/* LGTM - Minimal Academic Website */

:root {
  --navbar-height: 56px;
  /* Pure colors from LGTM logo */
  --primary-color: #1976D2;
  --primary-light: #42A5F5;
  --primary-dark: #1565C0;
  --primary-hover: #2196F3;
  --accent-color: #C62828;
  --accent-hover: #B71C1C;
  --orange-accent: #E67E22;
  --green-accent: #4CAF50;
  --neutral-color: #757575;
  --border-color: #E3F2FD;
  /* Elegant, minimal styling variables */
  --border-width: 1px;
  --border-radius: 8px;
  --transition-speed: 0.2s;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Minimal custom typography */
body {
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  padding-top: var(--navbar-height);
}

/* Page content fade-in on load */
.page-content {
  animation: pageFadeIn 0.4s ease-out;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Subpage header */
.subpage-header {
  padding: 2rem 0 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.subpage-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.subpage-header p {
  color: var(--neutral-color);
  margin-bottom: 0;
}

/* Authors Section */
.authors-section {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.author-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 0;
  font-size: 1.05rem;
  line-height: 1.8;
}

.author-list .author {
  white-space: nowrap;
}

.author-list .author:not(:last-child)::after {
  content: ",\00a0";
  color: var(--neutral-color);
}

.author-list .author a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

.author-list .author a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.author-list .author sup {
  font-size: 0.65em;
  color: var(--neutral-color);
  margin-left: 1px;
}

.author-marker {
  font-style: normal;
}

.author-affiliations {
  margin-top: 0.35rem;
  font-size: 0.92rem;
  color: #333333;
  display: flex;
  justify-content: center;
  gap: 1.25rem;
}

.author-affiliations sup {
  font-size: 0.7em;
  margin-right: 2px;
}

.author-notes {
  margin-top: 0.25rem;
  font-size: 0.82rem;
  color: #333333;
  display: flex;
  justify-content: center;
  gap: 1.25rem;
}

.author-notes .author-marker {
  margin-right: 2px;
}

.author-venue {
  margin-top: 0.35rem;
  font-size: 1.08rem;
  color: #333333;
  text-align: center;
}

/* CTA cards for home page navigation */
.cta-section {
  padding: 2rem 0 3rem;
}

.cta-card {
  display: block;
  padding: 1.5rem;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  background: white;
  text-decoration: none !important;
  color: inherit;
  transition: all var(--transition-speed) ease;
  height: 100%;
}

.cta-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.12);
  transform: translateY(-2px);
  color: inherit;
}

.cta-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.cta-card p {
  font-size: 0.9rem;
  color: var(--neutral-color);
  margin-bottom: 0;
}

.cta-card .bi {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  display: block;
}

/* Navbar - simple border instead of shadow */
.navbar {
  border-bottom: var(--border-width) solid var(--border-color);
  background-color: #fafbfc !important;
  backdrop-filter: blur(10px);
}

/* Remove any default navbar flex behavior */
.navbar>.container {
  display: block;
  width: 100%;
}

/* Ensure the col wrapper maintains flow */
.navbar .col-lg-10 {
  position: relative;
}

/* Navbar content wrapper - keep logo left and hamburger right */
.navbar-content-wrapper {
  display: flex;
  align-items: center;
  width: 100%;
  position: relative;
}

/* Navbar toggler - keep it on the right */
.navbar-toggler {
  border: var(--border-width) solid var(--border-color);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  flex-shrink: 0;
  margin-left: auto;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(25, 118, 210, 0.25);
  outline: none;
}

.navbar-toggler:hover {
  background-color: rgba(25, 118, 210, 0.05);
}

/* Desktop - navbar collapse inline */
@media (min-width: 992px) {
  .navbar-collapse {
    display: flex !important;
    flex-basis: auto;
    margin-left: auto;
  }

  .navbar-toggler {
    display: none;
  }
}

/* Navbar collapse - dropdown style on mobile */
@media (max-width: 991.98px) {

  /* Override Bootstrap's default collapsing behavior */
  .navbar-collapse {
    position: absolute !important;
    top: 100%;
    right: 0;
    left: auto;
    width: auto;
    min-width: 200px;
    background-color: white;
    border: var(--border-width) solid var(--border-color);
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: 0 4px 12px rgba(25, 118, 210, 0.08);
    z-index: 1050;
    margin-top: 0;
    overflow: hidden;
    /* Override Bootstrap inline styles */
    flex-basis: auto !important;
    flex-grow: 0 !important;
  }

  /* Hide by default */
  .navbar-collapse:not(.show) {
    display: none !important;
  }

  /* Show when toggled */
  .navbar-collapse.show {
    display: block !important;
    background-color: white;
  }

  /* Disable Bootstrap's height animation */
  .navbar-collapse.collapsing {
    display: none !important;
    transition: none !important;
    height: auto !important;
  }

  .navbar-nav {
    padding: 0.5rem 0;
    margin: 0;
    flex-direction: column;
  }

  .navbar-nav .nav-item {
    padding: 0;
  }

  .navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    text-align: right;
    white-space: nowrap;
    display: block;
  }

  .navbar-nav .nav-link:hover {
    background-color: rgba(25, 118, 210, 0.05);
  }
}

/* Active nav link for current page */
.navbar-nav .nav-link {
  position: relative;
}

.navbar-nav .nav-link:hover {
  text-decoration: none;
}

.navbar-nav .nav-link.active {
  color: var(--primary-color) !important;
  font-weight: 500;
}

.navbar-nav .nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

/* Active nav link indicator adjustment for mobile dropdown */
@media (max-width: 991.98px) {
  .navbar-nav .nav-link.active::after {
    display: none;
  }

  .navbar-nav .nav-link.active {
    background-color: rgba(25, 118, 210, 0.08);
    font-weight: 600;
  }

  /* Add a left border indicator for active items in dropdown */
  .navbar-nav .nav-link.active::before {
    content: "";
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background-color: var(--primary-color);
    border-radius: 3px 0 0 3px;
  }
}

/* Back to Top Button hover effect */
#backToTop {
  transition: all 0.3s ease;
}

#backToTop:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2) !important;
  background-color: var(--border-color) !important;
}

/* Navbar brand - visible by default, hidden on home page via JS */
.navbar-brand {
  opacity: 1;
  transition: opacity 0.3s ease;
  flex-shrink: 1;
  min-width: 0;
  margin-right: 0;
  text-decoration: none !important;
}

.navbar-brand:hover {
  color: inherit;
}

/* On home page, brand starts hidden and fades in on scroll (JS controlled) */
body.home-page .navbar-brand {
  opacity: 0;
}

/* Centered text in navbar */
.navbar-centered-text {
  opacity: 1;
  transition: opacity 0.3s ease;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 0;
}

body.home-page .navbar-centered-text {
  opacity: 0;
}

/* Ensure toggler and collapse are above centered text */
.navbar-toggler,
.navbar-collapse {
  position: relative;
  z-index: 1;
}

/* Link colors */
a {
  text-decoration: none;
  color: var(--primary-color);
}

a:hover {
  text-decoration: underline;
  color: var(--primary-dark);
}

/* Buttons - consistent styling */
.btn {
  border-width: var(--border-width);
  border-radius: var(--border-radius);
  transition: all var(--transition-speed) ease;
  font-weight: 600;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35);
}

.btn-outline-primary {
  background-color: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-outline-primary:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35);
}

.btn-outline-danger {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.btn-outline-danger:hover {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(198, 40, 40, 0.35);
}

.btn-outline-secondary {
  background-color: transparent;
  border-color: var(--neutral-color);
  color: var(--neutral-color);
}

.btn-outline-secondary:hover {
  background-color: var(--neutral-color);
  border-color: var(--neutral-color);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(117, 117, 117, 0.3);
}

/* Responsive images */
img {
  max-width: 100%;
  height: auto;
}

/* Image Comparison - Object-oriented design */
.image-comparison-container {
  margin-bottom: 0.5rem;
}

.image-comparison-row {
  position: relative;
}

.image-comparison-row .col {
  position: relative;
  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-wrapper {
  position: relative;
  width: 100%;
  background: #000;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.08);
  border-radius: var(--border-radius);
  aspect-ratio: 16 / 9;
}

.image-wrapper::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #ffffff;
  z-index: 1;
  pointer-events: none;
}

.image-wrapper::after {
  content: 'Loading...';
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color: #000000;
  font-size: 14px;
  font-weight: 300;
  z-index: 2;
  pointer-events: none;
}

.image-wrapper.loaded::before,
.image-wrapper.loaded::after {
  display: none;
}

.image-comparison-row img {
  cursor: crosshair;
  display: block;
  position: relative;
  width: 100%;
  height: auto;
  z-index: 3;
}

/* Zoom popup - positioned above the image */
.zoom-popup {
  position: absolute;
  border: var(--border-width) solid var(--primary-light);
  border-radius: var(--border-radius);
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 6px 24px rgba(25, 118, 210, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.95);
  background-repeat: no-repeat;
  background-color: white;
  display: none;
  left: 0;
  bottom: 100%;
  margin-bottom: 8px;
  overflow: hidden;
}

/* Region indicator on original image */
.region-indicator {
  position: absolute;
  border: var(--border-width) solid rgba(25, 118, 210, 0.6);
  background: rgba(25, 118, 210, 0.08);
  pointer-events: none;
  display: none;
  z-index: 500;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.8),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

/* Video Comparison Slider */
.video-comparison-container {
  max-width: 100%;
  margin: 0 auto;
}

.video-wrapper {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #000;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.08);
  border-radius: var(--border-radius);
  aspect-ratio: 16 / 9;
}

.video-wrapper::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #1a1a1a;
  z-index: 1;
  pointer-events: none;
}

.video-wrapper::after {
  content: 'Loading...';
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color: rgba(255, 255, 255, 0.7);
  font-size: 18px;
  font-weight: 500;
  z-index: 2;
  pointer-events: none;
}

.video-wrapper.loaded::before,
.video-wrapper.loaded::after {
  display: none;
}

.comparison-video,
.video-left,
.video-right {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  z-index: 3;
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  clip-path: inset(0 50% 0 0);
  z-index: 15;
  /* Increased z-index to cover text when slider moves */
}

.slider-handle {
  position: absolute;
  top: 0;
  left: 50%;
  width: 4px;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  cursor: ew-resize;
  transform: translateX(-50%);
  z-index: 20;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.video-wrapper.loaded .slider-handle {
  opacity: 1;
  pointer-events: auto;
}

.slider-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: white;
  transform: translateX(-50%);
}

.slider-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: white;
  border: var(--border-width) solid var(--primary-light);
  border-radius: 50%;
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transition: all var(--transition-speed) ease;
  cursor: ew-resize;
}

.slider-handle:hover .slider-button {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: translate(-50%, -50%) scale(1.1);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35);
}

.slider-button i {
  font-size: 16px;
  color: var(--primary-color);
  transition: color var(--transition-speed) ease;
}

.slider-handle:hover .slider-button i {
  color: white;
}

.video-label {
  position: absolute;
  top: 16px;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  pointer-events: none;
  z-index: 5;
  /* Reduced z-index to allow video overlay to cover when slider moves */
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
}

.video-wrapper.loaded .video-label {
  opacity: 1;
}

.video-label-left {
  left: 16px;
}

.video-label-right {
  right: 16px;
}

#play-pause-btn {
  min-width: 120px;
}

#play-pause-btn i {
  font-size: 18px;
}

/* Video Side by Side Comparison */
.video-sidebyside-container {
  max-width: 100%;
  margin: 0 auto;
}

.video-sidebyside-row {
  position: relative;
}

.video-sidebyside-col {
  position: relative;
  overflow: visible;
}

.video-sidebyside-wrapper {
  position: relative;
  width: 100%;
  overflow: visible;
  background: #000;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.08);
  border-radius: var(--border-radius);
}

.video-sidebyside-wrapper::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #1a1a1a;
  z-index: 1;
  pointer-events: none;
}

.video-sidebyside-wrapper::after {
  content: 'Loading...';
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color: rgba(255, 255, 255, 0.7);
  font-size: 18px;
  font-weight: 500;
  z-index: 2;
  pointer-events: none;
}

.video-sidebyside-wrapper.loaded::before,
.video-sidebyside-wrapper.loaded::after {
  display: none;
}

.video-sidebyside {
  width: 100%;
  height: auto;
  display: block;
  cursor: crosshair;
  position: relative;
  z-index: 3;
}

.video-sidebyside-label {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
}

.video-sidebyside-label-right {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
}

.video-sidebyside-wrapper.loaded .video-sidebyside-label,
.video-sidebyside-wrapper.loaded .video-sidebyside-label-right {
  opacity: 1;
}

/* Video details overlaid at bottom of video */
.video-sidebyside-details {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.3);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 400;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: nowrap;
  text-align: center;
}

.video-sidebyside-wrapper.loaded .video-sidebyside-details {
  opacity: 1;
}

/* LGTM Logo overlay */
.video-logo-overlay {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.video-logo-overlay img {
  height: 32px;
  width: auto;
  filter: drop-shadow(0px 2px 4px rgba(0, 0, 0, 0.5));
}

.video-sidebyside-wrapper.loaded .video-logo-overlay {
  opacity: 0.8;
}

/* Video zoom popup - similar to image zoom */
.video-zoom-popup {
  position: absolute;
  border: var(--border-width) solid var(--primary-light);
  border-radius: var(--border-radius);
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 6px 24px rgba(25, 118, 210, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.95);
  background-color: black;
  display: none;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(100% + 12px);
  overflow: hidden;
  min-width: 200px;
  min-height: 200px;
}

.video-zoom-popup canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Video region indicator */
.video-region-indicator {
  position: absolute;
  border: var(--border-width) solid rgba(25, 118, 210, 0.6);
  background: rgba(25, 118, 210, 0.08);
  pointer-events: none;
  display: none;
  z-index: 500;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.8),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

#play-pause-btn-sidebyside {
  min-width: 120px;
}

#play-pause-btn-sidebyside i {
  font-size: 18px;
}

/* Video Navigation Container - replaces video-nav-wrapper */
.video-nav-container {
  position: relative;
  width: 100%;
}

.video-nav-container .video-wrapper {
  width: 100%;
}

/* Side-by-side video row needs container query to prevent overflow */
.video-nav-container .video-sidebyside-row {
  width: 100%;
  margin-left: 0;
  margin-right: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
}

/* Force side-by-side layout on all screen sizes */
.video-sidebyside-row .video-sidebyside-col {
  flex: 0 0 50%;
  max-width: 50%;
  padding-left: 2px;
  padding-right: 2px;
}

/* Adjust padding for first and last columns */
.video-sidebyside-row>.video-sidebyside-col:first-child {
  padding-left: 0;
  padding-right: 2px;
}

.video-sidebyside-row>.video-sidebyside-col:last-child {
  padding-left: 2px;
  padding-right: 0;
}

/* For very small screens, ensure videos maintain aspect ratio */
@media (max-width: 576px) {
  .video-sidebyside-wrapper {
    min-height: 120px;
  }

  .video-sidebyside-label,
  .video-sidebyside-label-right {
    font-size: 11px;
    padding: 4px 8px;
  }

  .video-sidebyside-details,
  .video-slider-details-left,
  .video-slider-details-right,
  .video-looped-details {
    font-size: 11px;
    padding: 4px 8px;
  }
}

/* Video Navigation Buttons */
.video-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border: var(--border-width) solid var(--primary-light);
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.15);
  z-index: 10;
}

.video-nav-prev {
  left: -60px;
}

.video-nav-next {
  right: -60px;
}

.video-nav-btn:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35);
}

.video-nav-btn:hover i {
  color: white;
}

.video-nav-btn:active {
  transform: translateY(-50%) scale(1.05);
}

.video-nav-btn i {
  font-size: 24px;
  color: var(--primary-color);
  transition: color var(--transition-speed) ease;
}

.video-nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.video-nav-btn:disabled:hover {
  background: white;
  border-color: var(--primary-light);
  transform: translateY(-50%) scale(1);
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.15);
}

.video-nav-btn:disabled:hover i {
  color: var(--primary-color);
}

/* Video Navigation Button Wrapper */
.video-nav-btn-wrapper {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 10;
}

.video-nav-prev-wrapper {
  left: -75px;
}

.video-nav-next-wrapper {
  right: -75px;
}

.video-nav-btn-wrapper .video-nav-btn {
  position: static;
  transform: none;
  width: 56px;
  height: 56px;
}

.video-nav-btn-wrapper:hover .video-nav-btn {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: scale(1.1);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35);
}

.video-nav-btn-wrapper .video-nav-btn:active {
  transform: scale(1.05);
}

.video-nav-btn-wrapper .video-nav-btn i {
  font-size: 28px;
}

/* Video Navigation Label */
.video-nav-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-color);
  letter-spacing: 0.5px;
  line-height: 1.3;
  text-align: center;
  background: white;
  padding: 4px 10px;
  border-radius: 12px;
  border: var(--border-width) solid var(--primary-light);
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.12);
  transition: all var(--transition-speed) ease;
}

.video-nav-btn-wrapper:hover .video-nav-label {
  color: white;
  background: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

/* Responsive adjustments for smaller screens */
@media (max-width: 1200px) {
  .video-nav-prev-wrapper {
    left: -65px;
  }

  .video-nav-next-wrapper {
    right: -65px;
  }
}

@media (max-width: 992px) {
  .video-nav-btn-wrapper .video-nav-btn {
    width: 48px;
    height: 48px;
  }

  .video-nav-btn-wrapper .video-nav-btn i {
    font-size: 24px;
  }

  .video-nav-label {
    font-size: 11px;
    padding: 3px 8px;
  }

  .video-nav-prev-wrapper {
    left: -70px;
  }

  .video-nav-next-wrapper {
    right: -70px;
  }
}

/* Ensure video sections take remaining space */
.video-nav-wrapper .video-wrapper,
.video-nav-wrapper .video-sidebyside-row,
.video-nav-wrapper .video-content-wrapper {
  flex: 1;
  min-width: 0;
}

/* Context Images (Input Views) */
.context-images-row {
  max-width: 600px;
  margin: 0 auto;
}

.context-image-wrapper {
  position: relative;
  display: inline-block;
}

.context-image {
  max-width: 150px;
  width: 150px;
  height: auto;
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.12);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: crosshair;
  display: block;
}

/* Wrapper for side-by-side video content */
.video-sidebyside-content {
  width: 100%;
}

/* Wrapper for just the video area to position navigation buttons */
.video-sidebyside-video-wrapper {
  position: relative;
  width: 100%;
}

/* Reuse zoom popup and region indicator styles from comparison-row */
.context-image-wrapper .zoom-popup {
  position: absolute;
  border: var(--border-width) solid var(--primary-light);
  border-radius: var(--border-radius);
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 6px 24px rgba(25, 118, 210, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.95);
  background-repeat: no-repeat;
  background-color: white;
  display: none;
  left: 0;
  bottom: 100%;
  margin-bottom: 8px;
  overflow: hidden;
}

.context-image-wrapper .region-indicator {
  position: absolute;
  border: var(--border-width) solid rgba(25, 118, 210, 0.6);
  background: rgba(25, 118, 210, 0.08);
  pointer-events: none;
  display: none;
  z-index: 500;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.8),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.context-image-wrapper:hover .zoom-popup {
  display: block;
}

.context-image-wrapper:hover .region-indicator {
  display: block;
}

/* Video Slider Details */
.video-slider-details-left,
.video-slider-details-right {
  position: absolute;
  bottom: 12px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.3);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 400;
  pointer-events: none;
  z-index: 5;
  /* Reduced z-index to allow video overlay to cover when slider moves */
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: nowrap;
  text-align: center;
}

.video-slider-details-left {
  left: 12px;
}

.video-slider-details-right {
  right: 12px;
}

.video-wrapper.loaded .video-slider-details-left,
.video-wrapper.loaded .video-slider-details-right {
  opacity: 1;
}

/* Ensure images inside video labels don't have margins that affect label height */
.video-label img,
.video-sidebyside-label img,
.video-sidebyside-label-right img {
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  display: inline-block;
  vertical-align: middle;
}

/* Ensure label text and logo containers align properly */
.video-label .label-text,
.video-label .label-logo,
.video-sidebyside-label .label-text,
.video-sidebyside-label-right .label-text,
.video-sidebyside-label-right .label-logo {
  display: inline-flex;
  align-items: center;
}

/* Video Slider Logo */
.video-slider-logo {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.video-slider-logo img {
  height: 32px;
  width: auto;
  filter: drop-shadow(0px 2px 4px rgba(0, 0, 0, 0.5));
}

.video-wrapper.loaded .video-slider-logo {
  opacity: 0.8;
}

/* Video Looped Player */
.video-looped-container {
  max-width: 100%;
  margin: 0 auto;
}

.video-looped-content {
  width: 100%;
}

.video-looped-wrapper {
  position: relative;
  width: 100%;
  overflow: visible;
  background: #000;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.08);
  border-radius: var(--border-radius);
}

.video-looped-wrapper::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #1a1a1a;
  z-index: 1;
  pointer-events: none;
}

.video-looped-wrapper::after {
  content: 'Loading...';
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  color: rgba(255, 255, 255, 0.7);
  font-size: 18px;
  font-weight: 500;
  z-index: 2;
  pointer-events: none;
}

.video-looped-wrapper.loaded::before,
.video-looped-wrapper.loaded::after {
  display: none;
}

.video-looped {
  width: 100%;
  height: auto;
  display: block;
  cursor: crosshair;
  position: relative;
  z-index: 3;
}

.video-looped-label {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.video-looped-wrapper.loaded .video-looped-label {
  opacity: 1;
}

.video-looped-details {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.3);
  color: white;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 400;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s ease;
  white-space: nowrap;
  text-align: center;
}

.video-looped-wrapper.loaded .video-looped-details {
  opacity: 1;
}

/* Video Tabs Container */
.video-tabs-container {
  margin: 0.6rem 0;
}

.video-tabs-container .nav-tabs {
  border-bottom: var(--border-width) solid var(--border-color);
  margin-bottom: 0 !important;
  gap: 4px;
  background: transparent;
  padding: 0 8px 0 8px;
}

.video-tabs-container .nav-item {
  margin-bottom: 0;
}

.video-tabs-container .nav-link {
  color: var(--neutral-color);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  padding: 0.5rem 1rem;
  font-size: 14px;
  font-weight: 400;
  transition: all var(--transition-speed) ease;
  background: #ffffff;
  margin-bottom: calc(-1 * var(--border-width)) !important;
  position: relative;
  box-shadow: 0 1px 4px rgba(25, 118, 210, 0.06);
}

.video-tabs-container .nav-link:hover {
  color: var(--primary-color);
  background: rgba(25, 118, 210, 0.03);
  border-color: var(--primary-light) var(--primary-light) transparent;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.12);
  transform: translateY(-1px);
}

.video-tabs-container .nav-link.active {
  color: var(--primary-color);
  background: white;
  border-color: var(--primary-color) var(--primary-color) white;
  border-bottom-color: white !important;
  margin-bottom: calc(-1 * var(--border-width)) !important;
  z-index: 1;
  box-shadow: 0 -2px 8px rgba(25, 118, 210, 0.1);
  font-weight: 400;
}

.video-tabs-container .tab-content {
  padding-top: 0.5rem;
  border-top: none;
}

.video-tabs-container .tab-pane {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Back to Top Button */
.back-to-top-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border: 1px solid #42A5F5 !important;
  background: white !important;
  background-color: white !important;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.15);
  z-index: 1000;
}

.back-to-top-btn:hover {
  background: #1976D2 !important;
  background-color: #1976D2 !important;
  border-color: #1976D2 !important;
  transform: scale(1.1) !important;
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.35) !important;
}

.back-to-top-btn:hover i {
  color: white !important;
}

.back-to-top-btn:active {
  transform: scale(1.05) !important;
  background: #1976D2 !important;
  background-color: #1976D2 !important;
}

.back-to-top-btn:focus {
  outline: none;
  box-shadow: 0 0 0 0.2rem rgba(25, 118, 210, 0.25);
}

.back-to-top-btn i {
  font-size: 24px;
  color: #1976D2;
  transition: color 0.2s ease;
}