/* Figure 4. Contacts, each read before the next: the chance that nothing has been posted after n contacts, and 32 sampled runs.
   Every class is prefixed cat4- and every token is scoped to the figure. */
.cat4 {
  --k-paper: var(--cat-paper, #faf8f3); --k-ink: var(--cat-ink, #1d1d1b); --k-body: var(--cat-body, #2a2926); --k-soft: var(--cat-soft, #3c3a36);
  --k-hair: var(--cat-hair, #8a8a8a); --k-rule: var(--cat-rule, color-mix(in srgb, var(--k-ink) 16%, var(--k-paper)));
  --k-c: #009fe3; --k-m: #e6007e; --k-c-text: #0072b5; --k-m-text: #c4006b;
  --k-text: var(--cat-text, "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif);
  --k-display: var(--cat-display, "Inter Display", "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif);
  --k-mono: var(--cat-mono, "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace);
  margin: 0; padding: clamp(.85rem, 2vw, 1.5rem); background: var(--k-paper); color: var(--k-body);
  border: 1px solid var(--k-ink); font-family: var(--k-text); font-weight: 420; line-height: 1.42;
  font-optical-sizing: auto; box-sizing: border-box; position: relative;
}
@media screen and (prefers-color-scheme: dark) {
  .cat4 { --k-paper: var(--cat-paper, #141413); --k-ink: var(--cat-ink, #faf8f3); --k-body: var(--cat-body, #e9e6df); --k-soft: var(--cat-soft, #c9c5bc);
    --k-c: #2bb3f0; --k-m: #ff3d9e; --k-c-text: #2bb3f0; --k-m-text: #ff6fb6; }
}
.cat4 *, .cat4 *::before, .cat4 *::after { box-sizing: border-box; }
.cat4-label { margin: 0; font: 700 .72rem/1.3 var(--k-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--k-soft); }
.cat4-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; align-items: center;
  padding-bottom: .75rem; border-bottom: 1px solid var(--k-rule); }
.cat4-head .cat4-live { color: var(--k-ink); }
.cat4-live::before { content: ""; display: inline-block; width: .5rem; height: .5rem; margin-right: .45rem; background: var(--k-m); vertical-align: .05rem; }
.cat4[data-paused="true"] .cat4-live::before { background: transparent; border: 1px solid var(--k-ink); }
.cat4-btns { display: flex; flex-wrap: wrap; gap: .4rem; }
.cat4 button { appearance: none; border: 1px solid var(--k-ink); border-radius: 0; background: transparent; color: var(--k-ink); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 0 .7rem;
  font: 700 .64rem/1 var(--k-mono); letter-spacing: .1em; text-transform: uppercase; }
.cat4 button:hover { background: color-mix(in srgb, var(--k-ink) 8%, transparent); }
.cat4 button:focus-visible { outline: 2px solid var(--k-ink); outline-offset: 2px; }
.cat4 { --k-lost: #c8401f; }
@media screen and (prefers-color-scheme: dark) { .cat4 { --k-lost: #ff6a3d; } }
.cat4-setup { margin: .8rem 0 0; max-width: 52rem; font-size: 1.02rem; font-weight: 450; line-height: 1.35; color: var(--k-ink); }
.cat4-setup b { font-weight: 700; }
.cat4-grid { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr); gap: clamp(1rem, 2.6vw, 2rem); padding-top: .8rem; align-items: start; }
.cat4-stage { min-width: 0; }
.cat4-plot { width: 100%; }
.cat4-svg { display: block; overflow: visible; }
.cat4-svg text { font-family: var(--k-mono); font-size: 10.5px; fill: var(--k-soft); }
.cat4-svg .lab { font-weight: 700; letter-spacing: .1em; font-size: 9.5px; }
.cat4-svg .lab-m { font-weight: 700; letter-spacing: .1em; font-size: 9px; fill: var(--k-soft); }
.cat4-svg .tick { font-size: 10px; fill: var(--k-soft); }
.cat4-svg .ax { stroke: var(--k-ink); stroke-width: 1; }
.cat4-svg .grid { stroke: var(--k-rule); stroke-width: 1; }
.cat4-svg .curve { fill: none; stroke: var(--k-c); stroke-width: 2.2; }
.cat4-svg .mean { stroke: var(--k-soft); stroke-width: 1; stroke-dasharray: 3 3; }
.cat4-svg .cursor { stroke: var(--k-ink); stroke-width: 1.5; }
.cat4-svg .dot { fill: var(--k-paper); stroke: var(--k-ink); stroke-width: 2; }
.cat4-svg .run { stroke: var(--k-hair); stroke-width: 1.4; }
.cat4-svg .run.held { stroke: var(--k-c); stroke-width: 2; }
.cat4-svg .run.later { stroke: var(--k-hair); stroke-width: 1; stroke-dasharray: 2 2; }
.cat4-svg .run.later.dense { stroke-dasharray: none; stroke-opacity: .45; stroke-width: .6; }
.cat4-svg .post { fill: var(--k-m); }
.cat4-svg .post.later { fill: var(--k-paper); stroke: var(--k-m); stroke-width: 1; }
.cat4-nocase { text-transform: none; letter-spacing: 0; }
.cat4-key { margin: .3rem 0 0; font: 400 .7rem/1.4 var(--k-mono); color: var(--k-soft); }
.cat4-key i { font-style: normal; white-space: nowrap; } .cat4-key i + i { margin-left: .9rem; }
.cat4-key b { display: inline-block; vertical-align: middle; margin-right: .35rem; }
.cat4-key .k-held { width: 1.3rem; height: 0; border-top: 2px solid var(--k-c); }
.cat4-key .k-post { width: .5rem; height: .5rem; border-radius: 50%; background: var(--k-m); }
.cat4-key .k-done { width: 1.3rem; height: 0; border-top: 1.4px solid var(--k-hair); }
.cat4-key .k-later { width: .5rem; height: .5rem; border-radius: 50%; border: 1px solid var(--k-m); background: var(--k-paper); }
.cat4-dials { display: grid; grid-template-columns: 1fr 1fr; gap: .2rem 1.4rem; }
@media (max-width: 520px) { .cat4-dials { grid-template-columns: 1fr; } }
.cat4-say b { font-family: var(--k-display); font-weight: 820; font-size: 1.15rem; letter-spacing: -.02em; color: var(--k-ink); }
.cat4-dial { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 .6rem; align-items: center; margin-top: .5rem;
  font: 700 .64rem/1.3 var(--k-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--k-soft); }
.cat4-dial output { font: 400 .9rem/1 var(--k-mono); letter-spacing: .02em; color: var(--k-ink); font-variant-numeric: tabular-nums; }
.cat4-dial input { grid-column: 1 / -1; width: 100%; margin: .1rem 0 0; accent-color: var(--k-ink); min-height: 30px; }
.cat4-panel { min-width: 0; display: flex; flex-direction: column; gap: .9rem; }
.cat4-big { border-top: 3px solid var(--k-c); padding-top: .5rem; }
.cat4-big .cat4-label { color: var(--k-c-text); }
.cat4-num { display: block; margin: .3rem 0 .2rem; font-family: var(--k-display); font-weight: 860; font-size: clamp(2.2rem, 4vw, 3.2rem); line-height: .9;
  letter-spacing: -.045em; color: var(--k-ink); font-variant-numeric: tabular-nums lining-nums; white-space: nowrap; }
.cat4-sub { margin: 0; font: 400 .74rem/1.4 var(--k-mono); color: var(--k-soft); }
.cat4-stat { border-top: 1px solid var(--k-ink); padding-top: .45rem; }
.cat4-val { margin: .2rem 0 0; font: 400 .9rem/1.35 var(--k-mono); color: var(--k-ink); }
.cat4-val b { font-family: var(--k-display); font-weight: 820; font-size: 1.35rem; letter-spacing: -.02em; }
.cat4-say { margin: 0; font-size: .95rem; line-height: 1.4; color: var(--k-body); }
.cat4-fine { margin: .9rem 0 0; padding-top: .7rem; border-top: 1px solid var(--k-rule); font-size: .86rem; line-height: 1.4; color: var(--k-soft); max-width: 62rem; }
.cat4-sr { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
@media (max-width: 860px) { .cat4-grid { grid-template-columns: minmax(0, 1fr); } }
@media (prefers-reduced-motion: reduce) { .cat4 * { transition: none !important; animation: none !important; } }
@media (forced-colors: active) {
  .cat4 { forced-color-adjust: none; --k-paper: Canvas; --k-ink: CanvasText; --k-body: CanvasText; --k-soft: CanvasText; --k-hair: GrayText;
    --k-c: Highlight; --k-m: LinkText; --k-c-text: CanvasText; --k-m-text: CanvasText; --k-rule: GrayText; }
}
@media print { .cat4 { --k-paper: #fff; --k-ink: #000; --k-body: #000; --k-soft: #222; print-color-adjust: exact; -webkit-print-color-adjust: exact; } }
@media print {
  /* on paper a figure starts on the page that holds its head row and first block; its blocks are not split */
  .cat4-head, .cat4-setup { break-after: avoid; break-inside: avoid; }
  .cat4-grid { padding-top: 0; margin-top: .8rem; break-before: avoid; }
  .cat4-grid > *, .cat4-grid > * > * { break-inside: avoid; }
  .cat4-svg { max-width: 100%; height: auto; }   /* the plot is redrawn at the print width; this keeps it inside if not */
}