/* ============================================================
   ChichaLabs Studio — Case Study Pages
   Estilos para páginas individuales de casos de estudio
   ============================================================ */

/* Variables de tema por proyecto (sobreescritas en JS al montar) */
:root {
  --cs-accent:      #2CE58B;   /* alineado al design system dark premium */
  --cs-accent-dark: #1FA968;
  --cs-bg-dark:     #08090B;   /* pozo profundo para hero / cta full-bleed */
  --cs-text-dark:   #F5F6F7;
}

/* ============================================================
   RESET CASE STUDY BODY
   ============================================================ */
.cs-body {
  background: var(--bg);
  overflow-x: hidden;
}

/* ============================================================
   NAV CASE STUDY — minimal back nav
   ============================================================ */
.cs-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 2rem;
  background: rgba(10,10,11,0.62);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(245,246,247,0.08);
  transition: border-color 0.2s;
}

.cs-nav--scrolled { border-bottom-color: var(--cs-accent); }

.cs-nav__back {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(245,246,247,0.45);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}

.cs-nav__back:hover { color: var(--cs-accent); }

.cs-nav__back svg { width: 16px; height: 16px; }

.cs-nav__brand {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--cs-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.cs-nav__cta {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  border: 1.5px solid var(--cs-accent);
  padding: 0.5rem 1.25rem;
  border-radius: 3px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.cs-nav__cta:hover { background: var(--cs-accent); color: var(--ink-on-accent); }

@media (min-width: 900px) { .cs-nav { padding: 1.25rem 3rem; } }

/* ============================================================
   HERO
   ============================================================ */
.cs-hero {
  min-height: 100svh;
  background: var(--cs-bg-dark);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 8rem 0 5rem;
  overflow: hidden;
}

/* Pattern de fondo por tipo de proyecto */
.cs-hero__pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* Architecture pattern: grid fino */
[data-theme="architecture"] .cs-hero__pattern {
  background-image:
    linear-gradient(rgba(196,168,130,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(196,168,130,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Agritech: grid de campo */
[data-theme="agritech"] .cs-hero__pattern {
  background-image:
    radial-gradient(circle, rgba(64,192,116,0.12) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Food brand: líneas orgánicas */
[data-theme="food-brand"] .cs-hero__pattern {
  background: repeating-linear-gradient(
    -55deg,
    transparent,
    transparent 20px,
    rgba(196,69,48,0.05) 20px,
    rgba(196,69,48,0.05) 21px
  );
}

/* B2B / corporate: diagonal */
[data-theme="b2b"] .cs-hero__pattern {
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 30px,
    rgba(10,122,255,0.05) 30px,
    rgba(10,122,255,0.05) 31px
  );
}

/* Brand / snack: random dots */
[data-theme="brand"] .cs-hero__pattern {
  background-image: radial-gradient(circle, rgba(230,48,48,0.15) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Coffee: radial warm gradient */
[data-theme="coffee"] .cs-hero__pattern {
  background: radial-gradient(ellipse 60% 60% at 80% 30%, rgba(200,134,58,0.12) 0%, transparent 70%);
}

/* Health: horizontal lines + clean */
[data-theme="health"] .cs-hero__pattern {
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 40px,
    rgba(76,175,80,0.06) 40px,
    rgba(76,175,80,0.06) 41px
  );
}

/* Automotive: angular lines */
[data-theme="automotive"] .cs-hero__pattern {
  background: repeating-linear-gradient(
    -65deg,
    transparent,
    transparent 50px,
    rgba(184,150,94,0.07) 50px,
    rgba(184,150,94,0.07) 51px
  );
}

/* Cultural: scattered elements */
[data-theme="cultural"] .cs-hero__pattern {
  background-image:
    radial-gradient(circle, rgba(255,107,53,0.12) 1.5px, transparent 1.5px),
    radial-gradient(circle, rgba(255,107,53,0.05) 3px, transparent 3px);
  background-size: 48px 48px, 96px 96px;
  background-position: 0 0, 24px 24px;
}

/* Portfolio: monochrome grid */
[data-theme="portfolio"] .cs-hero__pattern {
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
}

/* Imagen hero (overlay) */
.cs-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.6s;
}

.cs-hero__img.is-loaded { opacity: 0.35; }

.cs-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--cs-bg-dark) 30%, transparent 100%);
  z-index: 2;
}

.cs-hero__content {
  position: relative;
  z-index: 3;
}

.cs-hero__eyebrow {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--cs-accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cs-hero__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--cs-accent);
  flex-shrink: 0;
}

.cs-hero__client {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 10rem);
  color: var(--cs-text-dark, #F0F0F0);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 0.95;
  margin-bottom: 1.75rem;
}

.cs-hero__title {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 400;
  color: rgba(240,240,240,0.55);
  max-width: 52ch;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  text-transform: none;
  letter-spacing: 0;
}

.cs-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.cs-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cs-hero__tag {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cs-accent);
  border: 1px solid var(--cs-accent);
  padding: 0.25rem 0.65rem;
  border-radius: 2px;
  opacity: 0.8;
}

.cs-hero__url {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(240,240,240,0.35);
  transition: color 0.2s;
  margin-left: auto;
}

.cs-hero__url:hover { color: var(--cs-accent); }

/* ============================================================
   SECCIONES INTERNAS
   ============================================================ */
.cs-section {
  padding: 7rem 0;
  border-bottom: 1px solid rgba(245,246,247,0.08);
}

.cs-section:last-of-type { border-bottom: none; }

.cs-section--tinted { background: var(--bg-2); }

.cs-section__label {
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--cs-accent);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.cs-section__label::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--cs-accent);
  flex-shrink: 0;
}

/* ============================================================
   OVERVIEW — split layout
   ============================================================ */
.cs-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 860px) {
  .cs-overview {
    grid-template-columns: 1.5fr 1fr;
    gap: 6rem;
    align-items: start;
  }
}

.cs-overview__text {
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.75;
  color: rgba(245,246,247,0.75);
  max-width: 60ch;
}

.cs-overview__text strong { color: var(--ink); font-weight: 700; }

.cs-overview__meta {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid rgba(245,246,247,0.1);
}

.cs-meta-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(245,246,247,0.08);
}

.cs-meta-item__label {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(245,246,247,0.35);
}

.cs-meta-item__value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
}

.cs-meta-item__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.25rem;
}

.cs-meta-item__tool {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(245,246,247,0.5);
  border: 1px solid rgba(245,246,247,0.12);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
}

/* ============================================================
   PROBLEM / CONSTRAINTS — dark card
   ============================================================ */
.cs-problem {
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  position: relative;
  overflow: hidden;
}

.cs-problem::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--cs-accent);
}

@media (min-width: 860px) {
  .cs-problem { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

.cs-problem__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  color: #F0F0F0;
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.cs-problem__text {
  font-size: 0.95rem;
  color: rgba(240,240,240,0.6);
  line-height: 1.75;
  max-width: 50ch;
}

.cs-problem__text strong { color: rgba(240,240,240,0.9); }

/* ============================================================
   SOLUTION ITEMS
   ============================================================ */
.cs-solution {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) { .cs-solution { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cs-solution { grid-template-columns: repeat(2, 1fr); } }

.cs-solution__intro {
  grid-column: 1 / -1;
  font-size: 1rem;
  color: rgba(245,246,247,0.55);
  margin-bottom: 0.5rem;
  font-style: italic;
}

.cs-solution-item {
  border: 1px solid rgba(245,246,247,0.1);
  border-radius: 4px;
  padding: 1.75rem;
  border-top: 2px solid var(--cs-accent);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.cs-solution-item:hover {
  border-color: var(--cs-accent);
  box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.cs-solution-item__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 0.75rem;
  color: var(--ink);
}

.cs-solution-item__desc {
  font-size: 0.9rem;
  color: rgba(245,246,247,0.6);
  line-height: 1.65;
}

/* ============================================================
   PROCESS STEPS
   ============================================================ */
.cs-process {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid rgba(245,246,247,0.1);
}

.cs-process-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(245,246,247,0.08);
  align-items: start;
}

.cs-process-step__num {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  color: var(--cs-accent);
  line-height: 1;
  opacity: 0.4;
  min-width: 3ch;
  transition: opacity 0.2s;
}

.cs-process-step:hover .cs-process-step__num { opacity: 1; }

.cs-process-step__content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.6rem);
  text-transform: uppercase;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.cs-process-step__content p {
  font-size: 0.9rem;
  color: rgba(245,246,247,0.6);
  line-height: 1.7;
  max-width: 58ch;
}

/* ============================================================
   GALLERY DE IMÁGENES
   ============================================================ */
.cs-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .cs-gallery { grid-template-columns: repeat(2, 1fr); }
  .cs-gallery__item:first-child { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .cs-gallery { grid-template-columns: repeat(3, 1fr); }
  .cs-gallery__item:first-child { grid-column: 1 / 3; }
}

.cs-gallery__item {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 4px;
  background: rgba(245,246,247,0.06);
  position: relative;
}

.cs-gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s;
}

.cs-gallery__item:hover img { transform: scale(1.03); }

.cs-gallery__item { cursor: zoom-in; }
.cs-gallery__item:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }

/* Placeholder si no hay imagen */
.cs-gallery__placeholder {
  width: 100%;
  height: 100%;
  background: var(--cs-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3rem;
  color: rgba(255,255,255,0.06);
  position: relative;
}

.cs-gallery__placeholder::after {
  content: attr(data-label);
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.18);
}

/* ============================================================
   RESULTS
   ============================================================ */
.cs-results {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) { .cs-results { grid-template-columns: repeat(2, 1fr); } }

.cs-result-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.5rem;
  background: var(--surface-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--cs-accent);
}

.cs-result-item__icon {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--cs-accent);
  line-height: 1;
  flex-shrink: 0;
}

.cs-result-item__text {
  font-size: 0.9rem;
  color: rgba(245,246,247,0.7);
  line-height: 1.6;
}

/* ============================================================
   CONCLUSION
   ============================================================ */
.cs-conclusion {
  max-width: 72ch;
}

.cs-conclusion__text {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: rgba(245,246,247,0.65);
  line-height: 1.8;
  font-style: italic;
}

/* ============================================================
   CTA BOTTOM
   ============================================================ */
.cs-cta {
  background: var(--cs-bg-dark);
  padding: 7rem 0;
  position: relative;
  overflow: hidden;
}

.cs-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.cs-cta__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  color: rgba(240,240,240,0.9);
  text-transform: uppercase;
  line-height: 1.05;
}

.cs-cta__sub {
  font-size: 1rem;
  color: rgba(240,240,240,0.45);
  max-width: 48ch;
  line-height: 1.7;
}

.cs-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
}

/* El botón primario ya es un fill verde con glow (design system).
   En el CTA oscuro sólo ajustamos el botón de texto. */
.cs-cta .btn--text { color: var(--ink-2); }
.cs-cta .btn--text:hover { color: var(--cs-accent); }

/* Navigation entre casos al fondo */
.cs-case-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(245,246,247,0.08);
  border-top: 1px solid rgba(245,246,247,0.08);
}

.cs-case-nav__item {
  padding: 2.5rem 2rem;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: background 0.2s;
}

.cs-case-nav__item:hover { background: var(--surface-2); }

.cs-case-nav__item--next { text-align: right; }

.cs-case-nav__dir {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(245,246,247,0.3);
}

.cs-case-nav__name {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 2rem);
  text-transform: uppercase;
  line-height: 1.05;
  color: var(--ink);
}

/* ============================================================
   LOADER SKELETON
   ============================================================ */
.cs-skeleton {
  background: linear-gradient(90deg,
    rgba(245,246,247,0.06) 25%,
    rgba(245,246,247,0.10) 37%,
    rgba(245,246,247,0.06) 63%
  );
  background-size: 400px 100%;
  animation: cs-shimmer 1.4s ease infinite;
  border-radius: 4px;
}

@keyframes cs-shimmer {
  from { background-position: -400px 0; }
  to   { background-position: 400px 0; }
}

/* ============================================================
   ERROR STATE
   ============================================================ */
.cs-error {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.5rem;
  padding: 2rem;
}

.cs-error__code {
  font-family: var(--font-display);
  font-size: 8rem;
  color: rgba(245,246,247,0.08);
  line-height: 1;
}

.cs-error__title {
  font-family: var(--font-display);
  font-size: 2rem;
  text-transform: uppercase;
}

/* ============================================================
   LIGHTBOX — vista completa de imagen de galería
   ============================================================ */
.cs-lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
  background: rgba(8,8,8,0.94);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.cs-lightbox.is-open { opacity: 1; visibility: visible; }

.cs-lightbox__img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
  transform: scale(0.97);
  transition: transform 0.25s;
}

.cs-lightbox.is-open .cs-lightbox__img { transform: scale(1); }

.cs-lightbox__close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  color: #fff;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.cs-lightbox__close:hover { border-color: var(--cs-accent, var(--green)); background: rgba(255,255,255,0.06); }
.cs-lightbox__close svg { width: 18px; height: 18px; }

@media (prefers-reduced-motion: reduce) {
  .cs-lightbox, .cs-lightbox__img { transition: none; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (min-width: 900px) {
  .cs-section { padding: 9rem 0; }
}

@media (max-width: 480px) {
  .cs-hero { padding: 7rem 0 4rem; }
  .cs-hero__client { font-size: clamp(3rem, 15vw, 6rem); }
  .cs-problem { padding: 2rem; }
}

/* ============================================================
   PREFERS-REDUCED-MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .cs-hero__img { transition: none; }
  .cs-gallery__item img { transition: none; }
  .cs-skeleton { animation: none; background: rgba(245,246,247,0.06); }
}