/* Projects Section Styles */
.projects-section {
  background-color: var(--bg-secondary);
}

.project-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-btn {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  border: 2px solid var(--border-color);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-2px);
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.project-card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
  border: 1px solid var(--border-color);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.project-card.featured-project {
  border: 2px solid var(--accent-color);
  position: relative;
}

.project-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 2;
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.1);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.9), rgba(16, 185, 129, 0.9));
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: var(--space-4);
}

.project-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-base);
  text-decoration: none;
  font-weight: var(--font-medium);
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.project-link:hover {
  background-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.project-content {
  padding: var(--space-8);
}

.project-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--leading-relaxed);
}

.project-impact {
  margin-bottom: var(--space-6);
}

.project-impact h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.impact-list {
  list-style: none;
}

.impact-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.impact-list li::before {
  content: '✓';
  color: var(--accent-color);
  font-weight: var(--font-bold);
  font-size: var(--text-base);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-stack .tech-tag {
  background: linear-gradient(135deg, var(--primary-light), var(--accent-color));
  color: var(--primary-color);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
}

.tech-stack .tech-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.projects-cta {
  text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
  .project-filters {
    gap: var(--space-2);
  }
  
  .filter-btn {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .project-content {
    padding: var(--space-6);
  }
  
  .project-image {
    height: 180px;
  }
  
  .project-links {
    flex-direction: column;
    gap: var(--space-2);
  }
  
  .project-link {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .project-content {
    padding: var(--space-4);
  }
  
  .project-title {
    font-size: var(--text-lg);
  }
  
  .project-image {
    height: 160px;
  }
  
  .filter-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}

/* Animation for project cards */
.project-card {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }

/* Filter animation */
.project-card.filtered-out {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease-out;
}

.project-card.filtered-in {
  opacity: 1;
  transform: scale(1);
  transition: all 0.3s ease-out;
}

/* Featured project special effects */
.featured-project::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--accent-color), var(--primary-color), var(--accent-color));
  border-radius: var(--radius-lg);
  z-index: -1;
  animation: borderGlow 3s ease-in-out infinite;
}

@keyframes borderGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Hover effects */
.project-card:hover .tech-stack .tech-tag {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: white;
}

.project-card:hover .impact-list li::before {
  transform: scale(1.2);
}

/* Focus states for accessibility */
.project-card:focus-within {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.filter-btn:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.project-link:focus {
  outline: 2px solid white;
  outline-offset: 2px;
}