/* Figure 2. The eighth turn, built from ticks. Every class is prefixed br2- and every token is scoped to the figure. */
.br2 {
  --x-paper: var(--br-paper, #faf8f3); --x-ink: var(--br-ink, #1d1d1b); --x-body: var(--br-body, #2a2926); --x-soft: var(--br-soft, #3c3a36);
  --x-hair: var(--br-hair, #8a8a8a); --x-c: var(--br-cyan, #009fe3); --x-c-text: var(--br-cyan-text, #0072b5);
  --x-m: var(--br-magenta, #e6007e); --x-m-text: var(--br-magenta-text, #c4006b);
  --x-rule: color-mix(in srgb, var(--x-ink) 16%, var(--x-paper));
  --x-text: var(--br-text, "InterVariable", "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif);
  --x-mono: var(--br-mono, "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace);
  margin: 0; padding: clamp(1rem, 2.4vw, 1.75rem); background: var(--x-paper); color: var(--x-body);
  border: 1px solid var(--x-ink); font-family: var(--x-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) {
  .br2 { --x-paper: var(--br-paper, #141413); --x-ink: var(--br-ink, #faf8f3); --x-body: var(--br-body, #e9e6df); --x-soft: var(--br-soft, #c9c5bc);
    --x-c: var(--br-cyan, #2bb3f0); --x-c-text: var(--br-cyan-text, #2bb3f0); --x-m: var(--br-magenta, #ff3d9e); --x-m-text: var(--br-magenta-text, #ff5aae); }
}
.br2 *, .br2 *::before, .br2 *::after { box-sizing: border-box; }
.br2-label { margin: 0; font: 700 .72rem/1.3 var(--x-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--x-soft); }
.br2-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; align-items: baseline;
  padding-bottom: .75rem; border-bottom: 1px solid var(--x-rule); }
.br2-head .br2-live { color: var(--x-ink); }
.br2-live::before { content: ""; display: inline-block; width: .5rem; height: .5rem; margin-right: .45rem; background: var(--x-c); vertical-align: .05rem; }
.br2-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(1rem, 2.5vw, 2.25rem); padding-top: 1rem; align-items: start; }
.br2-stage { min-width: 0; }
.br2-svg { display: block; width: 100%; overflow: visible; }
.br2-ringkey { margin: .6rem 0 0; display: flex; flex-direction: column; align-items: center; gap: .2rem; text-align: center;
  font: 700 .62rem/1.35 var(--x-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--x-soft); }
.br2-ring { fill: none; stroke: var(--x-rule); stroke-width: 1; }
.br2-opp { stroke: var(--x-hair); stroke-width: .8; stroke-dasharray: 2 4; }
.br2-mid { font: 500 14px var(--x-text); fill: var(--x-ink); }
.br2-mid2 { font: 700 9px var(--x-mono); letter-spacing: .12em; fill: var(--x-soft); }
.br2-box { fill: var(--x-paper); stroke: var(--x-ink); stroke-width: 1.2; }
.br2-cell.is-zero .br2-box { stroke: var(--x-hair); stroke-dasharray: 3 3; }
.br2-cell.is-key .br2-box { stroke-width: 2; }
.br2-cell.is-dark .br2-box { stroke: var(--x-ink); stroke-dasharray: none; }
.br2-idx { font: 700 11px var(--x-mono); fill: var(--x-soft); }
.br2-val { font: 700 13px var(--x-mono); fill: var(--x-c-text); font-variant-numeric: tabular-nums; }
.br2-cell.is-neg .br2-val { fill: var(--x-c-text); }   /* a value is cyan whatever its sign; the sign is in the text */
.br2-cell.is-zero .br2-val { fill: color-mix(in srgb, var(--x-ink) 65%, var(--x-paper)); font-weight: 400; }   /* an empty position's 0: lighter than a value, still 4.5:1 */
.br2-sym { font: italic 600 12px var(--x-text); fill: var(--x-ink); }
.br2-panel { display: flex; flex-direction: column; gap: 1rem; min-width: 0; }
.br2-steps { margin: 0; padding: 0; list-style: none; counter-reset: s; display: flex; flex-direction: column; gap: .2rem; }
.br2-steps li { counter-increment: s; display: flex; gap: .6rem; align-items: baseline; font: 700 .7rem/1.5 var(--x-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--x-soft); }
.br2-steps li::before { content: counter(s); display: inline-flex; justify-content: center; width: 1.5rem; border: 1px solid var(--x-hair); font-weight: 700; letter-spacing: 0; }
.br2-steps li.is-done { color: var(--x-body); }
.br2-steps li.is-done::before { border-color: var(--x-ink); }
.br2-steps li.is-now { color: var(--x-ink); }
.br2-steps li.is-now::before { background: var(--x-ink); color: var(--x-paper); border-color: var(--x-ink); }
.br2-say { margin: 0; font-size: 1rem; color: var(--x-ink); min-height: 4.3em; }
.br2-btns, .br2-pairs { display: flex; flex-wrap: wrap; gap: .4rem; }
.br2 button { appearance: none; border: 1px solid var(--x-ink); border-radius: 0; background: transparent; color: var(--x-ink);
  font: 700 .62rem/1 var(--x-mono); letter-spacing: .1em; text-transform: uppercase; padding: .55rem .65rem; min-height: 34px; cursor: pointer; }
.br2 button:hover:not(:disabled) { background: color-mix(in srgb, var(--x-ink) 8%, transparent); }
.br2 button:disabled { opacity: .45; cursor: default; }
.br2 button.br2-primary { background: var(--x-ink); color: var(--x-paper); }
.br2 button.br2-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--x-ink) 85%, var(--x-paper)); }
.br2-pairs button[aria-pressed="true"] { background: var(--x-ink); color: var(--x-paper); }
.br2 button:focus-visible { outline: 2px solid var(--x-ink); outline-offset: 2px; }
.br2-result { border-top: 1px solid var(--x-ink); padding-top: .7rem; }
.br2-map { margin: .35rem 0 0; font: 400 .95rem/1.45 var(--x-mono); color: var(--x-ink); font-variant-numeric: tabular-nums; }
.br2-check { margin: .35rem 0 0; font-size: .92rem; color: var(--x-body); }
.br2-caption { margin: 1rem 0 0; padding-top: .8rem; border-top: 1px solid var(--x-rule); font-size: .95rem; color: var(--x-body); max-width: 50rem; }
.br2-caption b { color: var(--x-ink); font-weight: 650; }
.br2-sr { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.br2 button { scroll-margin: 1rem 0; }
@media (max-width: 760px) { .br2-grid { grid-template-columns: minmax(0, 1fr); } }
@container br2fig (max-width: 40rem) { .br2-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .br2 { padding-left: .65rem; padding-right: .65rem; } .br2-val { font-size: 12px; } .br2-sym { font-size: 11px; } }
@container br2fig (max-width: 24.75rem) { .br2-val { font-size: 12px; } .br2-sym { font-size: 11px; } }
@media (pointer: coarse) { .br2 button { min-height: 44px; } }
.br2.br2-print { --x-paper: #ffffff; --x-ink: #1d1d1b; --x-body: #2a2926; --x-soft: #3c3a36; --x-c: #009fe3; --x-c-text: #0072b5; --x-m: #e6007e; --x-m-text: #c4006b; }
@media print { .br2 { background: #ffffff; color: #2a2926; border-color: #1d1d1b; break-inside: avoid-page; } .br2 button { display: none; } }
@media (forced-colors: active) {
  .br2-ring, .br2-opp, .br2-box { stroke: CanvasText; }
  .br2-box { fill: Canvas; }
  .br2-mid, .br2-mid2, .br2-idx, .br2-val, .br2-sym, .br2-cell.is-neg .br2-val { fill: CanvasText; }
  .br2-cell.is-zero .br2-val { fill: GrayText; }
  .br2-steps li.is-now::before { forced-color-adjust: none; background: Highlight; color: HighlightText; }
  .br2 button[aria-pressed="true"] { outline: 3px solid Highlight; outline-offset: 2px; }
}
/* paper: the ring beside its steps, so the figure fits one page (the ring is redrawn at its paper width) */
@media print {
  .br2, .br2 * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }   /* drawn bars and swatches print with background graphics off */
  .br2-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 1rem; padding-top: .6rem; }
  .br2-say { min-height: 0; }
  .br2-panel { gap: .6rem; }
  .br2-btns, .br2-pairs { display: none; }
}
/* the figure switches layout on its own width in the reader's text size (the @container twins of the window breakpoints) */
.br2 { container: br2fig / inline-size; }