/* Projects page: tabs, grid, filter, lightbox */

.projects-main {
  padding-bottom: 4rem;
}

.projects-section {
  padding: 3rem var(--page-gutter);
}

.page-tabs {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.page-tab {
  padding: 0.6rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--primary-blue);
  background: var(--white);
  color: var(--primary-blue);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.page-tab:hover {
  background: var(--light-gray);
}

.page-tab.active {
  background: var(--primary-blue);
  color: var(--white);
}

.tab-panel[hidden] {
  display: none;
}

.plans-intro {
  text-align: center;
  margin-bottom: 2rem;
}

.plans-intro .section-title {
  margin-bottom: 0.5rem;
}

.plans-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.plan-item {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.plan-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.plan-item img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.plan-label {
  display: block;
  padding: 0.75rem 1rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-blue);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.6rem 1.25rem;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  border: 2px solid var(--primary-blue);
  background: var(--white);
  color: var(--primary-blue);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

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

.filter-btn.active:hover {
  background: var(--blue-dark);
  color: var(--white);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  max-width: 1200px;
  margin: 0 auto;
}

.project-item {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition), box-shadow var(--transition), opacity 0.4s ease;
  cursor: pointer;
}

.project-item.hidden {
  display: none;
}

.project-item.visible {
  display: block;
  animation: projectFade 0.4s ease forwards;
}

@keyframes projectFade {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.project-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium);
}

.project-item-image {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--light-gray);
}

.project-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.project-item:hover .project-item-image img {
  transform: scale(1.06);
}

.project-category {
  display: inline-block;
  margin: 1rem 1rem 0.25rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--light-gray);
  color: var(--primary-blue);
  border-radius: 4px;
}

.project-item h3 {
  color: var(--primary-blue);
  font-size: 1.1rem;
  margin: 0 1rem 0.5rem;
}

.project-item p {
  font-size: 0.9rem;
  color: var(--dark-gray);
  margin: 0 1rem 1.25rem;
  line-height: 1.5;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--page-gutter, 1rem);
}

.lightbox[hidden] {
  display: none;
}

.lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  cursor: pointer;
}

.lightbox-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
  margin-top: 1rem;
  color: var(--white);
  text-align: center;
  font-size: 1rem;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 2;
  width: 44px;
  height: 44px;
  font-size: 2rem;
  line-height: 1;
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--transition);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
  .plans-grid {
    grid-template-columns: 1fr;
  }
  .lightbox-close {
    top: 1rem;
    right: 1rem;
  }
}