/* Mem2Gen project page: layout, typography and the shared figure controls.
   Colours come from tokens.css (never hard-coded here). Load order: tokens.css, then this file. */

/* ------------------------------------------------------------------ type scale & widths */
:root {
  --fs-title: clamp(1.75rem, 1.15rem + 2.6vw, 3rem);
  --fs-h2: clamp(1.5rem, 1.25rem + 1vw, 1.875rem);
  --fs-h3: 1.125rem;
  --fs-body: clamp(1.0625rem, 1rem + .25vw, 1.1875rem);
  --fs-lead: clamp(1.125rem, 1.05rem + .35vw, 1.25rem);
  --fs-ui: .9375rem;
  --fs-caption: .875rem;
  --fs-small: .8125rem;
  --fs-tick: .75rem;
  --w-prose: 700px;
  --w-mid: 880px;
  --w-wide: 1100px;
  --gutter: clamp(16px, 4vw, 32px);
  --nav-h: 52px;
}

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 20px); }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-body);
  font-family: var(--font-serif);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, canvas, video { max-width: 100%; }
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: .18em; text-decoration-color: color-mix(in srgb, var(--link) 40%, transparent); }
a:hover { color: var(--link-hover); text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
::selection { background: color-mix(in srgb, var(--accent) 24%, transparent); }
sub, sup { line-height: 0; }
strong, b { font-weight: 600; color: var(--ink); }
em { font-style: italic; }
var { font-style: italic; }
code, kbd { font-family: var(--font-mono); font-size: .86em; }
.nowrap { white-space: nowrap; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--btn-bg); color: var(--btn-ink); padding: 8px 14px; border-radius: var(--r-s);
  font: 500 var(--fs-small)/1.2 var(--font-sans); text-decoration: none;
}
.skip-link:focus { top: 10px; color: var(--btn-ink); }

/* ------------------------------------------------------------------ top navigation */
.topnav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-med) var(--ease-out);
  font-family: var(--font-sans);
}
.topnav.is-stuck { border-bottom-color: var(--border); }
.topnav-inner {
  height: 100%; max-width: calc(var(--w-wide) + 2 * var(--gutter)); margin: 0 auto;
  padding: 0 var(--gutter); display: flex; align-items: center; gap: 16px;
}
.wordmark {
  font: 600 1rem/1 var(--font-sans); letter-spacing: -.01em; color: var(--ink);
  text-decoration: none; display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
}
.wordmark:hover { color: var(--ink); }
.wordmark svg { width: 18px; height: 18px; border-radius: 4px; }
.navlinks { display: flex; gap: 2px; margin: 0 0 0 auto; padding: 0; list-style: none; }
.navlinks a {
  display: block; padding: 6px 10px; border-radius: var(--r-s);
  font: 500 .875rem/1.2 var(--font-sans); color: var(--ink-2); text-decoration: none; position: relative;
}
.navlinks a:hover { color: var(--ink); background: var(--hover-wash); }
.navlinks a[aria-current="true"] { color: var(--ink); }
.navlinks a[aria-current="true"]::after {
  content: ""; position: absolute; left: 10px; right: 10px; bottom: -1px; height: 2px; border-radius: 1px; background: var(--ink);
}
.nav-tools { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.navbtn {
  width: 36px; height: 36px; border-radius: var(--r-pill); border: 0; padding: 0;
  display: inline-grid; place-items: center; background: transparent; color: var(--ink-2); cursor: pointer; text-decoration: none;
}
.navbtn:hover { background: var(--hover-wash); color: var(--ink); }
.navbtn svg { width: 18px; height: 18px; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: none; }
}
.toc-btn {
  display: none; margin-left: auto; height: 34px; padding: 0 12px; border-radius: var(--r-pill);
  border: 1px solid var(--border-strong); background: transparent; color: var(--ink);
  font: 500 .875rem/1 var(--font-sans); align-items: center; gap: 6px; cursor: pointer;
}
.toc-btn svg { width: 14px; height: 14px; transition: transform var(--dur-fast) var(--ease-out); }
.toc-btn[aria-expanded="true"] svg { transform: rotate(180deg); }
.toc-panel {
  position: absolute; top: calc(100% + 1px); left: 0; right: 0; background: var(--bg);
  border-bottom: 1px solid var(--border); box-shadow: 0 16px 32px rgba(0, 0, 0, .08);
  padding: 8px var(--gutter) 14px;
}
.toc-panel[hidden] { display: none; }
.toc-panel ol { list-style: none; margin: 0 auto; padding: 0; max-width: var(--w-prose); counter-reset: toc; }
.toc-panel a {
  display: flex; gap: 12px; padding: 11px 4px; border-bottom: 1px solid var(--grid);
  font: 500 .9375rem/1.3 var(--font-sans); color: var(--ink); text-decoration: none;
}
.toc-panel li:last-child a { border-bottom: 0; }
.toc-panel a span { color: var(--muted); font-variant-numeric: tabular-nums; min-width: 1.5em; }
.toc-panel a[aria-current="true"] { color: var(--link); }
.progress {
  position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%;
  background: var(--accent); transform-origin: 0 50%; transform: scaleX(0); pointer-events: none;
}
@media (max-width: 999px) {
  .navlinks { display: none; }
  .toc-btn { display: inline-flex; }
}

/* ------------------------------------------------------------------ page columns */
.col { padding-inline: var(--gutter); }
.col > * { max-width: var(--w-prose); margin-left: auto; margin-right: auto; }
.col > .l-mid { max-width: var(--w-mid); }
.col > .l-wide { max-width: var(--w-wide); }
.col > * { min-width: 0; }

/* ------------------------------------------------------------------ hero */
.hero { text-align: center; padding: 64px var(--gutter) 36px; font-family: var(--font-sans); }
.kicker {
  font: 600 .75rem/1.2 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); margin: 0;
}
.kicker span { color: var(--muted); padding: 0 .45em; }
.hero h1 {
  font: 600 var(--fs-title)/1.12 var(--font-serif); letter-spacing: -.015em; color: var(--ink);
  max-width: 920px; margin: 18px auto 26px; text-wrap: balance;
}
.authors { margin: 0 auto; max-width: 820px; padding: 0; list-style: none; display: flex; flex-wrap: wrap; justify-content: center; column-gap: 20px; row-gap: 4px; }
.authors li { font: 450 1.0625rem/1.5 var(--font-sans); color: var(--ink); white-space: nowrap; }
.authors sup, .affils sup { font-size: .68em; color: var(--ink-2); margin-left: 1px; font-feature-settings: "tnum"; }
.affils { margin: 8px 0 0; font: 400 .9375rem/1.5 var(--font-sans); color: var(--ink-2); display: flex; justify-content: center; flex-wrap: wrap; column-gap: 18px; }
.affils sup { margin-right: 2px; margin-left: 0; }
.hero-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 28px auto 0; max-width: 620px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 17px 0 15px; border-radius: var(--r-pill);
  background: var(--btn-bg); color: var(--btn-ink); border: 1px solid transparent;
  font: 500 var(--fs-ui)/1 var(--font-sans); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.btn:hover { background: var(--btn-bg-hover); color: var(--btn-ink); }
.btn svg { width: 16px; height: 16px; flex: none; }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--hover-wash); color: var(--ink); border-color: var(--ink-2); }
.btn--sm { height: 32px; padding: 0 12px 0 11px; font-size: var(--fs-small); gap: 6px; }
.btn--sm svg { width: 14px; height: 14px; }

/* ------------------------------------------------------------------ intro block */
.intro { padding-bottom: 8px; }
.callout {
  background: var(--surface-2); border-radius: 0 var(--r-m) var(--r-m) 0; padding: 18px 22px 18px 22px;
  border-left: 2px solid var(--rule, var(--axis));
  margin-top: 28px; margin-bottom: 28px;
  font: 400 var(--fs-ui)/1.6 var(--font-sans); color: var(--ink-body);
}
.callout > :last-child { margin-bottom: 0; }
.callout p { margin: 0 0 .6em; }
.callout-label {
  display: flex; align-items: center; gap: 7px; margin: 0 0 8px !important;
  font: 600 .75rem/1.2 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2);
}
.callout-label svg { width: 14px; height: 14px; flex: none; }
.callout--tldr { --rule: var(--ink); font: 400 var(--fs-lead)/1.55 var(--font-serif); background: none; border-radius: 0; padding: 2px 0 2px 24px; }
.callout--tldr .callout-label { margin-bottom: 10px !important; }
.callout--key { --rule: var(--accent); }
.callout--key p:not(.callout-label) { font: 400 1.0625rem/1.55 var(--font-serif); color: var(--ink); }
.callout--note {
  background: none; border-left: 0; border-top: 1px solid var(--grid); border-radius: 0; padding: 14px 0 0;
  margin-top: -4px; font-size: var(--fs-caption); color: var(--ink-2);
}
.callout--note strong { color: var(--ink); }
.callout--watch { --rule: var(--ink-2); }
.callout--watch ol { margin: 0; padding: 0; list-style: none; counter-reset: w; }
.callout--watch li { counter-increment: w; position: relative; padding-left: 30px; margin: 0 0 8px; }
.callout--watch li:last-child { margin-bottom: 0; }
.callout--watch li::before {
  content: counter(w); position: absolute; left: 0; top: .1em; width: 20px; height: 20px; border-radius: 50%;
  display: grid; place-items: center; background: var(--bg); border: 1px solid var(--border-strong);
  font: 600 .6875rem/1 var(--font-sans); color: var(--ink); font-variant-numeric: tabular-nums;
}

.kpis {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px;
  margin-top: 36px; margin-bottom: 8px; padding: 0; list-style: none;
}
.kpi { border-top: 1px solid var(--axis); padding-top: 14px; font-family: var(--font-sans); }
.kpi-v { display: block; font: 600 2.125rem/1.1 var(--font-sans); letter-spacing: -.02em; color: var(--ink); }
.kpi-v small { font-size: .5em; font-weight: 500; letter-spacing: 0; color: var(--ink-2); margin-left: 2px; }
.kpi-l { display: block; margin-top: 8px; font: 400 var(--fs-small)/1.5 var(--font-sans); color: var(--ink-2); }

details.abstract { margin-top: 28px; margin-bottom: 0; border-top: 1px solid var(--grid); border-bottom: 1px solid var(--grid); }
details.abstract > summary {
  list-style: none; cursor: pointer; padding: 14px 0; display: flex; align-items: center; gap: 10px;
  font: 600 .8125rem/1.2 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2);
}
details.abstract > summary::-webkit-details-marker { display: none; }
details.abstract > summary:hover { color: var(--ink); }
details.abstract > summary svg { width: 14px; height: 14px; transition: transform var(--dur-fast) var(--ease-out); }
details.abstract[open] > summary svg { transform: rotate(90deg); }
details.abstract > p { margin: 0 0 18px; font-size: 1rem; line-height: 1.65; color: var(--ink-2); }

/* ------------------------------------------------------------------ sections */
.section { padding-top: 72px; padding-bottom: 8px; }
.section:first-of-type { padding-top: 56px; }
.eyebrow {
  display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px;
  font: 600 .75rem/1.2 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2);
}
.eyebrow .num { color: var(--muted); font-variant-numeric: tabular-nums; }
h2 {
  font: 600 var(--fs-h2)/1.2 var(--font-serif); letter-spacing: -.01em; color: var(--ink);
  margin: 0 0 22px; text-wrap: balance;
}
h2 .anchor { margin-left: .3em; font-weight: 400; color: var(--muted); text-decoration: none; opacity: 0; transition: opacity var(--dur-fast); }
h2:hover .anchor, h2 .anchor:focus-visible { opacity: 1; }
h3 { font: 600 var(--fs-h3)/1.35 var(--font-sans); color: var(--ink); margin: 36px 0 10px; }
.section p { margin-top: 0; margin-bottom: 1.1em; }
.section ul.plain, .section ol.plain { padding-left: 1.2em; margin: 0 0 1.1em; }
.section li { margin-bottom: .45em; }
.section li::marker { color: var(--muted); }
.lead-in { font-weight: 600; color: var(--ink); }

/* entity highlight (same role colour as in the self-patching explainer) */
mark.ent {
  background: color-mix(in srgb, var(--entity) 20%, transparent); color: inherit;
  border-radius: 3px; padding: .04em .16em; margin-inline: -.1em; box-decoration-break: clone; -webkit-box-decoration-break: clone;
}

/* status glyphs: the only place the status colours appear */
.glyph { display: inline-block; width: 1em; height: 1em; vertical-align: -.14em; flex: none; }
.glyph.ok { color: var(--good); }
.glyph.bad { color: var(--bad); }

/* inline math-ish notation */
.m { font-family: var(--font-serif); font-style: italic; white-space: nowrap; }
.m sub { font-style: normal; font-size: .72em; }
.m .up { font-style: normal; }

/* ------------------------------------------------------------------ example fact card */
.factcard {
  margin-top: 28px; margin-bottom: 30px; border: 1px solid var(--border); border-radius: var(--r-l);
  background: var(--surface); font-family: var(--font-sans); overflow: hidden;
}
.fc-row {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 20px; row-gap: 4px;
  padding: 14px 18px; border-bottom: 1px solid var(--grid);
}
.fc-kind { grid-column: 1 / -1; font: 600 .6875rem/1.2 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.fc-q { margin: 0 !important; font: 500 .96875rem/1.45 var(--font-sans); color: var(--ink); }
.fc-a { margin: 0 !important; font: 400 .875rem/1.45 var(--font-sans); color: var(--ink-2); }
.fc-a b { font-weight: 500; color: var(--ink); }
.fc-status {
  grid-column: 2; grid-row: 2 / span 2; align-self: center; white-space: nowrap;
  display: inline-flex; align-items: center; gap: 6px; font: 500 .8125rem/1 var(--font-sans); color: var(--ink-2);
}
.fc-status .glyph { width: 16px; height: 16px; vertical-align: 0; }
.fc-row--q { background: var(--surface-2); }
.fc-chain { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 12px 18px; font: 400 .8125rem/1.4 var(--font-sans); color: var(--ink-2); border-bottom: 1px solid var(--grid); }
.fc-chain .node { color: var(--ink); font-weight: 500; }
.fc-chain .rel { color: var(--muted); }
.fc-foot { margin: 0 !important; padding: 10px 18px; font: 400 .75rem/1.4 var(--font-sans); color: var(--muted); }

/* ------------------------------------------------------------------ figures */
.fig { margin-top: 40px; margin-bottom: 44px; }
.fig > figcaption {
  max-width: var(--w-prose); margin: 16px auto 0;
  font: 400 var(--fs-caption)/1.55 var(--font-sans); color: var(--ink-2);
}
.fig.l-wide > figcaption, .fig.l-mid > figcaption { margin-left: 0; margin-right: auto; max-width: min(100%, 46rem); }
.fig-n { font-weight: 600; color: var(--ink); }
.fig .src { display: block; margin-top: 6px; font-size: .75rem; color: var(--muted); }
.plate {
  background: var(--plate); border: 1px solid var(--border); border-radius: var(--r-l); padding: 14px; margin: 0;
}
.plate img { display: block; width: 100%; height: auto; mix-blend-mode: multiply; }
a.plate { display: block; cursor: zoom-in; transition: border-color var(--dur-fast) var(--ease-out); }
a.plate:hover { border-color: var(--border-strong); }
.plate-hint { display: none; }
.fig--table { margin-top: 32px; margin-bottom: 36px; }
.fig--table > figcaption { margin: 0 0 12px; max-width: none; }

/* component mounts */
.m2g-viz { position: relative; min-width: 0; }
.m2g-viz:not([data-m2g]) { min-height: var(--reserve, 240px); display: grid; place-items: center; }
.m2g-viz[data-m2g] > .m2g-fallback { display: none; }
#viz-selfpatch { --reserve: 560px; }
#viz-permeation { --reserve: 520px; }
#viz-mosaic { --reserve: 420px; }
#viz-lrsd { --reserve: 520px; }
#viz-lrsd-models { --reserve: 300px; }
#viz-gap { --reserve: 330px; }
#viz-oracle { --reserve: 290px; }
@media (max-width: 640px) {
  #viz-selfpatch { --reserve: 720px; }
  #viz-permeation { --reserve: 760px; }
  #viz-lrsd { --reserve: 640px; }
  #viz-lrsd-models { --reserve: 620px; }
  #viz-gap { --reserve: 560px; }
  #viz-oracle { --reserve: 520px; }
}
.m2g-fallback, .viz-error {
  margin: 0; width: 100%; align-self: stretch; display: grid; place-items: center; text-align: center;
  padding: 32px 20px; border-radius: var(--r-l); background: var(--surface-2);
  font: 400 var(--fs-small)/1.5 var(--font-sans); color: var(--muted);
}
.viz-error { margin-top: 12px; }

/* stage: the surface behind heat maps (white in light, #1a1a19 in dark) */
.m2g-stage { background: var(--stage); border: 1px solid var(--border); border-radius: var(--r-l); padding: 20px; }
@media (max-width: 640px) { .m2g-stage { padding: 12px; } }

/* ------------------------------------------------------------------ shared figure controls (used by every component) */
.m2g-controls {
  display: flex; align-items: center; gap: 12px; min-height: 36px; flex-wrap: wrap;
  font: 400 var(--fs-small)/1.3 var(--font-sans); color: var(--ink-2);
}
.m2g-iconbtn {
  flex: none; width: 32px; height: 32px; border-radius: 50%; border: 0; padding: 0; cursor: pointer;
  display: inline-grid; place-items: center; background: var(--surface-2); color: var(--ink);
  transition: background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.m2g-iconbtn:hover { background: color-mix(in srgb, var(--ink) 10%, var(--surface-2)); }
.m2g-iconbtn:active { transform: scale(.94); }
.m2g-iconbtn svg { width: 16px; height: 16px; }
.m2g-iconbtn[aria-pressed="true"] { background: var(--btn-bg); color: var(--btn-ink); }
.m2g-iconbtn:disabled { opacity: .4; cursor: default; }

/* range: set style="--fill: 40%" from JS to paint the played part of the track */
.m2g-range {
  --fill: 0%;
  -webkit-appearance: none; appearance: none; flex: 1 1 160px; min-width: 0; height: 24px; margin: 0;
  background: transparent; cursor: pointer; touch-action: pan-y;
}
.m2g-range::-webkit-slider-runnable-track {
  height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--ink-2) var(--fill), var(--grid) var(--fill));
}
.m2g-range::-moz-range-track { height: 4px; border-radius: 2px; background: var(--grid); }
.m2g-range::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--ink-2); }
.m2g-range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 14px; height: 14px; margin-top: -5px; border-radius: 50%;
  background: var(--ink); border: 0; box-shadow: 0 0 0 2px var(--bg);
}
.m2g-range::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: var(--ink); border: 0; box-shadow: 0 0 0 2px var(--bg); }
.m2g-range:focus-visible { outline: none; }
.m2g-range:focus-visible::-webkit-slider-thumb { box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--focus); }
.m2g-range:focus-visible::-moz-range-thumb { box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--focus); }

/* segmented control: buttons inside; the active one has aria-pressed / aria-selected / .is-active */
.m2g-seg {
  display: inline-flex; flex: none; padding: 2px; gap: 2px; border-radius: var(--r-pill); background: var(--surface-2);
  font: 500 .8125rem/1 var(--font-sans);
}
.m2g-seg > button, .m2g-seg > [role="tab"] {
  border: 0; background: transparent; color: var(--ink-2); font: inherit; cursor: pointer;
  padding: 6px 11px; border-radius: var(--r-pill); white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.m2g-seg > button:hover { color: var(--ink); }
.m2g-seg > [aria-pressed="true"], .m2g-seg > [aria-selected="true"], .m2g-seg > .is-active {
  background: var(--bg); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 0 0 1px var(--border);
}
.m2g-readout { font: 500 var(--fs-small)/1.2 var(--font-sans); font-variant-numeric: tabular-nums; color: var(--ink-2); white-space: nowrap; }
.m2g-readout b, .m2g-readout strong { color: var(--ink); font-weight: 600; }

/* tooltip: absolutely positioned inside a position:relative host */
.m2g-tip {
  position: absolute; z-index: 30; pointer-events: none; min-width: 150px; max-width: 290px;
  background: var(--tip-bg); color: var(--ink-2); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--tip-shadow); padding: 9px 11px;
  font: 400 .8125rem/1.35 var(--font-sans); font-variant-numeric: tabular-nums;
}
.m2g-tip[hidden] { display: none; }
.m2g-tip .tip-h { font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.m2g-tip .tip-h small { font-weight: 400; color: var(--ink-2); font-size: 1em; }
.m2g-tip .tip-row { display: flex; align-items: center; gap: 8px; margin: 3px 0; }
.m2g-tip .tip-sep { height: 1px; background: var(--grid); margin: 7px 0; }
.m2g-tip .tip-key { flex: none; width: 12px; height: 2px; border-radius: 1px; background: var(--k, var(--ink-2)); }
.m2g-tip .tip-key.none { background: transparent; }
.m2g-tip .tip-v { font-weight: 600; color: var(--ink); min-width: 3.1em; }
.m2g-tip .tip-l { color: var(--ink-2); }
.m2g-tip .tip-f { margin-top: 7px; font-size: .75rem; color: var(--muted); line-height: 1.35; }

/* legend: text in ink, identity carried by the swatch beside it */
.m2g-legend {
  display: flex; flex-wrap: wrap; align-items: center; column-gap: 18px; row-gap: 6px;
  font: 400 var(--fs-small)/1.3 var(--font-sans); color: var(--ink-2);
}
.m2g-legend .lg { display: inline-flex; align-items: center; gap: 7px; }
.m2g-legend .lg-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--k); flex: none; }
.m2g-legend .lg-ring { width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--k); flex: none; }
.m2g-legend .lg-line { width: 14px; height: 2px; border-radius: 1px; background: var(--k); flex: none; }
.m2g-legend .lg-rect { width: 10px; height: 10px; border-radius: 3px; background: var(--k); flex: none; }
.m2g-legend .lg-tick { width: 2px; height: 12px; border-radius: 1px; background: var(--k); flex: none; }

/* data-table twin of a chart */
details.m2g-data { margin-top: 10px; font-family: var(--font-sans); }
details.m2g-data > summary {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer; list-style: none; padding: 4px 0;
  font: 500 var(--fs-small)/1.2 var(--font-sans); color: var(--ink-2);
}
details.m2g-data > summary::-webkit-details-marker { display: none; }
details.m2g-data > summary::before {
  content: ""; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg); transition: transform var(--dur-fast) var(--ease-out); margin-right: 2px;
}
details.m2g-data[open] > summary::before { transform: rotate(45deg); }
details.m2g-data > summary:hover { color: var(--ink); }
details.m2g-data .table-wrap { margin-top: 8px; margin-bottom: 0; }
details.m2g-data .tbl { font-size: .8125rem; }

/* ------------------------------------------------------------------ tables (booktabs) */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 12px; }
.tbl {
  width: 100%; border-collapse: collapse; font: 400 .875rem/1.4 var(--font-sans); color: var(--ink);
  border-top: 1px solid var(--axis); border-bottom: 1px solid var(--axis);
}
.tbl th {
  -webkit-hyphens: manual; hyphens: manual;
  font-size: .75rem; font-weight: 600; color: var(--ink-2); text-align: right; vertical-align: bottom;
  padding: 10px 12px 8px; border-bottom: 1px solid var(--axis); line-height: 1.3;
}
.tbl td { padding: 9px 12px; border-top: 1px solid var(--grid); text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.tbl tbody tr:first-child td { border-top: 0; }
.tbl th:first-child, .tbl td:first-child { text-align: left; padding-left: 4px; }
.tbl td:first-child { font-weight: 500; }
.tbl tbody tr:hover td { background: var(--hover-wash); }
.tbl .hl { background: var(--surface-2); }
.tbl tbody tr:hover td.hl { background: color-mix(in srgb, var(--ink) 5%, var(--surface-2)); }
.tbl .best { font-weight: 600; }
.tbl .gain { display: inline-block; min-width: 3.4em; margin-left: 6px; font-size: .8125rem; font-weight: 500; color: var(--ink-2); text-align: right; }
.tbl .td-sub, .tbl .th-sub { display: block; margin-top: 2px; font-size: .75rem; font-weight: 400; color: var(--muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.tbl .th-sub { color: var(--muted); }
.tbl .mute { color: var(--muted); }
.tbl tbody th {
  font-size: inherit; font-weight: 500; color: var(--ink); text-align: left; vertical-align: baseline; white-space: nowrap;
  padding: 9px 12px 9px 4px; border-top: 1px solid var(--grid); border-bottom: 0;
}
.tbl tbody tr:first-child th { border-top: 0; }
.tbl tbody tr:hover th { background: var(--hover-wash); }
.tbl thead tr:not(:last-child) th { border-bottom: 1px solid var(--grid); padding-bottom: 6px; }
.tbl thead tr:not(:last-child) th:empty { border-bottom: 0; }
.tbl th.grp-h { text-align: center; color: var(--ink); }
.tbl .mute-l { color: var(--ink-2); }
.tbl .grp td { padding-top: 12px; font: 600 .6875rem/1.2 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); background: none !important; }
.tbl-note { font: 400 .8125rem/1.5 var(--font-sans); color: var(--muted); margin: 8px 0 0 !important; }
.stat-line { font: 400 .9375rem/1.55 var(--font-sans); color: var(--ink-2); }

/* ------------------------------------------------------------------ equation & chips */
.eq {
  margin-top: 24px; margin-bottom: 24px; padding: 22px 16px; border-radius: var(--r-m); background: var(--surface-2);
  overflow-x: auto; text-align: center; color: var(--ink);
}
.eq math { font-size: 1.22em; font-family: "STIX Two Math", "Latin Modern Math", "Cambria Math", math; }
.eq-where { font: 400 var(--fs-caption)/1.55 var(--font-sans); color: var(--ink-2); }
.chips {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; padding: 0; margin-top: 4px; margin-bottom: 18px; list-style: none;
}
.chips li {
  margin: 0; display: flex; flex-direction: column; gap: 2px; padding: 10px 12px; border-radius: var(--r-m);
  background: var(--surface-2); font: 400 .8125rem/1.3 var(--font-sans); color: var(--ink-2);
}
.chips li b { font-weight: 600; color: var(--ink); }
.chips li span { font-size: 1rem; font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; }
.chips li small { font-size: .75rem; font-weight: 400; color: var(--muted); }
.no-list { font: 400 var(--fs-ui)/1.55 var(--font-sans); color: var(--ink-2); margin-top: 0; }

/* scope list */
.scope { list-style: none; padding: 0; margin-top: 8px; margin-bottom: 0; counter-reset: sc; }
.scope li { counter-increment: sc; position: relative; padding: 16px 0 16px 40px; border-top: 1px solid var(--grid); margin: 0; }
.scope li:last-child { border-bottom: 1px solid var(--grid); }
.scope li::before {
  content: counter(sc, decimal-leading-zero); position: absolute; left: 0; top: 19px;
  font: 600 .75rem/1.4 var(--font-sans); letter-spacing: .06em; color: var(--muted); font-variant-numeric: tabular-nums;
}
.scope li strong { display: block; font: 600 1rem/1.4 var(--font-sans); margin-bottom: 4px; }

/* ------------------------------------------------------------------ citation */
.cite-box { position: relative; margin-top: 8px; }
pre.bibtex {
  margin: 0; padding: 20px 22px; padding-right: 110px; border-radius: var(--r-m); background: var(--surface-2);
  border: 1px solid var(--border); overflow-x: auto;
  font: 400 .8125rem/1.65 var(--font-mono); color: var(--ink); tab-size: 2;
  white-space: pre; overflow-wrap: normal;
}
.copy-btn { position: absolute; top: 12px; right: 12px; background: var(--surface-2); }
.copy-btn:hover { background: color-mix(in srgb, var(--ink) 6%, var(--surface-2)); }
.copy-btn[data-copied] { background: var(--btn-bg); color: var(--btn-ink); border-color: transparent; }
.cite-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* ------------------------------------------------------------------ footer */
.footer { margin-top: 96px; border-top: 1px solid var(--border); padding: 26px var(--gutter) 40px; font: 400 .8125rem/1.55 var(--font-sans); color: var(--muted); }
.footer-inner { max-width: var(--w-wide); margin: 0 auto; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 32px; }
.footer a { color: var(--ink-2); }
.footer a:hover { color: var(--ink); }
.footer .fw { font-weight: 600; color: var(--ink-2); }

/* ------------------------------------------------------------------ results.js charts (gap, oracle) */
.rs-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px; margin-bottom: 14px; }
.rs-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: var(--r-pill);
  border: 1px solid var(--border-strong); font: 500 .75rem/1.2 var(--font-sans); color: var(--ink-2); white-space: nowrap;
}
.rs-pill svg { width: 13px; height: 13px; }
.rs-chart { position: relative; }
.rs-chart svg { display: block; overflow: visible; font-family: var(--font-sans); }
.rs-note { margin: 6px 0 0; font: 400 .75rem/1.45 var(--font-sans); color: var(--muted); }
.rs-grid { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.rs-axis { stroke: var(--axis); stroke-width: 1; shape-rendering: crispEdges; }
.rs-tick { fill: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.rs-ptitle { fill: var(--ink); font-size: 13px; font-weight: 600; }
.rs-ptitle tspan.u { fill: var(--ink-2); font-weight: 400; }
.rs-dhead { fill: var(--ink-2); font-size: 12px; font-weight: 600; }
.rs-group { fill: var(--ink-2); font-size: 12px; font-weight: 600; letter-spacing: .01em; }
.rs-label { fill: var(--ink); font-size: 13px; }
.rs-dlabel { fill: var(--ink-2); font-size: 12px; font-variant-numeric: tabular-nums; }
.rs-sep { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.rs-band { fill: var(--hover-wash); fill-opacity: 0; transition: fill-opacity var(--dur-fast) var(--ease-out); }
.rs-row { outline: none; cursor: default; }
.rs-row.is-on .rs-band { fill-opacity: 1; }
.rs-row:focus-visible .rs-band { fill-opacity: 1; stroke: var(--focus); stroke-width: 1.5; }
.rs-conn { stroke: var(--connector); stroke-width: 2; stroke-linecap: round; fill: none; }
.rs-conn--gen { stroke: var(--gen); stroke-opacity: .4; }
.rs-dot { stroke: var(--bg); stroke-width: 2; transition: r var(--dur-fast) var(--ease-out); }
.rs-dot--mem { fill: var(--mem); }
.rs-dot--gen { fill: var(--gen); }
.rs-ring { fill: var(--bg); stroke: var(--gen); stroke-width: 2; }
.rs-memtick { fill: var(--mem); }
.rs-row.is-on .rs-dot, .rs-row:focus-visible .rs-dot { r: 6px; }
.rs-row.is-on .rs-dlabel { fill: var(--ink); }

/* ------------------------------------------------------------------ small screens */
@media (max-width: 720px) {
  .kpis { grid-template-columns: 1fr; gap: 18px; }
  .kpi { display: grid; grid-template-columns: 7.75rem minmax(0, 1fr); column-gap: 12px; align-items: baseline; }
  .kpi-v { font-size: 1.5rem; white-space: nowrap; }
  .kpi-l { margin-top: 0; }
  .chips { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .hero { padding-top: 40px; padding-bottom: 24px; }
  .hero h1 { margin: 14px auto 20px; }
  .authors { column-gap: 14px; }
  .authors li { font-size: 1rem; }
  .hero-links { gap: 8px; }
  .btn { height: 38px; padding: 0 14px 0 12px; font-size: .875rem; }
  .section { padding-top: 56px; }
  .fig { margin-top: 28px; margin-bottom: 32px; }
  .plate { padding: 8px; border-radius: var(--r-m); }
  .plate--scroll { overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; }
  .plate--scroll img { width: var(--scroll-w, 720px); max-width: none; }
  .plate-hint { display: block; margin: 6px 0 0; font: 400 .75rem/1.4 var(--font-sans); color: var(--muted); }
  .callout { padding: 16px 16px 16px 17px; }
  .callout--tldr { padding: 2px 0 2px 18px; }
  .callout--note { padding: 12px 0 0; }
  .fc-row { grid-template-columns: minmax(0, 1fr); padding: 12px 14px; }
  .fc-status { grid-column: 1; grid-row: auto; margin-top: 4px; }
  .fc-chain, .fc-foot { padding-left: 14px; padding-right: 14px; }
  pre.bibtex { padding: 16px; padding-top: 56px; font-size: .75rem; }
  .tbl { font-size: .8125rem; }
  .tbl th, .tbl td { padding-left: 6px; padding-right: 6px; }
  .tbl thead th { font-size: .6875rem; }
  .tbl tbody th { padding-left: 2px; }
  .tbl td .gain { display: block; margin: 1px 0 0; min-width: 0; font-size: .75rem; }
  .tbl td.mem { white-space: normal; min-width: 4.2em; }
  .footer { margin-top: 72px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
}

@media print {
  .topnav, .skip-link, .hero-links, .copy-btn, .m2g-controls { display: none !important; }
  body { font-size: 11pt; }
  .section { padding-top: 24px; break-inside: auto; }
  .fig { break-inside: avoid; }
}