/* ==========================================================================
   Research: topical PDRN and spicules (blog/research/pdrn-and-spicules.html).
   Sits on css/site.css + blog/blog.css and uses only their tokens. The two
   figures are plain HTML/CSS (no SVG, no script) so they reflow on a phone
   and follow the theme. Page-only classes are prefixed rs-.
   ========================================================================== */

/* Figures may leave the reading column for the wide lane, like tables. */
.post-body > .rs-wide {
  grid-column: 1 / -1;
  justify-self: center;
  width: 100%;
  max-width: var(--wide);
  margin: 8px 0 34px;
}
.rs-fig {
  padding: clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.rs-fig-h {
  margin: 0 0 16px;
  font: 500 semi-condensed 0.6875rem/1.3 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.rs-fig figcaption {
  margin-top: 16px;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--ink-3);
}

/* A row = label + track. Two columns on wide screens, stacked on a phone. */
.rs-plot { display: grid; gap: 14px; }
.rs-row {
  display: grid;
  grid-template-columns: minmax(12rem, 17rem) minmax(0, 1fr);
  gap: 6px 22px;
  align-items: center;
}
@media (max-width: 640px) {
  .rs-row { grid-template-columns: minmax(0, 1fr); }
  .rs-axis-row .rs-label { display: none; }
}
.rs-label { font-size: 0.9375rem; line-height: 1.35; color: var(--ink); }
.rs-label small { display: block; margin-top: 2px; font: 400 semi-condensed 0.75rem/1.4 var(--mono); color: var(--ink-3); }

/* The track draws its own gridlines: --cols equal steps across the width. */
.rs-track {
  --cols: 6;
  position: relative;
  height: 34px;
  border-left: 1px solid var(--line-strong);
  background-image: linear-gradient(to right, var(--line) 1px, transparent 1px);
  background-size: calc(100% / var(--cols)) 100%;
  background-position: -1px 0;
}
.rs-track.is-depth { --cols: 9; } /* 0-180 microns: a gridline every 20 */

/* Dose figure: a dot per value on a log axis, value label beside it. */
.rs-dot {
  position: absolute;
  top: 50%;
  left: var(--x);
  width: 13px;
  height: 13px;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--ink);
  transform: translate(-50%, -50%);
}
.rs-dot.is-accent { background: var(--accent); }
.rs-val {
  position: absolute;
  top: 50%;
  left: calc(var(--x) + 13px);
  transform: translateY(-50%);
  font: 600 0.875rem/1 var(--sans);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--ink);
}
.rs-val.is-left { left: auto; right: calc(100% - var(--x) + 13px); }
.rs-val small { font-weight: 400; color: var(--ink-3); }

/* Depth figure: bars from the skin surface (left) inward. */
.rs-bar {
  position: absolute;
  top: 50%;
  left: 0;
  width: var(--w);
  height: 14px;
  border-radius: 0 4px 4px 0;
  background: var(--ink-2);
  transform: translateY(-50%);
}
.rs-bar.is-accent { background: var(--accent); }
/* Open-ended: the signal was seen past this depth, not stopped at it. */
.rs-bar.is-open { border-radius: 0; -webkit-mask-image: linear-gradient(to right, #000 70%, transparent); mask-image: linear-gradient(to right, #000 70%, transparent); }
.rs-rod {
  position: absolute;
  top: 50%;
  left: 0;
  width: var(--w);
  height: 3px;
  border-radius: 2px;
  background: var(--ink-3);
  transform: translateY(-50%);
}
.rs-whisker {
  position: absolute;
  top: 50%;
  left: var(--from);
  width: calc(var(--to) - var(--from));
  height: 12px;
  border: solid var(--ink);
  border-width: 0 1.5px;
  transform: translateY(-50%);
}
.rs-whisker::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  border-top: 1.5px solid var(--ink);
}
.rs-bar-val {
  position: absolute;
  top: 50%;
  left: calc(var(--w) + 10px);
  transform: translateY(-50%);
  font: 600 0.875rem/1 var(--sans);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--ink);
}
.rs-bar-val.is-left { left: auto; right: calc(100% - var(--w) + 10px); }

/* Axis labels sit under the last track, at the same fractions as the grid. */
.rs-axis { height: 22px; border-left: 0; background: none; }
.rs-axis span {
  position: absolute;
  top: 0;
  left: var(--x);
  transform: translateX(-50%);
  font: 400 0.75rem/1 var(--sans);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--ink-3);
}
.rs-axis span:first-child { transform: none; }
.rs-axis span:last-child { transform: translateX(-100%); }
.rs-axis-unit { margin-top: 6px; font: 400 semi-condensed 0.75rem/1.4 var(--mono); color: var(--ink-3); text-align: right; }

/* On a phone the tracks are ~300px: thin the axis to every other decade, and
   drop the bar-end values (each row's label already carries its number). */
@media (max-width: 640px) {
  .rs-axis .rs-minor { display: none; }
  .rs-bar-val { display: none; }
}

/* The trial-at-a-glance table: first column is a label, second is prose. */
.post-body .rs-facts td:last-child { white-space: normal; min-width: 22rem; }
.post-body .rs-facts td:first-child { white-space: nowrap; color: var(--ink-3); }
@media (max-width: 640px) {
  .post-body .rs-facts td:first-child { white-space: normal; }
  .post-body .rs-facts td:last-child { min-width: 0; }
}

/* A quiet pointer under the end nav: findable, not featured. */
.rs-aside {
  margin-top: 20px;
  font: 500 semi-condensed 0.75rem/1.4 var(--mono);
  color: var(--ink-3);
}
.rs-aside a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
.rs-aside a:hover { color: var(--ink); }