/* Advanced Performance Optimization CSS */
/* Ultra-optimized CSS for smooth performance and zero lag */

/* Critical Performance Base */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeSpeed;
  overflow-x: hidden;
}

/* Hardware Acceleration for Critical Elements */
.faculty-card,
.achievement-modal,
.site-header,
.brand-strip {
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

/* Optimized Image Loading */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: optimize-contrast;
  -ms-interpolation-mode: bicubic;
  max-width: 100%;
  height: auto;
  display: block;
}

.faculty-photo {
  will-change: transform, opacity;
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.faculty-photo:hover {
  transform: translateZ(0) scale(1.02);
}

/* Grid Performance Optimization */
.hod-grid,
.associate-grid,
.assistant-grid {
  display: grid;
  gap: 1.5rem;
  contain: layout style paint;
  will-change: contents;
}

.assistant-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.associate-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.hod-grid {
  grid-template-columns: 1fr;
  max-width: 400px;
  margin: 0 auto;
}

/* Faculty Card Performance */
.faculty-card {
  contain: layout style paint;
  isolation: isolate;
  transform: translateZ(0);
  transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.faculty-card:hover {
  transform: translateZ(0) translateY(-2px);
}

/* Modal Performance Optimization */
.achievement-modal {
  contain: layout style paint;
  isolation: isolate;
  transform: translateZ(0);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.achievement-modal.active {
  animation: modalFadeIn 0.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

/* Scroll Performance */
.main-content {
  contain: layout style paint;
  overflow-anchor: none;
}

/* LinkedIn Icon Optimization */
.faculty-linkedin svg {
  will-change: transform;
  transition: transform 0.15s ease-out;
  transform: translateZ(0);
}

.faculty-linkedin:hover svg {
  transform: translateZ(0) scale(1.1);
}

/* Text Rendering Optimization */
.faculty-name,
.faculty-designation {
  text-rendering: optimizeSpeed;
  font-display: swap;
}

/* Container Query Support */
@supports (container-type: inline-size) {
  .faculty-section {
    container-type: inline-size;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .faculty-card,
  .faculty-photo,
  .faculty-linkedin svg {
    will-change: auto;
    transform: none !important;
  }
}

/* High Performance Media Queries */
@media (min-width: 768px) {
  .assistant-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .assistant-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .associate-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1200px) {
  .assistant-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Print Optimization */
@media print {
  .faculty-card,
  .achievement-modal,
  .faculty-photo {
    will-change: auto;
    transform: none;
    transition: none;
    animation: none;
  }
}

/* GPU Layer Creation for Smooth Scrolling */
.faculty-section {
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

/* Optimize Focus States */
.faculty-card:focus-visible {
  outline: 2px solid #007bff;
  outline-offset: 2px;
  transform: translateZ(0) translateY(-2px);
}

/* Critical Resource Hints */
.faculty-photo[loading="lazy"] {
  content-visibility: auto;
  contain-intrinsic-size: 200px 200px;
}

/* Memory Optimization */
.achievement-modal:not(.active) {
  content-visibility: hidden;
  contain-intrinsic-size: 800px 600px;
}

/* ========================================
   GALLERY MODAL OPTIMIZATION
   ======================================== */

.gallery-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, visibility;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

.gallery-modal__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  cursor: pointer;
}

.gallery-modal__container {
  position: relative;
  width: auto;
  max-width: 90vw;
  max-height: 90vh;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
  display: flex;
  flex-direction: column;
}

.gallery-modal--active .gallery-modal__container {
  transform: scale(1);
}

.gallery-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 25px;
  background: #f8f9fa;
  border-bottom: 1px solid #e9ecef;
  flex-shrink: 0;
}

.gallery-modal__title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
}

.gallery-modal__close {
  background: none;
  border: none;
  font-size: 2rem;
  color: #666;
  cursor: pointer;
  padding: 5px;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.gallery-modal__close:hover {
  background-color: #e9ecef;
  color: #333;
}

.gallery-modal__content {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.gallery-modal__slideshow {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #000;
}

.gallery-modal__track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.gallery-modal__slide {
  flex: 0 0 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  overflow: hidden;
}

.gallery-modal__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  will-change: transform;
  image-rendering: crisp-edges;
}

.gallery-modal__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.9);
  border: none;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.5rem;
  color: #333;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, transform 0.2s ease;
  will-change: transform, background-color;
  z-index: 10;
}

.gallery-modal__nav:hover {
  background: rgba(255, 255, 255, 1);
  transform: translateY(-50%) scale(1.1);
}

.gallery-modal__nav--prev {
  left: 20px;
}

.gallery-modal__nav--next {
  right: 20px;
}

.gallery-modal__indicators {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 15px;
  background: #f8f9fa;
  flex-shrink: 0;
}

.gallery-modal__indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: none;
  background: #dee2e6;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
  will-change: transform, background-color;
}

.gallery-modal__indicator:hover {
  background: #adb5bd;
  transform: scale(1.2);
}

.gallery-modal__indicator.active {
  background: #007bff;
}

/* Activity Card Enhancements */
.activity-card {
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, box-shadow;
}

.activity-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.activity-card--active {
  animation: cardFadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Gallery Slideshow Optimizations */
.gallery-slideshow {
  will-change: transform;
  contain: layout style paint;
  isolation: isolate;
}

.gallery-slideshow__track {
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
}

.gallery-slideshow img {
  will-change: transform, opacity;
  image-rendering: crisp-edges;
  transition: opacity 0.3s ease;
}

.gallery-slideshow img:not(.loaded) {
  opacity: 0;
}

.gallery-slideshow img.loaded {
  opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .gallery-modal__container {
    width: 95%;
    max-height: 95%;
  }
  
  .gallery-modal__header {
    padding: 15px 20px;
  }
  
  .gallery-modal__title {
    font-size: 1.25rem;
  }
  
  .gallery-modal__nav {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }
  
  .gallery-modal__nav--prev {
    left: 10px;
  }
  
  .gallery-modal__nav--next {
    right: 10px;
  }
  
  .gallery-modal__indicators {
    padding: 15px;
    gap: 8px;
  }
  
  .gallery-modal__indicator {
    width: 10px;
    height: 10px;
  }
}

/* High Performance Mode */
@media (prefers-reduced-motion: reduce) {
  .gallery-modal,
  .gallery-modal__container,
  .gallery-modal__track,
  .gallery-modal__nav,
  .gallery-modal__indicator,
  .activity-card {
    transition: none !important;
    animation: none !important;
    will-change: auto !important;
  }
}