/* ===========================
   A4 Estudio — Single Proyecto
   =========================== */

/* ---- HERO ---- */
.proyecto-hero {
  position: relative;
  width: 100%;
  height: 85vh;
  height: 85dvh;
  min-height: 500px;
  overflow: hidden;
  padding: var(--header-height) var(--container-padding) 0;
}

.proyecto-hero__bg {
  position: absolute;
  inset: var(--header-height) var(--container-padding) 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-radius: var(--radius-lg);
}



.proyecto-hero__overlay {
  position: absolute;
  inset: var(--header-height) var(--container-padding) 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.1) 0%,
    rgba(0, 0, 0, 0.02) 40%,
    rgba(0, 0, 0, 0.55) 100%
  );
}

.proyecto-hero__content {
  position: absolute;
  bottom: 60px;
  left: calc(var(--container-padding) + var(--space-lg));
  right: calc(var(--container-padding) + var(--space-lg));
  z-index: 2;
  max-width: 700px;
}

.proyecto-hero__category {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-white);
  margin-bottom: 16px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.6s ease 0.3s forwards;
}

.proyecto-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: var(--weight-light);
  color: var(--color-white);
  line-height: 1.1;
  margin: 0;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease 0.5s forwards;
}

.proyecto-hero__number {
  opacity: 1;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll indicator */
.proyecto-hero__scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  opacity: 0;
  animation: fadeUp 0.6s ease 1.2s forwards;
}

.proyecto-hero__scroll span {
  display: block;
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.5);
  position: relative;
  overflow: hidden;
}

.proyecto-hero__scroll span::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-white);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0%   { top: -100%; }
  50%  { top: 100%; }
  100% { top: 100%; }
}

/* ---- SPECS BAR (horizontal) ---- */
.proyecto-specs {
  border-bottom: 1px solid var(--color-gray-200);
}

.proyecto-specs__bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  padding: var(--space-lg) var(--container-padding);
  max-width: 1400px;
  margin: 0 auto;
}

.proyecto-specs__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 0 var(--space-lg);
}

.proyecto-specs__label {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-black);
}

.proyecto-specs__value {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  color: var(--color-gray-700);
}

.proyecto-specs__divider {
  width: 1px;
  height: 32px;
  background: var(--color-gray-200);
  flex-shrink: 0;
}

/* ---- DESCRIPTION ---- */
.proyecto-description {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.proyecto-description__inner {
  max-width: 800px;
  margin: 0 auto;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-gray-700);
  text-align: center;
}

.proyecto-description__inner p {
  margin-bottom: var(--space-md);
}

.proyecto-description__inner p:last-child {
  margin-bottom: 0;
}

/* ---- GALLERY (Masonry) ---- */
.proyecto-gallery {
  padding: 0 var(--container-padding);
  margin: 0 auto var(--space-2xl);
}

.proyecto-gallery__masonry {
  columns: 4;
  column-gap: var(--space-sm);
}

.proyecto-gallery__item {
  margin: 0 0 var(--space-sm) 0;
  break-inside: avoid;
  overflow: hidden;
  border-radius: 15px;
  cursor: pointer;
}

.proyecto-gallery__item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

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

/* ---- NAVIGATION ---- */
.proyecto-nav {
  border-top: 1px solid var(--color-gray-200);
}

.proyecto-nav__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-lg);
  align-items: center;
  margin: 0 auto;
}

.proyecto-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: inherit;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.proyecto-nav__link:hover {
  background: var(--color-gray-100);
  opacity: 1;
}

.proyecto-nav__link img {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.proyecto-nav__link--next {
  flex-direction: row-reverse;
  text-align: right;
}

.proyecto-nav__info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.proyecto-nav__label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-black);
}

.proyecto-nav__link--next .proyecto-nav__label {
  justify-content: flex-end;
}

.proyecto-nav__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-light);
  color: var(--color-gray-700);
}

.proyecto-nav__all {
  text-align: center;
}

.proyecto-nav__all .btn {
  line-height: normal;
}

.proyecto-nav__prev {
  justify-self: start;
}

.proyecto-nav__next {
  justify-self: end;
}

/* ---- CTA ---- */
.proyecto-cta {
  text-align: center;
}

.proyecto-cta__inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.proyecto-cta__text {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-light);
  line-height: 1.3;
  margin: 0;
}

/* ---- LIGHTBOX ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox[hidden] {
  display: flex;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox__close {
  position: absolute;
  top: 20px;
  right: 20px;
  color: var(--color-white);
  padding: 12px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.lightbox__close:hover {
  opacity: 1;
}

.lightbox__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-white);
  padding: 16px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.lightbox__arrow:hover {
  opacity: 1;
}

.lightbox__arrow--prev {
  left: 16px;
}

.lightbox__arrow--next {
  right: 16px;
}

.lightbox__figure {
  max-width: 90vw;
  max-height: 90vh;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 2px;
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.lightbox.active .lightbox__img {
  opacity: 1;
  transform: scale(1);
}

.lightbox__counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 2px;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .proyecto-specs__item {
    padding: 0 var(--space-md);
  }

  .proyecto-nav__link img {
    width: 64px;
    height: 48px;
  }

  .proyecto-gallery__masonry {
    columns: 3;
  }
}

@media (max-width: 768px) {
  .proyecto-hero {
    height: 70vh;
    height: 70dvh;
    min-height: 400px;
  }

  .proyecto-hero__content {
    bottom: 40px;
    left: calc(var(--container-padding) + var(--space-md));
    right: calc(var(--container-padding) + var(--space-md));
  }

  .proyecto-hero__scroll {
    display: none;
  }

  .proyecto-specs__bar {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md) var(--container-padding);
  }

  .proyecto-specs__divider {
    width: 40px;
    height: 1px;
  }

  .proyecto-specs__item {
    padding: 0;
  }

  .proyecto-description {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }

  .proyecto-description__inner {
    text-align: left;
  }

  .proyecto-description {
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
  }

  .proyecto-gallery {
    padding: 0 var(--space-sm);
    margin-bottom: var(--space-xl);
  }

  .proyecto-gallery__masonry {
    columns: 2;
    column-gap: var(--space-sm);
  }

  .proyecto-nav__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    text-align: center;
  }

  .proyecto-nav__prev,
  .proyecto-nav__next {
    justify-self: center;
  }

  .proyecto-nav__link,
  .proyecto-nav__link--next {
    justify-content: center;
  }

  .proyecto-nav__link--next {
    flex-direction: row;
  }

  .proyecto-nav__link--next .proyecto-nav__label {
    justify-content: flex-start;
  }

  .proyecto-nav__link--next .proyecto-nav__info {
    text-align: left;
  }

  .lightbox__arrow--prev { left: 8px; }
  .lightbox__arrow--next { right: 8px; }
}

@media (max-width: 480px) {
  .proyecto-hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .proyecto-nav__link img {
    display: none;
  }
}