { color: var(--brand-lift); }
.editions-caption__title { font-size: var(--fs-sm); color: var(--muted); }
.on-ink .editions-caption__title { color: var(--muted-dark); }
.editions-caption__side {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}
.on-ink .editions-caption__side { color: var(--muted-dark); }

@media (max-width: 599px) {
  .edition { width: min(90%, 21rem); }
  .edition[data-edition="en"] { transform: translate3d(-5%, -7%, 0); }
  .edition[data-edition="es"] { transform: translate3d(5%, 7%, 0); }
}

/* The Spanish availability callout - a feature, not a footnote */
.lang-flag {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .4rem .9rem .4rem .55rem;
  border-radius: var(--r-pill);
  background: color-mix(in srgb, var(--brand) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand-deep) 26%, transparent);
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brand-deep);
}
.on-ink .lang-flag {
  background: color-mix(in srgb, var(--brand) 18%, transparent);
  border-color: color-mix(in srgb, var(--brand-lift) 40%, transparent);
  color: var(--brand-lift);
}
.lang-flag__pair {
  display: inline-flex;
  gap: .3rem;
  padding: .2rem .45rem;
  border-radius: var(--r-pill);
  background: var(--brand-deep);
  color: var(--cream);
  font-size: .62em;
  letter-spacing: .1em;
}
.on-ink .lang-flag__pair { background: var(--brand-lift); color: var(--ink); }