/* Single white theme, following the Nerfies / Zip-NeRF pages: the paper's figures are white-ground images */
:root {
  --bg: #ffffff;
  --text: #4a4a4a;
  --title: #363636;
  --muted: #767676;
  --rule: #dbdbdb;
  --code-bg: #f5f5f5;
  --link: #3273dc;
  --link-hover: #363636;
  --active: #eef3fc;
  --mark: #fdf3c4;
  --rgb: #0e4a80;
  --rgb-tint: #e4eff8;
  --phase: #0b6a52;
  --phase-tint: #e2f1e9;
  --attn: #9a3a1a;
  --attn-tint: #f9e8e0;
  --fuse: #3a3289;
  --fuse-tint: #ebeaf9;
  --io: #6b665c;
  --io-tint: #f1efe9;
  --mask-austenite: #e2f1e9;
  --mask-ferrite: #0b6a52;
  --col: 800px;
  --heading: "Google Sans Flex", "Google Sans", "Noto Sans", system-ui, sans-serif;
  --body: "Noto Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  padding-inline: 20px;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 var(--body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 3px; border-radius: 2px; }
h1, h2, p, figure, pre, ul, ol { margin: 0; }
sup { font-size: 0.62em; line-height: 0; }
code { font-family: var(--mono); font-size: 0.88em; }

/* One column width for every block, so text, figures and tables share the same edges */
.page { max-width: var(--col); margin-inline: auto; padding-block: 56px 40px; display: grid; gap: 64px; grid-template-columns: minmax(0, 1fr); }
section { display: grid; gap: 22px; grid-template-columns: minmax(0, 1fr); }
h2 { font: 600 2rem/1.25 var(--heading); color: var(--title); text-align: center; text-wrap: balance; }
.prose { display: grid; gap: 14px; grid-template-columns: minmax(0, 1fr); }
.prose p { text-align: justify; }

.masthead { display: grid; gap: 16px; justify-items: center; text-align: center; }
h1 { display: grid; gap: 8px; justify-items: center; font-weight: 400; }
.title-main { font: 400 clamp(30px, 5.4vw, 44px)/1.15 var(--heading); color: var(--title); text-wrap: balance; }
.title-main b { font-weight: 700; }
.title-sub { font: 400 clamp(18px, 2.7vw, 24px)/1.3 var(--heading); color: #555555; text-wrap: balance; }
.authors { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px 22px; margin-top: 6px; font: 400 20px/1.5 var(--heading); color: var(--title); }
.affil { font: 400 15.5px/1.6 var(--heading); color: #555555; text-wrap: balance; }
.links { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 44px; margin-top: 10px; }
.links a { display: grid; justify-items: center; gap: 10px; min-width: 64px; font: 600 16px/1 var(--heading); }
.links a:hover { text-decoration: none; }
.links a:hover .link-label { text-decoration: underline; }
.ico { height: 64px; display: grid; place-items: end center; color: #24292f; }
.paper-ico { width: 50px; height: 64px; border: 1px solid var(--rule); box-shadow: 0 1px 3px rgb(0 0 0 / 0.12); }
.ico-data .body { fill: #7d8a97; }
.ico-data .top { fill: #bcc5cd; }
.ico-data .band { fill: none; stroke: #bcc5cd; stroke-width: 1.6; }

.tldr { font: 400 20px/1.5 var(--heading); color: var(--text); text-align: center; text-wrap: balance; }
.tldr b { color: var(--title); font-weight: 700; }

figure { display: grid; gap: 10px; }
.fig-img { display: block; width: 100%; }
figcaption { font: 400 15px/1.55 var(--body); color: var(--muted); text-align: center; text-wrap: balance; }

/* Region-of-interest stepper: Appendix A drawn to scale, one step at a time */
/* Diagram ~55%, steps ~45%, sized so the two columns come out about the same height */
.roi { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr); gap: 24px; align-items: center; }
.roi svg { display: block; width: 100%; height: auto; border-radius: 6px; }
.s { opacity: 0; transition: opacity 0.5s ease; }
.s.on { opacity: 1; }
.late.on { transition-delay: 1.1s; }
.grow { transform: scale(var(--k, 0.98776)); transition: transform 1.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.5s ease; }
.lbl { font: 600 26px var(--heading); fill: var(--title); paint-order: stroke; stroke: #ffffff; stroke-width: 7px; stroke-linejoin: round; }
.roi-steps { list-style: none; padding: 0; display: grid; gap: 2px; }
.roi-steps button {
  all: unset; box-sizing: border-box; display: grid; grid-template-columns: 22px 1fr; gap: 9px;
  width: 100%; padding: 5px 8px; border-radius: 6px; cursor: pointer; color: var(--text);
}
.roi-steps button:hover { background: var(--code-bg); }
.roi-steps button:focus-visible { outline: 2px solid var(--link); outline-offset: 1px; }
.roi-steps button[aria-current="step"] { background: var(--active); }
.num-badge {
  width: 22px; height: 22px; margin-top: 1px; border-radius: 50%; border: 1.5px solid var(--rule);
  display: grid; place-items: center; font: 600 12px/1 var(--heading); color: var(--muted);
}
.roi-steps button[aria-current="step"] .num-badge { background: var(--link); border-color: var(--link); color: #ffffff; }
.step-name { display: block; font: 600 14.5px/1.3 var(--heading); color: var(--title); }
.eq { display: block; font: 400 13.5px/1.45 var(--body); color: var(--text); }
.roi-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; }
.btn {
  padding: 7px 18px; border: 0; border-radius: 999px; background: var(--title); color: #ffffff;
  font: 500 14.5px/1.3 var(--heading); cursor: pointer;
}
.btn:hover { background: #1f1f1f; }

/* Micrograph / mask comparison, after the BakedSDF slider; the three dividers move together */
.trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.compare {
  --pos: 50%;
  position: relative; width: 100%; aspect-ratio: 1; border-radius: 6px; overflow: hidden; user-select: none;
}
.compare img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.compare .top { clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.divider { position: absolute; top: 0; bottom: 0; left: var(--pos); width: 2px; margin-left: -1px; background: #ffffff; box-shadow: 0 0 0 1px rgb(0 0 0 / 0.2); pointer-events: none; }
.knob {
  position: absolute; top: 50%; left: var(--pos); width: 32px; height: 32px; margin: -16px 0 0 -16px;
  border-radius: 50%; background: #ffffff; color: var(--title); box-shadow: 0 1px 5px rgb(0 0 0 / 0.35);
  display: grid; place-items: center; pointer-events: none; transition: transform 0.15s ease;
}
.compare:hover .knob { transform: scale(1.08); }
.compare input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: ew-resize; }
.compare:has(input:focus-visible) { outline: 2px solid var(--link); outline-offset: 3px; }
.side-label { position: absolute; top: 8px; padding: 4px 7px; border-radius: 4px; pointer-events: none; font: 500 12px/1.2 var(--heading); background: rgb(0 0 0 / 0.55); color: #ffffff; }
.side-label.left { left: 8px; }
.side-label.right { right: 8px; }
.specimen { display: grid; gap: 0; font: 400 14px/1.5 var(--body); color: var(--muted); font-variant-numeric: tabular-nums; }
.specimen b { color: var(--title); font-weight: 600; }
.key { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 22px; font: 400 14.5px/1.5 var(--body); color: var(--muted); }
.sw { display: inline-block; width: 11px; height: 11px; border-radius: 2px; margin-right: 7px; vertical-align: -1px; border: 1px solid var(--rule); }
.sw-a { background: var(--mask-austenite); }
.sw-f { background: var(--mask-ferrite); }

/* Architecture: Fig. 5 beside a legend keyed to its box colours */
.arch { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; align-items: center; }
.legend { list-style: none; padding: 0; display: grid; gap: 12px; font-size: 15.5px; line-height: 1.5; }
.legend li { display: grid; grid-template-columns: 16px 1fr; gap: 12px; align-items: start; }
.legend b { color: var(--title); font-weight: 600; }
.chip { width: 16px; height: 16px; margin-top: 3px; border-radius: 3px; border: 1.5px solid; }
.c-rgb { background: var(--rgb-tint); border-color: var(--rgb); }
.c-phase { background: var(--phase-tint); border-color: var(--phase); }
.c-attn { background: var(--attn-tint); border-color: var(--attn); }
.c-io { background: var(--io-tint); border-color: var(--io); }
.c-fuse { background: var(--fuse-tint); border-color: var(--fuse); }

/* Phase-attention slides, after ZipMap's "Scene State Query": one specimen at a time */
.attn { display: grid; gap: 12px; }
.attn-slide { display: grid; gap: 10px; }
.attn-slide[hidden] { display: none; }
.attn-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.attn-cell { position: relative; }
.attn-cell img { display: block; width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 6px; }
/* Equal side tracks keep the colour ramp itself on the column's centre line */
.attn-scale { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 10px; font: 400 14px/1.5 var(--body); color: var(--muted); }
.attn-scale span:first-child { justify-self: end; }
.attn-scale span:last-child { justify-self: start; }
.ramp { width: min(140px, 26vw); height: 10px; border-radius: 5px; background: linear-gradient(90deg, #00007f, #0000ff, #00ffff, #ffff00, #ff0000, #7f0000); }
.attn-nav { display: flex; align-items: center; justify-content: center; gap: 24px; font: 500 14.5px/1 var(--heading); color: var(--muted); font-variant-numeric: tabular-nums; }
.nav-btn { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--rule); background: var(--bg); color: var(--title); font: 500 17px/1 var(--heading); cursor: pointer; }
.nav-btn:hover { border-color: var(--link); color: var(--link); }

.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 600px; border-collapse: collapse; font: 400 15.5px/1.45 var(--body); color: var(--title); }
th, td { padding: 9px 10px; border-bottom: 1px solid var(--rule); text-align: left; vertical-align: middle; }
thead th { font: 600 14.5px/1.3 var(--heading); color: var(--title); border-bottom: 2px solid var(--rule); white-space: nowrap; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.flag { width: 40px; text-align: center; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid var(--rule); vertical-align: middle; }
.dot.r { background: var(--io); border-color: var(--io); }
.dot.a { background: var(--attn); border-color: var(--attn); }
.dot.f { background: var(--phase); border-color: var(--phase); }
.base td { color: var(--muted); }
td.best { background: var(--mark); font-weight: 600; }
.key .dot { margin-right: 7px; vertical-align: -1px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

pre { background: var(--code-bg); border-radius: 6px; padding: 1.1em 1.4em; overflow-x: auto; font: 400 14.5px/1.65 var(--mono); color: var(--text); }
pre code { font-size: inherit; }
.bib { position: relative; }
.bib pre { padding-right: 92px; font-size: 14px; }
.copy { position: absolute; top: 10px; right: 10px; padding: 6px 12px; border: 1px solid var(--rule); border-radius: 4px; background: var(--bg); color: var(--title); font: 500 13px/1.2 var(--heading); cursor: pointer; }
.copy:hover { border-color: var(--link); color: var(--link); }

.paper { display: block; border: 1px solid var(--rule); border-radius: 6px; padding: 10px; background: var(--bg); }
.paper:hover { border-color: var(--link); }
.paper img { display: block; width: 100%; }

.fine { font: 400 14.5px/1.6 var(--body); color: var(--muted); }
.page-foot { text-align: center; padding-top: 22px; border-top: 1px solid var(--rule); }

@media (max-width: 720px) {
  .roi, .arch { grid-template-columns: minmax(0, 1fr); }
  .page { gap: 52px; padding-block: 40px 32px; }
}
@media (max-width: 560px) {
  .trio { grid-template-columns: minmax(0, 1fr); }
  .links { gap: 12px 30px; }
  .prose p { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  .s, .grow, .knob { transition: none; }
}