:root {
  --paper:    #fcfaf3;  /* page background: barely-beige off-white */
  --paper-2:  #f6f2e6;  /* recessed areas */
  --card:     #fffefa;  /* card surface, near-pure-white */
  --ink:      #1c1813;  /* warm near-black ink */
  --ink-2:    #2f2920;
  --muted:    #6f6452;  /* warm gray */
  --muted-2:  #9b8f78;
  --rule:     #ddd0ad;  /* hairline rule, warm taupe */
  --rule-2:   #c8b88e;  /* stronger rule */
  --accent:   #c89515;  /* embodiment gold: matches the yellow of the renders */
  --accent-soft: #e0ad24;
  --accent-warn: #a85a18;
  --accent-tint: rgba(200, 149, 21, 0.12);
  --maxw: 1040px;
  --maxw-narrow: 720px;
  --radius: 4px;
  --radius-md: 10px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16.5px;
  line-height: 1.65;
  font-feature-settings: "ss01", "cv11", "kern";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-tint); color: var(--ink); }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
a:hover { border-bottom-color: currentColor; }

p { margin: 0 0 14px; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
.narrow { max-width: var(--maxw-narrow); margin: 0 auto; padding: 0 28px; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in oklab, var(--paper) 92%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topbar .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.9rem;
}
.brand {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.01em;
  border-bottom: none;
}
.brand:hover { border-bottom: none; }
.brand em {
  font-style: normal;
  color: var(--accent);
}
.topbar nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.topbar nav a {
  color: var(--muted);
  font-size: 0.9rem;
  border-bottom: none;
}
.topbar nav a:hover { color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 28px;
  text-align: center;
}
.kicker {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 26px;
}
.kicker .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 8px;
  vertical-align: middle;
  margin-top: -2px;
}

.hero h1 {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-weight: 500;
  font-size: clamp(2.2rem, 5.3vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}
.hero h1 .word {
  font-style: italic;
  color: var(--accent);
  font-weight: 500;
}
.hero h1 .name {
  font-weight: 600;
  letter-spacing: -0.025em;
}

.hero .deck {
  font-size: clamp(1.05rem, 1.55vw, 1.18rem);
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto 26px;
  line-height: 1.55;
}

.hero .authors {
  color: var(--muted-2);
  font-size: 0.92rem;
  margin: 0 0 30px;
  letter-spacing: 0.02em;
}

.btnrow {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 500;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.btn:hover {
  border-color: var(--ink);
  border-bottom-color: var(--ink);
  background: var(--card);
  transform: translateY(-1px);
}
.btn.primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn .ico {
  width: 14px; height: 14px;
  flex-shrink: 0;
}

/* ---------- Hero video strip ---------- */
.strip {
  margin-top: 52px;
}
.strip-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}
.strip-grid .cell {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  position: relative;
}
.strip-grid .cell img,
.strip-grid .cell video {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 0.5s ease;
}
.strip-grid .cell:hover img,
.strip-grid .cell:hover video { transform: scale(1.04); }
.strip-grid .cell .tag {
  position: absolute;
  left: 8px; bottom: 8px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  background: rgba(251,245,226,0.88);
  border: 1px solid var(--rule);
  padding: 2px 7px;
  border-radius: 999px;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

/* ---------- Section ---------- */
section {
  padding: 64px 0 12px;
  border-top: 1px solid var(--rule);
}
section.no-rule { border-top: none; }
section + section { padding-top: 64px; }

.section-head {
  margin-bottom: 28px;
}
.eyebrow {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
h2 {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-weight: 500;
  font-size: clamp(1.7rem, 2.8vw, 2.2rem);
  letter-spacing: -0.015em;
  line-height: 1.18;
  margin: 0 0 14px;
}
h2 em { font-style: italic; color: var(--accent); }
h3 {
  font-family: "Newsreader", "Source Serif 4", Georgia, serif;
  font-weight: 500;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.lede {
  color: var(--muted);
  max-width: 680px;
  font-size: 1.02rem;
}
.lede strong { color: var(--ink); font-weight: 600; }
.body { max-width: 680px; }

/* Sections with image/video panels: text spans the full panel width.
   Findings keeps the narrower reading column. */
#abstract .body,
#splitting .lede,
#families .lede,
#scaling .lede,
#paper .lede {
  max-width: none;
}
.body p { color: var(--ink-2); }
.body p strong { color: var(--ink); }

.figcaption {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.55;
  margin-top: 14px;
  max-width: 720px;
}
.figcaption strong { color: var(--ink); font-weight: 600; }

/* ---------- Joint-splitting strip ---------- */
.split {
  margin-top: 8px;
}
.split-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}
.split-row + .split-row { margin-top: 14px; }
.split-row .cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}
.split-row .cell .frame {
  aspect-ratio: 1 / 1;
  width: 100%;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.split-row .cell .frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.split-row .cell .label {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.split-row .cell .label .strong { color: var(--ink); }
.split-title {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin: 0 0 12px;
}

/* ---------- Family grid (legacy small cards) ---------- */
.families {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.family {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.family .frame {
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.family:hover .frame { border-color: var(--rule-2); transform: translateY(-1px); }

/* ---------- Family grid (enlarged, combined section) ---------- */
.family-grid-big {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.family-big {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.family-big:hover { border-color: var(--rule-2); transform: translateY(-1px); }
.family-big .frame {
  aspect-ratio: 16 / 10;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}
.family-big .frame img,
.family-big .frame video {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.family-big .meta {
  padding: 18px 20px 22px;
}
.family-big .meta > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 12px;
}
.family-big h3 {
  font-size: 1.4rem;
  margin: 0;
}
.family-big .dof-tag {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.family-big table.info {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.family-big table.info th,
.family-big table.info td {
  text-align: left;
  vertical-align: top;
  padding: 6px 0;
  border: none;
}
.family-big table.info th {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  width: 80px;
  padding-right: 14px;
  text-transform: uppercase;
}
.family-big table.info td {
  color: var(--ink-2);
}
.family-big table.info td.mono {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86rem;
}
.family-big table.info td .muted {
  color: var(--muted-2);
  font-size: 0.78rem;
  margin-left: 4px;
}
.family-big table.info td.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.family-big .tag {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 2px 8px;
  border-radius: 999px;
}
.family .frame img,
.family .frame video {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.family h3 { margin: 0; }
.family p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.family .meta {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 2px;
}
.family .meta .chip {
  border: 1px solid var(--rule-2);
  border-radius: 999px;
  padding: 2px 8px;
}
.family .meta .chip.accent {
  border-color: var(--accent-soft);
  color: var(--accent);
}

/* ---------- Scaler (DoF slider) ---------- */
.scaler {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 4px;
}
.scaler .stage {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.scaler .stage .main {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
}
.scaler .stage .main img,
.scaler .stage .main video {
  width: 100%; height: 100%; object-fit: contain; display: block;
}
.scaler .stage .overlay {
  position: absolute;
  top: 14px; left: 14px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--ink);
  background: rgba(251,245,226,0.92);
  border: 1px solid var(--rule);
  padding: 4px 10px;
  border-radius: 999px;
}
.scaler .stage .overlay b { font-weight: 600; }
.scaler .closeup-row {
  display: flex;
  border-top: 1px solid var(--rule);
}
.scaler .closeup-row .cell { position: relative; aspect-ratio: 1 / 1; background: var(--paper-2); flex: 1 1 0; min-width: 0; }
.scaler .closeup-row .cell + .cell { border-left: 1px solid var(--rule); }
.scaler .closeup-row .cell img { width: 100%; height: 100%; object-fit: cover; display: block; }
.scaler .closeup-row .cell .lbl {
  position: absolute;
  left: 10px; bottom: 10px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.7rem;
  color: var(--muted);
  background: rgba(251,245,226,0.92);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  border-radius: 999px;
}

.scaler .controls h3 { margin-bottom: 6px; }
.scaler .switcher {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 16px 0 18px;
}
.scaler .switcher button {
  background: transparent;
  border: 1px solid var(--rule-2);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  font: inherit;
  font-size: 0.86rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.scaler .switcher button:hover { color: var(--ink); border-color: var(--ink); }
.scaler .switcher button.on {
  color: #fff;
  background: var(--ink);
  border-color: var(--ink);
}

.scaler input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 2px;
  background: var(--rule-2);
  border-radius: 999px;
  outline: none;
  margin: 18px 0 8px;
}
.scaler input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.scaler input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  cursor: pointer;
}
.scaler .ticks {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--muted);
}
.scaler .ticks button {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  padding: 5px 0;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}
.scaler .ticks button.on { color: var(--ink); background: var(--paper-2); border-color: var(--rule); }
.scaler .ticks button:hover { color: var(--ink); }

.scaler .scaler-hint {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 0.86rem;
  color: var(--muted);
}
.scaler .scaler-hint b { color: var(--ink); font-weight: 600; }

.scaler .curve {
  margin-top: 18px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper-2);
}
.scaler .curve img { width: 100%; display: block; }

/* ---------- Findings ---------- */
.findings {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 4px;
}
.finding .num {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--ink);
  width: 32px;
}
.finding h3 { margin: 0 0 8px; }
.finding p { color: var(--muted); margin: 0; }

.findings + .figure-block { margin-top: 40px; }

/* Figure blocks */
.figure-block {
  margin-top: 24px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--card);
}
.figure-block img { width: 100%; display: block; }
.figure-block .cap {
  padding: 14px 18px 18px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.55;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}
.figure-block .cap strong { color: var(--ink); font-weight: 600; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; margin-top: 4px; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th {
  text-align: left;
  padding: 10px 12px 10px 0;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
}
td {
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
tr:last-child td { border-bottom: none; }
td.mono { font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace; color: var(--ink-2); }
td.fam { font-family: "Newsreader", "Source Serif 4", Georgia, serif; font-weight: 500; font-size: 1.05rem; }

/* ---------- BibTeX ---------- */
.bibtex {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre;
  cursor: pointer;
  position: relative;
}
.bibtex::after {
  content: "Click to select";
  position: absolute;
  top: 12px; right: 16px;
  font-size: 0.72rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color: var(--muted-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: none;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--rule);
  margin-top: 80px;
  padding: 28px 0 64px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}
footer .top {
  display: inline-block;
  margin-bottom: 12px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
footer a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .families { grid-template-columns: repeat(2, 1fr); }
  .family-grid-big { grid-template-columns: 1fr; gap: 18px; }
  .findings { grid-template-columns: 1fr; gap: 20px; }
  .scaler { grid-template-columns: 1fr; gap: 22px; }
  .strip-grid { grid-template-columns: repeat(4, 1fr); }
  .split-row { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .container, .narrow { padding: 0 18px; }
  .topbar .inner { padding: 10px 18px; }
  .hero { padding: 48px 0 12px; }
  .families { grid-template-columns: 1fr; }
  .strip-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .split-row { grid-template-columns: repeat(2, 1fr); }
  .topbar nav { display: none; }
  .family-big .kv { grid-template-columns: 90px 1fr; }
}