/* ==========================================================================
   Time-to-Move Project Page Styles
   ========================================================================== */

/* Root Variables */
:root {
  --primary-color: #4a90e2;
  --secondary-color: #667eea;
  --accent-color: #764ba2;
  --text-color: #333;
  --text-light: #666;
  --bg-color: #ffffff;
  --bg-light: #f8f9fa;
  --border-color: #e9ecef;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Page Container */
.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
  background-color: var(--bg-color);
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.05);
}

/* Header Section */
.paper-header {
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
  border-radius: 15px;
  margin-bottom: 3rem;
  box-shadow: var(--shadow);
}

.paper-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 1.5rem;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.paper-subtitle {
  font-size: 1.5rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 1.5rem;
}

.authors {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.author {
  display: inline-block;
}

.affiliations {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.conference {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 600;
  margin-bottom: 2rem;
}

/* Paper Links */
.paper-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.paper-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-color);
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.paper-btn:hover {
  background: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  text-decoration: none;
  color: var(--secondary-color);
}

.paper-btn svg {
  flex-shrink: 0;
}

/* Supplementary Navigation */
.supp-nav {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 2px solid rgba(255, 255, 255, 0.3);
}

.supp-nav a {
  color: white;
  font-weight: 500;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 25px;
  transition: all 0.3s ease;
}

.supp-nav a:hover {
  background: rgba(255, 255, 255, 0.2);
  text-decoration: none;
  transform: translateY(-2px);
}

/* Sections */
section {
  margin-bottom: 4rem;
  padding: 2.5rem;
  background: white;
  border-radius: 15px;
  box-shadow: var(--shadow);
  margin-bottom: 2.5rem;
}

.supp-section {
  scroll-margin-top: 2rem;
}

section h2 {
  font-size: 2rem;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--secondary-color);
  font-weight: 700;
}

.section-description {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 2rem;
  line-height: 1.8;
}

/* Teaser Section */
.teaser-section {
  text-align: center;
  padding: 1rem 1rem;
}

.teaser-video-container {
  max-width: 1000px;
  margin: 0 auto;

}

.teaser-video {
  width: 100%;
  border-radius: 10px;
  /* box-shadow: var(--shadow); */
  margin-bottom: 0.5rem;
}

.video-caption {
  font-size: 0.95rem;
  color: var(--text-light);
  font-style: italic;
  margin-top: 1rem;
}

/* Abstract Section */
.abstract-section {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.abstract-text {
  font-size: 1.1rem;
  line-height: 1.9;
  text-align: justify;
  color: var(--text-color);
}

/* Method Section */
.method-figure,
.dual-clock-figure {
  margin: 2rem 0;
  text-align: center;
}

.method-img,
.dual-clock-img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.dual-clock-video-container {
  max-width: 900px;
  margin: 0 auto;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.dual-clock-video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
  border-radius: 10px;
}

.figure-caption {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  text-align: left;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-light);
  border-left: 4px solid var(--secondary-color);
  border-radius: 5px;
}

.method-description,
.dual-clock-description {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-color);
  margin-top: 1.5rem;
}

/* Video Grids */
.video-grid-2col{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px; /* row/column gaps */
  align-items: start;
}


.video-item {
  background: var(--bg-light);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.video-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.video-item video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

.video-label {
    padding: 0.75rem 1rem;
    text-align: center;
    font-weight: 600;
    color: #ffffff;
    background: #34495e;
    font-size: 0.9rem;
}

/* Full-width Video Grid (for comparisons) */
.full-width-video-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
  background: var(--bg-light);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s ease;
}

.full-width-video-item:hover {
  box-shadow: var(--shadow-hover);
}

.full-width-video-item video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

/* Comparison Grid */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  row-gap: 5px;        /* was 2rem via gap */
  column-gap: 18px;    /* keep horizontal spacing */
  margin-top: 2rem;
}

.comparison-item {
  background: var(--bg-light);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.comparison-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.comparison-item video {
  width: 100%;
  height: auto;
  display: block;
  background: #000;
}

/* BibTeX Section */
.bibtex-section {
  background: #2d3748;
  color: white;
}

.bibtex-section h2 {
  color: white;
  border-bottom-color: var(--primary-color);
}

.bibtex {
  background: #1a202c;
  border-radius: 10px;
  padding: 1.5rem;
  overflow-x: auto;
  margin-top: 1rem;
}

.bibtex code {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: #e2e8f0;
}

/* Footer */
.page-footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 2px solid var(--border-color);
  color: var(--text-light);
}

.page-footer p {
  margin-bottom: 0.5rem;
}

.page-footer a {
  color: var(--primary-color);
  font-weight: 600;
}

/* Responsive Design */
@media (max-width: 968px) {
  .paper-title {
    font-size: 2rem;
  }

  .video-grid-2col,
  /* .comparison-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  } */

  .comparison-grid {
    grid-template-columns: repeat(2, minmax(320px, 1fr)) !important; /* Always keep 2 columns */
    gap: 1.5rem;
    overflow-x: auto;  /* Allow horizontal scrolling if needed */
  }
   
  section {
    padding: 1.5rem;
  }

  .paper-header {
    padding: 2rem 1rem;
  }
}

@media (max-width: 768px) {
  .page-container {
    padding: 1rem 0.5rem;
  }

  .paper-title {
    font-size: 1.75rem;
  }

  .paper-subtitle {
    font-size: 1.2rem;
  }

  .authors {
    font-size: 1rem;
    gap: 1rem;
  }

  section h2 {
    font-size: 1.5rem;
  }

  .paper-links {
    gap: 0.75rem;
  }

  .paper-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }

  .section-description,
  .abstract-text {
    font-size: 1rem;
  }

  .supp-nav {
    gap: 0.75rem;
  }

  .supp-nav a {
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
  }
}

@media (max-width: 480px) {
  .paper-title {
    font-size: 1.5rem;
  }

  .paper-subtitle {
    font-size: 1rem;
  }

  section {
    padding: 1rem;
    margin-bottom: 2rem;
  }

  section h2 {
    font-size: 1.3rem;
  }

  .authors {
    flex-direction: column;
    gap: 0.5rem;
  }

  .paper-links {
    flex-direction: column;
    gap: 0.5rem;
  }

  .paper-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Print Styles */
@media print {
  .paper-links,
  .supp-nav {
    display: none;
  }

  body {
    background: white;
  }

  .page-container {
    box-shadow: none;
  }

  section {
    box-shadow: none;
    page-break-inside: avoid;
  }
}

.video-grid-2col{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 18px;
  align-items: start;
}

/* Header bar with custom spacing pattern */
.video-col-headerbar{
  grid-column: 1 / -1;     /* span both columns */
  background: #34495e;     /* keep original box color */
  color: #ffffff;             /* black text */
  padding: 10px 20px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  white-space: nowrap;     /* keep on one line */
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.2;
}

/* Header cell (one per column) */
.video-col-headercell{
  background: #34495e;
  color: #ffffff;                 /* black text */
  padding: 10px 12px;          /* increase/decrease to change height */
  border-radius: 8px;
  display: flex;
  align-items: center;
  white-space: nowrap;         /* keep on one line */
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.2;
}

.video-col-headercell .spacer{ flex: 1 1 0; }
.video-col-headercell .label {
    display: block;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: #fff;
  }


/* Header cell (one per column) */
.video-col-headercell-small{
  background: #34495e;
  color: #ffffff;                 /* black text */
  padding: 10px 12px;          /* increase/decrease to change height */
  border-radius: 8px;
  display: flex;
  align-items: center;
  white-space: nowrap;         /* keep on one line */
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1.2;
}

.video-col-headercell-small .spacer{ flex: 1 1 0; }
.video-col-headercell-small .label { flex: 0 0 auto; }

.video-col-headerbar .spacer{ flex: 1 1 0; }  /* each 'space' */
.video-col-headerbar .label{ flex: 0 0 auto; }/* the words */

/* Hide old per-item labels if they exist */
.video-item .video-label{ display:none; }


/* Optional: nicer mobile fallback — when it collapses to 1 column,
   hide the global headers and show a small inline label per video. */
@media (max-width: 800px){
  .video-grid-2col{ 
    grid-template-columns: 1fr !important;  /* Always collapse to 1 column */
  }
  
  .video-col-headercell {
    display: flex;
    justify-content: space-between;  /* Spread titles across a single row */
    align-items: center;
  }
  
  /* Hide extra header columns */
  .video-col-headercell:nth-child(n+2) {
    display: none; /* Hide headers like "Ours (Wan2.2)", "Ours (CogVideoX)", etc. */
  }

  /* Adjust the global header row */
  .video-col-header {
    display: none; /* Hide any global header if needed */
  }

  /* Style for header label */
  .video-col-headercell .label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #fff;
  }

  /* Show inline labels for video items */
  .video-item::before{
    content: attr(data-col);
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: #fff;
    opacity: 0.85;
    margin-bottom: 6px;
  }

  .comparison-grid {
    grid-template-columns: 1fr !important;  /* Collapse to 1 column on small screens */
    gap: 1.5rem;   /* Adjust the gap between rows */
    overflow-x: auto;  /* Allow horizontal scrolling if needed */
  }
  .video-col-headercell-small {
    display: flex;
    justify-content: space-between;  /* Spread titles across a single row */
    align-items: center;
  }
  .video-col-headercell-small .label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #fff;
  }
  .comparison-grid .video-col-headercell:nth-child(n+2) {
    display: none;
  }
  /* Show the first header only (Warped, Ours, etc.) */
  .comparison-grid .video-col-headercell:first-of-type {
    display: block; /* Show only the first header */
  }
  .comparison-grid .video-col-headercell-small:not(:first-of-type),
  .comparison-grid .video-col-headercell:not(:first-of-type){
    display: none !important;
  }
}

.paper-header + .teaser-section { margin-top: -2em; }