/* Figures for the FlexDM post: one request's journey (A) and the read-twice mask (B). */

.viz {
  /* One hue: the body is neutral slate, question tokens take the site accent in two steps. */
  --seg-c: #66707a;
  --seg-q: #0d6b58;
  --seg-l: #62ab99;

  margin: 36px 0 40px;
  padding: 20px 20px 16px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--ink) 2.5%, var(--paper));
  font-size: 0.92rem;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .viz {
    --seg-c: #a9b2ba;
    --seg-q: #63c2a6;
    --seg-l: #2f8570;
  }
}

:root[data-theme="dark"] .viz {
  --seg-c: #a9b2ba;
  --seg-q: #63c2a6;
  --seg-l: #2f8570;
}

.viz [data-seg="c"] { --k: var(--seg-c); }
.viz [data-seg="q"] { --k: var(--seg-q); }
.viz [data-seg="l"] { --k: var(--seg-l); }
.viz [data-seg="r"] { --k: var(--faint); }
.viz [data-seg="a"] { --k: var(--ink); }

.viz p,
.viz li {
  margin: 0;
}

.viz figcaption {
  margin-top: 12px;
  color: var(--faint);
  font-size: 0.8rem;
  line-height: 1.6;
}

.viz-btn {
  padding: 3px 12px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: none;
  color: var(--graphite);
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.viz-btn:hover {
  color: var(--ink);
}

.viz-btn[aria-pressed="true"],
.viz-btn[aria-current="step"] {
  border-color: var(--accent-soft);
  background: var(--accent-wash);
  color: var(--ink);
}

.viz-btn .num {
  margin-left: 4px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.viz-btn[aria-pressed="true"] .num {
  color: var(--accent);
}

.viz .viz-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  color: var(--graphite);
  font-size: 0.82rem;
}

.viz-legend li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.viz-legend i,
.ro-cov i {
  width: 10px;
  height: 10px;
  border-radius: 2.5px;
  background: var(--k);
}

/* ---------- A. One request's journey ---------- */

.jr-stage {
  position: relative;
  margin: 0 -6px 12px;
}

.jr-stage canvas,
.viz-plot canvas,
.mask-plot canvas {
  display: block;
  width: 100%;
}

.jr-meter {
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  color: var(--graphite);
  font-size: 0.78rem;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.jr-meter.on {
  opacity: 1;
}

.jr-meter-track {
  height: 6px;
  margin-top: 6px;
  border-radius: 3px;
  background: var(--mask);
}

.jr-meter-fill {
  width: 0;
  height: 100%;
  border-radius: 3px;
  background: var(--accent);
  transition: width 0.9s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.viz .jr-readout {
  margin-bottom: 10px;
  color: var(--graphite);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}

.jr-text {
  min-height: 3.2em;
}

.jr-text strong {
  margin-right: 6px;
}

.jr-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.viz .jr-steps {
  flex: 1;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.jr-steps li {
  flex: 1;
}

.jr-seg {
  display: block;
  width: 100%;
  height: 20px;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.jr-seg::before {
  content: '';
  display: block;
  height: 3px;
  border-radius: 2px;
  background: var(--hairline);
  transition: background-color 0.3s ease, height 0.2s ease;
}

.jr-seg:hover::before {
  background: var(--faint);
}

.jr-seg.done::before {
  background: var(--accent-soft);
}

.jr-seg[aria-current="step"]::before {
  height: 5px;
  background: var(--accent);
}

.jr-count {
  color: var(--faint);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.viz-icon {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--hairline);
  border-radius: 50%;
  background: none;
  color: var(--ink);
  cursor: pointer;
}

.viz-icon:hover {
  background: var(--accent-wash);
  color: var(--accent);
}

.viz-icon svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.viz-icon .pause,
.viz-icon.is-playing .play {
  display: none;
}

.viz-icon.is-playing .pause {
  display: block;
}

/* ---------- B. Read-twice attention mask ---------- */

.viz-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.mask-plot {
  margin: 10px -6px 12px;
  cursor: crosshair;
  touch-action: pan-y;
}

.viz-plot {
  margin: 10px -6px 12px;
}

.viz-readout {
  display: grid;
  gap: 4px;
}

.ro-who {
  font-weight: 500;
}

.ro-cov {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 14px;
  color: var(--graphite);
  font-variant-numeric: tabular-nums;
}

.ro-cov span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.ro-cov .full {
  color: var(--ink);
}

.ro-note {
  color: var(--graphite);
}

@media (max-width: 860px) {
  .viz {
    padding: 16px 14px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .jr-meter,
  .jr-meter-fill {
    transition: none;
  }
}