/* S2VOD project page — clean academic style (Nerfies/RENT-like) */

:root {
  --accent: #2e5fa3;        /* paper hdrblue */
  --accent-light: #9dc3e6;  /* paper cellblue */
  --ink: #1d2530;
  --ink-soft: #4a5568;
  --paper: #ffffff;
  --paper-alt: #f6f8fb;
  --border: #e2e8f0;
  --fam-info: #d7e5f2;      /* info reduction */
  --fam-geo: #dcefdd;       /* geometric */
  --fam-photo: #e4def0;     /* photometric */
  --fam-occ: #f8e8d2;       /* occlusion */
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Noto Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16.5px;
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.container.wide { max-width: 1180px; }

section { padding: 2.2rem 0; }

h2 {
  font-size: 1.75rem;
  text-align: center;
  margin-bottom: 1.1rem;
  font-weight: 700;
}
h3 { font-size: 1.2rem; margin: 1.4rem 0 0.5rem; }

p { margin-bottom: 0.9rem; color: var(--ink); }
.muted { color: var(--ink-soft); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.sc { font-variant: small-caps; }

/* ---------- hero ---------- */

.hero {
  padding: 3.2rem 0 2rem; text-align: center;
  background: linear-gradient(180deg, #eef5fb 0%, #f7fafd 100%);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 2.35rem;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 0.4rem;
}
.hero h1 .method-name { color: var(--accent); }

.hero .venue { color: var(--ink-soft); font-size: 1.05rem; margin-bottom: 1.4rem; }

.authors { font-size: 1.08rem; margin-bottom: 0.35rem; }
.authors span.author { white-space: nowrap; margin: 0 0.45rem; }
.authors sup { font-size: 0.72em; color: var(--ink-soft); }

.affiliations { color: var(--ink-soft); font-size: 0.95rem; margin-bottom: 0.4rem; }
.affiliations sup { font-size: 0.75em; }
.contact { color: var(--ink-soft); font-size: 0.9rem; font-family: ui-monospace, "SF Mono", Menlo, monospace; }

.logo-strip {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center;
  gap: 1.6rem; margin: 1.1rem 0 0.2rem; min-height: 34px;
}
.logo-strip img { height: 34px; width: auto; opacity: 0.9; }
.logo-strip .logo-placeholder {
  color: #a0aec0; font-size: 0.85rem; border: 1px dashed var(--border);
  border-radius: 8px; padding: 4px 12px;
}

.button-row {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem;
  margin-top: 1.3rem;
}
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  background: #222831; color: #fff; border-radius: 999px;
  padding: 0.5rem 1.15rem; font-size: 0.95rem; font-weight: 600;
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn:hover { background: var(--accent); text-decoration: none; transform: translateY(-1px); }
.btn svg { width: 16px; height: 16px; fill: currentColor; }
.btn.disabled { background: #9aa3ad; cursor: default; position: relative; }
.btn.disabled:hover { background: #9aa3ad; transform: none; }
.btn.disabled:hover::after {
  content: attr(data-soon);
  position: absolute; top: calc(100% + 7px); left: 50%; transform: translateX(-50%);
  background: #222831; color: #fff; font-size: 0.78rem; font-weight: 500;
  padding: 3px 11px; border-radius: 7px; white-space: nowrap; z-index: 20;
}

/* ---------- headline stats ---------- */

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.9rem;
  margin: 1.9rem auto 0.4rem; max-width: 920px;
}
.stat {
  background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 0.95rem 0.6rem; text-align: center;
}
.stat .num { font-size: 1.55rem; font-weight: 800; color: var(--accent); line-height: 1.15; }
.stat .lab { font-size: 0.83rem; color: var(--ink-soft); margin-top: 0.25rem; line-height: 1.35; }

/* ---------- teaser ---------- */

.teaser img { width: 100%; height: auto; border-radius: var(--radius); }
.caption {
  font-size: 0.92rem; color: var(--ink-soft); text-align: left;
  max-width: 900px; margin: 0.7rem auto 0;
}
.caption b { color: var(--ink); }

/* ---------- interactive figure ---------- */

.fig-hint {
  text-align: center; font-size: 0.95rem; color: var(--accent);
  background: var(--paper-alt); border: 1px solid var(--border);
  border-radius: 999px; display: table; margin: 0 auto 1rem; padding: 0.3rem 1.1rem;
}

#arch-figure { position: relative; margin: 0 auto; }
#arch-figure > img { display: block; width: 100%; height: auto; }
#arch-figure svg { display: block; }

#arch-figure .hoverable { cursor: pointer; transition: filter 0.12s ease; }
#arch-figure .hoverable:hover { filter: brightness(0.94) saturate(1.35); }
#arch-figure .hoverable.active { filter: brightness(0.92) saturate(1.5); }

.placeholder-note {
  text-align: center; font-size: 0.85rem; color: #a0aec0; margin-top: 0.5rem;
}

/* tooltip (augmentation definitions) */
#fig-tooltip {
  position: absolute; z-index: 60; max-width: 320px;
  background: #222831; color: #f4f6f8; border-radius: 10px;
  padding: 0.65rem 0.85rem; font-size: 0.86rem; line-height: 1.5;
  box-shadow: 0 8px 26px rgba(15, 30, 60, 0.35);
  opacity: 0; pointer-events: none; transition: opacity 0.12s ease;
}
#fig-tooltip.show { opacity: 1; }
#fig-tooltip .tt-name { font-weight: 700; font-size: 0.93rem; }
#fig-tooltip .tt-family {
  display: inline-block; font-size: 0.72rem; font-weight: 600; color: #222831;
  border-radius: 999px; padding: 0 0.55rem; margin-left: 0.45rem; vertical-align: 1px;
}
#fig-tooltip .tt-def { margin-top: 0.3rem; color: #d7dde5; }
#fig-tooltip .tt-strength { margin-top: 0.25rem; color: #9fb6d4; font-size: 0.8rem; }

/* ablation popup (tables) */
#fig-popup {
  position: absolute; z-index: 55; width: min(560px, 92vw);
  background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 14px 40px rgba(15, 30, 60, 0.22);
  padding: 0.85rem 1rem 0.7rem;
  opacity: 0; pointer-events: none; transition: opacity 0.14s ease;
}
#fig-popup.show { opacity: 1; pointer-events: auto; }
#fig-popup .popup-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.15rem; }
#fig-popup .popup-note { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 0.5rem; }
#fig-popup .table-scroll { margin: 0; }
#fig-popup table { font-size: 0.82rem; }
#fig-popup .popup-link { font-size: 0.82rem; display: inline-block; margin-top: 0.45rem; }

/* ---------- tables ---------- */

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 1rem 0; }

table.results {
  border-collapse: collapse; margin: 0 auto; font-size: 0.9rem;
  min-width: 640px; width: 100%;
}
table.results th, table.results td {
  padding: 0.34rem 0.55rem; text-align: center; white-space: nowrap;
}
table.results thead th {
  border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink);
  font-weight: 700;
}
table.results thead tr.span th { border-top: 2px solid var(--ink); border-bottom: none; font-size: 0.85rem; }
table.results thead tr.span + tr th { border-top: none; }
table.results tbody { border-bottom: 2px solid var(--ink); }
table.results td.rowlabel { text-align: left; }
table.results tr.group td {
  text-align: left; color: var(--accent); font-style: italic; font-weight: 600;
  padding-top: 0.5rem; font-size: 0.86rem;
}
table.results tr.scale td {
  text-align: center; font-weight: 700; background: var(--paper-alt);
  border-top: 1px solid var(--ink); border-bottom: 1px solid var(--border);
}
table.results td.best { font-weight: 700; }
table.results td.second { text-decoration: underline; }
table.results tr.ours td { font-weight: 600; }
table.results tr.ours td.rowlabel { color: var(--accent); }
table.results th.avgcol, table.results th.mathgrp { border-left: 1px solid var(--border); }

.table-caption {
  font-size: 0.92rem; color: var(--ink-soft); max-width: 940px; margin: 0.2rem auto 0.8rem;
}
.table-caption b { color: var(--ink); }

.ablation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; align-items: start; }
.ablation-grid .table-scroll { margin-top: 0.4rem; }
.ablation-grid table.results { min-width: 0; }

/* ---------- method ---------- */

.method-block {
  background: var(--paper-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem 1.4rem; margin: 1rem 0;
}
mjx-container { overflow-x: auto; overflow-y: hidden; max-width: 100%; }

.findings { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.2rem; }
.finding {
  background: var(--paper-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.1rem;
}
.finding .k { font-weight: 700; color: var(--accent); display: block; margin-bottom: 0.3rem; }
.finding p { font-size: 0.92rem; margin: 0; color: var(--ink-soft); }

/* ---------- bibtex ---------- */

.bibtex-wrap { position: relative; max-width: 900px; margin: 0 auto; }
pre.bibtex {
  background: #222831; color: #e8edf3; border-radius: var(--radius);
  padding: 1.2rem 1.4rem; overflow-x: auto; font-size: 0.85rem; line-height: 1.55;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
#copy-bibtex {
  position: absolute; top: 0.6rem; right: 0.6rem;
  background: rgba(255,255,255,0.12); color: #e8edf3; border: none;
  border-radius: 8px; padding: 0.3rem 0.7rem; font-size: 0.8rem; cursor: pointer;
}
#copy-bibtex:hover { background: rgba(255,255,255,0.25); }

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--border); margin-top: 2rem;
  padding: 1.6rem 0 2.2rem; text-align: center;
  font-size: 0.85rem; color: var(--ink-soft);
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .findings { grid-template-columns: 1fr; }
  .ablation-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.85rem; }
}


.oursnote { color: var(--accent); font-size: 0.85em; }