/* ====================================================================
   Portfolio Section - Advanced Filtering & Interactive Gallery
   ==================================================================== */

.portfolio-section {
  position: relative;
  background: var(--color-white);
  overflow: hidden;
}

/* Portfolio Filter */
.portfolio-filter {
  margin-bottom: var(--space-12);
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 0.8s forwards;
  transform: translateY(20px);
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-gray-100);
  border-radius: var(--radius-2xl);
  position: relative;
  overflow: hidden;
}

.filter-tab {
  position: relative;
  padding: var(--space-3) var(--space-6);
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  z-index: 2;
}

.filter-tab:hover {
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.5);
}

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

.tab-indicator {
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition-base);
}

.filter-tab.active .tab-indicator {
  transform: translateX(-50%) scaleX(1);
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

.portfolio-item {
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  animation: portfolioItemReveal 0.6s ease-out forwards;
  transition: all var(--transition-slow);
}

.portfolio-item:nth-child(1) { animation-delay: 1.0s; }
.portfolio-item:nth-child(2) { animation-delay: 1.1s; }
.portfolio-item:nth-child(3) { animation-delay: 1.2s; }
.portfolio-item:nth-child(4) { animation-delay: 1.3s; }
.portfolio-item:nth-child(5) { animation-delay: 1.4s; }
.portfolio-item:nth-child(6) { animation-delay: 1.5s; }

@keyframes portfolioItemReveal {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Portfolio Card */
.portfolio-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-slow);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  border-color: var(--color-primary);
}

/* Portfolio Image */
.portfolio-image {
  position: relative;
  width: 100%;
  height: 280px;
  overflow: hidden;
  background: var(--color-gray-100);
}

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

.portfolio-card:hover .portfolio-img {
  transform: scale(1.05);
}

.portfolio-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  color: var(--color-white);
  opacity: 0.8;
}

/* Portfolio Overlay */
.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 25, 35, 0.92);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 3;
}

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

.portfolio-actions {
  display: flex;
  gap: var(--space-4);
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.portfolio-card:hover .portfolio-actions {
  transform: translateY(0);
}

.portfolio-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--color-white);
  color: var(--color-primary);
  border: none;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.portfolio-btn:hover {
  transform: translateY(-2px) scale(1.1);
  box-shadow: var(--shadow-xl);
  background: var(--color-primary);
  color: var(--color-white);
}

.portfolio-btn-view {
  background: var(--gradient-primary);
  color: var(--color-white);
}

.portfolio-btn-view:hover {
  background: var(--color-white);
  color: var(--color-primary);
}

/* Portfolio Content */
.portfolio-content {
  padding: var(--space-6);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.portfolio-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.portfolio-category {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.portfolio-client {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  font-weight: 500;
}

.portfolio-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.portfolio-excerpt {
  font-size: var(--text-base);
  color: var(--color-gray-600);
  line-height: 1.5;
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.portfolio-technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.tech-more {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  border-color: var(--color-gray-200);
}

/* Load More Button */
.portfolio-load-more {
  text-align: center;
  opacity: 0;
  animation: fadeInUp 0.6s ease-out 1.8s forwards;
  transform: translateY(20px);
}

.load-more-btn {
  min-width: 200px;
  border-radius: var(--radius-lg);
  border-color: var(--color-gray-300);
  color: var(--color-gray-700);
  font-weight: 500;
}

.load-more-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

/* Portfolio Modal */
.portfolio-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-4);
}

.portfolio-modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  cursor: pointer;
}

.modal-container {
  position: relative;
  max-width: 900px;
  max-height: 90vh;
  width: 100%;
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transform: scale(0.9) translateY(50px);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-2xl);
}

.portfolio-modal.active .modal-container {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 10;
}

.modal-close:hover {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.1) rotate(90deg);
}

.modal-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  height: 100%;
}

.modal-image {
  position: relative;
  overflow: hidden;
  background: var(--color-gray-100);
}

.modal-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-details {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-header {
  margin-bottom: var(--space-6);
}

.modal-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
  line-height: 1.2;
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.modal-client {
  font-size: var(--text-base);
  color: var(--color-primary);
  font-weight: 500;
}

.modal-description {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--space-8);
}

.modal-technologies {
  margin-bottom: var(--space-8);
}

.tech-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

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

.modal-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.modal-actions .btn {
  flex: 1;
  min-width: 150px;
  justify-content: center;
}

/* Filter Animation */
.portfolio-item.filter-hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}

.portfolio-item.filter-visible {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-6);
  }
  
  .modal-content {
    grid-template-columns: 1fr;
  }
  
  .modal-image {
    height: 300px;
  }
  
  .modal-details {
    max-height: none;
  }
}

@media (max-width: 768px) {
  .portfolio-section {
    padding: var(--space-16) 0;
  }
  
  .portfolio-filter {
    margin-bottom: var(--space-10);
  }
  
  .filter-tabs {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
    padding: var(--space-1);
  }
  
  .filter-tab {
    padding: var(--space-3) var(--space-4);
    text-align: center;
    justify-content: center;
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-12);
  }
  
  .portfolio-image {
    height: 240px;
  }
  
  .portfolio-content {
    padding: var(--space-5);
  }
  
  .portfolio-title {
    font-size: var(--text-lg);
  }
  
  .modal-container {
    margin: var(--space-4);
    max-height: calc(100vh - 2rem);
  }
  
  .modal-details {
    padding: var(--space-6);
  }
  
  .modal-title {
    font-size: var(--text-2xl);
  }
  
  .modal-description {
    font-size: var(--text-base);
  }
  
  .modal-actions {
    flex-direction: column;
  }
  
  .modal-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .filter-tabs {
    padding: var(--space-1);
  }
  
  .filter-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
  }
  
  .portfolio-card {
    border-radius: var(--radius-xl);
  }
  
  .portfolio-image {
    height: 200px;
  }
  
  .portfolio-content {
    padding: var(--space-4);
  }
  
  .portfolio-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  
  .portfolio-btn {
    width: 48px;
    height: 48px;
  }
  
  .portfolio-actions {
    gap: var(--space-3);
  }
  
  .modal-close {
    top: var(--space-3);
    right: var(--space-3);
    width: 36px;
    height: 36px;
  }
  
  .modal-details {
    padding: var(--space-4);
  }
  
  .modal-title {
    font-size: var(--text-xl);
  }
}

/* Loading Animation */
@keyframes portfolioItemLoading {
  0% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.7;
  }
  100% {
    opacity: 0.3;
  }
}

.portfolio-item.loading {
  animation: portfolioItemLoading 1.5s infinite;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .portfolio-card,
  .portfolio-img,
  .portfolio-overlay,
  .portfolio-actions,
  .portfolio-btn,
  .modal-container,
  .modal-close {
    transition: none;
    animation: none;
  }
  
  .portfolio-item {
    opacity: 1;
    transform: none;
    animation: none;
  }
  
  .portfolio-card:hover {
    transform: none;
  }
  
  .portfolio-card:hover .portfolio-img {
    transform: none;
  }
}