/* Portfolio Section */
.portfolio-section {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 50%, #f8fafc 100%);
  position: relative;
  min-height: 100vh;
}

.portfolio-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="80" height="80" viewBox="0 0 80 80" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23334155" fill-opacity="0.03"><circle cx="40" cy="40" r="2"/><circle cx="20" cy="20" r="1"/><circle cx="60" cy="20" r="1"/><circle cx="20" cy="60" r="1"/><circle cx="60" cy="60" r="1"/></g></g></svg>') repeat;
  pointer-events: none;
}

/* Portfolio Filters */
.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
  padding: 0 var(--spacing-md);
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid transparent;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  color: #64748b;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 1);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.filter-btn i {
  font-size: 1rem;
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
  padding: 0 var(--spacing-md);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* Portfolio Cards */
.portfolio-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  opacity: 1;
  transform: scale(1);
  animation: cardFadeIn 0.6s ease-out forwards;
  cursor: pointer;
}

.portfolio-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--accent-primary);
}

/* Card Image */
.card-image {
  position: relative;
  overflow: hidden;
  height: 0;
  padding-bottom: 100%; /* Creates 1:1 aspect ratio (square) */
}

.card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

/* Card Overlay */
.card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.9), rgba(139, 92, 246, 0.9));
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
}

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

.card-actions {
  display: flex;
  gap: var(--spacing-md);
}

.action-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.action-btn:hover {
  background: rgba(255, 255, 255, 1);
  color: var(--accent-primary);
  transform: scale(1.1);
  border-color: white;
}

/* Card Content */
.card-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: #1e293b;
  margin: 0;
  line-height: 1.3;
}

.card-description {
  color: #64748b;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin: 0;
}

/* Card Tags */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: auto;
}

.tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: linear-gradient(135deg, var(--accent-primary), #9f7aea);
  color: white;
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
}

.tag:hover {
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Portfolio Actions */
.portfolio-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-xl);
}

.load-more-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--accent-primary), #9f7aea);
  color: white;
  border: none;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.load-more-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
  background: linear-gradient(135deg, #4338ca, #7c3aed);
}

/* Filtering Animations */
.portfolio-card {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-card.hidden {
  opacity: 0 !important;
  transform: scale(0.8) !important;
  pointer-events: none;
}

.portfolio-card.visible {
  opacity: 1 !important;
  transform: scale(1) !important;
  pointer-events: all;
}

/* Card Animation */
@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Stagger Animation for Cards */
.portfolio-card:nth-child(1) { animation-delay: 0.1s; }
.portfolio-card:nth-child(2) { animation-delay: 0.2s; }
.portfolio-card:nth-child(3) { animation-delay: 0.3s; }
.portfolio-card:nth-child(4) { animation-delay: 0.4s; }
.portfolio-card:nth-child(5) { animation-delay: 0.5s; }
.portfolio-card:nth-child(6) { animation-delay: 0.6s; }
.portfolio-card:nth-child(7) { animation-delay: 0.7s; }
.portfolio-card:nth-child(8) { animation-delay: 0.8s; }
.portfolio-card:nth-child(9) { animation-delay: 0.9s; }
.portfolio-card:nth-child(10) { animation-delay: 1.0s; }
.portfolio-card:nth-child(11) { animation-delay: 1.1s; }
.portfolio-card:nth-child(12) { animation-delay: 1.2s; }

/* Responsive Design */
@media (max-width: 768px) {
  .portfolio-section {
    padding: var(--spacing-xl) 0;
  }

  .portfolio-filters {
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
  }

  .filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
  }

  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    padding: 0 var(--spacing-sm);
  }

  .card-content {
    padding: var(--spacing-md);
  }

  .card-title {
    font-size: var(--font-size-base);
  }

  .card-description {
    font-size: var(--font-size-xs);
  }
}

@media (max-width: 480px) {
  .portfolio-filters {
    flex-direction: column;
    align-items: center;
  }

  .filter-btn {
    width: 100%;
    max-width: 200px;
    justify-content: center;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .action-btn {
    width: 40px;
    height: 40px;
  }

  .card-actions {
    gap: var(--spacing-sm);
  }
}