/* ==========================================================================
   TOKENS
   ========================================================================== */
:root {
  --color-bg:            #fafaf7;
  --color-surface:       #ffffff;
  --color-ink:           #111111;
  --color-ink-mute:      #555555;
  --color-ink-faint:     #999999;
  --color-line:          #d8d8d3;
  --color-line-soft:     #e8e8e3;
  --color-accent:        #3a5a40;
  --color-accent-soft:   #e3ebe3;
  --color-pending-soft:  #eeeeea;
  --color-warm:          #a8481c;
  --color-warm-soft:     #f7e8dd;
  --color-highlight:     #ffe100;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;

  /* Escala tipográfica: un tamaño por función, de mayor a menor jerarquía */
  --fs-hero:     clamp(2rem, 5vw, 3rem);          /* h1: título de página (32–48) */
  --fs-numeral:  clamp(2rem, 4vw, 3rem);          /* números de sección y KPIs (32–48) */
  --fs-h2:       clamp(1.5rem, 2.6vw, 2.125rem);  /* título de sección (24–34) */
  --fs-h3:       clamp(1.25rem, 2vw, 1.5rem);     /* subtítulo de apartado (20–24) */
  --fs-lead:     clamp(1.125rem, 2vw, 1.375rem);  /* entradilla bajo el h1 (18–22) */
  --fs-body:     1.0625rem;                       /* texto, también dentro de recuadros (17) */
  --fs-small:    0.875rem;                        /* tablas, metadatos, texto secundario (14) */
  --fs-eyebrow:  0.75rem;                         /* línea superior sobre un titular (12) */
  --fs-micro:    0.8125rem;                       /* etiquetas en mayúsculas y pies de figura (13) */

  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;

  --lh-tight:    1.15;
  --lh-snug:     1.35;
  --lh-body:     1.65;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 7rem;
  --space-8: 3.5rem;

  --measure:      68ch;
  --page-max:     1100px;
  --page-pad:     clamp(1.25rem, 5vw, 6rem);

  --radius:        2px;
  --radius-image:  16px;

  --transition:   150ms ease;
  --border-hair:  1px solid var(--color-line);
}

/* ==========================================================================
   BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: var(--fw-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  margin: 0;
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-hero); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); }

p { margin: 0 0 var(--space-3); max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
a:hover { border-bottom-color: currentColor; }
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-bottom-color: transparent;
}

strong { font-weight: var(--fw-medium); }
em { font-style: italic; }

ul, ol {
  margin: 0 0 var(--space-3);
  padding-left: 1.25rem;
  max-width: var(--measure);
}
li { margin-bottom: var(--space-2); }
li > ul { margin-top: var(--space-2); margin-bottom: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  font-size: var(--fs-body);
}
th, td {
  text-align: left;
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
  border-bottom: var(--border-hair);
  vertical-align: top;
}
th {
  font-weight: var(--fw-medium);
  color: var(--color-ink-mute);
  font-size: var(--fs-small);
  padding-bottom: var(--space-2);
}
tr:first-child th { border-top: var(--border-hair); }

img { max-width: 100%; height: auto; display: block; }

::selection {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

/* ==========================================================================
   COMPONENTS
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--page-pad);
}

.section { padding: var(--space-8) 0; }
@media (min-width: 768px) { .section { padding: var(--space-7) 0; } }

.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  border-bottom: var(--border-hair);
  padding-bottom: var(--space-3);
}
.section__num {
  font-size: var(--fs-numeral);
  font-weight: var(--fw-light);
  color: var(--color-accent);
  line-height: 1;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}
.section__title {
  font-size: var(--fs-h2);
  font-weight: var(--fw-medium);
  margin: 0;
}
.section h3 { margin-top: 5rem; margin-bottom: var(--space-3); }
.h3__num { margin-right: var(--space-1); color: var(--color-accent); }
.section__header + h3 { margin-top: var(--space-5); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-bg);
  border-bottom: var(--border-hair);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}
.site-header__left { display: flex; align-items: center; gap: var(--space-2); }
.site-header__back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-left: -0.5rem;
  border-bottom: none;
  border-radius: 50%;
  color: var(--color-ink-mute);
  transition: color var(--transition), background var(--transition);
}
.site-header__back:hover { color: var(--color-ink); background: var(--color-line-soft); border-bottom: none; }
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-medium);
  letter-spacing: -0.01em;
  border-bottom: none;
}
.site-header__avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  object-fit: cover;
  object-position: 50% 30%;
  background: var(--color-line-soft);
}
.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  color: var(--color-ink-faint);
}
.lang-switch__item--active { color: var(--color-ink); font-weight: var(--fw-medium); }
a.lang-switch__item { border-bottom: none; }
@media (hover: hover) { a.lang-switch__item:hover { color: var(--color-ink); } }
a.lang-switch__item:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }

.hero { padding: var(--space-5) 0 var(--space-6); }
.hero__title { max-width: 24ch; margin-bottom: var(--space-3); }
.hero__subtitle {
  max-width: 40ch;
  margin: 0 0 var(--space-5);
  font-size: var(--fs-lead);
  line-height: var(--lh-snug);
  color: var(--color-ink-mute);
}
.hero__figure { margin-top: var(--space-6); }

.hero-intro { padding-top: var(--space-6); }
/* Mismo estilo que el titular de la portada: los dos son el h1 de su página */
.hero-intro .hero__title {
  max-width: none;
  margin-bottom: var(--space-3);
  font-size: var(--fs-hero);
  font-weight: var(--fw-regular);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.hero-intro .hero__subtitle { margin-bottom: 0; }

.kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  list-style: none;
  border-top: var(--border-hair);
  border-bottom: var(--border-hair);
}
.kpis li { padding: var(--space-3) var(--space-3) var(--space-3) 0; }
.kpis li + li { padding-left: var(--space-3); border-left: var(--border-hair); }
.kpis__value {
  display: block;
  font-size: var(--fs-numeral);
  font-weight: var(--fw-light);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}
.kpis__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--fs-small);
  color: var(--color-ink-mute);
}

.diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 2797 / 2014;
  border: 0;
  border-radius: var(--radius-image);
  background: transparent;
  overflow: hidden;
}
.diagram__svg { display: block; width: 100%; height: 100%; }
.diagram__box { fill: none; stroke: var(--color-ink); stroke-width: 3; }
.diagram__line { fill: none; stroke: var(--color-ink); stroke-width: 3; }
.diagram__line--warm { stroke: var(--color-warm); }
.diagram__line--dashed { stroke-dasharray: 14 12; }
.diagram__fill { fill: var(--color-ink); }
.diagram__fill--warm { fill: var(--color-warm); }
.diagram__text {
  font-family: var(--font-sans);
  font-size: 38px;
  fill: var(--color-ink);
}
.diagram__text--center { text-anchor: middle; }
.diagram__text--strong { font-weight: var(--fw-medium); letter-spacing: 0.04em; }
.diagram__text--mute { fill: var(--color-ink-mute); }
.diagram__text--warm { fill: var(--color-warm); }

.callout {
  max-width: none;
  margin: var(--space-5) 0;
  padding: var(--space-4);
  background: var(--color-warm-soft);
  border-left: 3px solid var(--color-warm);
  border-radius: var(--radius);
}
.callout__label {
  margin: 0 0 var(--space-2);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-warm);
}
.callout__text {
  margin: 0;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-ink);
}

.spec { max-width: 100%; margin: 0 0 var(--space-6); }
.role { margin: 0 0 var(--space-6); }
.role .spec__label { margin-bottom: var(--space-3); }
.role__lead { font-size: var(--fs-body); color: var(--color-ink); }

.spec__label {
  max-width: none;
  margin: 0;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-hair);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.spec table { margin: 0; }
.spec .table-decisions td { padding-top: var(--space-2); padding-bottom: var(--space-2); }

.table-decisions { font-size: var(--fs-small); }
.table-decisions th,
.table-decisions td { padding: var(--space-3) var(--space-3) var(--space-3) 0; }
.table-decisions th:first-child,
.table-decisions td:first-child {
  width: 30%;
  font-weight: var(--fw-medium);
  color: var(--color-ink);
}
.table-decisions th:not(:first-child),
.table-decisions td:not(:first-child) { color: var(--color-ink-mute); }

.table-matrix th:not(:first-child),
.table-matrix td:not(:first-child) { width: 35%; padding-left: var(--space-3); }
.callout--accent {
  background: var(--color-accent-soft);
  border-left-color: var(--color-accent);
}
.callout--accent .callout__label { color: var(--color-accent); }
.callout--info {
  background: var(--color-pending-soft);
  border-left-color: var(--color-ink-faint);
}
.callout--info .callout__label { color: var(--color-ink-mute); }
.callout--pending {
  margin-top: var(--space-6);
  background: var(--color-pending-soft);
  border-left-color: var(--color-ink-faint);
}
.callout--pending .callout__label { color: var(--color-ink-mute); }
.callout__list { margin: 0 0 var(--space-3); padding-left: 1.1rem; }
.callout__list li { margin-bottom: var(--space-2); }
.callout__note { margin: 0; font-size: var(--fs-small); color: var(--color-ink-mute); }

.lessons { max-width: var(--measure); }
.lessons li { margin-bottom: var(--space-3); padding-left: var(--space-1); }

.table-matrix__sub { font-weight: var(--fw-regular); color: var(--color-ink-mute); }

.case-figure {
  margin: var(--space-5) 0;
  max-width: 100%;
}
.case-figure img {
  width: 100%;
  height: auto;
  border: 0;
  background: var(--color-surface);
  border-radius: var(--radius-image);
  overflow: hidden;
}
.case-figure__caption {
  font-size: var(--fs-micro);
  color: var(--color-ink-mute);
  font-style: italic;
  margin-top: var(--space-2);
  max-width: none;
}

.image-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
@media (min-width: 768px) {
  .image-pair { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
}
.image-pair__item {
  margin: 0;
}
.image-pair__item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-image);
}
.image-pair__when {
  font-style: normal;
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  margin-right: var(--space-1);
}
.image-pair__when--after { color: var(--color-accent); }
.image-pair__caption {
  font-size: var(--fs-micro);
  color: var(--color-ink-mute);
  font-style: italic;
  margin-top: var(--space-2);
  max-width: none;
}


/* Portada: lista de proyectos */
.home { max-width: calc(48rem + 2 * var(--page-pad)); padding-top: var(--space-6); }
.home__intro { margin-bottom: var(--space-6); }
.home__eyebrow {
  text-wrap: balance;
  max-width: none;
  margin: 0 0 var(--space-3);
  font-size: var(--fs-eyebrow);
  font-weight: var(--fw-medium);
  line-height: 1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.home__headline {
  text-wrap: balance;
  max-width: none;
  margin: 0 0 var(--space-3);
  font-size: var(--fs-hero);
  font-weight: var(--fw-regular);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.home__lead {
  max-width: none;
  margin: 0;
  font-size: var(--fs-lead);
  line-height: var(--lh-snug);
  color: var(--color-ink-mute);
}
.home__title {
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-hair);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.project-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: none;
}
.project-card {
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid transparent;
  border-radius: var(--radius-image);
  transition: border-color var(--transition);
}
.project-card:hover { border-color: var(--color-line); }
.project-card__media {
  display: block;
  overflow: hidden;
  background: var(--color-pending-soft);
}
.project-card__img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  object-position: top center;
  transition: transform 500ms ease;
}
.project-card__body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
}
.project-card__head { display: flex; flex-direction: column; gap: var(--space-1); }
.project-card__tag {
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}
.project-card__name {
  font-size: var(--fs-h3);
  font-weight: var(--fw-medium);
  line-height: 2rem;
  letter-spacing: -0.01em;
}
.project-card__meta,
.project-card__desc {
  font-size: var(--fs-small);
  line-height: 1.5rem;
  color: var(--color-ink-mute);
}
.project-card__foot { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-3); }
.project-card__chevron {
  flex: none;
  color: var(--color-ink-faint);
  transition: transform var(--transition), color var(--transition);
}
.project-card:hover .project-card__chevron { color: var(--color-accent); transform: translateX(var(--space-1)); }
@media (min-width: 640px) {
  .project-card { grid-template-columns: 20rem 1fr; min-height: 15rem; }
  .project-card__img { aspect-ratio: auto; }
}
@media (hover: hover) {
  .project-card:hover .project-card__img,
  .project-card:focus-visible .project-card__img { transform: scale(1.02); }
}
@media (prefers-reduced-motion: reduce) {
  .project-card__img, .project-card__chevron { transition: none; }
  .project-card:hover .project-card__img, .project-card:hover .project-card__chevron { transform: none; }
}

/* Animaciones: entrada en cascada, aparición al hacer scroll y progreso de lectura */
@keyframes enter {
  from { opacity: 0; transform: translateY(1rem); }
  to   { opacity: 1; transform: none; }
}
.home__eyebrow, .home__headline, .hero-intro .hero__title,
.home__lead, .hero-intro .hero__subtitle,
.home__title, .kpis,
.project-list > li, .hero__figure {
  animation: enter 560ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.home__headline, .hero-intro .hero__title { animation-delay: 80ms; }
.home__lead, .hero-intro .hero__subtitle { animation-delay: 160ms; }
.home__title, .kpis { animation-delay: 240ms; }
.project-list > li, .hero__figure { animation-delay: 320ms; }

.reveal-ready .reveal {
  transition: opacity 560ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 560ms cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal-ready .reveal:not(.is-in) { opacity: 0; transform: translateY(1rem); }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  height: 4px;
  /* Amarillo del jersey. Es decorativa (aria-hidden): la posición de lectura ya la da el scroll
     del navegador, así que no necesita el contraste 3:1 de WCAG 1.4.11. */
  background: var(--color-highlight);
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .home__eyebrow, .home__headline, .hero-intro .hero__title, .home__lead, .hero-intro .hero__subtitle,
  .home__title, .kpis, .project-list > li, .hero__figure { animation: none; }
}

/* Transición entre páginas: cada chevron anima en su sitio, sin cruzar el contenido.
   Al entrar en el caso, el de la tarjeta sale hacia delante y la flecha de volver llega a la barra;
   al volver, el recorrido se invierte. */
@view-transition { navigation: auto; }
.site-header { view-transition-name: site-header; }
.project-card__chevron { view-transition-name: card-chevron; }
.site-header__back { view-transition-name: back-chevron; }
::view-transition-group(root) { animation-duration: 320ms; }
::view-transition-old(card-chevron) { animation: chevron-exit-forward 280ms cubic-bezier(0.4, 0, 1, 1) both; }
::view-transition-new(card-chevron) { animation: chevron-enter-forward 360ms cubic-bezier(0.2, 0.7, 0.2, 1) 160ms both; }
::view-transition-old(back-chevron) { animation: chevron-exit-back 280ms cubic-bezier(0.4, 0, 1, 1) both; }
::view-transition-new(back-chevron) { animation: chevron-enter-back 360ms cubic-bezier(0.2, 0.7, 0.2, 1) 160ms both; }
@keyframes chevron-exit-forward { to { opacity: 0; transform: translateX(var(--space-3)); } }
@keyframes chevron-enter-forward { from { opacity: 0; transform: translateX(calc(-1 * var(--space-2))); } }
@keyframes chevron-exit-back { to { opacity: 0; transform: translateX(calc(-1 * var(--space-3))); } }
@keyframes chevron-enter-back { from { opacity: 0; transform: translateX(var(--space-2)); } }

/* Al pulsar la tarjeta, el chevron avanza; al llegar al caso, la flecha de volver hace un gesto hacia atrás */
.project-card:active .project-card__chevron { transform: translateX(var(--space-2)); }
@keyframes back-nudge {
  0%, 100% { transform: none; }
  40% { transform: translateX(calc(-1 * var(--space-1))); }
  70% { transform: translateX(2px); }
}
.site-header__back svg { animation: back-nudge 640ms cubic-bezier(0.2, 0.7, 0.2, 1) 720ms both; }

@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }
  .site-header__back svg { animation: none; }
  .project-card:active .project-card__chevron { transform: none; }
}

/* Índice de secciones: píldora bajo la barra superior que muestra la sección actual */
/* Al saltar desde el índice, la cabecera de sección queda justo bajo la píldora (html ya tiene 5rem de scroll-padding) */
.section { scroll-margin-top: 0.5rem; }
@media (min-width: 768px) { .section { scroll-margin-top: -2.5rem; } }
.toc {
  gap: var(--space-2);
  position: fixed;
  top: calc(4.5rem + 1px + var(--space-3));
  left: 0;
  right: 0;
  z-index: 15;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-3);
  pointer-events: none;
  transition: transform 250ms ease, opacity 250ms ease;
}
.js .toc:not(.is-visible) { opacity: 0; transform: translateY(calc(-1 * var(--space-2))); }
.js .toc:not(.is-visible) .toc__button,
.js .toc:not(.is-visible) .toc__gallery { pointer-events: none; }
.toc__button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 1 auto;
  min-width: 0;
  max-width: calc(100% - 3rem);
  min-height: 2.5rem;
  padding: 0 var(--space-3);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: var(--border-hair);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.08);
  font: inherit;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  cursor: pointer;
  pointer-events: auto;
  transition: border-color var(--transition);
}
.toc__gallery {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: var(--border-hair);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.08);
  color: var(--color-ink);
  cursor: pointer;
  pointer-events: auto;
  transition: border-color var(--transition);
}
@media (hover: hover) {
  .toc__button:hover, .toc__gallery:hover { border-color: var(--color-ink-faint); }
}
/* Sin espera por el gesto de doble toque para hacer zoom */
.toc__button, .toc__gallery, .toc__link, .drawer__close, .drawer__thumb, .drawer__goto { touch-action: manipulation; }
/* En móvil la píldora ocupa el ancho disponible, así el botón de galería no se desplaza al cambiar de sección */
@media (max-width: 639px) {
  .toc__button { flex: 1 1 auto; justify-content: space-between; }
}
.toc__gallery:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.toc__button:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.toc__current { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.toc__button svg { flex: none; color: var(--color-ink-mute); }

.toc__panel {
  position: fixed;
  inset: auto 0 0 0;
  width: 100%;
  max-width: none;
  max-height: 70vh;
  margin: 0;
  padding: var(--space-4) var(--space-3) calc(var(--space-4) + env(safe-area-inset-bottom));
  overflow-y: auto;
  background: var(--color-surface);
  border: var(--border-hair);
  border-radius: var(--space-4) var(--space-4) 0 0;
  box-shadow: 0 -8px 32px rgba(17, 17, 17, 0.12);
  color: var(--color-ink);
}
.toc__panel::backdrop { background: rgba(17, 17, 17, 0.24); }
.toc__panel:popover-open { animation: sheet-in 280ms cubic-bezier(0.2, 0.7, 0.2, 1); }
@keyframes sheet-in { from { opacity: 0; transform: translateY(var(--space-4)); } }
@media (min-width: 640px) {
  .toc__panel {
    inset: calc(4.5rem + 1px + var(--space-3) + 2.5rem + var(--space-2)) auto auto 50%;
    width: 24rem;
    max-height: 70vh;
    padding: var(--space-3) var(--space-2);
    border-radius: var(--radius-image);
    box-shadow: 0 16px 32px rgba(17, 17, 17, 0.12);
    transform: translateX(-50%);
  }
  .toc__panel::backdrop { background: transparent; }
  .toc__panel:popover-open { animation: popover-in 200ms cubic-bezier(0.2, 0.7, 0.2, 1); }
  @keyframes popover-in { from { opacity: 0; transform: translate(-50%, calc(-1 * var(--space-2))); } }
}
.toc__title {
  margin: 0 var(--space-2) var(--space-2);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.toc__list { list-style: none; margin: 0; padding: 0; max-width: none; }
.toc__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 3rem;
  padding: var(--space-1) var(--space-2);
  border-bottom: none;
  border-radius: var(--space-2);
  font-size: var(--fs-small);
  line-height: 1.5rem;
  color: var(--color-ink);
  transition: background var(--transition);
}
@media (hover: hover) { .toc__link:hover { background: var(--color-pending-soft); border-bottom: none; } }
.toc__num {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--space-2);
  background: var(--color-pending-soft);
  font-size: var(--fs-small);
  font-weight: var(--fw-light);
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
}
.toc__link[aria-current="true"] { font-weight: var(--fw-medium); }
.toc__link[aria-current="true"] .toc__num { background: var(--color-accent-soft); font-weight: var(--fw-medium); }
@media (prefers-reduced-motion: reduce) {
  .toc, .toc__panel:popover-open { transition: none; animation: none; }
}

/* Cierre del caso: la píldora inferior se estira hasta ocupar la pantalla en modo oscuro */
.closing {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
  margin-top: var(--space-7);
  padding: var(--space-7) var(--page-pad) var(--space-4);
  background: var(--color-ink);
  color: var(--color-bg);
}
.js .closing { transition: clip-path 640ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.js .closing:not(.is-open) { clip-path: var(--closing-clip, inset(100% 50% 0 50%)); }
.js .closing.is-open { clip-path: inset(0 round 0); }
.closing__inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  text-align: center;
}
.js .closing__inner, .js .closing__footer { transition: opacity 400ms ease, transform 400ms ease; }
.js .closing:not(.is-open) .closing__inner,
.js .closing:not(.is-open) .closing__footer { opacity: 0; transform: translateY(var(--space-3)); }
.js .closing.is-open .closing__inner,
.js .closing.is-open .closing__footer { transition-delay: 320ms; }
.closing__title {
  max-width: 16ch;
  margin: 0;
  font-size: var(--fs-hero);
  font-weight: var(--fw-regular);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-bg);
}
.closing__lead {
  max-width: 34ch;
  margin: 0;
  font-size: var(--fs-lead);
  line-height: var(--lh-snug);
  color: rgba(250, 250, 247, 0.72);
}
.closing__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.closing__links {
  display: flex;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--fs-small);
  color: rgba(250, 250, 247, 0.56);
}
.closing__links a { color: rgba(250, 250, 247, 0.8); }
.closing__footer {
  max-width: none;
  margin: var(--space-6) 0 0;
  font-size: var(--fs-micro);
  text-align: center;
  color: rgba(250, 250, 247, 0.48);
}
.btn--highlight { background: var(--color-highlight); border-color: var(--color-highlight); color: var(--color-ink); }
.btn--highlight:hover { background: var(--color-bg); border-color: var(--color-bg); color: var(--color-ink); }
.btn--on-dark { background: transparent; border-color: rgba(250, 250, 247, 0.32); color: var(--color-bg); }
.btn--on-dark:hover { border-color: var(--color-bg); color: var(--color-bg); }

/* Al llegar al cierre, la barra superior también pasa a oscuro y se ocultan la píldora y el índice */
.site-header { transition: background 400ms ease, border-color 400ms ease, color 400ms ease; }
.at-end .site-header { background: var(--color-ink); border-bottom-color: rgba(250, 250, 247, 0.12); color: var(--color-bg); }
.at-end .site-header__back { color: rgba(250, 250, 247, 0.72); }
.at-end .site-header__back:hover { background: rgba(250, 250, 247, 0.08); color: var(--color-bg); }
.at-end .lang-switch__item--active { color: var(--color-bg); }
.at-end .cta-bar { opacity: 0; transition: none; }
.at-end .cta-bar__inner { pointer-events: none; }
.at-end .toc { opacity: 0; }
.at-end .toc__button, .at-end .toc__gallery { pointer-events: none; }
@media (prefers-reduced-motion: reduce) {
  .js .closing, .js .closing__inner, .js .closing__footer, .site-header { transition: none; }
}

/* Galería: drawer claro con la lista vertical de imágenes */
.case-figure, .image-pair__item { scroll-margin-top: 9rem; }
html:has(.drawer:popover-open), html:has(.viewer:popover-open) { overflow: hidden; }
.drawer {
  position: fixed;
  inset: auto 0 0 0;
  width: 100%;
  max-width: none;
  height: 85svh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: var(--border-hair);
  border-radius: var(--space-4) var(--space-4) 0 0;
  background: var(--color-surface);
  box-shadow: 0 -8px 32px rgba(17, 17, 17, 0.12);
  color: var(--color-ink);
}
.drawer:popover-open { display: flex; flex-direction: column; }

/* Abrir y cerrar: la salida es más corta y acelera al final; la entrada frena suave al llegar */
.drawer, .drawer::backdrop, .viewer, .viewer::backdrop {
  transition-property: opacity, transform, background-color, overlay, display;
  transition-duration: 220ms;
  transition-timing-function: cubic-bezier(0.4, 0, 1, 1);
  transition-behavior: allow-discrete;
}
.drawer:popover-open, .drawer:popover-open::backdrop, .viewer:popover-open, .viewer:popover-open::backdrop {
  transition-duration: 380ms;
  transition-timing-function: cubic-bezier(0.2, 0.7, 0.2, 1);
}
.drawer { opacity: 0; transform: translateY(100%); }
.drawer:popover-open { opacity: 1; transform: none; }
@starting-style { .drawer:popover-open { opacity: 0; transform: translateY(100%); } }
.drawer::backdrop { background-color: rgba(17, 17, 17, 0); }
.drawer:popover-open::backdrop { background-color: rgba(17, 17, 17, 0.24); }
@starting-style { .drawer:popover-open::backdrop { background-color: rgba(17, 17, 17, 0); } }
@media (min-width: 640px) {
  .drawer {
    inset: var(--space-3) var(--space-3) var(--space-3) auto;
    width: 28rem;
    height: auto;
    border-radius: var(--radius-image);
    box-shadow: 0 16px 32px rgba(17, 17, 17, 0.12);
  }
  .drawer { transform: translateX(calc(100% + var(--space-3))); }
  .drawer:popover-open { transform: none; }
  @starting-style { .drawer:popover-open { transform: translateX(calc(100% + var(--space-3))); } }
  .drawer:popover-open::backdrop { background-color: rgba(17, 17, 17, 0.08); }
  .drawer__bar { padding: var(--space-4) calc(var(--space-4) + var(--space-1)) var(--space-3) calc(var(--space-4) + var(--space-2)); }
  .drawer__list { padding-inline: calc(var(--space-4) + var(--space-2)); }
}
.drawer__bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-4) var(--space-3);
}
.drawer__title {
  max-width: none;
  margin: 0;
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.drawer__count { margin-left: var(--space-1); color: var(--color-ink-faint); font-variant-numeric: tabular-nums; }
.drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: var(--border-hair);
  border-radius: 50%;
  color: var(--color-ink);
  cursor: pointer;
  transition: border-color var(--transition);
}
@media (hover: hover) { .drawer__close:hover { border-color: var(--color-ink-faint); } }
.drawer__close:focus-visible, .drawer__thumb:focus-visible, .drawer__goto:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; }
.drawer__list { flex: 1; min-height: 0; overflow-y: auto; padding: var(--space-2) var(--space-4) var(--space-6); overscroll-behavior: contain; }
.drawer__group {
  margin: 4rem 0 var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-hair);
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.drawer__group:first-child { margin-top: 0; }
.drawer__item { margin: 0 0 3rem; }
.drawer__item:last-child { margin-bottom: 0; }
.drawer__thumb {
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  background: var(--color-pending-soft);
  border: 0;
  border-radius: var(--radius-image);
  cursor: zoom-in;
}
.drawer__thumb img, .drawer__thumb .diagram {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0;
  transition: transform 500ms ease;
}
.drawer__thumb .diagram { color: var(--color-ink); }
.drawer__meta { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-2); margin-top: var(--space-3); }
.drawer__when {
  padding: 0 var(--space-2);
  border: var(--border-hair);
  border-radius: 999px;
  font-size: var(--fs-micro);
  font-weight: var(--fw-medium);
  line-height: 1.25rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-mute);
}
.drawer__when--after { border-color: var(--color-accent); color: var(--color-accent); }
.drawer__name { margin: 0; font-size: var(--fs-h3); font-weight: var(--fw-medium); line-height: 2rem; letter-spacing: -0.01em; color: var(--color-ink); }
.drawer__caption { max-width: none; margin: 0; font-size: var(--fs-body); line-height: 1.75rem; color: var(--color-ink-mute); }
.drawer__goto {
  display: inline-block;
  margin-top: var(--space-1);
  font-size: var(--fs-small);
  line-height: 1.5rem;
  color: var(--color-accent);
}
@media (hover: hover) { .drawer__thumb:hover img, .drawer__thumb:hover .diagram { transform: scale(1.02); } }

/* Visor claro para ampliar una imagen */
.viewer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  color: var(--color-ink);
}
.viewer:popover-open { display: flex; flex-direction: column; align-items: center; }
.viewer { opacity: 0; }
.viewer:popover-open { opacity: 1; }
@starting-style { .viewer:popover-open { opacity: 0; } }
.viewer__stage > * { transition: transform 380ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.viewer:not(:popover-open) .viewer__stage > * { transform: scale(0.96); transition-duration: 220ms; }
@starting-style { .viewer:popover-open .viewer__stage > * { transform: scale(0.96); } }
.viewer__close { position: absolute; top: var(--space-3); right: var(--space-3); z-index: 1; background: var(--color-surface); }
.viewer__stage {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-3) var(--space-2);
  overflow: auto;
  cursor: zoom-in;
}
.viewer__stage img, .viewer__stage .diagram {
  max-width: 100%;
  max-height: calc(100svh - 15rem);
  width: auto;
  height: auto;
  border-radius: var(--radius-image);
  background: var(--color-surface);
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.08);
}
.viewer__stage .diagram { width: min(100%, 64rem); color: var(--color-ink); }
.viewer__stage.is-zoomed { align-items: flex-start; justify-content: flex-start; cursor: zoom-out; }
.viewer__stage.is-zoomed img { max-width: none; max-height: none; width: 200%; }
.viewer__text {
  flex: none;
  max-width: 40rem;
  padding: var(--space-3) var(--space-3) var(--space-4);
  text-align: center;
}
.viewer__title { margin: 0 0 var(--space-1); font-size: var(--fs-h3); font-weight: var(--fw-medium); line-height: 2rem; letter-spacing: -0.01em; }
.viewer__caption { max-width: none; margin: 0; font-size: var(--fs-body); line-height: 1.75rem; color: var(--color-ink-mute); }

/* Destello al llegar a una figura desde la galería */
@keyframes fig-flash {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--color-highlight) 90%, transparent); }
  30% { box-shadow: 0 0 0 8px color-mix(in srgb, var(--color-highlight) 70%, transparent); }
  100% { box-shadow: 0 0 0 8px transparent; }
}
.fig-flash img, .fig-flash .diagram { animation: fig-flash 1600ms ease-out; }

@media (prefers-reduced-motion: reduce) {
  .drawer, .drawer::backdrop, .viewer, .viewer::backdrop, .viewer__stage > * { transition: none; }
  .drawer__thumb img, .drawer__thumb .diagram { transition: none; }
  .fig-flash img, .fig-flash .diagram { animation: none; outline: 2px solid var(--color-highlight); }
}

/* Barra inferior de CTA */
body { padding-bottom: 7rem; }
body:has(.closing) { padding-bottom: 0; }
.cta-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-3) calc(var(--space-3) + env(safe-area-inset-bottom));
  pointer-events: none;
  transition: transform 250ms ease, opacity 250ms ease;
}
.js .cta-bar:not(.is-visible) {
  transform: translateY(calc(100% + var(--space-3)));
  opacity: 0;
}
.cta-bar__inner {
  display: flex;
  gap: var(--space-2);
  width: 100%;
  max-width: 32rem;
  padding: var(--space-2);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(17, 17, 17, 0.08);
  pointer-events: auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  text-align: center;
  transition: background var(--transition), color var(--transition);
}
.btn--primary { background: var(--color-ink); color: var(--color-bg); }
.btn--primary:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }
.btn--secondary { background: transparent; color: var(--color-ink); border-color: var(--color-line); }
.btn--secondary:hover { border-color: var(--color-ink); }
.cta-bar .btn { white-space: nowrap; padding: 0 var(--space-3); }
.cta-bar .btn--primary { flex: 3; }
.cta-bar .btn--secondary { flex: 2; }
.cta-bar .btn--secondary { border-color: transparent; }
.cta-bar .btn--secondary:hover { background: var(--color-line-soft); border-color: transparent; }
/* Pantallas muy estrechas (320 px): botones algo más compactos para que no se salgan de la píldora */
@media (max-width: 359px) {
  .cta-bar .btn { padding: 0 var(--space-2); font-size: var(--fs-micro); }
}
@media (prefers-reduced-motion: reduce) {
  .cta-bar { transition: none; }
}

/* Un único bloque centrado para todo el contenido del caso */
main.case { max-width: calc(48rem + 2 * var(--page-pad)); }
.hero-intro .case { max-width: 48rem; margin-inline: auto; }
.case :is(p, ul, ol) { max-width: none; }

@media (max-width: 640px) {
  .table-matrix thead, .table-stack thead { display: none; }
  .table-matrix, .table-matrix tbody, .table-matrix tr, .table-matrix td,
  .table-stack, .table-stack tbody, .table-stack tr, .table-stack td { display: block; width: 100%; }
  .table-matrix tr, .table-stack tr { padding: var(--space-3) 0; border-bottom: var(--border-hair); }
  .table-matrix td, .table-matrix td:first-child, .table-stack td, .table-stack td:first-child { width: 100%; border: 0; }
  .table-matrix td:first-child, .table-stack td:first-child { padding: 0 0 var(--space-2); }
  .table-matrix td:not(:first-child), .table-stack td:not(:first-child) { width: 100%; padding: var(--space-2) var(--space-3); }
  .table-matrix td:not(:first-child)::before, .table-stack td:not(:first-child)::before {
    content: attr(data-label);
    display: block;
    font-size: var(--fs-micro);
    font-weight: var(--fw-medium);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-ink-faint);
  }
  .table-tipologias thead { display: none; }
  .table-tipologias tr {
    display: block;
    padding: var(--space-3) 0;
    border-bottom: var(--border-hair);
  }
  .table-tipologias td {
    display: block;
    padding: 0;
    border: none;
    font-size: var(--fs-small);
  }
  .table-tipologias td::before {
    content: attr(data-label) ": ";
    color: var(--color-ink-faint);
    font-weight: var(--fw-medium);
    margin-right: var(--space-1);
  }
  .table-tipologias td + td { margin-top: var(--space-1); }
}