/* ------------------------------------------------------------
   Página de caso de estudio.
   Extiende el sistema visual de styles.css: mismo tipo de kicker
   monoespaciado, mismos contrastes papel / tinta, acento por proyecto.
------------------------------------------------------------- */

body {
  background: var(--paper);
}

.case-missing {
  display: grid;
  gap: 1.5rem;
  place-items: start;
  padding-top: 12rem;
  padding-bottom: 8rem;
}

/* ---------------------------------------------------------- Portada */

.case-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(9rem, 16vw, 13rem) 0 clamp(4rem, 8vw, 7rem);
  background: var(--ink);
  color: var(--white);
  isolation: isolate;
}

.case-hero-grid {
  position: absolute;
  z-index: -1;
  inset: 0;
  opacity: 0.5;
  background-image: linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 20%, transparent 78%);
}

.case-hero::after {
  position: absolute;
  z-index: -1;
  top: -30%;
  right: -12%;
  width: 46rem;
  height: 46rem;
  border-radius: 50%;
  opacity: 0.14;
  background: radial-gradient(circle, var(--project-color, var(--acid)), transparent 62%);
  content: "";
}

.case-hero-inner {
  display: grid;
  justify-items: start;
}

.case-back {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  color: rgba(250, 249, 245, 0.62);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: color 0.25s, gap 0.35s var(--ease-out);
}

.case-back:hover {
  gap: 1rem;
  color: var(--project-color, var(--acid));
}

.case-back i {
  font-style: normal;
}

.case-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 1.75rem;
  color: rgba(250, 249, 245, 0.6);
  font-family: Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.case-eyebrow i {
  color: rgba(250, 249, 245, 0.3);
  font-style: normal;
}

.case-number {
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: var(--project-color, var(--acid));
  color: var(--ink);
  font-weight: 700;
}

.case-title {
  max-width: 14ch;
  margin: 0 0 1.75rem;
  font-size: clamp(3.4rem, 10vw, 8rem);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 0.9;
}

.case-tagline {
  max-width: 46rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
  color: rgba(250, 249, 245, 0.72);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.6;
}

.case-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: clamp(3rem, 6vw, 4.5rem);
}

.case-actions .button {
  gap: 0.6rem;
}

.case-actions .button i {
  font-style: normal;
}

/* El botón principal toma el color del proyecto, no el acento global. */
.case-actions .button-primary {
  background: var(--project-color, var(--acid));
}

.button-ghost {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  padding: 1rem 1.6rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  transition: border-color 0.3s, background 0.3s;
}

.button-ghost:hover {
  border-color: rgba(250, 249, 245, 0.5);
  background: rgba(250, 249, 245, 0.06);
}

.case-facts {
  display: grid;
  width: 100%;
  margin: 0 0 2.5rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--line-dark);
  gap: 1.75rem clamp(1.5rem, 4vw, 4rem);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.case-fact dt {
  margin-bottom: 0.5rem;
  color: rgba(250, 249, 245, 0.45);
  font-family: Consolas, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.case-fact dd {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 650;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.case-tags span {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  color: rgba(250, 249, 245, 0.78);
  font-size: 0.62rem;
  font-weight: 700;
}

/* --------------------------------------------------------- Secciones */

.case-body {
  background: var(--paper);
}

/* Una sola columna del ancho del contenedor: los bloques con medida más
   angosta (listas, línea de tiempo) quedan alineados a la izquierda con
   el título en vez de centrarse por su cuenta. */
.case-section {
  display: grid;
  justify-content: center;
  grid-template-columns: minmax(0, var(--container));
  padding: clamp(4.5rem, 9vw, 8rem) var(--gutter);
}

/* El bloque ocupa el ancho del contenedor para quedar alineado con el
   resto de la sección; sólo el texto tiene medida limitada. */
.case-section-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.case-section-head > * {
  max-width: 46rem;
}

.case-section-head h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4.4vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.case-section-note {
  margin-top: 1.25rem;
  color: rgba(11, 12, 12, 0.58);
  font-size: 0.95rem;
  line-height: 1.7;
}

.case-section .section-kicker span {
  background: var(--project-color, var(--acid));
  color: var(--ink);
}

/* ---------------------------------------------------------- Pantallas */

.screen-gallery {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
  align-items: start;
}

.screen-card {
  display: flex;
  flex-direction: column;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
  box-shadow: 0 1.5rem 4rem rgba(11, 12, 12, 0.06);
}

.screen-card.screen-mobile {
  background: linear-gradient(160deg, var(--project-color, var(--violet)) 0%, var(--paper-soft) 62%);
}

.screen-shot {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--paper-soft);
  cursor: zoom-in;
}

.screen-card.screen-mobile .screen-shot {
  display: grid;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  place-items: center;
  background: transparent;
}

.screen-shot img {
  width: 100%;
  transition: transform 1s var(--ease-out);
}

.screen-card.screen-mobile .screen-shot img {
  width: auto;
  max-width: 100%;
  max-height: 20rem;
  border: 1px solid rgba(11, 12, 12, 0.5);
  border-radius: 1.35rem;
  box-shadow: 0 1.5rem 3rem rgba(11, 12, 12, 0.28);
}

/* La captura ya trae el chasis del teléfono: sin marco extra, y la
   sombra sigue la silueta en vez del rectángulo de la imagen. */
.screen-card.screen-framed .screen-shot img {
  border: 0;
  border-radius: 0;
  box-shadow: none;
  filter: drop-shadow(0 1.1rem 2.2rem rgba(11, 12, 12, 0.3));
}

/* Tira de celulares: un solo panel con el color del proyecto y las
   capturas en fila, sin una tarjeta por teléfono (el chasis ya enmarca).
   En el celular se vuelve un carrusel deslizable; ver el bloque de abajo. */
.screen-gallery.is-phones {
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
  border-radius: 1.25rem;
  background: linear-gradient(160deg, var(--project-color, var(--violet)) 0%, var(--paper-soft) 72%);
}

.screen-gallery.is-phones .screen-card {
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.screen-gallery.is-phones .screen-shot {
  display: block;
  padding: 0;
  overflow: visible;
  background: transparent;
}

.screen-gallery.is-phones .screen-shot img {
  width: 100%;
  max-height: none;
}

.screen-gallery.is-phones .screen-caption {
  gap: 0.35rem;
  padding: 1.1rem 0.2rem 0;
  border-top: 0;
}

.screen-gallery.is-phones .screen-caption p {
  font-size: 0.84rem;
  line-height: 1.55;
}

.screen-swipe-hint {
  display: none;
  gap: 0.5rem;
  align-items: center;
  margin-top: 1rem;
  color: rgba(11, 12, 12, 0.5);
  font-family: Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.screen-swipe-hint i {
  color: var(--project-ink, var(--violet));
  font-style: normal;
}

.screen-shot:hover img {
  transform: scale(1.02);
}

.screen-zoom {
  position: absolute;
  right: 0.85rem;
  bottom: 0.85rem;
  display: grid;
  width: 2.1rem;
  height: 2.1rem;
  place-items: center;
  border-radius: 50%;
  opacity: 0;
  background: var(--ink);
  color: var(--white);
  font-size: 0.8rem;
  transition: opacity 0.3s;
}

.screen-shot:hover .screen-zoom,
.screen-shot:focus-visible .screen-zoom {
  opacity: 1;
}

.screen-caption {
  display: grid;
  gap: 0.5rem;
  padding: 1.4rem 1.5rem 1.6rem;
  border-top: 1px solid var(--line);
}

.screen-caption strong {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.screen-caption p {
  color: rgba(11, 12, 12, 0.6);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ------------------------------------------------------------ Problema */

.case-split {
  display: grid;
  gap: clamp(2rem, 5vw, 4.5rem);
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
  align-items: start;
}

.case-prose {
  display: grid;
  gap: 1.5rem;
  max-width: 40rem;
}

.case-prose p {
  color: rgba(11, 12, 12, 0.66);
  font-size: 1rem;
  line-height: 1.8;
}

.case-lead {
  color: var(--ink) !important;
  font-size: clamp(1.15rem, 2vw, 1.5rem) !important;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.45 !important;
}

.case-checklist {
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
}

.case-checklist .card-label {
  color: rgba(11, 12, 12, 0.5);
}

.case-checklist ul {
  display: grid;
  gap: 1rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.case-checklist li {
  display: grid;
  gap: 0.75rem;
  align-items: start;
  grid-template-columns: auto 1fr;
  color: rgba(11, 12, 12, 0.72);
  font-size: 0.9rem;
  line-height: 1.6;
}

.case-checklist li i {
  color: var(--project-ink, var(--violet));
  font-style: normal;
  font-weight: 700;
}

/* -------------------------------------------------------------- Origen */

.case-timeline {
  display: grid;
  gap: 0;
  max-width: 52rem;
}

.timeline-step {
  display: grid;
  gap: 1.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: auto minmax(0, 1fr);
}

.timeline-step:last-child {
  border-bottom: 1px solid var(--line);
}

.timeline-marker {
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
}

.timeline-step p {
  color: rgba(11, 12, 12, 0.68);
  font-size: 1rem;
  line-height: 1.8;
}

/* ------------------------------------------------------------ Qué hace */

.feature-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 270px), 1fr));
}

.feature-card {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  padding: clamp(1.5rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
  transition: transform 0.5s var(--ease-out), border-color 0.35s;
}

.feature-card:hover {
  border-color: var(--project-ink, var(--violet));
  transform: translateY(-4px);
}

.feature-number {
  color: var(--project-ink, var(--violet));
  font-family: Consolas, monospace;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.feature-card p {
  color: rgba(11, 12, 12, 0.6);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------- Stack */

.case-section-dark {
  background: var(--ink);
  color: var(--white);
}

.case-section-dark .case-section-head h2 {
  color: var(--white);
}

.case-section-dark .case-section-note {
  color: rgba(250, 249, 245, 0.6);
}

.case-section-dark .section-kicker {
  color: rgba(250, 249, 245, 0.6);
}

.stack-groups {
  display: grid;
  gap: 0;
}

.stack-group {
  display: grid;
  gap: clamp(1.25rem, 4vw, 3.5rem);
  padding: clamp(2rem, 4vw, 2.75rem) 0;
  border-top: 1px solid var(--line-dark);
  grid-template-columns: minmax(160px, 0.4fr) minmax(0, 1.6fr);
}

.stack-group:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.stack-group-title {
  color: var(--project-color, var(--acid));
  font-family: Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.stack-items {
  display: grid;
  gap: 1.75rem;
}

.stack-item h4 {
  margin: 0 0 0.6rem;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stack-item p {
  max-width: 46rem;
  color: rgba(250, 249, 245, 0.62);
  font-size: 0.94rem;
  line-height: 1.75;
}

/* --------------------------------------------------------- Rendimiento */

.perf-lead {
  margin-top: 1.5rem;
  max-width: 46rem;
  color: rgba(11, 12, 12, 0.72) !important;
  font-size: clamp(1.02rem, 1.7vw, 1.22rem) !important;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.6 !important;
}

.perf-list {
  display: grid;
  gap: 0;
  max-width: 60rem;
}

.perf-item {
  display: grid;
  gap: 1.25rem;
  align-items: start;
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: auto minmax(0, 1fr);
}

.perf-item:last-child {
  border-bottom: 1px solid var(--line);
}

.perf-bullet {
  display: grid;
  width: 2.1rem;
  height: 2.1rem;
  place-items: center;
  border-radius: 50%;
  background: var(--project-color, var(--violet));
  color: var(--ink);
  font-size: 0.78rem;
  font-style: normal;
  font-weight: 700;
}

.perf-item h3 {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.perf-item p {
  max-width: 46rem;
  color: rgba(11, 12, 12, 0.62);
  font-size: 0.93rem;
  line-height: 1.72;
}

/* ----------------------------------------------------------- Impacto */

.impact-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
}

.impact-stat {
  display: grid;
  gap: 0.5rem;
  padding: clamp(1.5rem, 3vw, 2rem) 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
  text-align: center;
  transition: transform 0.5s var(--ease-out), border-color 0.35s;
}

.impact-stat:hover {
  border-color: var(--project-ink, var(--violet));
  transform: translateY(-4px);
}

.impact-stat strong {
  color: var(--project-ink, var(--violet));
  font-size: clamp(2.1rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}

.impact-stat span {
  color: rgba(11, 12, 12, 0.6);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ------------------------------------------------------------ Patrones */

.pattern-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

.pattern-card {
  display: grid;
  gap: 1rem;
  align-content: start;
  padding: clamp(1.6rem, 3vw, 2.15rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
  transition: border-color 0.35s, box-shadow 0.5s var(--ease-out);
}

.pattern-card:hover {
  border-color: var(--project-ink, var(--violet));
  box-shadow: 0 1.25rem 3rem rgba(11, 12, 12, 0.07);
}

.pattern-head {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: baseline;
}

.pattern-head h3 {
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.025em;
}

.pattern-head i {
  color: var(--project-ink, var(--violet));
  font-style: normal;
}

.pattern-where {
  padding: 0.5rem 0.7rem;
  border-radius: 0.5rem;
  background: var(--paper-soft);
  color: rgba(11, 12, 12, 0.6);
  font-family: Consolas, monospace;
  font-size: 0.68rem;
  line-height: 1.45;
  justify-self: start;
}

.pattern-card p {
  color: rgba(11, 12, 12, 0.62);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---------------------------------------------------------- Decisiones */

.decision-list {
  display: grid;
  gap: 1rem;
}

.decision-card {
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--white);
}

.decision-card h3 {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.15rem, 2.2vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.decision-rows {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
}

.decision-row {
  display: grid;
  gap: 0.7rem;
  align-content: start;
  padding-left: 1rem;
  border-left: 2px solid var(--line);
}

.decision-row.is-choice {
  border-left-color: var(--project-ink, var(--violet));
}

.decision-row.is-tradeoff {
  border-left-color: rgba(11, 12, 12, 0.28);
}

.decision-label {
  color: rgba(11, 12, 12, 0.42);
  font-family: Consolas, monospace;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.decision-row p {
  color: rgba(11, 12, 12, 0.68);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* -------------------------------------------------------- Aprendizajes */

.learned-list {
  display: grid;
  gap: 0;
  max-width: 52rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.learned-list li {
  display: grid;
  gap: 1.25rem;
  align-items: start;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
  grid-template-columns: auto minmax(0, 1fr);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  line-height: 1.6;
}

.learned-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.learned-list i {
  color: var(--project-ink, var(--violet));
  font-style: normal;
}

/* ------------------------------------------------- Siguiente proyecto */

.case-next {
  padding: clamp(4rem, 8vw, 7rem) 0;
  background: var(--ink);
  color: var(--white);
}

.case-next-inner {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  align-items: center;
}

.case-next-link {
  display: grid;
  gap: 0.5rem;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border: 1px solid var(--line-dark);
  border-radius: 1rem;
  transition: border-color 0.35s, background 0.35s, transform 0.5s var(--ease-out);
}

.case-next-link:hover {
  border-color: var(--project-color, var(--acid));
  background: rgba(250, 249, 245, 0.04);
  transform: translateY(-4px);
}

.case-next-label {
  color: rgba(250, 249, 245, 0.45);
  font-family: Consolas, monospace;
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.case-next-link strong {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.case-next-meta {
  color: rgba(250, 249, 245, 0.55);
  font-size: 0.82rem;
}

.case-next-link i {
  color: var(--project-color, var(--acid));
  font-size: 1.4rem;
  font-style: normal;
  justify-self: end;
}

.case-next-contact {
  display: grid;
  gap: 1rem;
  justify-items: start;
}

.case-next-contact p {
  color: rgba(250, 249, 245, 0.72);
  font-size: 1.05rem;
  line-height: 1.6;
}

.case-next-contact .line-link {
  color: var(--white);
}

/* --------------------------------------------------------- Índice fijo */

.case-nav {
  position: fixed;
  z-index: 30;
  top: 50%;
  left: clamp(1rem, 2vw, 2rem);
  display: none;
  flex-direction: column;
  gap: 0.55rem;
  max-width: 12rem;
  transform: translateY(-50%);
}

.case-nav a {
  padding-left: 0.9rem;
  border-left: 2px solid var(--line);
  color: rgba(11, 12, 12, 0.4);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.3;
  transition: color 0.25s, border-color 0.25s;
}

.case-nav a:hover,
.case-nav a.active {
  border-left-color: var(--project-ink, var(--violet));
  color: var(--ink);
}

@media (min-width: 1500px) {
  .case-nav {
    display: flex;
  }
}

/* ------------------------------------------------------------ Lightbox */

body.lightbox-open {
  overflow: hidden;
}

.lightbox {
  position: fixed;
  z-index: 1200;
  display: grid;
  padding: clamp(1.5rem, 5vw, 4rem);
  inset: 0;
  place-items: center;
  background: rgba(11, 12, 12, 0.92);
  backdrop-filter: blur(6px);
}

.lightbox[hidden] {
  display: none;
}

.lightbox-figure {
  display: grid;
  gap: 1.25rem;
  max-width: min(100%, 1200px);
  margin: 0;
}

.lightbox-image {
  max-height: 76vh;
  border: 1px solid var(--line-dark);
  border-radius: 0.75rem;
  object-fit: contain;
}

.lightbox-image.is-framed {
  border: 0;
  border-radius: 0;
}

.lightbox-caption {
  color: rgba(250, 249, 245, 0.72);
  font-size: 0.88rem;
  line-height: 1.6;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: clamp(1rem, 3vw, 2rem);
  right: clamp(1rem, 3vw, 2rem);
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  border-radius: 50%;
  background: rgba(250, 249, 245, 0.1);
  color: var(--white);
  cursor: pointer;
  transition: background 0.25s;
}

.lightbox-close:hover {
  background: rgba(250, 249, 245, 0.22);
}

/* --------------------------------------------------------- Responsive */

@media (max-width: 980px) {
  .case-split,
  .case-next-inner {
    grid-template-columns: 1fr;
  }

  .stack-group {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

/* Celular: mismo contenido con menos aire. Los rellenos y márgenes de
   escritorio sumaban casi una pantalla de vacío entre sección y sección. */
@media (max-width: 640px) {
  /* Portada */
  .case-hero {
    padding: 6.75rem 0 3rem;
  }

  .case-back {
    margin-bottom: 1.75rem;
  }

  .case-eyebrow {
    margin-bottom: 1.1rem;
  }

  .case-title {
    margin-bottom: 1rem;
  }

  .case-tagline {
    margin-bottom: 1.75rem;
  }

  .case-actions {
    gap: 0.6rem;
    margin-bottom: 2.25rem;
  }

  .case-actions .button,
  .case-actions .button-ghost {
    width: 100%;
    justify-content: space-between;
  }

  .case-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem 1rem;
    margin-bottom: 1.75rem;
    padding-top: 1.5rem;
  }

  .case-fact dt {
    margin-bottom: 0.3rem;
  }

  .case-fact dd {
    font-size: 0.88rem;
  }

  .case-tags {
    gap: 0.4rem;
  }

  .case-tags span {
    padding: 0.4rem 0.65rem;
    font-size: 0.6rem;
  }

  /* Secciones */
  .case-section {
    padding-block: 3.5rem;
  }

  .case-section-head {
    margin-bottom: 1.75rem;
  }

  .case-section .section-kicker {
    margin-bottom: 1.1rem;
  }

  .case-section-head h2 {
    font-size: clamp(1.9rem, 8.5vw, 2.4rem);
  }

  .case-section-note {
    margin-top: 0.8rem;
    font-size: 0.9rem;
  }

  /* Tira de celulares como carrusel: ocupa una fila en vez de apilar
     las capturas, y cada teléfono queda lo bastante grande para leerse. */
  .screen-gallery.is-phones {
    grid-template-columns: none;
    grid-auto-columns: 62%;
    grid-auto-flow: column;
    gap: 1rem;
    margin-inline: calc(var(--gutter) * -1);
    padding: 1.75rem var(--gutter) 1.5rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    border-radius: 0;
    scroll-padding-inline: var(--gutter);
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
  }

  .screen-gallery.is-phones::-webkit-scrollbar {
    display: none;
  }

  .screen-gallery.is-phones .screen-card {
    scroll-snap-align: start;
  }

  .screen-swipe-hint {
    display: flex;
  }

  /* Contexto y origen */
  .case-prose {
    gap: 1.1rem;
  }

  .case-prose p,
  .timeline-step p {
    font-size: 0.95rem;
    line-height: 1.72;
  }

  .case-checklist {
    padding: 1.25rem;
  }

  .timeline-step {
    gap: 1rem;
    padding: 1.4rem 0;
  }

  .timeline-marker {
    width: 2.1rem;
    height: 2.1rem;
    font-size: 0.6rem;
  }

  /* Tarjetas y listas */
  .feature-grid,
  .pattern-grid,
  .decision-list {
    gap: 0.6rem;
  }

  .feature-card {
    gap: 0.4rem;
    padding: 1.15rem 1.25rem;
  }

  .impact-grid {
    gap: 0.6rem;
    grid-template-columns: repeat(2, 1fr);
  }

  .impact-stat {
    padding: 1.15rem 0.75rem;
  }

  .stack-group {
    gap: 0.9rem;
    padding: 1.5rem 0;
  }

  .stack-items {
    gap: 1.25rem;
  }

  .stack-item p {
    font-size: 0.9rem;
  }

  .perf-item {
    gap: 0.9rem;
    padding: 1.25rem 0;
  }

  .perf-bullet {
    width: 1.8rem;
    height: 1.8rem;
  }

  .pattern-card {
    gap: 0.75rem;
    padding: 1.25rem;
  }

  .decision-card {
    padding: 1.25rem;
  }

  .decision-card h3 {
    margin-bottom: 1.1rem;
    padding-bottom: 0.9rem;
  }

  .decision-rows {
    gap: 1.1rem;
  }

  .learned-list li {
    gap: 0.9rem;
    padding: 1.1rem 0;
    font-size: 0.98rem;
  }

  /* Cierre */
  .case-next {
    padding: 3rem 0;
  }

  .case-next-inner {
    gap: 1.75rem;
  }

  .case-next-link {
    padding: 1.4rem;
  }
}