/* Layout follows pixeldit.github.io; palette uses UNC Charlotte green & gold. */
:root {
  --accent: #00703c;
  --accent-dark: #005035;
  --accent-soft: #eaf5ee;
  --gold: #b9a66b;
  --primary-gradient: linear-gradient(135deg, #00873f 0%, #005035 100%);
  --page-bg: #fcfcfc;
  --ink: #1a1a1a;
}

body {
  font-family: 'Noto Sans', sans-serif;
  background-color: var(--page-bg);
  color: #333;
}
.title, .subtitle { font-family: 'Google Sans', 'Noto Sans', sans-serif; }
.accent { color: var(--accent) !important; }
.gold { color: var(--gold) !important; }
.pixelated { image-rendering: pixelated; }
img { display: block; }

/* ---------------- Hero ---------------- */
.hero-fancy {
  background: #fff;
  padding: 1rem 0;
  color: var(--ink);
  overflow: hidden;
}
.venue-pill {
  display: inline-block;
  margin-bottom: 1.2rem;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}
.publication-title-fancy {
  font-weight: 500;
  font-size: 2.5rem;
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: 1.5rem !important;
  letter-spacing: -0.03em;
}
.publication-title-fancy .highlight-green {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  display: inline-block;
  font-size: 3.5rem;
  font-weight: 700;
}
.abbr-highlight {
  color: var(--accent);
  border-bottom: 2px solid rgba(0, 112, 60, 0.5);
}
.authors-fancy {
  font-family: 'Google Sans', sans-serif;
  font-size: 1.25rem;
  margin-bottom: 0.8rem;
}
.author-block { margin: 0 4px; }
.author-link {
  color: #2a2a2a;
  border-bottom: 1px solid rgba(0, 112, 60, 0.3);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.author-link:hover { color: var(--accent); border-color: var(--accent); }
.affiliations-fancy {
  color: #666;
  font-size: 1.15rem;
  margin-bottom: 2rem;
  font-weight: 300;
}
.aff-link { color: var(--accent); font-weight: 500; border-bottom: 1px solid rgba(0, 112, 60, 0.3); }
.aff-link:hover { color: var(--accent-dark); border-color: var(--accent-dark); }
.btn-fancy-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-top: 20px;
}
.btn-fancy {
  background: var(--ink);
  border: 1px solid var(--ink);
  color: #fff !important;
  padding: 12px 28px;
  border-radius: 30px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-fancy:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 112, 60, 0.3);
}
.btn-fancy .icon { margin-right: 10px; }

/* Marquee of OBS-Diff | Ours pairs */
.hero-teaser-marquee {
  width: 100%;
  margin-top: 2.5rem;
  overflow: hidden;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 35px 70px rgba(15, 23, 42, 0.18);
  padding: 1.8rem 0;
}
.hero-teaser-track {
  display: flex;
  width: max-content;
  will-change: transform;
}
.hero-teaser-strip { display: flex; gap: 22px; padding-right: 22px; }
.pair-tile {
  position: relative;
  display: flex;
  height: 320px;
  border-radius: 22px;
  overflow: hidden;
  flex: 0 0 auto;
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.25);
  background: #010409;
}
.pair-tile img { height: 100%; width: 320px; object-fit: cover; }
.pair-tile img + img { border-left: 3px solid #fff; }
.pair-tile .tag-l, .pair-tile .tag-r, .pair-tile .tag-sp {
  position: absolute;
  bottom: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
}
.pair-tile .tag-l { left: 8px; background: rgba(0, 0, 0, 0.6); }
.pair-tile .tag-r { right: 8px; background: var(--accent); }
.pair-tile .tag-sp { top: 8px; bottom: auto; left: 50%; transform: translateX(-50%); background: rgba(0, 0, 0, 0.6); }
.marquee-caption { margin-top: 0.8rem; font-size: 0.85rem; color: #777; text-align: center; }
.hero-fancy .hero-body { padding-left: 0; padding-right: 0; }

@media (prefers-reduced-motion: reduce) {
  .hero-teaser-marquee { overflow-x: auto; }
}

/* ---------------- Full-width bands (as in the PixelDiT template) ---------------- */
.band { padding: 4rem 1.5rem; }
.band-white { background: #fff; }
.band-tint {
  background: radial-gradient(circle at 20% 20%, #f0faf3 0%, #f8fcf9 45%, #e6f3ea 100%);
  border-top: 1px solid #dcebe1;
  border-bottom: 1px solid #d3e6da;
}
/* Gallery: tinted at the top, fading to white so it blends into the BibTeX band below */
.band-fade {
  background: linear-gradient(180deg, #e9f4ed 0%, #f4faf6 45%, #fff 100%);
  border-top: 1px solid #dcebe1;
}
.band-gray { background: #f7f8f7; border-top: 1px solid #eceeed; border-bottom: 1px solid #eceeed; }
.band .content,
.band .method-intro { max-width: 860px; margin-left: auto; margin-right: auto; }
.method-title { margin-top: 3.5rem; }
#perf .tabs, #perf .tab-content, #perf .container > p { max-width: 900px; margin-left: auto; margin-right: auto; }
#perf .tabs { margin-bottom: 1.5rem; }

/* Gallery is the only boxed section */
.section-card {
  background: #fff;
  border-radius: 20px;
  border: 1px solid #e6ece8;
  box-shadow: 0 24px 60px rgba(25, 35, 60, 0.08);
  padding: 2.8rem 3rem;
}

/* ---------------- Key idea: "versus" layout ---------------- */
.idea-lead { max-width: 760px; margin: 0 auto 2.2rem; text-align: center; color: #555; font-size: 1.05rem; }
.versus {
  display: grid;
  grid-template-columns: 1fr 180px 1fr;
  gap: 18px;
  align-items: center;
}
.vs-side {
  border-radius: 16px;
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.vs-base { background: #f4f4f5; border: 1px dashed #c9c9cf; }
.vs-ours { background: #fff; border: 2px solid var(--accent); box-shadow: 0 14px 30px rgba(0, 80, 53, 0.12); }
.vs-tag { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: #666; }
.vs-ours .vs-tag { color: var(--accent); }
.vs-eq { font-size: 0.95rem; color: #333; }
.vs-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.vs-imgs figure, .vs-center figure { margin: 0; }
.vs-imgs img, .vs-center img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; }
.vs-base .vs-imgs img { filter: saturate(0.85); }
.vs-imgs figcaption, .vs-center figcaption { font-size: 0.75rem; color: #777; text-align: center; margin-top: 3px; }
.vs-note { font-size: 0.88rem; font-weight: 600; }
.vs-base .vs-note { color: #b91c1c; }
.vs-ours .vs-note { color: var(--accent); }
.vs-center {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
}
.vs-arrow { text-align: center; color: var(--accent); font-size: 1.1rem; }
.idea-pills { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 2rem; }
.idea-pills span {
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.9rem;
  font-weight: 600;
}
.idea-pills i { margin-right: 6px; }

.box-fancy {
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border: 1px solid #f0f0f0;
  padding: 1.5rem;
  background: #fff;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  height: 100%;
}
.box-fancy::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary-gradient);
}
.box-fancy:hover { transform: translateY(-5px); box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1); }
.box-fancy img { border-radius: 8px; }

/* ---------------- Method ---------------- */
.method-intro { max-width: 860px; margin: 0 auto 1.5rem; }
.method-steps { margin-bottom: 1.5rem; }
.step-card .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  margin-bottom: 0.6rem;
}
.step-card .eq { overflow-x: auto; overflow-y: hidden; margin: 0.4rem 0; }

/* ---------------- Performance ---------------- */
.perf-tabs.tabs.is-toggle a { color: var(--accent); border-color: var(--accent); }
.perf-tabs.tabs.is-toggle a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.perf-tabs.tabs.is-toggle li.is-active a { background: var(--accent); border-color: var(--accent); color: #fff; }

.table-container { overflow-x: auto; }
.fancy-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.9rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid #eee;
  text-align: center;
}
.fancy-table th {
  background: #fafafa;
  color: #444;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 16px;
  border-bottom: 2px solid #eee;
  font-size: 0.8rem;
  text-align: center;
}
.fancy-table td { padding: 10px 16px; border-bottom: 1px solid #f0f0f0; color: #666; vertical-align: middle; }
.fancy-table td[rowspan] { font-weight: 700; color: #333; border-right: 1px solid #f0f0f0; }
.fancy-table .dense-row td { color: #999; font-style: italic; }
.fancy-table .highlight-row { background: #f5fbf7; }
.fancy-table .highlight-row td { color: #222; font-weight: 600; }
.best-val { color: var(--accent) !important; font-weight: 700 !important; }
.metric-label { font-size: 0.75em; color: #888; }

/* ---------------- Dark band: importance-signal application ---------------- */
.dark-band {
  background: linear-gradient(135deg, #0d1a13 0%, #13261c 100%);
  color: #d6e2da;
}
.band-kicker { text-align: center; color: var(--gold); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 0.6rem; }
.band-lead { max-width: 760px; margin: 0 auto 2rem; text-align: center; color: #b9ccc0; font-size: 1.05rem; }
.band-flow {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 2.2rem;
  counter-reset: none;
}
.band-flow li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  font-size: 0.92rem;
}
.band-flow li > span {
  flex: 0 0 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gold);
  color: #13261c;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.band-flow b { color: #fff; }

.signal-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 1.2rem; }
.sig-btn {
  text-align: left;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  padding: 0.9rem 1rem;
  color: #d6e2da;
  font: inherit;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.sig-btn:hover { border-color: rgba(185, 166, 107, 0.6); transform: translateY(-2px); }
.sig-btn.is-active { background: rgba(185, 166, 107, 0.12); border-color: var(--gold); }
.sig-name { font-family: 'Google Sans', sans-serif; font-size: 1.1rem; font-weight: 700; color: #fff; }
.sig-how { font-size: 0.8rem; color: #9fb8a8; }
.sig-keeps { font-size: 0.85rem; font-weight: 600; color: var(--gold); }
.sig-keeps i { margin-right: 4px; }

.signal-viewer {
  background: #fff;
  color: #333;
  border-radius: 18px;
  padding: 1.3rem;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.35);
}
.sv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.sv-grid figure { margin: 0; }
.sv-grid img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 10px; }
.sv-grid figcaption { text-align: center; font-size: 0.8rem; font-weight: 600; color: #555; margin-top: 4px; }
.sv-ours img { outline: 3px solid var(--accent); outline-offset: 2px; }
.sv-ours figcaption { color: var(--accent); }
.sv-prompt { text-align: center; font-style: italic; font-size: 0.85rem; color: #666; margin-top: 0.5rem; }
.sv-insight {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1.2rem;
  align-items: center;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #eee;
}
.sv-insight > p { font-size: 0.95rem; }
.sv-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.sv-metric { background: var(--accent-soft); border-radius: 10px; padding: 8px; text-align: center; display: flex; flex-direction: column; }
.svm-name { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; color: #666; }
.svm-val { font-size: 0.85rem; color: #444; }
.svm-val i { font-size: 0.7rem; color: #999; }
.svm-delta { font-weight: 700; color: var(--accent); }
.svm-note { grid-column: 1 / -1; font-size: 0.72rem; color: #888; text-align: center; }
.band-foot { max-width: 780px; margin: 1.8rem auto 0; text-align: center; font-size: 0.95rem; color: #b9ccc0; }
.band-foot b { color: #fff; }
.band-link { color: var(--gold); text-decoration: underline; }

/* ---------------- Gallery ---------------- */
.gallery-label {
  font-family: 'Google Sans', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent-dark);
  margin: 2rem 0 0.8rem;
  padding-left: 10px;
  border-left: 4px solid var(--accent);
}
.gallery-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.gallery-card {
  position: relative;
  margin: 0;
  cursor: pointer;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-card:hover { transform: scale(1.03); box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18); }
.gallery-card img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.gallery-card figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 18px 10px 8px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
  color: #fff;
  font-size: 0.75rem;
  line-height: 1.3;
  opacity: 0;
  transition: opacity 0.2s;
}
.gallery-card:hover figcaption, .gallery-card:focus figcaption { opacity: 1; }
.gallery-card .sp-badge {
  position: absolute;
  top: 8px; right: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}
.gallery-card .sp-badge.is-gold { background: var(--gold); color: #13261c; }

.gallery-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(5, 10, 8, 0.82);
  padding: 20px;
}
.gallery-modal.is-active { display: flex; }
.gallery-modal__content {
  position: relative;
  background: #fff;
  border-radius: 16px;
  padding: 1.8rem;
  max-width: 1100px;
  width: 100%;
  max-height: 92vh;
  overflow-y: auto;
}
.gallery-modal__close {
  position: absolute;
  top: 10px; right: 14px;
  border: none;
  background: none;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  color: #666;
}
.gallery-modal__meta { font-size: 0.8rem; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }
.gallery-modal__prompt { font-style: italic; margin: 0.3rem 0 1rem; color: #333; }
.gallery-modal__grid { display: grid; gap: 8px; align-items: center; }
.gallery-modal__grid img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 8px; }
.gm-col { text-align: center; font-weight: 700; font-size: 0.85rem; color: #444; }
.gm-col.accent { color: var(--accent); }
.gm-row { writing-mode: vertical-rl; transform: rotate(180deg); font-weight: 700; font-size: 0.85rem; color: #444; }
.gm-row.accent { color: var(--accent); }
.gm-dense { grid-row: span 2; }
.gm-dense img { border: 2px solid #ddd; }
.gm-dense p { text-align: center; font-size: 0.8rem; color: #888; margin-top: 4px; }

/* ---------------- BibTeX / footer ---------------- */
#BibTeX pre { background: #f5f5f5; border-radius: 8px; font-size: 0.85rem; }
.footer { background: #fafafa; padding: 2rem 1.5rem; }

/* ---------------- Responsive ---------------- */
@media screen and (max-width: 768px) {
  .publication-title-fancy { font-size: 1.8rem; }
  .publication-title-fancy .highlight-green { font-size: 2.4rem; }
  .pair-tile { height: 190px; }
  .pair-tile img { width: 190px; }
  .band { padding: 2.5rem 1rem; }
  .section-card { padding: 1.5rem 1.1rem; border-radius: 16px; }
  .versus { grid-template-columns: 1fr; }
  .vs-center { flex-direction: row; align-items: center; }
  .vs-center figure { flex: 1; }
  .vs-arrow i { transform: rotate(-90deg); }
  .band-flow, .signal-picker, .sv-insight { grid-template-columns: 1fr; }
  .sv-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-row { grid-template-columns: repeat(2, 1fr); }
}