/* ============================================
   NeRF-UAVeL Project Page - VGGT-style
   Clean, minimal, white background, no navbar
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans', sans-serif;
  font-size: 1.05rem;
  line-height: 1.7;
  color: #333;
  background: #fff;
}

a {
  color: #4A90D9;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- Layout --- */
.section {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* --- Title Section --- */
.title-section {
  text-align: center;
  padding-top: 4rem;
  padding-bottom: 1.5rem;
}

.project-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  color: #222;
  margin-bottom: 1.2rem;
}

.project-title .accent {
  color: #4A90D9;
}

.authors {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.authors a {
  font-weight: 500;
  color: #4A90D9;
}

.affiliations {
  font-size: 0.9rem;
  color: #777;
  margin-bottom: 0.6rem;
}

.affiliations span {
  margin: 0 0.5rem;
  white-space: nowrap;
}

.venue {
  margin-bottom: 1.4rem;
}

.venue-badge {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  color: #555;
  background: #f0f0f0;
  padding: 0.3rem 1rem;
  border-radius: 20px;
}

/* --- Buttons --- */
.buttons-row {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.3rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: #333;
  background: #fff;
  border: 1.5px solid #d0d0d0;
  border-radius: 8px;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.btn:hover {
  border-color: #4A90D9;
  background: #f7faff;
  text-decoration: none;
}

.btn-disabled {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

.btn-note {
  font-size: 0.78rem;
  color: #999;
  font-weight: 400;
}

/* --- Section Headings --- */
h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: #222;
  margin-bottom: 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid #eee;
}

h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #333;
  margin-top: 1.8rem;
  margin-bottom: 0.8rem;
}

/* --- Abstract --- */
.abstract-text {
  text-align: justify;
  hyphens: auto;
}

/* --- Image Placeholders --- */
.image-placeholder {
  width: 100%;
  min-height: 300px;
  background: #f5f5f5;
  border: 2px dashed #ccc;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1rem 0 0.5rem;
}

.image-placeholder span {
  font-size: 1rem;
  color: #999;
  font-weight: 500;
}

.caption {
  font-size: 0.92rem;
  color: #666;
  text-align: center;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.video-container {
  max-width: 100%;
  margin: 0 auto 0.5rem;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.video-container video {
  display: block;
  width: 100%;
  height: auto;
}

/* --- Module List --- */
.module-list {
  margin-top: 1.2rem;
}

.module-list p {
  margin-bottom: 0.7rem;
  padding-left: 0.5rem;
  border-left: 3px solid #4A90D9;
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
}

/* --- Results Table --- */
.table-wrapper {
  overflow-x: auto;
  margin: 1rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: center;
}

thead th {
  background: #f5f5f5;
  font-weight: 600;
  padding: 0.6rem 0.7rem;
  border: 1px solid #ddd;
  color: #333;
}

tbody td {
  padding: 0.5rem 0.7rem;
  border: 1px solid #e0e0e0;
}

tbody tr:hover {
  background: #fafafa;
}

.ours-row {
  background: #e8f0fe;
}

.ours-row:hover {
  background: #dce7fa;
}

.section-divider td {
  padding: 0;
  height: 2px;
  background: #ddd;
  border: none;
}

.table-note {
  font-size: 0.92rem;
  color: #666;
  text-align: center;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.table-footnote {
  font-size: 0.85rem;
  color: #888;
  margin-top: 0.5rem;
  text-align: left;
  font-style: italic;
}

/* --- BibTeX --- */
.bibtex-block {
  position: relative;
  background: #1e1e1e;
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  margin: 0.5rem 0;
}

.bibtex-block pre {
  margin: 0;
  overflow-x: auto;
}

.bibtex-block code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  color: #d4d4d4;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  background: #333;
  color: #ccc;
  border: 1px solid #555;
  border-radius: 5px;
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: 'Noto Sans', sans-serif;
  transition: background 0.15s;
}

.copy-btn:hover {
  background: #444;
  color: #fff;
}

/* --- Footer --- */
.footer {
  max-width: 900px;
  margin: 2rem auto 0;
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: #999;
  border-top: 1px solid #eee;
}

.footer a {
  color: #777;
}

.footer a:hover {
  color: #4A90D9;
}

/* --- Responsive --- */
@media (max-width: 700px) {
  .project-title {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  .section {
    padding: 1.5rem 1rem;
  }

  .title-section {
    padding-top: 2.5rem;
  }

  .image-placeholder {
    min-height: 180px;
  }

  table {
    font-size: 0.82rem;
  }

  thead th, tbody td {
    padding: 0.4rem 0.35rem;
  }

  .buttons-row {
    gap: 0.5rem;
  }

  .btn {
    padding: 0.45rem 0.9rem;
    font-size: 0.88rem;
  }
}