:root {
  --max-width: 1100px;
  --text-primary: #1a1d29;
  --text-secondary: #4a4d5c;
  --background: #fafbfc;
  --surface: #ffffff;
  --border: #e2e6ec;
  --accent: #0d47a1;
  --accent-hover: #1565c0;
  --accent-muted: #e3f2fd;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Full viewport background so no harsh strip on wide monitors */
html {
  background-color: var(--background);
  min-height: 100%;
}

/* Global */
body {
  font-family: var(--sans);
  background-color: transparent;
  color: var(--text-primary);
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 2rem 1.5rem 4rem;
  line-height: 1.65;
  font-size: 1rem;
  font-weight: 400;
}

/* Page header */
.page-header {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
  margin-bottom: 0.25rem;
}

.venue-badge {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-muted);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.title {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4.2vw, 2.6rem);
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin: 0 0 1.25rem;
  max-width: 32em;
  margin-left: auto;
  margin-right: auto;
}

/* Authors & affiliations */
.authors,
.affiliations,
.links {
  text-align: center;
}

.authors {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.authors a,
.affiliations a {
  color: var(--text-primary);
  text-decoration: none;
  margin: 0 0.35rem;
  font-weight: 500;
}

.authors a:hover,
.affiliations a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.affiliations {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.affiliations a {
  color: var(--text-secondary);
}

.authors p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Link buttons */
.links {
  margin: 1rem 0 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
}

.link-block {
  display: inline-block;
}

.external-link.button {
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  background: var(--surface);
  color: var(--accent);
  border: 1.5px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.external-link.button:hover {
  background: var(--accent);
  color: var(--surface);
  border-color: var(--accent);
  text-decoration: none;
}

.external-link.button .icon {
  margin-right: 0.4rem;
}

/* Sections */
.section {
  margin: 0 auto;
  max-width: var(--max-width);
  padding: 2rem 0;
}

.section h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.content-section h2 {
  margin-top: 0.5rem;
}

/* Teaser */
.teaser {
  text-align: center;
  padding: 0.5rem 0 1.5rem;
}

.teaser-image-wrap {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  margin-bottom: 1rem;
  background: var(--surface);
}

.teaser-image-wrap img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: top;
}

.teaser-caption {
  max-width: 36em;
  margin: 0 auto;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Abstract */
.abstract {
  max-width: 720px;
  margin: 2rem auto 2.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  border-radius: 8px;
  border-left: 4px solid var(--accent);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.abstract h2 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  padding: 0;
  border: none;
  text-align: left;
}

.abstract p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-primary);
  text-align: justify;
}

/* Scene tabs (Real-world / Synthetic) */
.scene-tabs {
  border: none;
  background: var(--surface);
  border-radius: 8px;
  padding: 0.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.scene-tabs .nav-item {
  border: none;
  border-radius: 6px;
  margin: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.scene-tabs .nav-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}

.scene-tabs .nav-link:hover {
  background: var(--accent-muted);
  color: var(--accent);
}

.scene-tabs .nav-link.active {
  background: var(--accent);
  color: var(--surface);
}

.nav a {
  color: inherit;
  text-decoration: none;
}

.nav a:hover {
  color: inherit;
  text-decoration: none;
}

/* Ratio slider row */
.section .d-flex {
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding: 0.25rem 0 0.5rem;
}

.section .d-flex label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 0;
}

.compression-ratio-slider {
  flex: 1 1 auto;
  min-width: 0;
  cursor: pointer;
  background: transparent;
  -webkit-appearance: none;
  appearance: none;
}

.compression-ratio-slider:focus {
  outline: none;
}

/* Slider track */
.compression-ratio-slider::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 999px;
  background: var(--border);
}

.compression-ratio-slider::-moz-range-track {
  height: 3px;
  border-radius: 999px;
  background: var(--border);
}

/* Slider thumb */
.compression-ratio-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--surface);
  background-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(13, 71, 161, 0.16);
  margin-top: -6px; /* center on 3px track */
  cursor: pointer;
}

.compression-ratio-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--surface);
  background-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(13, 71, 161, 0.16);
  cursor: pointer;
}

.compression-ratio-slider:hover::-webkit-slider-thumb,
.compression-ratio-slider:hover::-moz-range-thumb {
  background-color: var(--accent-hover);
}

.compression-ratio-label {
  font-size: 0.95rem;
  color: var(--text-primary);
}

/* Comparison / GT images */
.compression-gt-only img {
  max-width: 100%;
  height: 100%;
  display: block;
  border-radius: 6px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  object-fit: contain;
}

/* References */
.references-section h2 {
  text-align: left;
  border-bottom: none;
  margin-bottom: 1rem;
}

.references-list {
  margin: 0;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.references-list a {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
}

.references-list a:hover {
  text-decoration: underline;
}

/* Headings reset (Bootstrap override) */
h1, h2, h3, h4, h5, h6 {
  font-weight: inherit;
}

/* Code (if used) */
code, pre {
  background-color: var(--accent-muted);
  padding: 0.2em 0.45em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: ui-monospace, monospace;
}

/* DICS comparison slider text */
.b-dics__text {
  background: var(--surface) !important;
  color: var(--text-primary) !important;
  font-family: var(--sans) !important;
  font-size: 0.85rem !important;
  font-weight: 500;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.1);
  border-radius: 4px;
}