/* ========================================
   PORTFOLIO.CSS - Gallery & Lightbox Styles
   ======================================== */

.projects-hero {
  background: var(--gradient-hero);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.projects-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  
  /* Sticky properties */
  position: sticky;
  top: 70px; /* Just below the navbar */
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.95);
  padding: 1rem 0;
  backdrop-filter: blur(8px);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.filter-btn {
  padding: 0.5rem 1.5rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.filter-btn:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

/* CSS Columns for Masonry Layout */
.projects-grid {
  column-count: 1;
  column-gap: var(--space-md);
}

@media (min-width: 640px) {
  .projects-grid {
    column-count: 2;
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    column-count: 3;
    column-gap: var(--space-lg);
  }
}

.projects-item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  cursor: zoom-in;
  transform: translateZ(0);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: block; /* For filtering logic */
}

@media (min-width: 1024px) {
  .projects-item {
    margin-bottom: var(--space-lg);
  }
}

.projects-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.projects-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.projects-item:hover img {
  transform: scale(1.05);
}

/* Lightbox Styles */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.lightbox-content {
  position: relative;
  transform: scale(0.95);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  opacity: 0;
}

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

.lightbox-content img {
  /* Ensure image fits within its container in the split view */
}

.lightbox-close {
  position: absolute;
  top: 15px;
  right: 25px;
  color: white;
  font-size: 3rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
  z-index: 10000;
}

.lightbox-close:hover {
  color: var(--color-primary);
}

/* Specifications Overlay (Grid) */
.project-specs-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
  color: white;
  padding: 2.5rem 1.5rem 1.5rem;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  pointer-events: none;
}

.project-specs-overlay h4 {
  margin: 0 0 0.25rem 0;
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--color-white);
}

.project-specs-overlay p {
  margin: 0;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.projects-item:hover .project-specs-overlay {
  opacity: 1;
  transform: translateY(0);
}

/* Lightbox Specs Panel Styles */
.lightbox-spec-item {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid #eee;
  padding-bottom: 1rem;
}
.lightbox-spec-item:last-child {
  border-bottom: none;
}
.lightbox-spec-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: #888;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.lightbox-spec-value {
  font-size: 1.1rem;
  color: #333;
  font-weight: 500;
}