/* ============================================================
   PROYECTO_DETALLE.CSS — Página de detalle de un proyecto
   ============================================================ */

/* ---- Hero 100vh ---- */
.detalle-hero {
  position: relative;
  height: calc(100vh - var(--header-height));
  overflow: hidden;
}

.detalle-hero-img {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.detalle-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Overlay con degradado oscuro en la parte inferior */
.detalle-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 45%, rgba(0,0,0,0.55) 100%);
  display: flex;
  align-items: flex-end;
}

.detalle-hero-info {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  padding: 0 40px 52px;
}

.detalle-back {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.detalle-back a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

.detalle-back a:hover {
  color: #fff;
}

.detalle-hero-info h1 {
  font-size: clamp(28px, 5vw, 64px);
  font-weight: 200;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.15;
  color: #fff;
}

/* ---- Cuerpo: Aside + Descripción side-by-side ---- */
.detalle-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 40px;
  gap: 80px;
  align-items: start;
}

/* ---- Aside ficha técnica ---- */
.detalle-aside {
  position: sticky;
  top: calc(var(--header-height) + 32px);
}

.proyecto-meta {
  display: block;
  margin: 0;
  padding: 0;
}

.proyecto-meta dt {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: 28px;
  margin-bottom: 4px;
}

.proyecto-meta dt:first-child {
  margin-top: 0;
}

.proyecto-meta dd {
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--color-text);
  line-height: 1.6;
  margin: 0;
}

/* ---- Descripción ---- */
.detalle-descripcion {
  padding-top: 4px;
}

.detalle-descripcion p {
  font-size: 15px;
  font-weight: 300;
  line-height: 2;
  color: var(--color-muted);
  white-space: pre-line;
}

/* ---- Galería ---- */
.detalle-galeria {
  padding: 60px 40px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}

.galeria-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* Primer elemento ocupa dos columnas — efecto editorial */
.galeria-grid .galeria-item:first-child {
  grid-column: span 2;
}

.galeria-item {
  overflow: hidden;
  position: relative;
}

/* Botón invisible que envuelve la imagen */
.galeria-btn-open {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: zoom-in;
  overflow: hidden;
  position: relative;
}

.galeria-btn-open::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  transition: background 0.3s ease;
}

.galeria-btn-open:hover::after {
  background: rgba(0,0,0,0.12);
}

.galeria-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: block;
}

.galeria-btn-open:hover img {
  transform: scale(1.04);
}

.galeria-item:first-child .galeria-btn-open img {
  aspect-ratio: 16/9;
}

.galeria-item figcaption {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  margin-top: 8px;
  text-transform: uppercase;
}

/* ---- Lightbox ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.93);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: lb-fade-in 0.22s ease;
}

.lightbox[hidden] {
  display: none;
}

@keyframes lb-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lightbox-img-wrap {
  max-width: min(1200px, 90vw);
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  box-shadow: 0 8px 60px rgba(0,0,0,0.5);
  animation: lb-img-in 0.25s ease;
}

@keyframes lb-img-in {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}

.lightbox-close {
  position: fixed;
  top: 20px;
  right: 28px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.75);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  padding: 8px;
  transition: color 0.2s;
  z-index: 10000;
}

.lightbox-close:hover { color: #fff; }

.lightbox-prev,
.lightbox-next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: rgba(255,255,255,0.65);
  cursor: pointer;
  padding: 16px 12px;
  transition: color 0.2s;
  z-index: 10000;
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

.lightbox-prev:hover,
.lightbox-next:hover { color: #fff; }

.lightbox-prev:disabled,
.lightbox-next:disabled {
  opacity: 0.2;
  cursor: default;
}

.lightbox-counter {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.55);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ---- Navegación inferior ---- */
.detalle-nav {
  padding: 40px 40px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--color-border);
}

.btn-volver {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.btn-volver:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .detalle-body {
    grid-template-columns: 240px 1fr;
    gap: 48px;
    padding: 60px 32px;
  }
  .galeria-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .galeria-grid .galeria-item:first-child {
    grid-column: span 2;
  }
  .detalle-galeria,
  .detalle-nav {
    padding-left: 32px;
    padding-right: 32px;
  }
}

@media (max-width: 768px) {
  .detalle-hero {
    height: 70vh;
  }
  .detalle-body {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 20px;
  }
  .detalle-aside {
    position: static;
  }
  .detalle-galeria,
  .detalle-nav {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (max-width: 640px) {
  .detalle-hero {
    height: 60vh;
  }
  .detalle-hero-info {
    padding: 0 20px 36px;
  }
  .detalle-galeria {
    padding-top: 40px;
    padding-bottom: 60px;
  }
  .galeria-grid {
    grid-template-columns: 1fr;
  }
  .galeria-grid .galeria-item:first-child {
    grid-column: span 1;
  }
  .detalle-nav {
    padding-bottom: 60px;
  }
}