.project-container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.project-header { text-align: center; padding: 40px 0 30px; }
.project-venue-badge {
  display: inline-block;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 6px 18px;
  border-radius: 25px;
  font-size: 0.9em;
  font-weight: 600;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}
.project-container .project-title {
  font-size: 2.2em;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 15px;
  color: #1a1a1a;
}
.project-subtitle {
  font-size: 1.3em;
  color: #555;
  font-weight: 400;
  margin-bottom: 25px;
}
.project-authors {
  font-size: 1.1em;
  margin-bottom: 10px;
  line-height: 1.8;
}
.project-authors a {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
}
.project-authors a:hover { text-decoration: underline; }
.affiliations {
  font-size: 0.95em;
  color: #666;
  margin-bottom: 25px;
}
.affiliations sup { color: #667eea; font-weight: 600; }
.links-bar {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.links-bar a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 1em;
  font-weight: 600;
  text-decoration: none;
  color: #fff;
  transition: all 0.2s ease;
}
.links-bar a:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}
.btn-arxiv { background: #b31b1b; }
.btn-pdf { background: #d4451a; }
.btn-code { background: #24292e; }
.btn-video { background: #ff0000; }
.teaser-section { margin: 30px 0 40px; text-align: center; }
.teaser-image {
  max-width: 100%;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.teaser-caption {
  margin-top: 15px;
  font-size: 0.95em;
  color: #555;
  font-style: italic;
}
.abstract-section {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: 12px;
  padding: 30px 35px;
  margin: 40px 0;
}
.abstract-title {
  font-size: 1.4em;
  font-weight: 700;
  margin-bottom: 15px;
  color: #1a1a1a;
}
.abstract-text {
  font-size: 1.05em;
  line-height: 1.8;
  color: #333;
  text-align: justify;
}
.project-section { margin: 50px 0; }
.section-title {
  font-size: 1.6em;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid #667eea;
  display: inline-block;
}
.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin: 30px 0;
}
.method-card {
  background: #fff;
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-left: 4px solid #667eea;
}
.method-card h3 {
  font-size: 1.2em;
  color: #667eea;
  margin-bottom: 12px;
  font-weight: 600;
}
.method-card p {
  font-size: 0.95em;
  line-height: 1.7;
  color: #444;
  margin: 0;
}
.figure-block {
  margin: 35px 0;
  text-align: center;
}
.figure-block img {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.figure-caption {
  margin-top: 12px;
  font-size: 0.9em;
  color: #555;
  line-height: 1.5;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}
.result-item {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 3px 15px rgba(0,0,0,0.06);
  text-align: center;
}
.result-number {
  font-size: 2.5em;
  font-weight: 700;
  color: #667eea;
  line-height: 1;
}
.result-label {
  font-size: 0.95em;
  color: #555;
  margin-top: 8px;
}
.highlights-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 25px 0;
}
.highlights-list li {
  list-style: none !important;
  padding: 14px 20px 14px 20px;
  margin-bottom: 8px;
  font-size: 1em;
  line-height: 1.6;
  color: #333;
  border-left: 3px solid #667eea;
}
.bibtex-section {
  background: #f6f8fa;
  border-radius: 10px;
  padding: 25px;
  margin: 30px 0;
  position: relative;
}
.bibtex-code {
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 0.8em;
  line-height: 1.6;
  color: #24292e;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.bibtex-copy-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  background: #667eea;
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85em;
  font-weight: 500;
  transition: background 0.2s;
}
.bibtex-copy-btn:hover { background: #5a6fd6; }
@media (max-width: 768px) {
  .project-container .project-title { font-size: 1.6em; }
  .project-subtitle { font-size: 1.1em; }
  .links-bar a { padding: 8px 18px; font-size: 0.9em; }
  .abstract-section { padding: 20px; }
  .method-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   PROJECT PAGE — v2 enhancements (hero, TOC, fade-in, contribution cards)
   Added 2026-04-22 for /cast/ and /dsgram/ polish pass
   ========================================================================== */

/* -------- Hero tagline + sticky CTA bar -------- */
.pp-hero-tagline {
  font-size: 1.05em;
  color: #475569;
  text-align: center;
  max-width: 760px;
  margin: 8px auto 22px;
  line-height: 1.65;
  font-style: italic;
}

.pp-hero-tagline strong {
  color: #1e3a8a;
  font-style: normal;
}

/* sticky CTA bar appears once user scrolls past the original hero */
.pp-cta-sticky {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  padding: 6px 8px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.pp-cta-sticky.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.pp-cta-sticky a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.85em;
  font-weight: 600;
  text-decoration: none !important;
  color: #1e3a8a !important;
  transition: background 0.15s, color 0.15s;
}

.pp-cta-sticky a:hover {
  background: #1e3a8a;
  color: #fff !important;
}

@media (max-width: 700px) {
  .pp-cta-sticky { display: none; }
}

/* -------- In-page mini TOC (sits just below hero on desktop) -------- */
.pp-toc {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid #e2e8f0;
  padding: 10px 0;
  margin: -20px -10px 30px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pp-toc-inner {
  display: flex;
  gap: 4px;
  justify-content: center;
  flex-wrap: nowrap;
  padding: 0 16px;
  white-space: nowrap;
}

.pp-toc a {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.86em;
  font-weight: 500;
  color: #475569 !important;
  text-decoration: none !important;
  transition: background 0.15s, color 0.15s;
  border: 1px solid transparent;
}

.pp-toc a:hover {
  background: #fff;
  color: #1e3a8a !important;
  border-color: #cbd5e1;
}

.pp-toc a.is-active {
  background: #1e3a8a;
  color: #fff !important;
}

/* offset anchor scroll target so it doesn't sit under sticky TOC */
.pp-anchor {
  display: block;
  position: relative;
  top: -70px;
  visibility: hidden;
}

/* -------- Numbered contribution cards (replaces .highlights-list) -------- */
.pp-contrib-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.pp-contrib-card {
  position: relative;
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 24px 24px 22px 70px;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
  overflow: hidden;
}

.pp-contrib-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6);
  opacity: 0;
  transition: opacity 0.2s;
}

.pp-contrib-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
  border-color: #cbd5e1;
}

.pp-contrib-card:hover::before {
  opacity: 1;
}

.pp-contrib-num {
  position: absolute;
  left: 20px;
  top: 22px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1e3a8a, #3b82f6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.pp-contrib-title {
  font-size: 1.05em;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 8px;
  line-height: 1.35;
}

.pp-contrib-text {
  font-size: 0.94em;
  color: #475569;
  line-height: 1.6;
  margin: 0;
}

/* -------- Scroll fade-in (shared with /skills/ pattern) -------- */
.pp-fadeup {
  opacity: 0;
  transform: translateY(40px) scale(0.985);
  filter: blur(2px);
  transition: opacity 0.85s cubic-bezier(0.22, 0.7, 0.25, 1),
              transform 0.85s cubic-bezier(0.22, 0.7, 0.25, 1),
              filter 0.85s ease;
}

.pp-fadeup.is-visible {
  opacity: 1;
  transform: none;
  filter: none;
}

.pp-fadeup-stagger > * {
  opacity: 0;
  transform: translateY(30px) scale(0.97);
  filter: blur(1.5px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.7, 0.25, 1),
              transform 0.7s cubic-bezier(0.22, 0.7, 0.25, 1),
              filter 0.7s ease;
}

.pp-fadeup-stagger.is-visible > *:nth-child(1) { transition-delay: 0.00s; opacity: 1; transform: none; filter: none; }
.pp-fadeup-stagger.is-visible > *:nth-child(2) { transition-delay: 0.10s; opacity: 1; transform: none; filter: none; }
.pp-fadeup-stagger.is-visible > *:nth-child(3) { transition-delay: 0.20s; opacity: 1; transform: none; filter: none; }
.pp-fadeup-stagger.is-visible > *:nth-child(4) { transition-delay: 0.30s; opacity: 1; transform: none; filter: none; }
.pp-fadeup-stagger.is-visible > *:nth-child(5) { transition-delay: 0.40s; opacity: 1; transform: none; filter: none; }
.pp-fadeup-stagger.is-visible > *:nth-child(6) { transition-delay: 0.50s; opacity: 1; transform: none; filter: none; }

@media (prefers-reduced-motion: reduce) {
  .pp-fadeup, .pp-fadeup-stagger > * {
    opacity: 1; transform: none; filter: none; transition: none;
  }
  .pp-cta-sticky { transition: none; }
}