/* ===== CSS RESET & VARIABLES ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#fff;
  --bg-alt:#f8f9fa;
  --text:#1a1a2e;
  --text-muted:#555;
  --accent:#4361ee;
  --accent-light:#eef1ff;
  --border:#e0e0e0;
  --radius:8px;
  --radius-lg:12px;
  --shadow:0 2px 12px rgba(0,0,0,.06);
  --shadow-lg:0 8px 30px rgba(0,0,0,.08);
  --transition:0.25s ease;
  --font-display:'Google Sans','Noto Sans',system-ui,sans-serif;
  --font-body:'Noto Sans','Google Sans',system-ui,sans-serif;
  --max-w:1100px;
  --max-w-wide:1320px;
  --max-w-narrow:820px;
  --ours-green:#e8f5e9;
  --ours-border:#43a047;
}

html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:var(--font-body);color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
strong{font-weight:600}

/* ===== LAYOUT ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.container.wide{max-width:var(--max-w-wide)}
.container.narrow{max-width:var(--max-w-narrow)}

/* ===== NAVBAR ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--transition);
}
.navbar.scrolled{box-shadow:0 2px 16px rgba(0,0,0,.08)}
.nav-inner{
  max-width:var(--max-w-wide);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;height:56px;gap:32px;
}
.nav-brand{
  font-family:var(--font-display);font-weight:700;font-size:1.15rem;
  color:var(--text);letter-spacing:-.02em;
}
.nav-brand:hover{text-decoration:none}
.nav-links{display:flex;gap:24px}
.nav-links a{
  font-size:.875rem;font-weight:500;color:var(--text-muted);
  transition:color var(--transition);
}
.nav-links a:hover{color:var(--accent);text-decoration:none}
.nav-toggle{display:none;background:none;border:none;font-size:1.2rem;cursor:pointer;color:var(--text)}

/* ===== HERO ===== */
.hero{
  padding:120px 24px 64px;text-align:center;
  background:linear-gradient(175deg,#f0f4ff 0%,#fff 50%,#f8faf9 100%);
}
.hero .title{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(1.6rem,4vw,2.65rem);line-height:1.25;
  color:var(--text);margin-bottom:12px;
}
.hero .venue{
  display:inline-block;padding:4px 16px;border-radius:99px;
  background:var(--accent);color:#fff;font-size:.8rem;font-weight:600;
  letter-spacing:.05em;margin-bottom:20px;
}
.authors{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 20px;margin-bottom:8px}
.author{font-size:.95rem;font-weight:500}
.author sup{font-size:.65em;color:var(--accent)}
.affiliations{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 18px;margin-bottom:24px}
.affiliations span{font-size:.82rem;color:var(--text-muted)}
.affiliations sup{font-size:.65em;color:var(--accent)}

/* Buttons */
.links{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:24px}
.btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 20px;border-radius:99px;font-size:.875rem;font-weight:500;
  color:var(--text);background:#fff;border:1.5px solid var(--border);
  transition:all var(--transition);cursor:pointer;
}
.btn:hover{border-color:var(--accent);color:var(--accent);text-decoration:none;box-shadow:var(--shadow)}
.btn i{font-size:.95em}
.btn-lg{padding:12px 28px;font-size:.95rem}

/* TL;DR */
.tldr{
  max-width:700px;margin:0 auto;
  font-size:.92rem;color:var(--text-muted);line-height:1.6;
  background:var(--accent-light);padding:14px 20px;border-radius:var(--radius);
}

/* ===== SECTIONS ===== */
.section{padding:72px 24px}
.section.alt{background:var(--bg-alt)}
.section-title{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(1.4rem,3vw,1.9rem);text-align:center;
  margin-bottom:12px;color:var(--text);
}
.section-desc,.subsection-desc{
  text-align:center;max-width:760px;margin:0 auto 32px;
  font-size:.93rem;color:var(--text-muted);line-height:1.65;
}
.subsection-title{
  font-family:var(--font-display);font-weight:600;
  font-size:1.15rem;text-align:center;margin:40px 0 8px;
}

/* ===== TEASER ===== */
.teaser-grid{display:flex;flex-direction:column;gap:32px}

/* Dataset blocks */
.dataset-block{
  border-radius:var(--radius-lg);padding:20px;
  display:flex;flex-direction:column;gap:16px;
}
.dataset-block.fscoco{background:#eef3ff;border:1px solid #c8d6f0}
.dataset-block.tuberlin{background:#f0ecf8;border:1px solid #d1c7e8}
.dataset-block.inkscenes{background:#f5ecf7;border:1px solid #ddc5e3}

.dataset-block-header{
  display:flex;align-items:center;gap:10px;
  padding-bottom:8px;margin-bottom:4px;
}
.dataset-badge{
  display:inline-block;padding:3px 10px;border-radius:99px;
  font-size:.68rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
}
.dataset-badge.fscoco{background:#d0ddf7;color:#1a56a8}
.dataset-badge.tuberlin{background:#d6cbec;color:#3a1d8e}
.dataset-badge.inkscenes{background:#e0c4e8;color:#6a1b7a}
.dataset-note{
  font-size:.74rem;color:var(--text-muted);font-style:italic;
}

/* Angle header row — sits above the first teaser-row */
.teaser-angle-header{
  display:grid;grid-template-columns:100px repeat(11,1fr);gap:6px;
  padding:0 14px;
}
.teaser-angle-header span{
  font-size:.62rem;font-weight:600;color:var(--text-muted);
  text-align:center;text-transform:uppercase;letter-spacing:.03em;
}
.teaser-angle-header .spacer{visibility:hidden}

.teaser-row{
  display:grid;grid-template-columns:100px repeat(11,1fr);gap:6px;
  align-items:center;
  background:rgba(255,255,255,.65);border-radius:var(--radius);
  padding:10px 14px;transition:box-shadow var(--transition);
}
.teaser-row:hover{box-shadow:var(--shadow-lg)}
.teaser-caption{
  font-size:.65rem;color:var(--text-muted);text-align:center;
  line-height:1.35;font-style:italic;padding-right:4px;
}
.teaser-input{display:flex;align-items:center;justify-content:center}
.teaser-input img{
  width:100%;aspect-ratio:1;object-fit:contain;
  border:1px solid var(--border);border-radius:var(--radius);
  background:#fafafa;
}
.teaser-views{
  display:contents;
}
.teaser-views img{
  width:100%;aspect-ratio:1;object-fit:cover;
  border-radius:6px;cursor:pointer;
  transition:transform var(--transition),box-shadow var(--transition);
}
.teaser-views img:hover{transform:scale(1.04);box-shadow:var(--shadow)}

/* Domain tags */
.domain-tag{
  display:inline-block;padding:2px 8px;border-radius:99px;
  font-size:.62rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;
}
.domain-tag.fscoco{background:#e3f2fd;color:#1565c0}
.domain-tag.tuberlin{background:#ede7f6;color:#4527a0}
.domain-tag.inkscenes{background:#f3e5f5;color:#7b1fa2}

/* ===== ABSTRACT ===== */
.abstract-text p{font-size:.94rem;line-height:1.75;margin-bottom:16px;color:var(--text)}
.abstract-text p:last-child{margin-bottom:0}

/* ===== METHOD ===== */
.method-demo{
  display:flex;align-items:center;gap:24px;
  justify-content:center;margin-bottom:48px;flex-wrap:wrap;
}
.method-input{text-align:center}
.method-input img{
  width:180px;height:180px;object-fit:contain;
  border:1px solid var(--border);border-radius:var(--radius);
  background:#fafafa;margin:0 auto;
}
.method-arrow{font-size:1.6rem;color:var(--accent);flex-shrink:0}
.method-output{text-align:center;max-width:520px}
.label{font-size:.78rem;color:var(--text-muted);margin-top:8px;display:block}

.views-grid{display:grid;gap:6px}
.views-grid.four-col{grid-template-columns:repeat(4,1fr)}
.views-grid img{
  width:100%;aspect-ratio:1;object-fit:cover;
  border-radius:6px;cursor:pointer;
  transition:transform var(--transition);
}
.views-grid img:hover{transform:scale(1.06)}

/* Cards */
.card-grid{display:grid;gap:20px}
.card-grid.three-col{grid-template-columns:repeat(3,1fr)}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:28px 24px;text-align:center;
  transition:box-shadow var(--transition),transform var(--transition);
}
.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.card-icon{
  width:52px;height:52px;border-radius:50%;
  background:var(--accent-light);color:var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;margin:0 auto 16px;
}
.card h3{font-family:var(--font-display);font-size:1.05rem;font-weight:600;margin-bottom:10px}
.card p{font-size:.84rem;color:var(--text-muted);line-height:1.6}

/* ===== FIGURES ===== */
.figure-block{text-align:center;margin:40px auto 32px}
.figure-block .img-full{
  display:block;margin:0 auto;
  width:80%;max-width:1100px;border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow);
}

/* ===== TABLES ===== */
.table-wrap{overflow-x:auto;margin:0 auto;max-width:900px}
.data-table{
  width:100%;border-collapse:collapse;font-size:.85rem;
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--border);
}
.data-table th,.data-table td{padding:10px 14px;text-align:center;white-space:nowrap}
.data-table thead{background:#f5f6fa}
.data-table th{font-weight:600;font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.02em}
.data-table tbody tr{border-top:1px solid var(--border)}
.data-table tbody tr:hover{background:#fafbff}
.row-ours{background:var(--ours-green) !important}
.row-ours td:first-child{border-left:3px solid var(--ours-border)}

/* ===== COMPARISON ===== */
.comp-selector{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:24px}
.comp-btn{
  padding:8px 18px;border-radius:99px;border:1.5px solid var(--border);
  background:#fff;font-size:.82rem;cursor:pointer;
  transition:all var(--transition);font-style:italic;color:var(--text-muted);
}
.comp-btn:hover,.comp-btn.active{
  border-color:var(--accent);color:var(--accent);background:var(--accent-light);
}

.comp-block{max-width:1000px;margin:0 auto}
.comp-row{margin-bottom:16px}
.comp-row-label{
  font-size:.82rem;font-weight:600;margin-bottom:6px;
  display:flex;align-items:center;gap:8px;
}
.comp-row-label .method-badge{
  display:inline-block;padding:2px 10px;border-radius:99px;font-size:.72rem;
  font-weight:600;letter-spacing:.03em;
}
.method-badge.gt{background:#fff3e0;color:#e65100}
.method-badge.ours{background:var(--ours-green);color:#2e7d32}
.method-badge.seva{background:#e3f2fd;color:#1565c0}
.method-badge.vc{background:#fce4ec;color:#c62828}
.comp-images{display:grid;grid-template-columns:repeat(8,1fr);gap:5px}
.comp-images img{
  width:100%;aspect-ratio:1;object-fit:cover;border-radius:5px;
  cursor:pointer;transition:transform var(--transition);
}
.comp-images img:hover{transform:scale(1.06)}

/* ===== ATTENTION ===== */
.attn-examples{display:flex;flex-direction:column;gap:40px}
.attn-block{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:20px;display:flex;flex-direction:column;gap:16px;
}
.attn-sketch{
  display:flex;flex-direction:column;align-items:center;gap:4px;
}
.attn-sketch img{
  width:140px;height:140px;object-fit:contain;
  border:1px solid var(--border);border-radius:var(--radius);background:#fafafa;
}
.attn-sketch span{font-size:.75rem;font-weight:500;color:var(--text-muted)}
.attn-halves{display:flex;flex-direction:column;gap:12px}
.attn-half{}
.attn-badge{
  display:inline-block;padding:3px 10px;border-radius:99px;
  font-size:.7rem;font-weight:600;margin-bottom:6px;
}
.attn-badge.ours{background:var(--ours-green);color:#2e7d32}
.attn-badge.nocorr{background:#fff3e0;color:#e65100}
.attn-imgs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.attn-imgs>div{text-align:center}
.attn-imgs img{
  width:100%;aspect-ratio:1;object-fit:cover;border-radius:5px;
  cursor:pointer;transition:transform var(--transition);
}
.attn-imgs img:hover{transform:scale(1.06)}
.attn-imgs span{font-size:.65rem;color:var(--text-muted)}

/* ===== GENERALISATION (teaser-style with 12 views) ===== */
.gen-angle-header{
  display:grid;grid-template-columns:1fr repeat(12,1fr);gap:6px;
  padding:0 14px;
}
.gen-angle-header span{
  font-size:.62rem;font-weight:600;color:var(--text-muted);
  text-align:center;text-transform:uppercase;letter-spacing:.03em;
}
.gen-group-label{
  font-weight:700 !important;color:var(--text) !important;
  border-bottom:1.5px solid var(--border);padding-bottom:2px;
}
.gen-azim-header{margin-top:-4px}
.gen-teaser-row{
  display:grid;grid-template-columns:1fr repeat(12,1fr);gap:6px;
  align-items:center;
  background:rgba(255,255,255,.65);border-radius:var(--radius);
  padding:10px 14px;transition:box-shadow var(--transition);
}
.gen-teaser-row:hover{box-shadow:var(--shadow-lg)}
.gen-teaser-row .teaser-views{display:contents}
.gen-teaser-row .teaser-views img{
  width:100%;aspect-ratio:1;object-fit:cover;
  border-radius:6px;cursor:pointer;
  transition:transform var(--transition),box-shadow var(--transition);
}
.gen-teaser-row .teaser-views img:hover{transform:scale(1.04);box-shadow:var(--shadow)}

/* ===== BIBTEX ===== */
.bibtex-box{
  position:relative;background:#1e1e2e;color:#cdd6f4;
  border-radius:var(--radius-lg);padding:20px 24px;overflow-x:auto;
}
.bibtex-box pre{font-size:.82rem;line-height:1.6;white-space:pre;margin:0;font-family:'Fira Code','Source Code Pro',monospace}
.copy-btn{
  position:absolute;top:12px;right:12px;
  background:rgba(255,255,255,.1);border:none;color:#cdd6f4;
  width:32px;height:32px;border-radius:6px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background var(--transition);
}
.copy-btn:hover{background:rgba(255,255,255,.2)}

/* ===== FOOTER ===== */
.footer{
  padding:32px 24px;text-align:center;
  border-top:1px solid var(--border);
}
.footer p{font-size:.8rem;color:var(--text-muted)}
.footer a{color:var(--accent)}

/* ===== LIGHTBOX ===== */
.lightbox{
  position:fixed;inset:0;z-index:200;
  background:rgba(0,0,0,.85);backdrop-filter:blur(4px);
  display:none;align-items:center;justify-content:center;
  cursor:zoom-out;
}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:90vh;border-radius:var(--radius);object-fit:contain}
.lb-close{
  position:absolute;top:16px;right:20px;
  background:none;border:none;color:#fff;font-size:2rem;cursor:pointer;
  opacity:.7;transition:opacity var(--transition);
}
.lb-close:hover{opacity:1}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
  .card-grid.three-col{grid-template-columns:1fr}
  .comp-images{grid-template-columns:repeat(4,1fr)}
  .attn-block{flex-direction:column}
  .attn-sketch{flex-direction:row;gap:12px}
  .attn-sketch img{width:80px;height:80px}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-links.open{
    display:flex;flex-direction:column;position:absolute;
    top:56px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);
    padding:12px 24px;gap:12px;box-shadow:var(--shadow);
  }
  .nav-toggle{display:block;margin-left:auto}
  .dataset-block{padding:12px}
  .teaser-angle-header{display:none}
  .teaser-row{grid-template-columns:1fr;gap:8px}
  .teaser-caption{text-align:center;font-size:.65rem}
  .teaser-input img{width:60px;height:60px}
  .teaser-views{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
  .method-demo{flex-direction:column}
  .views-grid.four-col{grid-template-columns:repeat(3,1fr)}
  .gen-angle-header{display:none}
  .gen-teaser-row{grid-template-columns:1fr;gap:8px}
  .gen-teaser-row .teaser-views{display:grid;grid-template-columns:repeat(6,1fr);gap:4px}
  .attn-imgs{grid-template-columns:repeat(2,1fr)}
  .hero .title{font-size:1.5rem}
  .hide-mobile{display:none}
}
@media(max-width:480px){
  .teaser-views{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}
  .gen-teaser-row .teaser-views{grid-template-columns:repeat(4,1fr)}
  .comp-images{grid-template-columns:repeat(3,1fr)}
  .section{padding:48px 16px}
}