/* ============================================
   GRWPC Modern Polish — Enhanced Micro-interactions
   Safe, uniform, modern. Uses transform/opacity/filter only.
   ============================================ */

/* ── 1. Page entrance ── */
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
body {
  animation: pageFadeIn 0.5s ease-out;
}

/* ── 2. Scroll-reveal for sections/cards ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4,0,0.2,1), transform 0.8s cubic-bezier(0.4,0,0.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}
.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.34,1.56,0.64,1);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ── 3. Navbar enhancements ── */
.navbar {
  transition: box-shadow 0.35s ease, background-color 0.35s ease;
}
.navbar.scrolled {
  box-shadow: 0 4px 24px rgba(13,71,161,0.18) !important;
}
.nav-link.active {
  position: relative;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 2px;
  height: 2px;
  background: #ffc107;
  border-radius: 2px;
  animation: navUnderlineIn 0.4s ease forwards;
}
@keyframes navUnderlineIn {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* ── 4. Card hover lift (safe) ── */
.feature, .staff-card, .dept-card, .committee-card, .info-card, .about-card, .facility-card, .program-card, .stat-card, .gallery-item, .news-card, .event-card {
  transition: transform 0.4s cubic-bezier(0.4,0,0.2,1), box-shadow 0.4s cubic-bezier(0.4,0,0.2,1), filter 0.4s ease;
  will-change: transform;
}
.feature:hover, .staff-card:hover, .dept-card:hover, .committee-card:hover, .info-card:hover, .about-card:hover, .facility-card:hover, .program-card:hover, .stat-card:hover, .gallery-item:hover, .news-card:hover, .event-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(13,71,161,0.12);
  filter: brightness(1.02);
}

/* ── 5. Button press & magnetic feel ── */
.btn, .sem-btn, .btn-download, .btn-outline-primary, .btn-light, .btn-primary, .btn-success, .btn-info, .btn-warning, button[type="submit"] {
  transition: transform 0.15s ease, box-shadow 0.25s ease, background-color 0.25s ease, filter 0.2s ease;
  will-change: transform;
  position: relative;
  overflow: hidden;
}
.btn:active, .sem-btn:active, .btn-download:active, .btn-outline-primary:active, .btn-light:active, .btn-primary:active, .btn-success:active, .btn-info:active, .btn-warning:active, button[type="submit"]:active {
  transform: scale(0.96);
}
.btn::after, .btn-primary::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 0; height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease;
}
.btn:hover::after, .btn-primary:hover::after {
  width: 200%; height: 200%;
}

/* ── 6. Link underline sweep ── */
a:not(.btn):not(.nav-link):not(.doc-link):not(.back-link):not(.dropdown-item) {
  position: relative;
  text-decoration: none;
}
a:not(.btn):not(.nav-link):not(.doc-link):not(.back-link):not(.dropdown-item)::after {
  content: '';
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--primary-light, #1976d2);
  transition: width 0.35s cubic-bezier(0.4,0,0.2,1);
}
a:not(.btn):not(.nav-link):not(.doc-link):not(.back-link):not(.dropdown-item):hover::after {
  width: 100%;
}

/* ── 7. Image zoom on hover ── */
.staff-photo, .hod-photo, .gallery-scroll-item img, .principal-card .staff-photo, .facility-img, .event-img, .news-img {
  transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
  will-change: transform;
}
.staff-card:hover .staff-photo, .staff-card:hover .hod-photo, .gallery-scroll-wrapper:hover .gallery-scroll-item img, .facility-card:hover .facility-img, .event-card:hover .event-img, .news-card:hover .news-img {
  transform: scale(1.05);
}

/* ── 8. Scroll-to-top button ── */
.scroll-top {
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.3s ease;
}
.scroll-top.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.scroll-top:not(.visible) {
  opacity: 0;
  transform: translateY(20px) scale(0.8);
  pointer-events: none;
}
.scroll-top:hover {
  box-shadow: 0 8px 25px rgba(13,71,161,0.35);
  transform: translateY(-3px) scale(1.05);
}

/* ── 9. Focus ring ── */
*:focus-visible {
  outline: 2px solid var(--primary-light, #1976d2);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── 10. Staggered entrance for grids ── */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  animation: staggerIn 0.55s ease forwards;
}
.stagger-children > *:nth-child(1) { animation-delay: 0.06s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.12s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.18s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.24s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.30s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.36s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.42s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.48s; }
@keyframes staggerIn {
  to { opacity: 1; transform: translateY(0); }
}

/* ── 11. Doc link slide ── */
.doc-link {
  transition: transform 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.doc-link:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(13,71,161,0.1);
}

/* ── 12. Hamburger animation ── */
.navbar-toggler .navbar-toggler-icon {
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.navbar-toggler[aria-expanded="true"] .navbar-toggler-icon {
  transform: rotate(90deg);
}

/* ── 13. Info item hover ── */
.info-item {
  transition: background-color 0.25s ease, border-left-color 0.25s ease, transform 0.25s ease;
}
.info-item:hover {
  background-color: #f0f7ff;
  transform: translateX(3px);
}

/* ── 14. Hero floating badge ── */
@keyframes heroFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.hero .icon-badge, .hero-icon {
  animation: heroFloat 4s ease-in-out infinite;
}

/* ── 15. Custom scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
  background: #b0b8c4;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #8a95a5;
}

/* ── 16. Section heading accent underline ── */
.section-title, .section-heading, h2.text-center, .page-title {
  position: relative;
}
.section-title::after, .section-heading::after, h2.text-center::after, .page-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary, #0d47a1), var(--primary-light, #1976d2));
  border-radius: 2px;
  margin: 12px auto 0;
  transform: scaleX(0);
  transition: transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.section-title.visible::after, .section-heading.visible::after, h2.text-center.visible::after, .page-title.visible::after {
  transform: scaleX(1);
}

/* ── 17. Glassmorphism cards (subtle) ── */
.glass-card, .glass-panel {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 8px 32px rgba(13,71,161,0.08);
}

/* ── 18. Animated gradient border for important cards ── */
.gradient-border-card {
  position: relative;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
}
.gradient-border-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 2px;
  background: linear-gradient(135deg, #0d47a1, #1976d2, #42a5f5, #1976d2, #0d47a1);
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  animation: gradientMove 4s linear infinite;
  pointer-events: none;
}
@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ── 19. Counter animation number roll ── */
.counter-value {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ── 20. Page transition overlay ── */
.page-transition {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #0d47a1, #1976d2);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* ── 21. Pulse ring for CTA buttons ── */
@keyframes pulseRing {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.5); opacity: 0; }
}
.pulse-cta {
  position: relative;
}
.pulse-cta::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  border: 2px solid var(--accent, #ffc107);
  animation: pulseRing 2s ease-out infinite;
  pointer-events: none;
}

/* ── 22. Shimmer loading for skeleton ── */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

/* ── 23. Tilt effect for cards (subtle 3D) ── */
.tilt-card {
  transition: transform 0.3s ease;
  transform-style: preserve-3d;
  perspective: 1000px;
}
.tilt-card:hover {
  transform: rotateX(2deg) rotateY(2deg) translateY(-4px);
}

/* ── 24. Badge glow for status badges ── */
.status-badge {
  position: relative;
}
.status-badge::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: inherit;
  filter: blur(6px);
  opacity: 0.4;
  z-index: -1;
}

/* ── 25. Parallax section background (CSS-only) ── */
.parallax-bg {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}
@media (max-width: 768px) {
  .parallax-bg {
    background-attachment: scroll;
  }
}

/* ── 26. Text reveal clip animation ── */
@keyframes textReveal {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}
.text-reveal {
  animation: textReveal 0.8s cubic-bezier(0.4,0,0.2,1) forwards;
}

/* ── 27. Floating particles background (subtle) ── */
@keyframes floatParticle {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.3; }
  25% { transform: translateY(-20px) translateX(10px); opacity: 0.6; }
  50% { transform: translateY(-10px) translateX(-10px); opacity: 0.4; }
  75% { transform: translateY(-30px) translateX(5px); opacity: 0.5; }
}
.float-bg {
  position: relative;
  overflow: hidden;
}
.float-bg::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(13,71,161,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: floatParticle 8s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

/* ── 28. Social icon bounce ── */
.social-icon {
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), color 0.3s ease;
}
.social-icon:hover {
  transform: translateY(-4px) scale(1.15);
}

/* ── 29. Table row hover ── */
.table-hover tbody tr {
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.table-hover tbody tr:hover {
  background-color: #f0f7ff !important;
  transform: translateX(4px);
}

/* ── 30. Accordion smooth expand ── */
.accordion-item {
  transition: box-shadow 0.3s ease;
}
.accordion-item:hover {
  box-shadow: 0 4px 16px rgba(13,71,161,0.08);
}
.accordion-button {
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ── 31. Form input focus glow ── */
.form-control, input[type="text"], input[type="email"], textarea, select {
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}
.form-control:focus, input:focus, textarea:focus, select:focus {
  border-color: var(--primary-light, #1976d2);
  box-shadow: 0 0 0 4px rgba(25,118,210,0.15);
  transform: translateY(-1px);
}

/* ── 32. Tab underline slide ── */
.nav-pills .nav-link, .nav-tabs .nav-link {
  position: relative;
  transition: color 0.3s ease;
}
.nav-pills .nav-link::after, .nav-tabs .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--primary, #0d47a1);
  border-radius: 3px;
  transition: width 0.3s ease, left 0.3s ease;
}
.nav-pills .nav-link:hover::after, .nav-tabs .nav-link:hover::after,
.nav-pills .nav-link.active::after, .nav-tabs .nav-link.active::after {
  width: 80%;
  left: 10%;
}

/* ── 33. Breadcrumb hover ── */
.breadcrumb-item a {
  transition: color 0.3s ease, padding-left 0.3s ease;
}
.breadcrumb-item a:hover {
  color: var(--primary-light, #1976d2);
  padding-left: 4px;
}

/* ── 34. Progress bar shimmer ── */
.progress-bar {
  position: relative;
  overflow: hidden;
}
.progress-bar::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: progressShimmer 2s infinite;
}
@keyframes progressShimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* ── 35. Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  body { animation: none; }
  .parallax-bg { background-attachment: scroll; }
}

/* ── 36. Mobile safe adjustments ── */
@media (max-width: 768px) {
  .feature:hover, .staff-card:hover, .dept-card:hover, .committee-card:hover, .info-card:hover, .about-card:hover, .facility-card:hover, .program-card:hover, .stat-card:hover, .gallery-item:hover, .news-card:hover, .event-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(13,71,161,0.08);
  }
  .hero .icon-badge, .hero-icon {
    animation: none;
  }
  .staff-card:hover .staff-photo, .staff-card:hover .hod-photo, .gallery-scroll-wrapper:hover .gallery-scroll-item img, .facility-card:hover .facility-img, .event-card:hover .event-img, .news-card:hover .news-img {
    transform: scale(1.02);
  }
  .gradient-border-card::before {
    animation: none;
  }
  .pulse-cta::before {
    animation: none;
  }
  .table-hover tbody tr:hover {
    transform: none;
  }
  .reveal-left, .reveal-right {
    transform: translateY(40px);
  }
  .reveal-left.visible, .reveal-right.visible {
    transform: translateY(0);
  }
}