/* ============================================================
   Shared structural layer for the redesigned ADGS page.
   All colors/fonts/shadows come from CSS variables defined per
   theme file (theme-academic.css / theme-bold.css / theme-dark.css),
   loaded after this file. This file only handles layout/structure
   so the three themes stay visually consistent in spacing/rhythm.
   ============================================================ */

:root {
  --radius: 14px;
  --gap: 1.5rem;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

/* Match the width used on the AD-GS gallery carousel page so both
   pages read at the same scale. */
@media screen and (min-width: 1024px) {
  .container.is-max-desktop {
    max-width: 1320px !important;
  }
}

/* Bulma's .hero uses align-items on its flex container, which makes
   the .container child shrink-to-fit its content instead of
   stretching to max-width. Forcing width: 100% restores the normal
   "fill up to max-width" sizing (this mainly affected the teaser
   section, which has no other content dictating a wider intrinsic
   size for the flex item). */
.hero .container.is-max-desktop {
  width: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

/* ---------- Top nav ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  padding: 0.9rem 1.5rem;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-card-border);
}

.site-nav-brand {
  color: var(--nav-text) !important;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.85;
  transition: opacity var(--transition);
}

.site-nav-brand:hover {
  opacity: 1;
}

/* ---------- Hero ---------- */
section.hero {
  background: var(--hero-bg);
}

section.hero .publication-title {
  color: var(--color-heading);
  font-weight: 800;
  letter-spacing: -0.01em;
}

section.hero .publication-authors a {
  color: var(--color-accent) !important;
}

.conference-info {
  background: var(--accent-badge-bg) !important;
  color: var(--accent-badge-text) !important;
  box-shadow: none !important;
}

/* Hero action buttons */
.hero .link-block .button {
  background: var(--button-bg) !important;
  color: var(--button-text) !important;
  border: 1px solid var(--button-border) !important;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
}

.hero .link-block .button:hover {
  background: var(--button-hover-bg) !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--shadow-color);
}

.teaser h2.subtitle {
  color: var(--color-text-soft);
  font-weight: 500;
  margin-top: 1.5rem;
}

/* Callout pointing to the full comparison gallery, placed early so
   visitors skimming the top of the page don't miss it (previously
   the only links were an ambiguously-labeled hero button and a note
   buried after all the comparison videos). */
.gallery-callout {
  text-align: center;
  margin-top: 1.25rem;
}

.gallery-callout a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-card-border);
  color: var(--color-accent) !important;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.gallery-callout a:hover {
  background: var(--color-accent);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--shadow-color);
}

.gallery-callout-arrow {
  transition: transform var(--transition);
}

.gallery-callout a:hover .gallery-callout-arrow {
  transform: translateX(3px);
}

.teaser-videos video {
  box-shadow: 0 10px 30px var(--shadow-color);
}

/* Click-anywhere-to-pause wrapper, shared by teaser and comparison
   videos (matches the gallery carousel's video interaction). */
.video-click-wrap {
  position: relative;
  cursor: pointer;
  overflow: hidden;
  border-radius: 6px;
}

/* These source clips have a burned-in black label strip along the
   bottom edge (baked into the video pixels, not something we can
   trim losslessly without re-encoding). We crop it visually here:
   the wrapper is given the cropped aspect ratio, and the video fills
   it with object-fit: cover anchored to the top, pushing the bottom
   strip out of view. Ratio is per-video since each clip's strip is a
   different fraction of its frame height. */
.video-click-wrap video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

/* Labels under each video echoing its 3-panel layout (Ground Truth /
   Method / AD-GS), each centered within its own third of the width. */
.panel-labels {
  display: flex;
  margin-top: 0.6rem;
}

.panel-labels span {
  flex: 1 1 0;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 0.02em;
}

.video-click-wrap:has(#teaser1) { aspect-ratio: 5.4545; }
.video-click-wrap:has(#teaser2) { aspect-ratio: 4.588; }
.video-click-wrap:has(#teaser3) { aspect-ratio: 4.072; }
.video-click-wrap:has(#dollyzoom) { aspect-ratio: 4.072; }
.video-click-wrap:has(#dollyzoom2) { aspect-ratio: 4.072; }
.video-click-wrap:has(#dollyzoom3) { aspect-ratio: 4.072; }
.video-click-wrap:has(#dollyzoom4) { aspect-ratio: 4.588; }

/* Method badge: the "3DGS vs AD-GS" style comparison headings
   become colored pills instead of plain text, matching the
   gallery carousel's caption badge. */
h3.title.is-4.method-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff !important;
  padding: 0.4rem 1.2rem;
  border-radius: 999px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

/* Scene/views metadata line under comparison videos, matching the
   gallery carousel's caption style. */
.video-meta {
  margin-top: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.video-meta-scene {
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-heading);
}

.video-meta-views {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--color-card-border);
  color: var(--color-text-soft);
  font-size: 1rem;
  font-weight: 600;
  white-space: nowrap;
}

.video-meta-badge {
  display: inline-block;
  padding: 0.3rem 1rem;
  border-radius: 999px;
  background: var(--color-accent);
  color: #fff;
  font-family: 'Google Sans', 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  word-break: keep-all;
}

/* Teaser captions: badge + scene + views together in one card,
   read as a single line on wider screens. */
.teaser-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.video-meta-inline {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-card-border);
  border-radius: 12px;
  padding: 0.75rem 1.25rem;
  flex-wrap: nowrap;
  overflow-x: auto;
}

@media (max-width: 640px) {
  .video-meta-inline {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

/* ---------- Section rhythm ---------- */
section.section {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

section.section:nth-of-type(even) {
  background: var(--color-bg-alt);
}

/* Eyebrow kicker label above each major section heading */
.eyebrow {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.title.is-3 {
  color: var(--color-heading) !important;
  font-weight: 700 !important;
}

.title.is-4 {
  color: var(--color-heading) !important;
  font-weight: 600 !important;
}

.content p,
.content li {
  color: var(--color-text) !important;
}

/* ---------- Card treatment for figures / videos ---------- */
.content:has(> video),
.content:has(> img) {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 4px 18px var(--shadow-color);
}

.content:has(> video) video,
.content:has(> img) img {
  border-radius: calc(var(--radius) - 6px);
}

/* Comparison rows (3DGS vs AD-GS, etc.) */
.columns.is-centered > .column > .content:has(video) {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 4px 18px var(--shadow-color);
}

.columns.is-centered > .column > .content:has(video) video {
  border-radius: calc(var(--radius) - 6px);
  margin-top: 0.75rem;
}

/* Interpolation panel */
.interpolation-panel {
  background: var(--color-card-bg) !important;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 4px 18px var(--shadow-color);
}

/* Minor housekeeping notes (links to more results, funding
   acknowledgement) don't deserve full section-header treatment;
   keep them quiet and compact instead of shouting like Abstract/
   Observations do. */
.meta-note {
  text-align: center;
  color: var(--color-text-soft);
  font-size: 1.15rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-card-border);
}

.meta-note p {
  color: var(--color-text-soft) !important;
  margin-bottom: 0.4rem;
}

.meta-note a {
  color: var(--color-accent) !important;
}

/* Citation gets a real card: heading + intro + code block
   together, instead of the code block floating in its own box
   below a loose heading. */
.citation-section {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 4px 18px var(--shadow-color);
  margin-top: 1rem;
}

/* Citation code block */
pre {
  background: var(--code-bg) !important;
  color: var(--code-text) !important;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem !important;
}

.citation-section pre {
  box-shadow: none;
  margin-top: 1rem;
}

pre code {
  color: inherit !important;
  background: transparent !important;
}

/* ---------- Footer ---------- */
footer.footer {
  background: var(--footer-bg) !important;
  color: var(--footer-text);
  border-top: 1px solid var(--color-card-border);
}

footer.footer a {
  color: var(--color-accent) !important;
}

footer .icon-link {
  color: var(--footer-text) !important;
}