:root {
  --bg-color-light: #ffffff;
  --text-color-light: #333;
  --bg-color-dark: #1e1e1e;
  --text-color-dark: #f0f0f0;
  --accent-color: #2c3e50;
  --accent-hover: #3498db;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  max-width: 100vw; /* Make full width */
  margin: 0;
  color: var(--text-color-light);
  background-color: var(--bg-color-light);
  transition: color 0.3s, background-color 0.3s;
  padding-left: 20px;
  padding-right: 20px;
}

p {
  margin: 4px 0;
}

.dark-mode {
  background-color: var(--bg-color-dark);
  color: var(--text-color-dark);
}
.header {
  text-align: center;
  padding: 10px 0;
  background: #f5f5f5;
  border-radius: 8px;
  margin-bottom: 30px;
}
h1 {
  color: var(--accent-color);
  margin-bottom: 10px;
  margin-top: 5px;
}
.authors {
  font-size: 1.1em;
  margin-bottom: 20px;
  text-align: center;
  line-height: 1.6;
}
.authors a {
  color: #1a73e8;
  text-decoration: none;
}

.authors sup {
  font-size: 18px;
  vertical-align: super;
}

.authors em {
  font-size: 14px;
}
.abstract {
  scroll-margin-top: 50px;
  background: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
  margin: 20px 0;
}
h2 {
  color: var(--accent-color);
  border-bottom: 2px solid #eee;
  padding-bottom: 10px;
  margin-top: 10px;
  padding-left: 10px;
}
.content-section {
  margin-top: 10px;
  scroll-margin-top: 50px;
  margin-bottom: 40px;
}
.footer {
  text-align: center;
  margin-top: 50px;
  padding: 20px;
  border-top: 1px solid #eee;
  background: #f9f9f9;
}
.nav {
  position: sticky;
  z-index: 1000;
  top: 0;
  background: var(--bg-color-light);
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}
.nav.dark-mode {
  background: var(--bg-color-dark);
}
.nav a {
  margin: 0 10px;
  color: var(--accent-color);
  text-decoration: none;
}
.nav a:hover {
  color: #3498db;
}
.toggle-btn {
  background-color: #517599;
  color: #fff;
  border: none;
  padding: 5px 15px;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
  position: absolute;
  top: 10px;
  right: 10px;
}

.toggle-btn:hover {
  background-color: var(--accent-hover);
}
.buttons {
  display: flex;
  justify-content: center;
  margin-top: 30px;
  flex-wrap: wrap;
}

.buttons a {
  display: inline;
  padding: 10px 20px;
  margin: 2px 10px;
  background-color: #2c3e50;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s;
}

.buttons a:hover {
  background-color: #3498db;
}

.video-section {
  margin-top: 40px;
}

.video-section h2 {
  text-align: center;
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  overflow: hidden;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Point Cloud Visualization Styles */
.pointcloud-section {
  margin-top: 40px;
  margin-bottom: 40px;
}

.pointcloud-container {
  position: relative;
  width: 100%;
  height: 500px;
  border: 2px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  background-color: #000;
}

#pointcloud-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.pointcloud-controls {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
}

/* 3D Model Viewer Styles */
.model-viewer-section {
  margin-top: 40px;
  margin-bottom: 40px;
}

.model-container {
  position: relative;
  width: 100%;
  height: 500px;
  border: 2px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  background-color: #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.model-viewer {
  width: 100%;
  height: 100%;
  border-radius: 8px;
}

.model-controls {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
}

/* Advanced Point Cloud Viewer Styles */
.advanced-pointcloud-section {
  margin-top: 40px;
  margin-bottom: 40px;
}

.advanced-pointcloud-container {
  position: relative;
  width: 100%;
  height: 600px;
  border: 2px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  background-color: #000;
  display: flex;
}

#advanced-pointcloud-canvas {
  flex: 1;
  display: block;
}

.pointcloud-ui {
  width: 250px;
  background: rgba(255, 255, 255, 0.95);
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.pointcloud-controls-panel {
  flex: 1;
}

.pointcloud-controls-panel h4 {
  margin: 0 0 15px 0;
  color: #333;
  font-size: 16px;
}

.pointcloud-controls-panel label {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  color: #333;
}

.pointcloud-controls-panel input[type="range"] {
  width: 100%;
  margin-top: 5px;
}

.pointcloud-controls-panel input[type="checkbox"] {
  margin-right: 8px;
}

.pointcloud-controls-panel button {
  width: 100%;
  padding: 8px;
  margin-bottom: 8px;
  background: #2c3e50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.pointcloud-controls-panel button:hover {
  background: #3498db;
}

.pointcloud-info {
  padding: 10px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  font-size: 11px;
  color: #333;
}

@media (max-width: 768px) {
  .advanced-pointcloud-container {
    flex-direction: column;
    height: auto;
  }
  
  .pointcloud-ui {
    width: 100%;
    order: -1;
  }
  
  #advanced-pointcloud-canvas {
    height: 400px;
  }
}
.bibtex-section {
  position: relative;
  margin-top: 40px;
}

.bibtex-section pre {
  padding: 20px;
  background-color: #f5f5f5;
  overflow-x: auto;
}

.bibtex-copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: #517599;
  color: #fff;
  border: none;
  padding: 5px 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.bibtex-copy-button:hover {
  background-color: #3498db;
}
.carousel-container {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  margin-bottom: 40px;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.carousel-slide {
  flex: 0 0 calc(33.333% - 20px);
  margin: 0 10px;
  height: 300px;
}

.carousel-slide img,
.carousel-slide iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
  border: none;
}

.carousel-button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.8);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  z-index: 10;
}

.carousel-button:hover {
  background: rgba(255, 255, 255, 1);
}

.carousel-button.prev {
  left: 10px;
}

.carousel-button.next {
  right: 10px;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ccc;
  border: none;
  cursor: pointer;
  padding: 0;
}

.indicator.active {
  background: #3b82f6;
}
.scrollUpBtn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: none;
  background-color: #517599;
  color: white;
  border: none;
  border-radius: 50%;
  padding: 15px;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  width: 50px;
  height: 50px;
}

.scrollUpBtn:hover {
  background-color: #3498db;
}

.dark-mode .header,
.dark-mode .abstract,
.dark-mode .footer,
.dark-mode .buttons a,
.dark-mode h1,
.dark-mode h2,
.dark-mode .bibtex-section pre {
  background-color: #333;
  color: var(--text-color-dark);
}
.dark-mode .nav a {
  color: var(--text-color-dark);
}
.dark-mode .buttons a:hover {
  background-color: #3498db;
}
.dark-mode .nav a:hover {
  color: #3498db;
}

/* Dark mode styles for 3D visualizations */
.dark-mode .pointcloud-container,
.dark-mode .advanced-pointcloud-container {
  border-color: #555;
}

.dark-mode .model-container {
  border-color: #555;
  background-color: #2a2a2a;
}

.dark-mode .pointcloud-ui {
  background: rgba(51, 51, 51, 0.95);
}

.dark-mode .pointcloud-controls-panel h4,
.dark-mode .pointcloud-controls-panel label,
.dark-mode .pointcloud-info {
  color: #f0f0f0;
}

.dark-mode .pointcloud-info {
  background: rgba(255, 255, 255, 0.1);
}

.dark-mode .pointcloud-section h3,
.dark-mode .model-viewer-section h3,
.dark-mode .advanced-pointcloud-section h3 {
  color: var(--text-color-dark);
}

/* Point Cloud Grid Styles */
.pointcloud-grid-section {
  margin-top: 40px;
  margin-bottom: 40px;
}

.pointcloud-grid-container {
  width: 100%;
  margin: 20px 0;
}

.pointcloud-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  width: 100%;
  padding: 20px 0;
}

.pointcloud-grid-item {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 2px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.pointcloud-grid-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.pointcloud-grid-canvas-container {
  width: 100%;
  height: 300px;
  position: relative;
  background: #ffffff;
}

.pointcloud-grid-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.pointcloud-grid-label {
  padding: 15px;
  text-align: center;
  font-weight: bold;
  font-size: 14px;
  color: #333;
  background: #f8f9fa;
  border-top: 1px solid #eee;
}

.pointcloud-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 15px;
  padding: 60px;
  color: #333;
  grid-column: 1 / -1;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #f3f3f3;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.pointcloud-error {
  text-align: center;
  padding: 40px;
  color: #e74c3c;
  grid-column: 1 / -1;
}

.pointcloud-error p {
  margin-top: 10px;
  font-size: 12px;
  color: #666;
  line-height: 1.4;
}

/* Dark mode styles for point cloud grid */
.dark-mode .pointcloud-grid-item {
  background: #333;
  border-color: #555;
}

.dark-mode .pointcloud-grid-canvas-container {
  background: #ffffff; /* Keep white background for point clouds */
}

.dark-mode .pointcloud-grid-label {
  background: #444;
  color: #f0f0f0;
  border-top-color: #555;
}

.dark-mode .pointcloud-loading {
  color: #f0f0f0;
}

.dark-mode .pointcloud-error {
  color: #ff6b6b;
}

.dark-mode .pointcloud-error p {
  color: #ccc;
}

/* Responsive grid */
@media (max-width: 1600px) {
  .pointcloud-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 1200px) {
  .pointcloud-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .pointcloud-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pointcloud-grid-canvas-container {
    height: 250px;
  }
}

@media (max-width: 600px) {
  .pointcloud-grid {
    grid-template-columns: 1fr;
  }
  
  body {
    padding-left: 10px;
    padding-right: 10px;
  }
}