/* =====================================================
   PROJECT DETAIL — Layout
   Used by all /project-name/index.html pages
   ===================================================== */

/* ── Header ── */
.project-header {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.project-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  transition: color var(--transition);
  text-decoration: none;
}
.project-back:hover { color: var(--color-text-heading); }

.project-title {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: var(--fw-extrabold);
  color: var(--color-text-heading);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}


/* ── Meta cards ── */
.project-meta {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.project-meta__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-meta__label {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-normal);
  color: var(--color-text-muted);
}

.project-meta__value {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-heading);
  line-height: var(--leading-snug);
}

/* ── Section ── */
.project-section {
  padding-block: 0;
}

/* Spacing between sections — keeps first section flush with header */
.project-section + .project-section {
  margin-top: 88px;
}

.project-section .section__label {
  margin-bottom: var(--space-4);
}

/* 2-col body: image left / text right — 12-col grid, default 6+6 */
.project-section__body {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-5);
  align-items: start;
}
.project-section__media { grid-column: span 6; }
.project-section__text  { grid-column: span 6; }

/* Swap: text left / image right */
.project-section__body--reverse .project-section__media {
  order: 2;
}
.project-section__body--reverse .project-section__text {
  order: 1;
}

/* Images column — stacks multiple images */
.project-section__media {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.project-section__media img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  display: block;
}

/* Text column */
.project-section__text h2 {
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  color: var(--color-text-heading);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-3);
}

.project-section__text p {
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-3);
}
.project-section__text p:last-child { margin-bottom: 0; }

.project-section__text h2 + h2 { margin-top: var(--space-4); }

/* Cover + 2-col variant (e.g. Overview section) */
.project-section__cover {
  margin-bottom: var(--space-10);
}
.project-section__cover img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  display: block;
  aspect-ratio: 21/9;
}
.project-section__cols {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-5);
  align-items: start;
}
.project-section__cols > * { grid-column: span 6; }

/* ── Info cards (optional, inside section) ── */
.project-section__cards {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

.project-section__card {
  flex: 1 1 0;
  min-width: 140px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-3);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-section__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* Stacked cards (vertical, inside text col) */
.project-section__cards--stacked {
  flex-direction: column;
  margin-top: var(--space-3);
}

.project-section__card-heading {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--fw-bold);
  color: var(--color-text-heading);
  margin-bottom: 8px;
}

.project-section__card p {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* Left border accent variants */
.project-section__card--problem {
  border-left: 3px solid var(--color-text-muted);
}
.project-section__card--goal {
  border-left: 3px solid var(--color-accent-2);
}
.project-section__card--scope {
  border-left: 3px solid var(--color-accent-1);
}

.project-section__card-label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.project-section__card-value {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-heading);
  line-height: var(--leading-snug);
}


/* Problem analysis image stack — responsive C gap */
.problem-images {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Full-width image (Problem analysis, Design solution) */
.project-section__full-img {
  width: 100%;
  border-radius: var(--radius-lg);
  display: block;
  object-fit: cover;
}

/* Design solution block: h2 + p + image stacked */
.project-section__block {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.project-section__block + .project-section__block {
  margin-top: var(--space-5);
}
.project-section__block .img-wrap + .img-wrap {
  margin-top: var(--space-4);
}

/* Standalone paragraph (What's next, Graphics description) */
.project-section__standalone-p {
  font-size: var(--text-sm);
  color: var(--color-text-body);
  line-height: var(--leading-relaxed);
  max-width: calc(5 * (var(--container-max) - 2 * var(--container-padding) - 11 * var(--space-3)) / 12 + 4 * var(--space-3));
  margin-bottom: var(--space-4);
}
.project-section__standalone-p:last-child { margin-bottom: 0; }

/* ── Bottom: Behance + prev/next ── */
.project-bottom {
  padding-top: var(--space-8);
  padding-bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
}

.project-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.project-nav__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-decoration: none;
  transition: opacity var(--transition);
}
.project-nav__item:hover { opacity: 0.7; }

.project-nav__item--next { text-align: right; }

.project-nav__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.project-nav__title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-heading);
}

/* ── Image skeleton loading ── */
@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.img-wrap {
  display: block;
  width: 100%;
  min-height: 200px;
  overflow: hidden;
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border)    50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite linear;
}
.img-wrap.loaded {
  animation: none;
  background: none;
  min-height: 0;
}
.img-wrap img {
  opacity: 0;
  transition: opacity 0.4s ease;
  display: block;
  width: 100%;
  height: auto;
}
.img-wrap.loaded img {
  opacity: 1;
}
@media (prefers-reduced-motion: reduce) {
  .img-wrap { animation: none; }
  .img-wrap img { transition: none; }
}

/* ── Scroll fade-up (reuse homepage pattern) ── */
.project-section.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.project-section.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .project-title { font-size: var(--text-3xl); }

  .project-section__body,
  .project-section__body--reverse {
    grid-template-columns: 1fr;
  }

  /* Cols grid → single column so children stack full-width */
  .project-section__cols {
    grid-template-columns: 1fr;
  }

  .project-section__media,
  .project-section__text,
  .project-section__cols > * {
    grid-column: span 1;
  }

  .project-section__body--reverse .project-section__media,
  .project-section__body--reverse .project-section__text {
    order: unset;
  }

  /* Meta: 2-col grid so items align evenly */
  .project-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  /* Tighter header spacing on mobile */
  .project-meta__item { gap: 0; }
  .project-header { padding-top: var(--space-4); padding-bottom: var(--space-4); }
  .project-back { margin-bottom: var(--space-3); }
  .project-meta { margin-top: var(--space-3); }

  /* Tighter section spacing on mobile */
  .project-section + .project-section { margin-top: var(--space-7); }
  .project-section .section__label { margin-bottom: var(--space-3); }
  .project-section__cards { margin-top: var(--space-2); gap: var(--space-3); }
  .project-section__cover { margin-bottom: var(--space-4); }
  .project-section__block + .project-section__block { margin-top: var(--space-4); }
  .project-section__block .img-wrap + .img-wrap { margin-top: var(--space-3); }
  .project-section__text h2 { margin-bottom: var(--space-2); }
  .project-section__cards--stacked { margin-top: var(--space-2); }
  .problem-images { gap: var(--space-3); }
  .project-section__standalone-p { margin-bottom: var(--space-3); }

  /* Reset inline grid-column overrides (Challenge, What's next) */
  .project-section .grid > div { grid-column: 1 / -1 !important; }

  /* Behance button full-width */
  .project-bottom .btn { width: 100% !important; }

  /* Remove card hover on touch */
  .project-section__card:hover { transform: none; box-shadow: var(--shadow-card); }

  .project-nav { flex-direction: column; gap: var(--space-4); align-items: flex-start; }
  .project-nav__item--next { text-align: left; }
}