/* ============================================================================
   PAPER — manuscript typesetting. Loaded only on the two paper pages.
   The manuscript sits on a bone document panel: cinnabar owns the shell, but
   nobody reads twenty thousand words on a saturated red field.
   ========================================================================= */

.paper-shell {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr);
  gap: var(--s5);
  max-width: var(--shell);
  margin-inline: auto;
  padding: var(--s5) var(--gutter) var(--s7);
  align-items: start;
}

/* --- Contents --------------------------------------------------------- */
.paper-toc {
  position: sticky;
  top: 96px;
  min-width: 0;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.toc-head {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ink-faint);
}
.paper-toc a {
  display: block;
  padding: 6px 0 6px 12px;
  font-size: var(--t-ms);
  line-height: 1.3;
  text-decoration: none;
  color: var(--ink-quiet);
  border-left: 1px solid var(--ink-faint);
}
.paper-toc a:hover { color: var(--ink); background: var(--bone-dim); }
.paper-toc a.is-here {
  color: var(--cinnabar);
  border-left-color: var(--cinnabar);
  font-weight: 600;
}

/* --- The manuscript --------------------------------------------------- */
.paper { min-width: 0; max-width: 74ch; }

.paper h2 {
  font-family: var(--display);
  font-weight: 800;
  font-variation-settings: "wdth" 104;
  font-size: var(--t-lead);
  line-height: 1.06;
  letter-spacing: -0.018em;
  margin-top: var(--s6);
  padding-top: var(--s3);
  border-top: 2px solid var(--ink);
  scroll-margin-top: 100px;
}
.paper h3 {
  font-family: var(--display);
  font-weight: 700;
  font-variation-settings: "wdth" 100;
  font-size: 18.5px;
  line-height: 1.2;
  letter-spacing: -0.008em;
  margin-top: var(--s4);
  scroll-margin-top: 100px;
}
.sec-num {
  display: inline-block;
  min-width: 1.9em;
  color: var(--cinnabar);
}

.paper p { margin-top: var(--s2); line-height: 1.66; text-wrap: pretty; }
.paper h2 + p, .paper h3 + p { margin-top: var(--s2); }

.paper ul, .paper ol { margin: var(--s2) 0 0; padding-left: 1.4em; }
.paper li { margin-top: 6px; line-height: 1.58; }

/* A run-in label. It is a paragraph, not a heading — making it an <h4>
   under an <h2> skipped a level and broke the document outline. */
.runin {
  margin-top: var(--s3);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}

.abstract {
  background: var(--bone-dim);
  padding: var(--s3);
  margin-top: var(--s3);
  border-left: 1px solid var(--cinnabar);
}
.abstract p { margin-top: 0; font-size: var(--t-small); line-height: 1.6; }

/* --- Maths ------------------------------------------------------------ */
.eq {
  display: block;
  margin: var(--s3) 0;
  padding: 14px var(--s3);
  background: var(--bone-dim);
  font-family: var(--mono);
  font-size: var(--t-ms-sm);
  line-height: 1.75;
  font-variation-settings: "wdth" 87;
  overflow-x: auto;
}
.var { font-family: var(--text); font-style: italic; }
.num { font-family: var(--mono); font-size: 0.92em; font-variation-settings: "wdth" 87; }
.paper code {
  font-family: var(--mono);
  font-size: 0.84em;
  font-variation-settings: "wdth" 87;
  background: var(--bone-dim);
  padding: 0.1em 0.3em;
}

/* --- Figures ---------------------------------------------------------- */
.figure { margin: var(--s4) 0 0; }
.figure img {
  width: 100%;
  background: var(--bone);
  box-shadow: inset 0 0 0 1px var(--ink-faint);
}
.figcap {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 9.5px;
  line-height: 1.55;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-quiet);
}
.figcap b { color: var(--cinnabar); font-weight: 500; }
.figcap span { text-transform: none; letter-spacing: 0.02em; font-family: var(--text); font-size: var(--t-ms-sm); display: block; margin-top: 6px; }

/* --- Tables -----------------------------------------------------------
   The fade is the only cue that a table continues past the right edge:
   touch scrollbars are invisible at rest, and these tables hide roughly
   half their width at 390px. */
.table-scroll {
  overflow-x: auto;
  margin-top: var(--s3);
  -webkit-overflow-scrolling: touch;
  mask-image: linear-gradient(to right, #000 calc(100% - 40px), transparent);
  -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 40px), transparent);
}
@supports (animation-timeline: scroll(self inline)) {
  .table-scroll {
    animation: unfade linear both;
    animation-timeline: scroll(self inline);
    animation-range: contain;
  }
}
@keyframes unfade {
  to { mask-image: linear-gradient(to right, #000 100%, transparent); -webkit-mask-image: linear-gradient(to right, #000 100%, transparent); }
}

.tbl { border-collapse: collapse; width: 100%; font-size: var(--t-ms); }
.tbl caption {
  text-align: left;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  padding-bottom: 10px;
}
.tbl th, .tbl td { padding: 9px 14px 9px 0; text-align: right; white-space: nowrap; }
.tbl th:first-child, .tbl td:first-child { text-align: left; white-space: normal; min-width: 13ch; }
.tbl thead th {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink);
  color: var(--ink);
}
.tbl tbody tr { border-bottom: 1px solid var(--ink-faint); }
.tbl tbody td { font-family: var(--mono); font-size: var(--t-data); font-variation-settings: "wdth" 87; }
.tbl tbody td:first-child { font-family: var(--text); font-size: var(--t-ms); }
.tbl .is-ours { background: rgba(178, 45, 34, 0.09); }
.tbl .is-ours td:first-child { font-weight: 700; color: var(--cinnabar); }
.tbl .group td {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-quiet);
  padding-top: var(--s3);
}

/* --- Apparatus -------------------------------------------------------- */
.callout {
  margin-top: var(--s4);
  padding: var(--s3);
  background: var(--bone-dim);
  border-left: 1px solid var(--cinnabar);
  font-size: var(--t-small);
  line-height: 1.55;
}
.mono-label {
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cinnabar);
  margin-bottom: 8px;
}
.refs { list-style: none; padding: 0; margin-top: var(--s3); }
.refs li {
  font-size: var(--t-ms);
  line-height: 1.5;
  padding-left: 2.2em;
  text-indent: -2.2em;
  margin-top: 10px;
  color: var(--ink-quiet);
}
.fn { font-size: var(--t-ms-sm); color: var(--ink-quiet); }
.paper .note { margin-top: var(--s2); }

@media (max-width: 1000px) {
  .paper-shell { grid-template-columns: minmax(0, 1fr); gap: var(--s4); padding-top: var(--s4); }
  .paper-toc {
    position: static;
    max-height: none;
    overflow: visible;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0 var(--s3);
  }
  .toc-head { grid-column: 1 / -1; }
  .paper { max-width: none; }
}