/* Spin and statistics: the page for one paradox of one manuscript and what it means. The institute's screen style: warm paper
   and ink, Inter at two sizes, small mono labels. Colour carries one meaning in the figures: cyan is a plus value, magenta a minus
   value, red what is owed. On the page cyan also marks links. */
body.ss-body[data-rpi-page] {
  --ss-paper: #faf8f3; --ss-ink: #1d1d1b; --ss-body: #2a2926; --ss-soft: #3c3a36; --ss-hair: #8a8a8a;
  --ss-cyan: #009fe3; --ss-magenta: #e6007e; --ss-cyan-text: #0072b5; --ss-magenta-text: #c4006b;
  --ss-proved: #0b7a3e; --ss-rs: #ffc328; --ss-work: #8a5a00; --ss-open: #c8401f;
  --ss-rule: color-mix(in srgb, var(--ss-ink) 16%, var(--ss-paper));
  --ss-tint: color-mix(in srgb, var(--ss-ink) 4%, var(--ss-paper));
  --ss-display: "Inter Display", "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --ss-text: "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --ss-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--ss-paper); color: var(--ss-body);
}
@media screen and (prefers-color-scheme: dark) {
  body.ss-body[data-rpi-page] {
    --ss-paper: #141413; --ss-ink: #faf8f3; --ss-body: #e9e6df; --ss-soft: #c9c5bc;
    --ss-cyan: #2bb3f0; --ss-magenta: #ff3d9e; --ss-cyan-text: #2bb3f0; --ss-magenta-text: #ff6fb5;
    --ss-proved: #3fb871; --ss-work: #e0a43a; --ss-open: #ff6a3d;
  }
}
.ss-page { width: min(calc(100% - 4rem), 75rem); margin: 0 auto; padding: 0 0 5rem;
  font-family: var(--ss-text); font-weight: 420; line-height: 1.42; font-optical-sizing: auto; }
.ss-page a { color: var(--ss-ink); text-decoration-color: var(--ss-cyan); text-decoration-thickness: 2px; text-underline-offset: .18em; }
.ss-page a:hover { color: var(--ss-cyan-text); }
.ss-page i, .ss-page em { font-style: italic; }
.ss-page sub:not([data-ss-fig] *), .ss-page sup:not([data-ss-fig] *) { font-size: .72em; line-height: 0; }
.ss-page b, .ss-page strong { color: var(--ss-ink); font-weight: 650; }
.ss-page :focus-visible { outline: 3px solid var(--ss-cyan-text); outline-offset: 3px; }
.ss-label { margin: 0 0 1rem; font: 700 .75rem/1.3 var(--ss-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ss-soft); }
.ss-label a { color: inherit; text-decoration: none; }
.ss-label a:hover { text-decoration: underline; color: inherit; }
.ss-nw { white-space: nowrap; }
/* Large text on a narrow screen: let long formulas wrap (rem follows the reader's font size). */
@media (max-width: 22rem) { .ss-nw { white-space: normal; } }
.ss-v { font-style: italic; font-family: var(--ss-text); }
html:has(> body.ss-body[data-rpi-page]) { scroll-padding-top: 6rem; }
body.ss-body[data-rpi-page] > .skip { position: absolute; left: -9999px; }
body.ss-body[data-rpi-page] > .skip:focus { left: 1rem; top: 1rem; z-index: 100; padding: .5rem .8rem; background: var(--ss-ink); color: var(--ss-paper); }

/* Opening: the sentence, the picture working, the number */
.ss-opening { padding: clamp(1rem, 2vw, 1.5rem) 0 clamp(2rem, 4vw, 3rem); border-bottom: 1px solid var(--ss-ink); }
.ss-opening > .ss-label { margin-bottom: .75rem; }
.ss-opening-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: clamp(1.5rem, 4vw, 4rem); align-items: start; }
body.ss-body .ss-opening h1 { margin: 0; font-family: var(--ss-display); font-weight: 820;
  font-size: clamp(2.3rem, 3.9vw, 3.55rem); line-height: .94; letter-spacing: -.038em; color: var(--ss-ink); text-wrap: balance;
  text-shadow: 0 0 .5px color-mix(in srgb, var(--ss-ink) 55%, transparent); overflow-wrap: break-word; }
.ss-lede { max-width: 38rem; margin: 0; font-size: clamp(1.08rem, 1.4vw, 1.27rem); font-weight: 450; line-height: 1.32;
  letter-spacing: -.008em; color: var(--ss-ink); }
.ss-hero { margin: clamp(1.25rem, 2.4vw, 1.9rem) 0 0; }
.ss-hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .85fr) 15.5rem; grid-template-areas: "ring swap num";
  column-gap: clamp(1.5rem, 3vw, 2.75rem); align-items: start; }
.ss-hero-part--ring { grid-area: ring; }
.ss-hero-part--swap { grid-area: swap; }
.ss-hero-grid > .ss-num { grid-area: num; }
.ss-hero-fig { min-width: 0; }
.ss-hero figcaption { max-width: 52rem; margin-top: .9rem; font-size: .9rem; line-height: 1.42; color: var(--ss-soft); }
.ss-noscript { max-width: 46rem; padding: 1rem; border: 1px solid var(--ss-rule); }
.ss-num { border-left: 2px solid var(--ss-ink); padding: .1rem 0 .2rem 1.1rem; }
.ss-num .ss-label { margin-bottom: .55rem; }
.ss-num-big { margin: 0 0 .6rem; font-family: var(--ss-display); font-weight: 860; font-size: clamp(2.1rem, 3vw, 2.7rem); line-height: .9;
  letter-spacing: -.045em; color: var(--ss-ink); font-variant-numeric: tabular-nums lining-nums; white-space: nowrap; }
.ss-num-big i { font-style: italic; font-weight: 800; letter-spacing: -.02em; }
.ss-num-cap { margin: 0 0 .7rem; font-size: .9rem; line-height: 1.4; color: var(--ss-body); }
.ss-num-meas { margin: 0 0 .7rem; font: 700 .72rem/1.45 var(--ss-mono); letter-spacing: .06em; color: var(--ss-soft); }
.ss-num-meas b { font-size: 1.05rem; letter-spacing: -.01em; }

.ss-status { max-width: 38rem; margin: .7rem 0 0; font-size: .86rem; line-height: 1.4; color: var(--ss-soft); }
/* Below the paper band: the paradox in three lines, the paper's own three lines in plain words */
.ss-three { margin-top: clamp(1.75rem, 3.5vw, 2.5rem); }
.ss-three > .ss-label { margin-bottom: .8rem; }
.ss-three-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: clamp(1.25rem, 2.6vw, 2.25rem); border-top: 2px solid var(--ss-ink); }
.ss-three-list li { margin: 0; padding: .9rem 0 0; min-width: 0; }
.ss-three-list li p { margin: 0; font-size: 1rem; line-height: 1.45; color: var(--ss-body); }
.ss-three-list li p.ss-three-head { margin: 0 0 .45rem; font-family: var(--ss-display); font-weight: 780; font-size: 1.15rem; line-height: 1.1;
  letter-spacing: -.018em; color: var(--ss-ink); }
.ss-three-list li p.ss-three-head::before { display: block; margin-bottom: .35rem; font: 700 .72rem/1 var(--ss-mono); letter-spacing: .12em; color: var(--ss-soft); }
.ss-three-list li:nth-child(1) p.ss-three-head::before { content: "1"; }
.ss-three-list li:nth-child(2) p.ss-three-head::before { content: "2"; }
.ss-three-list li:nth-child(3) p.ss-three-head::before { content: "3"; }

/* Status marks, placed where each premise and owed statement enters */
.ss-st { display: inline-block; margin: 0 .1rem; padding: .05rem .4rem .08rem; border: 1.5px solid currentColor; font: 700 .64rem/1.45 var(--ss-mono);
  letter-spacing: .08em; text-transform: uppercase; vertical-align: .12em; white-space: nowrap; }
@media (max-width: 22rem) { .ss-st { white-space: normal; } }
.ss-st i { font-style: italic; text-transform: none; letter-spacing: .02em; }
.ss-st--proved { color: var(--ss-proved); }
.ss-st--premise { color: var(--ss-work); }
.ss-st--owed { color: var(--ss-open); }
.ss-st--given { color: var(--ss-soft); }
.ss-key { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.2rem 0 0; }
.ss-key .ss-st { margin: 0; }
.ss-key-note { flex-basis: 100%; margin-top: .2rem; font-size: .8rem; line-height: 1.4; color: var(--ss-soft); }
.ss-key-h { flex-basis: 100%; font: 700 .68rem/1.3 var(--ss-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ss-soft); }
.ss-st-code { font-family: var(--ss-text); font-weight: 700; letter-spacing: 0; text-transform: none; }

/* Sections */
.ss-section { display: grid; grid-template-columns: minmax(0, 17rem) minmax(0, 1fr); column-gap: clamp(1.5rem, 4vw, 4rem);
  padding: clamp(2.5rem, 5vw, 4rem) 0; border-bottom: 1px solid var(--ss-rule); }
.ss-head { min-width: 0; }
body.ss-body .ss-section h2, body.ss-body .ss-meaning h2 { margin: 0; font-family: var(--ss-display); font-weight: 820;
  font-size: clamp(1.65rem, 2.5vw, 2.3rem); line-height: 1; letter-spacing: -.034em; color: var(--ss-ink); text-wrap: balance; overflow-wrap: break-word; }
.ss-copy { min-width: 0; max-width: 44rem; font-size: 1.06rem; }
.ss-copy > p { margin: 0 0 1rem; }
.ss-copy > p:last-child { margin-bottom: 0; }
.ss-copy h3 { margin: 2rem 0 .6rem; font-family: var(--ss-display); font-weight: 780; font-size: 1.28rem; line-height: 1.1; letter-spacing: -.02em; color: var(--ss-ink); }
.ss-copy h3:first-child { margin-top: 0; }
.ss-eq { margin: 1.1rem 0 1.2rem; padding: .7rem 1rem; border-left: 2px solid var(--ss-cyan); background: var(--ss-tint);
  font-size: 1.08rem; color: var(--ss-ink); overflow-x: auto; }
.ss-eq-note { display: block; margin-top: .3rem; font-size: .88rem; color: var(--ss-soft); }
.ss-tag { font: 700 .7rem/1 var(--ss-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ss-soft); white-space: nowrap; }
.ss-wide { grid-column: 1 / -1; min-width: 0; }

/* The proofs in full, folded under the plain account */
.ss-full { margin: 1.4rem 0 .4rem; border-top: 1px solid var(--ss-rule); border-bottom: 1px solid var(--ss-rule); }
.ss-full summary { cursor: pointer; padding: .75rem 0; font-weight: 650; color: var(--ss-ink); list-style-position: inside; }
.ss-full summary:hover { color: var(--ss-cyan-text); }
.ss-full-label { margin-right: .6rem; font: 700 .7rem/1 var(--ss-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ss-soft); }
.ss-full-body { padding: 0 0 .6rem; font-size: .98rem; }
.ss-full-body p { margin: 0 0 .85rem; }

/* History: a timeline */
.ss-time { list-style: none; margin: 1.4rem 0 0; padding: 0; border-left: 2px solid var(--ss-ink); }
.ss-time li { position: relative; display: grid; grid-template-columns: 6.2rem minmax(0, 1fr); column-gap: 1rem; margin: 0; padding: .55rem 0 .9rem 1.1rem; }
.ss-time li::before { content: ""; position: absolute; left: -6px; top: .95rem; width: 10px; height: 10px; background: var(--ss-paper); border: 2px solid var(--ss-ink); }
.ss-time li.ss-time-turn::before { background: var(--ss-ink); }
.ss-time-year { font: 700 .82rem/1.6 var(--ss-mono); letter-spacing: .06em; color: var(--ss-ink); }
.ss-time p { margin: 0; }
.ss-time p + p { margin-top: .35rem; }
.ss-time .ss-src { font-size: .86rem; color: var(--ss-soft); }

/* The live figures: the page's box frames them; their notes say how to use them */
.ss-figure { margin: 1.6rem 0; padding: clamp(1rem, 2vw, 1.6rem); border: 1px solid var(--ss-rule); min-width: 0; }
.ss-figure figcaption { max-width: 52rem; margin-top: 1rem; padding-top: .8rem; border-top: 1px solid var(--ss-rule); font-size: .9rem; line-height: 1.42; color: var(--ss-soft); }
.ss-figure figcaption b, .ss-summary figcaption b, .ss-hero figcaption b { color: var(--ss-ink); }
.ss-copy--more { grid-column: 2; }
.ss-summary { margin: clamp(1.5rem, 3vw, 2.2rem) 0 0; padding-top: 1.2rem; border-top: 1px solid var(--ss-rule); min-width: 0; }
.ss-summary figcaption { max-width: 52rem; margin-top: .8rem; font-size: .9rem; line-height: 1.42; color: var(--ss-soft); }

/* Break it */

/* What it means */
.ss-meaning { padding: clamp(2.5rem, 5vw, 4rem) 0 0; }
.ss-meaning-head { display: grid; grid-template-columns: minmax(0, 17rem) minmax(0, 1fr); column-gap: clamp(1.5rem, 4vw, 4rem); }
.ss-meaning-lede { max-width: 44rem; margin: 0 0 1rem; font-size: 1.16rem; line-height: 1.4; color: var(--ss-ink); }
.ss-meaning-sub { max-width: 44rem; margin: 0; font-size: 1.02rem; color: var(--ss-body); }
.ss-truths { display: grid; gap: 0; margin-top: clamp(1.75rem, 3.5vw, 2.5rem); border-top: 2px solid var(--ss-ink); }
.ss-truth { display: grid; grid-template-columns: minmax(0, 17rem) minmax(0, 1fr); column-gap: clamp(1.5rem, 4vw, 4rem); padding: 1.5rem 0; border-bottom: 1px solid var(--ss-rule); }
.ss-truth-num { margin: 0 0 .45rem; font: 700 .72rem/1.4 var(--ss-mono); letter-spacing: .12em; color: var(--ss-soft); }
.ss-truth h3 { margin: 0; font-family: var(--ss-display); font-weight: 780; font-size: clamp(1.25rem, 1.9vw, 1.55rem); line-height: 1.06; letter-spacing: -.024em; color: var(--ss-ink); text-wrap: balance; }
.ss-truth-body { max-width: 44rem; font-size: 1.04rem; }
.ss-truth-body p { margin: 0 0 .8rem; }
.ss-truth-body p:last-child { margin-bottom: 0; }
.ss-truth-rests { font-size: .88rem; color: var(--ss-soft); }
.ss-truth-rests .ss-tag { margin-right: .2rem; }

/* Hard questions */
.ss-hard dl { margin: 0; }
.ss-hard dt { margin: 0 0 .4rem; font-family: var(--ss-display); font-weight: 780; font-size: 1.2rem; line-height: 1.15; letter-spacing: -.018em; color: var(--ss-ink); }
.ss-hard dd { margin: 0 0 1.6rem; }
.ss-hard dd:last-child { margin-bottom: 0; }

/* Not claimed */
.ss-not { list-style: none; margin: 0; padding: 0; }
.ss-not li { position: relative; padding: .6rem 0 .6rem 1.6rem; border-top: 1px solid var(--ss-rule); }
.ss-not li:last-child { border-bottom: 1px solid var(--ss-rule); }
.ss-not li::before { content: ""; position: absolute; left: 0; top: 1.15rem; width: .8rem; height: 2px; background: var(--ss-open); }

/* Read it */
.ss-paper-cite { margin: 0 0 1.2rem; padding: 1rem 1.1rem; border: 1.5px solid var(--ss-ink); }
.ss-paper-cite p { margin: 0; }
.ss-paper-cite .ss-paper-title { font-family: var(--ss-display); font-weight: 780; font-size: 1.2rem; line-height: 1.15; letter-spacing: -.018em; color: var(--ss-ink); }
.ss-paper-cite .ss-paper-meta { margin-top: .4rem; font-size: .95rem; color: var(--ss-soft); }
.ss-vor { margin: .9rem 0 0; padding-top: .8rem; border-top: 1px solid var(--ss-rule); font-size: .95rem; }
.ss-refs { margin: 1.2rem 0 0; padding-left: 1.3rem; font-size: .92rem; color: var(--ss-body); }
.ss-refs li { margin: 0 0 .45rem; padding-left: .2rem; }
.ss-set { margin-top: clamp(2.5rem, 5vw, 3.5rem); padding-top: 1.1rem; border-top: 2px solid var(--ss-ink); }
.ss-set-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 1.5rem; }
.ss-set-list li { margin: 0; border-bottom: 1px solid var(--ss-rule); }
.ss-set-list li > a, .ss-set-list li.ss-set-here, .ss-set-list li.ss-set-soon { display: grid; grid-template-columns: 2rem minmax(0, 1fr); padding: .55rem 0; font-size: .95rem; line-height: 1.3; text-decoration: none; }
.ss-set-list li > a { color: var(--ss-ink); }
.ss-set-list li > a span:last-child { text-decoration: underline; text-decoration-color: var(--ss-cyan); text-decoration-thickness: 2px; text-underline-offset: .18em; }
.ss-set-list li > a:hover span:last-child { color: var(--ss-cyan-text); }
.ss-section:has(+ .ss-set) { border-bottom: 0; }
.ss-set-n { font: 700 .72rem/1.85 var(--ss-mono); letter-spacing: .08em; color: var(--ss-soft); }
.ss-set-here { color: var(--ss-ink); font-weight: 650; }
.ss-set-here i { font-style: normal; font-weight: 420; color: var(--ss-soft); }
.ss-set-soon { color: var(--ss-soft); }
.ss-set-up { margin: 1rem 0 0; font: 700 .75rem/1.4 var(--ss-mono); letter-spacing: .1em; text-transform: uppercase; }
.ss-set-up a { text-decoration: none; border-bottom: 2px solid var(--ss-cyan); }
.ss-next { display: flex; flex-wrap: wrap; gap: .6rem 1.6rem; padding: 2rem 0 0; font: 700 .75rem/1.4 var(--ss-mono); letter-spacing: .1em; text-transform: uppercase; }
.ss-next a { text-decoration: none; border-bottom: 2px solid var(--ss-cyan); }

/* Additions for this page */
.ss-page .ss-unres { color: var(--ss-open); font-weight: 780; }
.ss-num-live { margin: 0 0 .7rem; padding: .35rem .55rem; border: 1px solid var(--ss-rule); font: 700 .74rem/1.4 var(--ss-mono); letter-spacing: .04em; color: var(--ss-ink); background: var(--ss-tint); }
.ss-st--work { color: var(--ss-work); }
.ss-quote { margin: .7rem 0 .2rem; padding: .7rem 0 .7rem 1rem; border-left: 3px solid var(--ss-ink); }
.ss-quote p { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: 1.08rem; line-height: 1.45; color: var(--ss-ink); }
.ss-quote footer { margin-top: .45rem; font-size: .84rem; color: var(--ss-soft); }

/* The opening figure's slots: the ring, its key, and the swap */
.ss-hero-part { min-width: 0; }
.ss-hero-ringbox { max-width: 23rem; margin: 0 auto; }
.ss-hero-part--swap > div { max-width: 17rem; margin: 0 auto; }
.ss-hero-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: .3rem 1.1rem; margin: .5rem 0 0; font-size: .82rem; color: var(--ss-body); }
.ss-lg::before { content: ""; display: inline-block; width: 1.1rem; height: 0; margin-right: .4rem; vertical-align: .28em; border-top: 4px solid var(--ss-ink); }
.ss-lg--neg::before { border-top-color: var(--ss-magenta); }
.ss-lg--start::before { border-top: 1.5px dashed var(--ss-ink); opacity: .7; }
.ss-q-owed { margin: .35rem 0 0; font: 700 .7rem/1.3 var(--ss-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ss-open); text-align: center; }

/* Narrow screens */
@media (max-width: 960px) {
  .ss-hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); grid-template-areas: "ring swap" "num num"; row-gap: 1.4rem; }
  .ss-num { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 1.2rem; align-items: start; }
  .ss-num .ss-label { grid-column: 1 / -1; }
  .ss-num-big { margin: 0; grid-row: 2 / span 3; align-self: start; }
  .ss-num-live, .ss-num-meas, .ss-num-cap { grid-column: 2; }
  .ss-num-meas { margin: 0 0 .4rem; }
}
@media (max-width: 860px) {
  .ss-page { width: min(calc(100% - 2.5rem), 75rem); }
  .ss-opening-top, .ss-section, .ss-meaning-head, .ss-truth, .ss-three-list { grid-template-columns: minmax(0, 1fr); }
  .ss-set-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ss-three-list li + li { margin-top: .4rem; border-top: 1px solid var(--ss-rule); }
  .ss-opening-top { row-gap: .9rem; }
  .ss-head { margin-bottom: 1.2rem; }
  .ss-copy--more { grid-column: 1; }
  .ss-truth-head { margin-bottom: .8rem; }
  .ss-meaning-head .ss-head { margin-bottom: 1rem; }
}
@media (max-width: 560px) {
  .ss-page { width: calc(100% - 2rem); }
  body.ss-body .ss-opening h1 { font-size: clamp(1.7rem, 7.6vw, 2.1rem); }
  .ss-lede { font-size: .98rem; line-height: 1.3; }
  .ss-hero { margin-top: .9rem; }
  /* Phone: the number and its live count first, then the ring, the number's note, and the swap */
  .ss-hero-grid { grid-template-columns: auto minmax(0, 1fr); grid-template-areas: "nl nl" "nb nv" "ring ring" "nc nc" "nm nm" "swap swap"; column-gap: 1rem; row-gap: 0; }
  .ss-hero-grid > .ss-num { display: contents; }
  .ss-num .ss-label { grid-area: nl; margin: 0 0 .2rem; }
  .ss-num-big { grid-area: nb; margin: 0; font-size: 1.9rem; align-self: center; }
  .ss-num-live { grid-area: nv; margin: 0; align-self: center; font-size: .68rem; }
  .ss-hero-part--ring { margin-top: .9rem; }
  .ss-num-cap { grid-area: nc; margin: 1rem 0 .4rem; font-size: .86rem; }
  .ss-num-meas { grid-area: nm; font-size: .66rem; margin: 0 0 1rem; }
  .ss-hero-ringbox { max-width: 21.5rem; }
  .ss-hero-legend { font-size: .76rem; }
  .ss-hero-part--swap > div { max-width: 15rem; }
  .ss-hero figcaption { font-size: .86rem; }
  .ss-time li { grid-template-columns: minmax(0, 1fr); row-gap: .15rem; }
  .ss-copy { font-size: 1.02rem; }
  .ss-set-list { grid-template-columns: minmax(0, 1fr); }
  .ss-status { font-size: .8rem; }
}

@media (prefers-reduced-motion: reduce) {
  .ss-page * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}
@media (forced-colors: active) {
  .ss-time li::before { forced-color-adjust: none; border-color: CanvasText; background: Canvas; }
  .ss-st { border-color: CanvasText; color: CanvasText; }
  .ss-not li::before { background: CanvasText; }
}
@media print {
  body.ss-body[data-rpi-page] { --ss-paper: #fff; --ss-ink: #000; --ss-body: #111; --ss-soft: #333; --ss-cyan-text: #0072b5; --ss-magenta-text: #c4006b; background: #fff; }
  .ss-page { width: 100%; padding: 0; }
  .ss-hero, .ss-truth, .ss-time li, .ss-three-list li { break-inside: avoid; }
  /* Print is one column already; block flow lets a head keep with its text (grids ignore break-after). */
  .ss-section, .ss-meaning-head, .ss-three-list { display: block; }
  .ss-three > .ss-label { break-after: avoid; }
  .ss-head { break-inside: avoid; break-after: avoid; }
  .ss-copy h3, .ss-hard dt { break-after: avoid; }
  .ss-fig-neutron { break-before: page; }
  .ss-next, .ss-set { display: none; }
  .ss-page a { text-decoration: none; }
}