/* ============================================================
   PROJECT PAGE SYSTEM
   Optimized for 960px Max-Width Fluid Container
   ============================================================ */

/* 1. LAYOUT CONTAINERS */

.project-hero {
  max-width: var(--content-max-width);
  margin-inline: auto;
  width: 100%;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-lg);
  overflow: hidden;
}

.project-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

.project-body-wrapper {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: min-content;
  column-gap: var(--space-lg);
  row-gap: 0;
  max-width: var(--content-max-width);
  margin-inline: auto;
  position: relative;
  align-items: start;
}

/* 2. NARRATIVE CONTENT (LEFT 8 COLUMNS) */

.quickLabel {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-midGrey);
  margin-bottom: var(--space-sm);
}

.story-content {
  grid-column: 1 / 9;
  margin-bottom: 0;
  padding-bottom: 0;
}

.story-content h1 {
  font-weight: 500;
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-lg);
  margin-top: 0;
  padding-top: 0;
}

.story-content h2 {
  font-weight: 500;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: 0;
  margin-bottom: var(--space-md);
}

.story-content section {
  margin-top: var(--section-gap);
  padding-bottom: 0;
}

.story-content section:first-of-type {
  margin-top: 0;
}

.story-content p {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 65ch;
  margin-bottom: var(--space-md);
  color: var(--color-dark);
}

/* 3. STICKY NAV RAIL (RIGHT 3 COLUMNS) */

.project-nav-rail {
  grid-column: 10 / 13;
  /* Tell it to span from row 1 to row 3 (Intro, Full-Bleed, Outcomes) */
  grid-row: 1 / span 3;

  position: sticky;
  top: var(--nav-height);
  height: fit-content;

  display: flex;
  flex-direction: column;
  gap: 1.25rem;

  border-left: 1.5px solid var(--color-lightGrey);
  padding-left: 1.5rem;
  z-index: 5;

  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.rail-item {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-midGrey);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1.65rem;
  padding-left: 1.5rem;
  transition: all 0.3s ease;
}

.rail-item:hover,
.rail-item.active {
  color: var(--color-dark);
}

.rail-item.active {
  border-left-color: var(--color-dark);
}

.rail-hidden {
  opacity: 0;
  transform: translateX(15px);
  pointer-events: none;
}

section[id],
.full-bleed-dark[id] {
  scroll-margin-top: var(--nav-height); /* Matches your rail's 'top' value */
}

/* Ensure smooth sliding instead of an instant jump */
html {
  scroll-behavior: smooth;
}

/* 4. MEDIA ASSETS */

/* The Vertical Stack (for middle sections) */
.vertical-stack-item {
  margin-bottom: var(--space-md);
}

.vertical-stack-item .img-full {
  margin-bottom: var(--space-sm);
}

.vertical-stack:last-of-type {
  margin-bottom: var(--space-md);
}

/* Side-by-Side (for top/bottom comparisons) */
.asset-flex-group {
  display: flex;
  gap: var(--space-md);
  margin-block: var(--space-lg);
}

.asset-flex-group > div {
  flex: 1;
}

/* Shared Image Handling */
.img-full,
.asset-flex-group img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin-bottom: 0;
}

.img-full {
  margin-bottom: var(--space-sm);
}

.asset-flex-group img {
  border: 1px solid var(--color-lightGrey);
  margin-bottom: var(--space-sm);
}

.caption {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-midGrey);
  display: block;
  margin-top: var(--space-sm);
  margin-bottom: var(--space-lg);
  line-height: 1;
}

/* The wrapper acts as a single block in the section's flow */
.asset-group-wrapper {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.asset-group-wrapper .asset-flex-group {
  margin-bottom: var(--space-sm);
}

.asset-group-wrapper .caption {
  display: block;
  margin-top: 0;
  text-align: left;
}

.padding-help-white {
  padding: 1rem;
  background-color: white;
}

/* 5. FULL BLEED BREAKS */

.full-bleed-dark {
  grid-column: 1 / -1;
  width: auto;
  margin-inline: calc(50% - 50vw);
  background-color: var(--color-dark);
  padding-block: var(--space-2xl);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
}

.full-bleed-dark .media-container {
  width: 100%;
  max-width: var(--content-max-width);
  padding-inline: var(--mobile-gutter);
}

.full-bleed-dark img {
  width: 100%;
  height: auto;
  display: block;
}

.tab-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-md);
  gap: var(--space-md);
}

.tab-list {
  display: flex;
  flex-direction: row;
  gap: var(--space-md);
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-list::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  width: auto;
  flex-shrink: 0;
  background: transparent;
  border: none;
  padding: 0.5rem 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-midGrey);
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}

.tab-btn.active {
  color: var(--color-white);
  border-bottom: 1px solid var(--color-white);
}

.tab-btn:hover {
  color: var(--color-white);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  width: 100%;
  max-width: 900px;
  margin-bottom: var(--space-md);
}

.comparison-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.comparison-item img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  margin-bottom: var(--space-sm);
  padding: 1rem;
  background-color: white;
}

.label-mono {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-midGrey);
}

#before-image,
#after-image {
  transition: opacity 0.3s ease;
  will-change: opacity;
}

/* 6. RESPONSIVE ADJUSTMENTS */

/* === 900px: Major layout shift - single column === */
@media (max-width: 900px) {
  /* Hide rail navigation */
  .project-nav-rail {
    display: none;
  }

  /* Expand story content to full width */
  .story-content {
    grid-column: 1 / 13;
  }

  /* Add bottom padding */
  .project-body-wrapper {
    padding-bottom: var(--space-lg);
  }

  /* Stack asset flex groups */
  .asset-flex-group {
    flex-direction: column;
    gap: var(--space-lg);
  }

  /* Mobile Before/After Toggle */
  .mobile-comparison-toggle {
    display: flex;
    align-items: center;
    padding-left: var(--space-md);
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
  }

  .comparison-toggle-btn {
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-white);
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-direction: row-reverse; /* Icon on right, text on left */
  }

  .comparison-toggle-btn .toggle-icon {
    width: 24px;
    height: 24px;
    transition: all 0.2s ease;
  }

  .toggle-label {
    text-align: right;
    min-width: 50px;
  }

  /* Tighter spacing on smaller screens */
  @media (max-width: 768px) {
    .tab-header {
      gap: var(--space-sm);
    }

    .tab-list {
      gap: var(--space-sm);
      /* Let tabs use natural space, only scroll when actually needed */
    }

    .mobile-comparison-toggle {
      padding-left: var(--space-sm);
    }

    .comparison-toggle-btn {
      font-size: 10px;
    }

    .toggle-label {
      min-width: 45px;
    }

    .tab-btn {
      font-size: 10px;
      white-space: nowrap;
    }
  }

  /* Show only active comparison on mobile */
  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .comparison-item {
    display: none;
  }

  .comparison-item.active {
    display: flex;
  }

  /* Stack stats grid */
  .impact-stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* Reduce full-bleed padding */
  .full-bleed-dark {
    padding-block: var(--space-xl);
  }
}

/* Desktop: hide toggle, show both images */
@media (min-width: 901px) {
  .mobile-comparison-toggle {
    display: none;
  }

  .comparison-grid {
    grid-template-columns: 1fr 1fr;
  }

  .comparison-item {
    display: flex !important;
  }
}

/* === 600px: Aggressive mobile optimization === */
@media (max-width: 600px) {
  /* Typography scaling */
  .story-content h1 {
    font-size: 28px;
    line-height: 1.3;
    margin-bottom: var(--space-md);
  }

  .story-content h2 {
    font-size: 20px;
    margin-bottom: var(--space-sm);
  }

  .story-content p {
    font-size: 14px;
  }

  /* Tighter spacing between sections */
  .story-content section {
    margin-top: var(--space-lg);
  }

  /* Reduce full-bleed padding further */
  .full-bleed-dark {
    padding-block: var(--space-lg);
  }

  /* Smaller tab buttons */
  .tab-btn {
    font-size: 10px;
    padding: 0.4rem 0;
  }

  /* Tighter comparison grid */
  .comparison-grid {
    gap: var(--space-md);
  }

  /* Smaller caption text */
  .caption {
    font-size: 10px;
  }

  .quickLabel {
    font-size: 10px;
  }
}

/* 7. STATS STYLING */

.impact-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  margin: var(--space-xl) 0;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.stat-value {
  font-family: "IBM Plex Mono", monospace;
  font-size: 24px;
  color: var(--color-accent);
  font-weight: 600;
}

.stat-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  text-transform: uppercase;
  color: var(--color-midGrey);
  letter-spacing: 0.1em;
}