:root {
      --primary: #1a1a2e;
      --accent: #e07530;
      --accent-light: #fff1e8;
      --fractal: #c45e1a;
      --fractal-light: #fde8d4;
      --text: #2c2c2c;
      --muted: #6b7280;
      --border: #e5e7eb;
      --bg-alt: #f9fafb;
    }

    * { box-sizing: border-box; }

    body {
      font-family: 'Inter', sans-serif;
      color: var(--text);
      line-height: 1.7;
      background: #ffffff;
    }

    /* ── Hero ─────────────────────────────────── */
    .hero-section {
      background:
        radial-gradient(circle at 18% 20%, rgba(255,255,255,0.14), transparent 30%),
        linear-gradient(rgba(8,8,12,0.62), rgba(8,8,12,0.78)),
        url('../images/sierpinski-checker-texture-dark.png'),
        var(--primary);
      background-size: auto, auto, 768px 768px, auto;
      background-position: center, center, center top, center;
      padding: 4rem 1.5rem 3rem;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('../images/sierpinski-checker-texture.png') repeat center top;
      background-size: 384px 384px;
      opacity: 0.12;
      pointer-events: none;
    }

    .paper-title {
      font-size: clamp(1.45rem, 3.2vw, 2.55rem);
      font-weight: 700;
      color: #ffffff;
      line-height: 1.28;
      margin: 0 0 1.5rem;
      letter-spacing: 0.01em;
      max-width: 980px;
      margin-left: auto;
      margin-right: auto;
    }

    .paper-title .method-name {
      color: #ffffff;
    }

    .venue-badge {
      display: inline-block;
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(255,255,255,0.25);
      color: #fff;
      border-radius: 999px;
      padding: 0.25rem 1rem;
      font-size: 0.9rem;
      font-weight: 500;
      margin-bottom: 1.8rem;
      letter-spacing: 0.03em;
    }

    .authors {
      color: rgba(255,255,255,0.85);
      font-size: 0.95rem;
      margin-bottom: 0.6rem;
    }

    .author-name {
      font-weight: 500;
      color: rgba(255,255,255,0.9);
      text-decoration: underline;
      text-underline-offset: 3px;
      text-decoration-color: rgba(255,255,255,0.35);
      transition: text-decoration-color 0.2s;
    }

    .author-name:hover {
      color: #fff;
      text-decoration-color: rgba(255,255,255,0.8);
    }

    .affiliation {
      color: rgba(255,255,255,0.55);
      font-size: 0.85rem;
      margin-bottom: 2rem;
    }

    .link-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
      justify-content: center;
    }

    .link-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(255,255,255,0.12);
      border: 1.5px solid rgba(255,255,255,0.3);
      color: #fff;
      border-radius: 8px;
      padding: 0.5rem 1.1rem;
      font-size: 0.88rem;
      font-weight: 500;
      text-decoration: none;
      transition: background 0.2s, border-color 0.2s;
    }

    .link-btn:hover {
      background: rgba(255,255,255,0.22);
      border-color: rgba(255,255,255,0.5);
      color: #fff;
    }

    /* ── Section layout ───────────────────────── */
    .content-section {
      padding: 4rem 1.5rem;
      max-width: 1000px;
      margin: 0 auto;
    }

    .content-section.alt-bg {
      background: var(--bg-alt);
      max-width: 100%;
      padding: 4rem 1.5rem;
    }

    .content-section.alt-bg > .inner {
      max-width: 1000px;
      margin: 0 auto;
    }

    .method-section {
      background: var(--bg-alt);
      padding: 4rem 1.5rem 2.5rem;
    }

    .qualitative-section {
      padding-top: 2.5rem;
    }

    .section-title {
      font-size: 1.55rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 1.2rem;
      padding-bottom: 0.5rem;
      border-bottom: none;
    }

    .teaser-results {
      background: var(--bg-alt);
      padding: 1.5rem 1.5rem 0;
    }

    .top-results-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
      max-width: 1000px;
      margin: 0 auto;
    }

    /* ── Abstract ─────────────────────────────── */
    .section-heading-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    .abstract-heading-row {
      margin-bottom: 1.2rem;
    }

    .section-heading-row .section-title {
      margin-bottom: 0;
    }

    .abstract-toggle-button {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      border: 0;
      background: transparent;
      color: var(--muted);
      cursor: pointer;
      font: inherit;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 0;
    }

    .abstract-toggle-button:hover {
      color: var(--primary);
    }

    .abstract-toggle-icon {
      width: 1.55rem;
      height: 1.55rem;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      line-height: 1;
    }

    .abstract-text {
      font-size: 1rem;
      line-height: 1.8;
      color: var(--text);
      background: var(--accent-light);
      border-left: 4px solid var(--accent);
      padding: 1.4rem 1.6rem;
      border-radius: 0 8px 8px 0;
    }

    /* ── Method cards ─────────────────────────── */
    .contribution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      margin-top: 1.5rem;
    }

    @media (max-width: 700px) {
      .contribution-grid { grid-template-columns: 1fr; }
    }

    .contrib-card {
      border-radius: 12px;
      padding: 1.5rem;
      background: #fff;
      border: 1.5px solid var(--border);
      box-shadow: 0 10px 24px rgba(17, 24, 39, 0.05);
    }

    .contrib-card h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }

    .contrib-card p {
      font-size: 0.9rem;
      color: var(--muted);
      line-height: 1.6;
    }

    .contrib-card .tag-pill {
      display: inline-block;
      background: var(--fractal-light);
      color: var(--fractal);
      border-radius: 999px;
      font-size: 0.72rem;
      font-weight: 600;
      padding: 0.15rem 0.7rem;
      margin-bottom: 0.6rem;
      letter-spacing: 0.04em;
    }

    /* ── Pipeline figure ──────────────────────── */
    .pipeline-container {
      background: var(--bg-alt);
      border-radius: 12px;
      padding: 1.5rem;
      margin: 1.5rem 0;
      text-align: center;
    }

    .pipeline-container img {
      max-width: 100%;
      border-radius: 8px;
    }

    .fig-caption {
      font-size: 0.85rem;
      color: var(--muted);
      margin-top: 0.8rem;
      line-height: 1.5;
    }

    /* ── Comparison section ───────────────────── */
    .comparison-stack {
      display: grid;
      gap: 1.2rem;
    }

    .comparison-row {
      align-items: start;
    }

    .method-cols {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0.75rem;
    }

    @media (max-width: 900px) {
      .method-cols { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 500px) {
      .method-cols { grid-template-columns: 1fr; }
    }

    .method-col {
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .method-col .method-label {
      font-size: 0.78rem;
      font-weight: 600;
      padding: 0.3rem 0.6rem;
      border-radius: 6px;
      margin-bottom: 0.5rem;
      display: inline-block;
    }

    .label-baseline {
      background: #f3f4f6;
      color: #6b7280;
    }

    .label-ours {
      background: var(--fractal-light);
      color: var(--fractal);
    }

    .method-col img {
      width: 100%;
      border-radius: 8px;
      border: 2px solid transparent;
    }

    .method-col.ours-col img {
      border-color: var(--fractal);
    }

    /* ── Results gallery ──────────────────────── */
    .results-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
    }

    @media (max-width: 800px) {
      .results-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 500px) {
      .results-grid { grid-template-columns: 1fr; }
    }

    .result-card {
      border-radius: 10px;
      overflow: hidden;
      position: relative;
      border: 1px solid rgba(17,17,17,0.12);
      box-shadow: 0 8px 18px rgba(17,24,39,0.06);
    }

    .result-card img,
    .result-card video {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      display: block;
    }

    /* ── Dome texture comparison ──────────────── */
    .dome-compare {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      align-items: start;
    }

    @media (max-width: 600px) {
      .dome-compare { grid-template-columns: 1fr; }
    }

    /* ── BibTeX ───────────────────────────────── */
    .bibtex-block {
      background: #1e1e2e;
      color: #cdd6f4;
      border-radius: 10px;
      padding: 1.4rem 1.6rem;
      font-family: 'Inter', sans-serif;
      font-size: 0.82rem;
      line-height: 1.7;
      overflow-x: auto;
      white-space: pre;
    }

    .bibtex-block .kw { color: #89b4fa; }
    .bibtex-block .str { color: #a6e3a1; }

    /* ── Footer ───────────────────────────────── */
    .site-footer {
      background: var(--primary);
      color: rgba(255,255,255,0.5);
      text-align: center;
      padding: 2rem 1.5rem;
      font-size: 0.82rem;
    }

    .site-footer a { color: rgba(255,255,255,0.7); text-decoration: underline; }

    /* ── Stat badges ──────────────────────────── */
    .stat-row {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      margin: 1.5rem 0;
    }

    .stat-card {
      flex: 1;
      min-width: 140px;
      background: var(--accent-light);
      border-radius: 10px;
      padding: 1rem 1.2rem;
      text-align: center;
    }

    .stat-card .stat-num {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.1;
    }

    .stat-card .stat-desc {
      font-size: 0.78rem;
      color: var(--muted);
      margin-top: 0.2rem;
      line-height: 1.3;
    }