/* ── Fonts ── */
:root {
  --paper-primary: #73A4C6; /* QGFBlue / ourblue in paper/ */
  --paper-primary-dark: #5a91b4;
}

body {
  font-family: 'Noto Sans', sans-serif;
}

/* ── Publication hero ── */
.publication-title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 2.3rem !important;
  line-height: 1.25 !important;
}

.publication-authors {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
}

.author-block {
  margin-right: 4px;
}

.publication-links .link-block {
  margin: 4px;
}

/* ── Teaser ── */
.teaser .hero-body {
  padding-top: 0;
  padding-bottom: 3rem;
}

/* ── TL;DR ── */
h2.title.tldr-heading,
.section-heading.tldr-heading {
  text-align: center;
  color: var(--paper-primary) !important;
}

.tldr-box {
  background: #eef4f9;
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.tldr-box .tldr-heading {
  margin-bottom: 0.75rem;
}

.tldr-box p {
  margin: 0;
}

.tldr-box strong {
  color: var(--paper-primary-dark);
}

.content strong {
  color: var(--paper-primary-dark);
}

/* ── Section headings ── */
.section-heading {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

/* ── Figure captions ── */
.fig-caption {
  font-size: 0.92rem;
  color: #555;
  line-height: 1.55;
  margin-top: 0.75rem;
  text-align: left;
}
.fig-caption strong {
  color: #222;
}

/* ── Algorithm box ── */
.algo-box {
  background: #f8f9fa;
  border: 1px solid #dbdbdb;
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  font-family: 'Courier New', 'Lucida Console', monospace;
  font-size: 0.9rem;
  line-height: 1.75;
  overflow-x: auto;
}
.algo-box .algo-title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: #363636;
  margin-bottom: 0.6rem;
  border-bottom: 1px solid #dbdbdb;
  padding-bottom: 0.4rem;
}
.algo-box .comment {
  color: var(--paper-primary);
  font-weight: 600;
}

/* ── BibTeX ── */
.bibtex-code {
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  font-family: 'Courier New', monospace;
  font-size: 0.88rem;
  line-height: 1.65;
  white-space: pre;
  overflow-x: auto;
}

/* ── Key insight box ── */
.insight-box {
  background: #fff8e6;
  border: 1px solid #f5c842;
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  font-size: 0.97rem;
  line-height: 1.65;
}

/* ── Gradient method boxes (Problems / Method sections) ── */
.method-box {
  border-radius: 12px;
  padding: 1.5rem 1.75rem;
  font-size: 1rem;
  line-height: 1.7;
  margin: 1.75rem 0;
  border: 1px solid transparent;
}
.method-box.negative-red    { background: #f7e9e9; border-color: #e8c4c4; }
.method-box.negative-orange { background: #faeedf; border-color: #e8d0ad; }
.method-box.positive-green  { background: #e6f5eb; border-color: #b8ddc4; }

.method-box .box-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.method-box.negative-red    .box-title { color: #c0392b; }
.method-box.negative-orange .box-title { color: #c0660a; }
.method-box.positive-green  .box-title { color: #1e8449; }

.method-box p { margin-bottom: 0.75rem; }
.method-box p:last-child { margin-bottom: 0; }

.method-box .insight-box {
  background: rgba(255,255,255,0.6);
  border-color: rgba(0,0,0,0.1);
  margin-top: 0.75rem;
  margin-bottom: 0;
}

/* ── Equation-like display ── */
.eq-block {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  padding: 0.75rem 1.25rem;
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  text-align: center;
  margin: 1rem 0;
}

/* ── Two-column figure grid ── */
.fig-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.fig-three-col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
/* Asymmetric grid (e.g. 1.8fr 1fr) — collapses to single column on mobile */
.fig-asym-col {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 2rem;
  align-items: start;
}

/* KaTeX display equations: scroll horizontally on small screens */
.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
}

@media (max-width: 768px) {
  .fig-two-col, .fig-three-col, .fig-asym-col { grid-template-columns: 1fr; }
  .publication-title { font-size: 1.5rem !important; }
  .section-heading { font-size: 1.4rem; }
  /* Tighten section padding on small screens */
  .section { padding: 2rem 1rem; }
  /* Tighten method/insight boxes */
  .tldr-box,
  .method-box { padding: 1rem 1.1rem; }
  /* Algo box: slightly smaller font on mobile */
  .algo-box { font-size: 0.78rem; }
}

/* ── Separator ── */
.section-sep {
  border: none;
  border-top: 1px solid #e0e0e0;
  margin: 0;
}

/* ── Alternating section bg ── */
.has-background-alt {
  background-color: #fafafa;
}

/* ── Results grid ── */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}
@media (max-width: 768px) {
  .results-grid { grid-template-columns: 1fr; }
}

/* figure images */
.fig-img {
  width: 100%;
  border-radius: 4px;
  display: block;
}
.fig-img.bordered {
  border: 1px solid #dbdbdb;
}