/* Figure 5. Three slits interfere only in pairs. Every class is prefixed ds5-. The figure takes the page's tokens when the page defines them.
   Red (the page's "open" ink) marks only the counterfactual: the value a fourth-power read would leave. */
.ds5 {
  --dsf-paper: var(--ds-paper, #faf8f3); --dsf-ink: var(--ds-ink, #1d1d1b); --dsf-body: var(--ds-body, #2a2926);
  --dsf-soft: var(--ds-soft, #3c3a36); --dsf-hair: var(--ds-hair, #8a8a8a);
  --dsf-rule: color-mix(in srgb, var(--dsf-ink) 16%, var(--dsf-paper));
  --dsf-open: var(--ds-open, #c8401f);
  --dsf-text: var(--ds-text, "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif);
  --dsf-display: var(--ds-display, "Inter Display", "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif);
  --dsf-mono: var(--ds-mono, "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace);
  margin: 0; color: var(--dsf-body); font-family: var(--dsf-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) {
  .ds5 { --dsf-paper: var(--ds-paper, #141413); --dsf-ink: var(--ds-ink, #faf8f3); --dsf-body: var(--ds-body, #e9e6df);
    --dsf-soft: var(--ds-soft, #c9c5bc); --dsf-open: var(--ds-open, #ff6a3d); }
}
.ds5 *, .ds5 *::before, .ds5 *::after { box-sizing: border-box; }
.ds5-label { margin: 0; font: 700 .72rem/1.3 var(--dsf-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dsf-soft); }
.ds5-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .4rem 1rem; align-items: baseline;
  padding-bottom: .6rem; margin-bottom: .8rem; border-bottom: 1px solid var(--dsf-rule); }
.ds5-head .ds5-live { color: var(--dsf-ink); }
.ds5-live::before { content: ""; display: inline-block; width: .5rem; height: .5rem; margin-right: .45rem; background: var(--dsf-ink); vertical-align: .05rem; }
.ds5-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(220px, 1fr); gap: clamp(1rem, 2.6vw, 2rem); align-items: start; }
.ds5-stage, .ds5-panel { min-width: 0; }
.ds5-view { display: block; width: 100%; height: 320px; }
.ds5-formula { margin: .6rem 0 0; font: 400 .92rem/1.6 var(--dsf-text); color: var(--dsf-soft); font-variant-numeric: tabular-nums; }
.ds5-term { white-space: nowrap; color: color-mix(in srgb, var(--dsf-ink) 45%, var(--dsf-paper)); }
.ds5-term.is-in { color: var(--dsf-ink); }
.ds5-term.is-now { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.ds5-eq { color: var(--dsf-ink); font-weight: 650; white-space: nowrap; }
.ds5-pdef { margin: .15rem 0 0; font-size: .8rem; color: var(--dsf-soft); }
.ds5-term { padding-left: .1rem; }
.ds5-slider { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .1rem .5rem; align-items: baseline; margin-top: .6rem;
  font: 700 .66rem/1.3 var(--dsf-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--dsf-ink); }
.ds5-slider output { font: 400 .9rem/1.2 var(--dsf-mono); letter-spacing: .02em; color: var(--dsf-ink); text-transform: none; font-variant-numeric: tabular-nums; }
.ds5-slider input { flex: 1 1 100%; width: 100%; margin: .3rem 0 0; accent-color: var(--dsf-ink); min-height: 28px; }
.ds5-slider input:focus-visible { outline: 2px solid var(--dsf-ink); outline-offset: 2px; }
.ds5-words { margin: .5rem 0 0; font-size: .95rem; line-height: 1.38; color: var(--dsf-ink); min-height: 2.8em; }
.ds5-k { text-transform: none; white-space: nowrap; }
.ds5-panel { display: flex; flex-direction: column; gap: 1.1rem; }
.ds5-readout { border-top: 1px solid var(--dsf-ink); padding-top: .7rem; }
.ds5-big { margin: .4rem 0 .3rem; }
.ds5-num { font-family: var(--dsf-display); font-weight: 860; font-size: clamp(2.6rem, 5vw, 3.6rem); line-height: .86; letter-spacing: -.05em; color: var(--dsf-ink); }
.ds5-sub { margin: 0; font-size: .86rem; color: var(--dsf-soft); }
.ds5-scale { border-top: 1px solid var(--dsf-rule); padding-top: .7rem; }
.ds5-axis { display: block; width: 100%; overflow: visible; margin-top: .4rem; }
.ds5 .ds5-t { font: 700 10.5px var(--dsf-mono); letter-spacing: .06em; fill: var(--dsf-ink); }
.ds5 .ds5-t0 { font: 400 10.5px var(--dsf-mono); fill: var(--dsf-soft); }
.ds5 .ds5-t4 { fill: var(--dsf-open); }
.ds5 .ds5-band { fill: color-mix(in srgb, var(--dsf-ink) 8%, transparent); }
.ds5 .ds5-bound { stroke: var(--dsf-ink); stroke-width: 1.5; stroke-dasharray: 3 2; }
.ds5 .ds5-base { stroke: var(--dsf-ink); stroke-width: 1; }
.ds5 .ds5-p4 { fill: var(--dsf-open); }
.ds5 .ds5-lead { stroke: var(--dsf-open); stroke-width: 1; }
.ds5 .ds5-zero { fill: none; stroke: var(--dsf-ink); stroke-width: 1.75; }
.ds5-caption { margin: 1rem 0 0; padding-top: .8rem; border-top: 1px solid var(--dsf-rule); font-size: .92rem; color: var(--dsf-body); max-width: 52rem; }
.ds5-sr { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
/* one column when the figure itself is narrow (set from its own width) */
.ds5.ds5-one .ds5-grid { grid-template-columns: minmax(0, 1fr); }
@media (pointer: coarse) { .ds5 input[type="range"] { min-height: 44px; } }
.ds5 input { scroll-margin: 1rem 0; }
.ds5.ds5-print { --dsf-paper: #ffffff; --dsf-ink: #1d1d1b; --dsf-body: #2a2926; --dsf-soft: #3c3a36; --dsf-open: #c8401f; }
@media print {
  .ds5 { color: #2a2926; }
  .ds5 input[type="range"] { display: none; }
  .ds5, .ds5 * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .ds5 canvas { object-fit: contain; }   /* a drawing made at the screen's width keeps its shape at the paper's; its box never changes height */
  .ds5-stage, .ds5-panel { break-inside: avoid; }
}
@media (forced-colors: active) {
  .ds5 { --dsf-paper: Canvas; --dsf-ink: CanvasText; --dsf-body: CanvasText; --dsf-soft: CanvasText; --dsf-hair: GrayText; --dsf-rule: GrayText; --dsf-open: Highlight; }
  .ds5 canvas, .ds5 svg { forced-color-adjust: none; }
  .ds5-live::before { forced-color-adjust: none; }
}

/* very large text on a narrow screen (the breakpoint is in rem, so it follows the reader's font size): long formulas may wrap */
@media (max-width: 22rem) { .ds5-k, .ds5-eq { white-space: normal; } }
.ds5-slider > span { flex: 1 1 10rem; min-width: 0; }