/* Mercury to gold: a vintage science-magazine feature. Vellum paper, iron-gall
   ink, gold leaf, cinnabar (mercury's ore) for protons and quicksilver grey for
   mercury. Figures sit on engraved "plates" with a double rule. */

.xp-mercury-to-gold {
  --paper: #f4ecda;
  --plate: #ebdfc4;
  --plate-deep: #e2d3b2;
  --ink: #231b12;
  --ink-soft: #5b4b39;
  --rule: rgba(35, 27, 18, 0.22);
  --gold: #c99620;
  --gold-hi: #f0cf6a;
  --gold-ink: #7d5300;
  --cinnabar: #9e2f1b;
  --cinnabar-hi: #d4573a;
  --silver: #8c989f;
  --silver-hi: #dfe5e8;
  --silver-ink: #46545c;
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --measure: 40rem;
  --wide: 64rem;

  display: block;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.1875rem;
  font-variation-settings: "SOFT" 50, "WONK" 0;
  font-optical-sizing: auto;
  line-height: 1.65;
  background: var(--paper);
}

.xp-mercury-to-gold *,
.xp-mercury-to-gold *::before,
.xp-mercury-to-gold *::after {
  box-sizing: border-box;
}

.xp-mercury-to-gold .mg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.xp-mercury-to-gold a {
  color: var(--gold-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.xp-mercury-to-gold a:hover {
  color: var(--ink);
}

.xp-mercury-to-gold a:focus-visible,
.xp-mercury-to-gold button:focus-visible,
.xp-mercury-to-gold summary:focus-visible,
.xp-mercury-to-gold input:focus-visible {
  outline: 2.5px solid var(--gold-ink);
  outline-offset: 3px;
  border-radius: 3px;
}

.xp-mercury-to-gold p {
  margin: 0 0 1.1em;
}

.xp-mercury-to-gold sup {
  font-size: 0.68em;
  line-height: 0;
}

.xp-mercury-to-gold b {
  font-weight: 650;
}

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

.xp-mercury-to-gold .mg-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  grid-template-areas:
    "text tiles"
    "short short";
  gap: 2.5rem 4rem;
  align-items: center;
  max-width: 68rem;
  margin: 2.5rem auto 3.5rem;
}

.xp-mercury-to-gold .mg-hero__text {
  grid-area: text;
}

.xp-mercury-to-gold .mg-title {
  margin: 0 0 1.5rem;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5.2vw, 4.6rem);
  font-weight: 620;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 144;
  line-height: 1.02;
  letter-spacing: -0.022em;
  text-wrap: balance;
}

.xp-mercury-to-gold .mg-dek {
  max-width: 36rem;
  margin: 0;
  font-size: 1.28rem;
  line-height: 1.55;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.xp-mercury-to-gold .mg-hero__tiles {
  grid-area: tiles;
  margin: 0;
}

.xp-mercury-to-gold .mg-tiles {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.xp-mercury-to-gold .mg-tile {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: clamp(7.5rem, 13vw, 10.5rem);
  aspect-ratio: 1;
  border: 2px solid var(--ink);
  border-radius: 4px;
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 5px rgba(35, 27, 18, 0.45), 6px 7px 0 rgba(35, 27, 18, 0.12);
  overflow: hidden;
}

.xp-mercury-to-gold .mg-tile--hg {
  background: radial-gradient(120% 90% at 30% 20%, #f4f7f8 0%, var(--silver-hi) 35%, #a9b4ba 100%);
}

.xp-mercury-to-gold .mg-tile--au {
  background: radial-gradient(120% 90% at 30% 20%, #fff0bd 0%, var(--gold-hi) 38%, #c08c18 100%);
}

.xp-mercury-to-gold .mg-tile--au::after {
  content: "";
  position: absolute;
  inset: -20%;
  background: linear-gradient(115deg, transparent 38%, rgba(255, 252, 235, 0.75) 50%, transparent 62%);
  transform: translateX(-120%);
  animation: xp-mercury-to-gold-shine 1.6s 1.1s cubic-bezier(0.4, 0, 0.2, 1) both;
  pointer-events: none;
}

.xp-mercury-to-gold .mg-tile__z {
  position: absolute;
  top: 0.7rem;
  left: 0.85rem;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.xp-mercury-to-gold .mg-tile__sign {
  position: absolute;
  top: 0.65rem;
  right: 0.75rem;
  width: 1rem;
  height: 1.25rem;
  color: var(--ink);
}

.xp-mercury-to-gold .mg-tile__sym {
  font-size: clamp(3.2rem, 5.6vw, 4.5rem);
  font-weight: 560;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 144;
  line-height: 1;
  margin-top: -0.4rem;
}

.xp-mercury-to-gold .mg-tile__name {
  position: absolute;
  bottom: 0.7rem;
  left: 0;
  right: 0;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 500;
}

.xp-mercury-to-gold .mg-tiles__arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1 1 5rem;
  max-width: 7.5rem;
  min-width: 3.5rem;
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-tiles__arrow svg {
  width: 100%;
  height: 1.6rem;
  stroke-dasharray: 160;
  stroke-dashoffset: 0;
  animation: xp-mercury-to-gold-draw 0.9s 0.35s ease-out both;
}

.xp-mercury-to-gold .mg-tiles__arrow span {
  margin-top: 0.3rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.9rem;
  line-height: 1.2;
  text-align: center;
}

.xp-mercury-to-gold .mg-hero__tiles figcaption {
  max-width: 26rem;
  margin: 1.4rem auto 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink-soft);
  text-align: center;
}

.xp-mercury-to-gold .mg-short {
  grid-area: short;
  position: relative;
  padding: 1.6rem 2rem 1.2rem;
  background: var(--plate);
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: inset 0 0 0 5px var(--plate), inset 0 0 0 6px var(--rule);
}

.xp-mercury-to-gold .mg-short h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-style: italic;
  font-weight: 600;
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-short p {
  margin: 0 0 0.6rem;
  font-size: 1.2rem;
  line-height: 1.6;
  column-count: 2;
  column-gap: 3rem;
}

@keyframes xp-mercury-to-gold-shine {
  to {
    transform: translateX(120%);
  }
}

@keyframes xp-mercury-to-gold-draw {
  from {
    stroke-dashoffset: 160;
  }
}

/* ---- the video ------------------------------------------------------------ */

.xp-mercury-to-gold .mg-video {
  max-width: 54rem;
  margin: 0 auto 1rem;
}

.xp-mercury-to-gold .mg-video__frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--ink);
}

.xp-mercury-to-gold .mg-video__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.xp-mercury-to-gold .mg-plate--video {
  padding: 0.75rem;
}

.xp-mercury-to-gold .mg-caption {
  margin: 0.7rem 0 0;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-align: center;
}

/* ---- plates (figures) ---------------------------------------------------- */

.xp-mercury-to-gold .mg-plate {
  position: relative;
  background: var(--plate);
  border: 1px solid var(--rule);
  border-radius: 3px;
  box-shadow: inset 0 0 0 6px var(--plate), inset 0 0 0 7px var(--rule);
}

.xp-mercury-to-gold .mg-sec .mg-plate {
  width: min(var(--wide), calc(100vw - 2.5rem));
  margin: 2.25rem 0 2.25rem calc(50% - min(var(--wide), calc(100vw - 2.5rem)) / 2);
  padding: 2rem 2rem 1.4rem;
}

.xp-mercury-to-gold .mg-plate figcaption {
  grid-column: 1 / -1;
  margin-top: 1.4rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-fig {
  margin-right: 0.35rem;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 650;
  color: var(--ink);
}

/* ---- sections ------------------------------------------------------------ */

.xp-mercury-to-gold .mg-sec {
  max-width: var(--measure);
  margin: 0 auto;
  padding-top: 4.25rem;
}

.xp-mercury-to-gold .mg-sec h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.85rem, 3.2vw, 2.55rem);
  font-weight: 600;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 96;
  line-height: 1.1;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

.xp-mercury-to-gold .mg-sec h2::before {
  content: "";
  display: block;
  width: 2.75rem;
  height: 5px;
  margin-bottom: 1.1rem;
  border-top: 2px solid var(--gold);
  border-bottom: 1px solid var(--gold);
}

.xp-mercury-to-gold .mg-sub {
  margin: 2.5rem 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 600;
  font-style: italic;
  line-height: 1.25;
}

.xp-mercury-to-gold .mg-lede {
  font-size: 1.28rem;
  line-height: 1.6;
}

.xp-mercury-to-gold #mg-happened + .mg-lede::first-letter {
  float: left;
  margin: 0.08em 0.1em 0 0;
  font-size: 3.9em;
  font-weight: 600;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 144;
  line-height: 0.82;
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-specimen {
  margin: 2rem 0;
  padding: 0 0 0 1.5rem;
  border-left: 3px double var(--gold);
}

.xp-mercury-to-gold .mg-specimen blockquote {
  margin: 0;
}

.xp-mercury-to-gold .mg-specimen blockquote p {
  margin: 0 0 0.75rem;
  font-size: 1.6rem;
  font-style: italic;
  font-weight: 420;
  line-height: 1.35;
  text-wrap: pretty;
}

.xp-mercury-to-gold .mg-specimen figcaption {
  font-family: var(--sans);
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* ---- Fig. 1: the nucleus lab --------------------------------------------- */

.xp-mercury-to-gold .mg-lab {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
  grid-template-areas:
    "stage panel"
    "chart panel"
    "cap cap";
  gap: 1rem 2.25rem;
}

.xp-mercury-to-gold .mg-lab__stage {
  grid-area: stage;
}

.xp-mercury-to-gold .mg-lab__panel {
  grid-area: panel;
}

.xp-mercury-to-gold .mg-lab__chart {
  grid-area: chart;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.xp-mercury-to-gold .mg-lab > figcaption {
  grid-area: cap;
}

.xp-mercury-to-gold .mg-lab__stage {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.xp-mercury-to-gold .mg-lab__svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.xp-mercury-to-gold .mg-lab__svg .mg-nuc {
  stroke: rgba(35, 27, 18, 0.55);
  stroke-width: 0.8;
}

.xp-mercury-to-gold .mg-lab__svg .mg-nuc--p {
  fill: url(#mg-grad-p);
}

.xp-mercury-to-gold .mg-lab__svg .mg-nuc--n {
  fill: url(#mg-grad-n);
}

.xp-mercury-to-gold .mg-lab__svg .mg-fx-label {
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 600;
  fill: var(--ink);
}

.xp-mercury-to-gold .mg-lab__svg .mg-fx-label--soft {
  font-weight: 500;
  fill: var(--ink-soft);
  font-style: italic;
  font-family: var(--serif);
  font-size: 13px;
}

.xp-mercury-to-gold .mg-lab__svg .mg-trail {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.4;
  stroke-dasharray: 3 4;
  opacity: 0.55;
}

.xp-mercury-to-gold .mg-lab__svg .mg-orbit {
  fill: none;
  stroke: var(--silver-ink);
  stroke-width: 1;
  stroke-dasharray: 2 5;
  opacity: 0.7;
}

.xp-mercury-to-gold .mg-lab__svg .mg-electron {
  fill: #2f6f9f;
  stroke: var(--ink);
  stroke-width: 0.8;
}

.xp-mercury-to-gold .mg-lab__svg .mg-flash {
  fill: none;
  stroke: var(--gold);
  stroke-width: 3;
}

.xp-mercury-to-gold .mg-lab__legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.35rem 0.5rem;
  margin: 0.75rem 0 0;
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-key {
  display: inline-block;
  width: 0.8rem;
  height: 0.8rem;
  margin-left: 0.6rem;
  border-radius: 50%;
  border: 1px solid rgba(35, 27, 18, 0.55);
  vertical-align: -0.1rem;
}

.xp-mercury-to-gold .mg-key:first-child {
  margin-left: 0;
}

.xp-mercury-to-gold .mg-key--p {
  background: radial-gradient(circle at 35% 30%, var(--cinnabar-hi), var(--cinnabar));
}

.xp-mercury-to-gold .mg-key--n {
  background: radial-gradient(circle at 35% 30%, #fffaf0, #cdbf9f);
}

.xp-mercury-to-gold .mg-key--e {
  width: 0.55rem;
  height: 0.55rem;
  background: #2f6f9f;
}

.xp-mercury-to-gold .mg-lab__panel {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  min-width: 0;
}

.xp-mercury-to-gold .mg-lab__counts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.xp-mercury-to-gold .mg-count {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0.6rem 0.25rem 0.55rem 0.8rem;
  border-left: 1px solid var(--rule);
}

.xp-mercury-to-gold .mg-count:first-child {
  border-left: 0;
  padding-left: 0;
}

.xp-mercury-to-gold .mg-count__num {
  font-size: 2.35rem;
  font-weight: 560;
  font-variation-settings: "SOFT" 100, "WONK" 0, "opsz" 96;
  font-variant-numeric: tabular-nums lining-nums;
  line-height: 1.05;
  transition: color 0.4s;
}

.xp-mercury-to-gold .mg-count--p .mg-count__num {
  color: var(--cinnabar);
}

.xp-mercury-to-gold .mg-count__label {
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-count__delta {
  position: absolute;
  top: 0.55rem;
  right: 0.35rem;
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  color: var(--cinnabar);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s, transform 0.3s;
}

.xp-mercury-to-gold .mg-count__delta.is-on {
  opacity: 1;
  transform: none;
}

.xp-mercury-to-gold .mg-lab__now {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.xp-mercury-to-gold .mg-mini {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 4.4rem;
  height: 4.4rem;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  background: radial-gradient(120% 90% at 30% 20%, #f4f7f8 0%, var(--silver-hi) 35%, #a9b4ba 100%);
  box-shadow: inset 0 0 0 3px rgba(244, 236, 218, 0.7), 3px 4px 0 rgba(35, 27, 18, 0.12);
  transition: background 0.5s;
}

.xp-mercury-to-gold .mg-mini.is-gold {
  background: radial-gradient(120% 90% at 30% 20%, #fff0bd 0%, var(--gold-hi) 38%, #c08c18 100%);
}

.xp-mercury-to-gold .mg-mini {
  grid-auto-flow: column;
  gap: 0.15rem;
}

.xp-mercury-to-gold .mg-mini__nums {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 650;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
}

.xp-mercury-to-gold .mg-mini__nums span + span {
  margin-top: 0.85rem;
}

.xp-mercury-to-gold .mg-mini__sym {
  font-size: 1.85rem;
  font-weight: 600;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 72;
  line-height: 1;
}

.xp-mercury-to-gold .mg-lab__name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 72;
  line-height: 1.15;
}

.xp-mercury-to-gold .mg-lab__status {
  margin: 0.15rem 0 0;
  font-family: var(--sans);
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-lab__status.is-unstable {
  color: var(--cinnabar);
}

.xp-mercury-to-gold .mg-lab__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  min-height: 11.25rem;
}

.xp-mercury-to-gold .mg-lab__steps li {
  margin: 0 0 1rem;
}

.xp-mercury-to-gold.is-js .mg-lab__steps li {
  display: none;
  margin: 0;
}

.xp-mercury-to-gold.is-js .mg-lab__steps li.is-current {
  display: block;
  animation: xp-mercury-to-gold-fade 0.35s ease-out;
}

.xp-mercury-to-gold .mg-lab__steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-style: italic;
  font-weight: 600;
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-lab__steps p {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.55;
}

@keyframes xp-mercury-to-gold-fade {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

.xp-mercury-to-gold .mg-chart {
  display: block;
  width: 100%;
  max-width: 19rem;
  height: auto;
  color: var(--cinnabar);
}

.xp-mercury-to-gold .mg-chart__axis {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12.5px;
  fill: var(--ink-soft);
}

.xp-mercury-to-gold .mg-chart__tick {
  font-family: var(--sans);
  font-size: 11.5px;
  font-weight: 600;
  fill: var(--ink-soft);
}

.xp-mercury-to-gold .mg-chart__cell rect {
  fill: var(--paper);
  stroke: rgba(35, 27, 18, 0.4);
  stroke-width: 1;
  transition: fill 0.45s, stroke 0.45s;
}

.xp-mercury-to-gold .mg-chart__cell text {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  fill: var(--ink);
}

.xp-mercury-to-gold .mg-chart__cell--off rect {
  fill: transparent;
  stroke-dasharray: 3 3;
}

.xp-mercury-to-gold .mg-chart__cell--off text {
  fill: var(--ink-soft);
  font-weight: 500;
}

.xp-mercury-to-gold .mg-chart__cell.is-visited rect {
  fill: var(--plate-deep);
}

.xp-mercury-to-gold .mg-chart__cell.is-current rect {
  fill: var(--silver-hi);
  stroke: var(--ink);
  stroke-width: 2;
}

.xp-mercury-to-gold .mg-chart__cell.is-current.is-gold rect {
  fill: var(--gold-hi);
}

.xp-mercury-to-gold .mg-chart__path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 80;
  stroke-dashoffset: 80;
  opacity: 0;
  transition: stroke-dashoffset 0.7s ease-out, opacity 0.2s;
}

.xp-mercury-to-gold .mg-chart__path.is-on {
  stroke-dashoffset: 0;
  opacity: 1;
}

.xp-mercury-to-gold .mg-lab__controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.xp-mercury-to-gold .mg-lab__progress {
  flex: 1 1 auto;
  text-align: center;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---- buttons, chips, ranges ---------------------------------------------- */

.xp-mercury-to-gold .mg-btn {
  appearance: none;
  min-height: 2.75rem;
  padding: 0.55rem 1.15rem;
  border: 1.5px solid var(--ink);
  border-radius: 3px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--gold);
  transition: transform 0.12s, box-shadow 0.12s, background 0.2s;
}

.xp-mercury-to-gold .mg-btn:hover {
  background: #3a2d1f;
}

.xp-mercury-to-gold .mg-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--gold);
}

.xp-mercury-to-gold .mg-btn--ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

.xp-mercury-to-gold .mg-btn--ghost:hover {
  background: var(--plate-deep);
}

.xp-mercury-to-gold .mg-btn--ghost:active {
  transform: none;
  box-shadow: none;
}

.xp-mercury-to-gold .mg-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.xp-mercury-to-gold .mg-chip {
  appearance: none;
  min-height: 2.5rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.86rem;
  font-weight: 550;
  cursor: pointer;
}

.xp-mercury-to-gold .mg-chip:hover,
.xp-mercury-to-gold .mg-chip.is-on {
  background: var(--ink);
  color: var(--paper);
}

.xp-mercury-to-gold .mg-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2.25rem;
  margin: 0;
  background: transparent;
  cursor: pointer;
}

.xp-mercury-to-gold .mg-range::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--gold) 0 var(--fill, 0%), rgba(35, 27, 18, 0.28) var(--fill, 0%));
}

.xp-mercury-to-gold .mg-range::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: rgba(35, 27, 18, 0.28);
}

.xp-mercury-to-gold .mg-range::-moz-range-progress {
  height: 4px;
  border-radius: 2px;
  background: var(--gold);
}

.xp-mercury-to-gold .mg-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 1.5rem;
  height: 1.5rem;
  margin-top: calc(2px - 0.75rem);
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff0bd, var(--gold) 70%);
  box-shadow: 2px 2px 0 rgba(35, 27, 18, 0.2);
}

.xp-mercury-to-gold .mg-range::-moz-range-thumb {
  width: 1.3rem;
  height: 1.3rem;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff0bd, var(--gold) 70%);
}

/* ---- Fig. 2: decay ------------------------------------------------------- */

.xp-mercury-to-gold .mg-decay {
  display: grid;
  grid-template-columns: minmax(0, 20rem) minmax(0, 1fr);
  gap: 1.5rem 2.5rem;
  align-items: center;
}

.xp-mercury-to-gold .mg-decay__grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 4px;
}

.xp-mercury-to-gold .mg-atom {
  aspect-ratio: 1;
  border: 1px solid rgba(35, 27, 18, 0.45);
  border-radius: 2px;
  background: radial-gradient(circle at 30% 25%, #f4f7f8, var(--silver) 90%);
  transition: background 0.35s, transform 0.35s;
}

.xp-mercury-to-gold .mg-atom.is-gold {
  background: radial-gradient(circle at 30% 25%, #fff0bd, var(--gold) 85%);
  border-color: rgba(125, 83, 0, 0.7);
}

.xp-mercury-to-gold .mg-decay__readout {
  min-height: 3.4em;
  margin: 0 0 1rem;
  font-size: 1.3rem;
  line-height: 1.4;
  font-variant-numeric: lining-nums;
}

.xp-mercury-to-gold .mg-decay__readout b {
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-decay__label,
.xp-mercury-to-gold .mg-scale__label {
  display: block;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-decay__ticks {
  display: flex;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-decay__play {
  margin-top: 1rem;
}

/* ---- ten times what ------------------------------------------------------ */

.xp-mercury-to-gold .mg-readings {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 1.75rem 0 1.75rem;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.xp-mercury-to-gold .mg-reading {
  padding: 1.1rem 1.4rem 0.4rem 0;
}

.xp-mercury-to-gold .mg-reading + .mg-reading {
  padding-left: 1.4rem;
  padding-right: 0;
  border-left: 1px solid var(--rule);
}

.xp-mercury-to-gold .mg-reading h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  font-style: italic;
  font-weight: 600;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-reading p.mg-reading__big {
  margin: 0 0 0.6rem;
  font-size: 2.6rem;
  font-weight: 560;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 144;
  line-height: 1.05;
  color: var(--cinnabar);
}

.xp-mercury-to-gold .mg-reading__big span {
  font-size: 1.05rem;
  font-weight: 500;
  font-style: italic;
  color: var(--ink);
}

.xp-mercury-to-gold .mg-reading p {
  font-size: 1rem;
  line-height: 1.55;
}

/* ---- Fig. 3: scale ------------------------------------------------------- */

.xp-mercury-to-gold .mg-scale {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 1.5rem 3rem;
}

.xp-mercury-to-gold .mg-scale__gw {
  display: block;
  margin: 0.15rem 0 0.25rem;
  font-size: 2.6rem;
  font-weight: 560;
  font-variation-settings: "SOFT" 100, "WONK" 1, "opsz" 144;
  font-variant-numeric: lining-nums;
  line-height: 1.1;
}

.xp-mercury-to-gold .mg-scale__presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.xp-mercury-to-gold .mg-scale__out {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-self: center;
  margin: 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.xp-mercury-to-gold .mg-scale__out div {
  padding: 0.75rem 0.5rem 0.75rem 1rem;
  border-left: 1px solid var(--rule);
}

.xp-mercury-to-gold .mg-scale__out div:first-child {
  border-left: 0;
  padding-left: 0;
}

.xp-mercury-to-gold .mg-scale__out dt {
  font-family: var(--sans);
  font-size: 0.8rem;
  line-height: 1.3;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-scale__out dd {
  margin: 0.3rem 0 0;
  font-size: 1.55rem;
  font-weight: 580;
  font-variation-settings: "SOFT" 100, "WONK" 0, "opsz" 72;
  font-variant-numeric: lining-nums tabular-nums;
  line-height: 1.15;
}

.xp-mercury-to-gold .mg-ladder {
  grid-column: 1 / -1;
  margin-top: 0.5rem;
}

.xp-mercury-to-gold .mg-ladder__axis {
  position: relative;
  height: 1.4rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-ladder__axis span {
  position: absolute;
  left: calc(var(--x) * 1%);
  white-space: nowrap;
}

.xp-mercury-to-gold .mg-ladder__rows {
  margin: 0;
  padding: 0.35rem 0;
  list-style: none;
  background-image: linear-gradient(to right, rgba(35, 27, 18, 0.2) 1px, transparent 1px);
  background-size: 13.0435% 100%;
  border-left: 1px solid rgba(35, 27, 18, 0.45);
}

.xp-mercury-to-gold .mg-ladder__rows li {
  padding: 0.3rem 0;
}

.xp-mercury-to-gold .mg-ladder__bar {
  display: block;
  width: calc(var(--w) * 1%);
  height: 0.7rem;
  background: var(--ink);
  border-radius: 0 2px 2px 0;
  transition: width 0.25s ease-out;
}

.xp-mercury-to-gold .mg-ladder__rows li.is-claim .mg-ladder__bar {
  background: repeating-linear-gradient(135deg, var(--cinnabar) 0 3px, transparent 3px 6px);
  border: 1px solid var(--cinnabar);
}

.xp-mercury-to-gold .mg-ladder__rows li.is-proj .mg-ladder__bar {
  background: repeating-linear-gradient(135deg, var(--gold-ink) 0 3px, transparent 3px 6px);
  border: 1px solid var(--gold-ink);
}

.xp-mercury-to-gold .mg-ladder__rows li.is-you {
  margin-top: 0.35rem;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(35, 27, 18, 0.4);
}

.xp-mercury-to-gold .mg-ladder__rows li.is-you .mg-ladder__bar {
  height: 0.9rem;
  background: linear-gradient(to bottom, var(--gold-hi), var(--gold));
  border: 1.5px solid var(--ink);
}

.xp-mercury-to-gold .mg-ladder__txt {
  display: block;
  margin-top: 0.2rem;
  padding-left: 0.5rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  line-height: 1.35;
}

.xp-mercury-to-gold .mg-ladder__txt b {
  display: inline-block;
  min-width: 5.2rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.xp-mercury-to-gold .mg-ladder__note {
  margin: 0.75rem 0 0;
  font-family: var(--sans);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

/* ---- checks, reactions, timeline ----------------------------------------- */

.xp-mercury-to-gold .mg-checks {
  margin: 0 0 1.2em;
  padding: 0;
  list-style: none;
}

.xp-mercury-to-gold .mg-checks li {
  position: relative;
  margin: 0 0 0.7rem;
  padding-left: 2rem;
}

.xp-mercury-to-gold .mg-checks li::before {
  content: "";
  position: absolute;
  left: 0.15rem;
  top: 0.5em;
  width: 0.95rem;
  height: 0.55rem;
  border-left: 2.5px solid var(--gold-ink);
  border-bottom: 2.5px solid var(--gold-ink);
  transform: rotate(-45deg);
}

.xp-mercury-to-gold .mg-letters {
  display: grid;
  gap: 1.5rem;
  width: min(var(--wide), calc(100vw - 2.5rem));
  margin-left: calc(50% - min(var(--wide), calc(100vw - 2.5rem)) / 2);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.xp-mercury-to-gold .mg-letter {
  position: relative;
  margin: 0;
  padding: 1.5rem 1.75rem 1.4rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px double var(--ink);
}

.xp-mercury-to-gold .mg-letter blockquote {
  margin: 0.6rem 0 1rem;
}

.xp-mercury-to-gold .mg-letter blockquote p {
  margin: 0;
  font-size: 1.35rem;
  font-style: italic;
  line-height: 1.4;
}

.xp-mercury-to-gold .mg-letter__who {
  display: block;
  font-weight: 650;
  font-size: 1.05rem;
}

.xp-mercury-to-gold .mg-letter__role {
  display: block;
  margin-top: 0.15rem;
  font-family: var(--sans);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--ink-soft);
}

.xp-mercury-to-gold .mg-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.xp-mercury-to-gold .mg-timeline::before {
  content: "";
  position: absolute;
  top: 0.6rem;
  bottom: 0.6rem;
  left: 9.6rem;
  width: 1px;
  background: var(--rule);
}

.xp-mercury-to-gold .mg-timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.25rem;
  padding: 0 0 1.25rem;
}

.xp-mercury-to-gold .mg-timeline li::before {
  content: "";
  position: absolute;
  left: calc(9.6rem - 5px);
  top: 0.55em;
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--gold-ink);
  border-radius: 50%;
  background: var(--paper);
}

.xp-mercury-to-gold .mg-timeline li:last-child::before {
  background: var(--gold);
}

.xp-mercury-to-gold .mg-timeline__date {
  font-style: italic;
  font-weight: 600;
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--gold-ink);
  text-align: right;
}

.xp-mercury-to-gold .mg-timeline p {
  margin: 0;
  padding-left: 0.6rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* ---- questions, updates, sources ----------------------------------------- */

.xp-mercury-to-gold .mg-faq {
  border-top: 2px solid var(--ink);
}

.xp-mercury-to-gold .mg-faq details {
  border-bottom: 1px solid var(--rule);
}

.xp-mercury-to-gold .mg-faq summary {
  position: relative;
  padding: 1rem 2.5rem 1rem 0;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
}

.xp-mercury-to-gold .mg-faq summary::-webkit-details-marker {
  display: none;
}

.xp-mercury-to-gold .mg-faq summary::after {
  content: "";
  position: absolute;
  right: 0.4rem;
  top: 50%;
  width: 0.7rem;
  height: 0.7rem;
  margin-top: -0.5rem;
  border-right: 2px solid var(--gold-ink);
  border-bottom: 2px solid var(--gold-ink);
  transform: rotate(45deg);
  transition: transform 0.2s;
}

.xp-mercury-to-gold .mg-faq details[open] summary::after {
  transform: rotate(225deg);
  margin-top: -0.15rem;
}

.xp-mercury-to-gold .mg-faq details p {
  margin: 0 0 1.2rem;
  font-size: 1.08rem;
}

.xp-mercury-to-gold .mg-updates {
  margin: 0;
  padding: 0;
  list-style: none;
}

.xp-mercury-to-gold .mg-updates time {
  display: block;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--gold-ink);
}

.xp-mercury-to-gold .mg-updates p {
  margin: 0.15rem 0 0;
}

.xp-mercury-to-gold .mg-sources ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.xp-mercury-to-gold .mg-sources li {
  margin: 0 0 0.6rem;
  padding-left: 1.1rem;
  text-indent: -1.1rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  line-height: 1.55;
}

.xp-mercury-to-gold .mg-sources li::before {
  content: "";
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  margin-right: 0.65rem;
  border: 1.5px solid var(--gold-ink);
  border-radius: 50%;
  vertical-align: 0.1rem;
}

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

@media (max-width: 960px) {
  .xp-mercury-to-gold .mg-hero {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "text"
      "tiles"
      "short";
    gap: 2.25rem;
  }

  .xp-mercury-to-gold .mg-lab,
  .xp-mercury-to-gold .mg-scale {
    grid-template-columns: minmax(0, 1fr);
  }

  .xp-mercury-to-gold .mg-lab {
    grid-template-areas:
      "stage"
      "panel"
      "chart"
      "cap";
  }

  .xp-mercury-to-gold .mg-lab__stage {
    max-width: 30rem;
    width: 100%;
    margin: 0 auto;
  }
}

@media (max-width: 680px) {
  .xp-mercury-to-gold {
    font-size: 1.08rem;
  }

  .xp-mercury-to-gold .mg-hero {
    margin-top: 1.25rem;
  }

  .xp-mercury-to-gold .mg-title {
    font-size: 2.35rem;
    line-height: 1.05;
  }

  .xp-mercury-to-gold .mg-dek,
  .xp-mercury-to-gold .mg-lede {
    font-size: 1.15rem;
  }

  .xp-mercury-to-gold .mg-short {
    padding: 1.3rem 1.25rem 0.8rem;
  }

  .xp-mercury-to-gold .mg-short p {
    column-count: 1;
    font-size: 1.1rem;
  }

  .xp-mercury-to-gold .mg-tile {
    width: 7.25rem;
  }

  .xp-mercury-to-gold .mg-tile__sym {
    font-size: 2.7rem;
    margin-top: -0.75rem;
  }

  .xp-mercury-to-gold .mg-tile__name {
    bottom: 0.55rem;
    font-size: 0.78rem;
  }

  .xp-mercury-to-gold .mg-lab__svg .mg-fx-label {
    font-size: 17px;
  }

  .xp-mercury-to-gold .mg-lab__svg .mg-fx-label--soft {
    font-size: 17px;
  }

  .xp-mercury-to-gold .mg-lab__steps {
    min-height: 13rem;
  }

  .xp-mercury-to-gold .mg-sec {
    padding-top: 3.25rem;
  }

  .xp-mercury-to-gold .mg-sec .mg-plate {
    padding: 1.25rem 1rem 1rem;
  }

  .xp-mercury-to-gold .mg-specimen blockquote p {
    font-size: 1.3rem;
  }

  .xp-mercury-to-gold .mg-count__num {
    font-size: 1.9rem;
  }

  .xp-mercury-to-gold .mg-decay {
    grid-template-columns: minmax(0, 1fr);
  }

  .xp-mercury-to-gold .mg-decay__readout {
    font-size: 1.12rem;
    min-height: 0;
  }

  .xp-mercury-to-gold .mg-readings {
    grid-template-columns: minmax(0, 1fr);
  }

  .xp-mercury-to-gold .mg-reading,
  .xp-mercury-to-gold .mg-reading + .mg-reading {
    padding: 1rem 0 0.3rem;
    border-left: 0;
  }

  .xp-mercury-to-gold .mg-reading + .mg-reading {
    border-top: 1px solid var(--rule);
  }

  .xp-mercury-to-gold .mg-scale__gw {
    font-size: 2.1rem;
  }

  .xp-mercury-to-gold .mg-scale__out {
    grid-template-columns: minmax(0, 1fr);
  }

  .xp-mercury-to-gold .mg-scale__out div,
  .xp-mercury-to-gold .mg-scale__out div:first-child {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    padding: 0.55rem 0;
    border-left: 0;
    border-top: 1px solid var(--rule);
  }

  .xp-mercury-to-gold .mg-scale__out div:first-child {
    border-top: 0;
  }

  .xp-mercury-to-gold .mg-scale__out dd {
    margin: 0;
    font-size: 1.3rem;
    text-align: right;
  }

  .xp-mercury-to-gold .mg-ladder__axis span:nth-child(2n) {
    display: none;
  }

  .xp-mercury-to-gold .mg-ladder__txt b {
    display: block;
    min-width: 0;
  }

  .xp-mercury-to-gold .mg-letters {
    grid-template-columns: minmax(0, 1fr);
  }

  .xp-mercury-to-gold .mg-letter blockquote p {
    font-size: 1.2rem;
  }

  .xp-mercury-to-gold .mg-timeline::before {
    left: 0.3rem;
  }

  .xp-mercury-to-gold .mg-timeline li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.1rem;
    padding-left: 1.6rem;
  }

  .xp-mercury-to-gold .mg-timeline li::before {
    left: calc(0.3rem - 4.5px);
  }

  .xp-mercury-to-gold .mg-timeline__date {
    text-align: left;
  }

  .xp-mercury-to-gold .mg-timeline p {
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .xp-mercury-to-gold *,
  .xp-mercury-to-gold *::before,
  .xp-mercury-to-gold *::after {
    animation: none !important;
    transition: none !important;
  }
}