/* The author’s NS Per diagram, reflowed as accessible HTML instead of raster text.
   All selectors and custom properties stay inside this independent component. */
.binary-evolution-map {
  --bem-red: #a33c2d;
  --bem-red-wash: #fbf0ec;
  --bem-grey: #756e62;
  --bem-vertical: 0;
  color: var(--ink, #211d15);
  background: var(--surface, #fff);
  padding: clamp(1rem, 2.5vw, 1.6rem);
  border-bottom: 1px solid var(--line, #e1dccf);
  font-family: var(--sans, Arial, sans-serif);
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}
.binary-evolution-map *,
.binary-evolution-map *::before,
.binary-evolution-map *::after { box-sizing: border-box; }
.binary-evolution-map .bem-head { display: flex; gap: .5rem 1.5rem; flex-wrap: wrap; justify-content: space-between; align-items: baseline; margin-bottom: .7rem; }
.binary-evolution-map .bem-head h3 { margin: 0; font-family: var(--serif, Georgia, serif); font-size: 1.3rem; font-weight: 560; color: var(--ink, #211d15); line-height: 1.3; }
.binary-evolution-map .bem-head p { margin: 0; font-size: .78rem; color: var(--ink-soft, #4f4a3e); line-height: 1.5; }
.binary-evolution-map .bem-diagram {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-template-rows: minmax(84px, auto) auto 32px minmax(94px, auto);
  column-gap: clamp(.4rem, 1vw, 1rem);
  row-gap: .55rem;
  min-width: 0;
  isolation: isolate;
}
.binary-evolution-map button {
  font: inherit;
  font-size: .83rem;
  line-height: 1.4;
  letter-spacing: 0;
  appearance: none;
  -webkit-appearance: none;
  min-width: 0;
  margin: 0;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  position: relative;
  color: var(--ink-soft, #4f4a3e);
  transition: background .18s ease, border-color .18s ease;
  z-index: 1;
  touch-action: manipulation;
}
.binary-evolution-map button:hover { background: var(--surface-2, #f3f1ea); border-color: var(--line, #e1dccf); }
.binary-evolution-map button:focus-visible { outline: 2px solid var(--bem-red); outline-offset: 3px; }
.binary-evolution-map .bem-stage {
  grid-column: var(--bem-column);
  grid-row: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: .55rem .2rem 1.65rem;
  color: var(--bem-red);
}
.binary-evolution-map .bem-time { display: block; min-height: 1.45rem; font-size: .82rem; font-weight: 600; white-space: nowrap; font-variant-numeric: tabular-nums; }
.binary-evolution-map .bem-art { display: block; width: min(116px, 90%); height: 84px; color: #393a35; flex: 0 0 auto; }
.binary-evolution-map .bem-cartoon { display: block; width: 100%; height: 100%; overflow: visible; }
.binary-evolution-map .bem-title { display: block; font-size: .87rem; font-weight: 600; line-height: 1.3; text-wrap: balance; }
.binary-evolution-map .bem-stage .bem-title { min-height: 2.3em; margin-top: .35rem; }
.binary-evolution-map .bem-detail,
.binary-evolution-map .bem-period { display: block; font-size: .78rem; line-height: 1.5; font-variant-numeric: tabular-nums; }
.binary-evolution-map .bem-period { white-space: nowrap; }
.binary-evolution-map .bem-active-label { position: absolute; bottom: .35rem; left: .25rem; right: .25rem; display: none; font-size: .65rem; font-weight: 650; letter-spacing: .035em; text-transform: uppercase; }
.binary-evolution-map .bem-main.is-current,
.binary-evolution-map .bem-main.is-in-transit { background: var(--bem-red-wash); border-color: #d8a095; }
.binary-evolution-map .is-current .bem-active-label { display: block; }
.binary-evolution-map .bem-branch {
  grid-column: 4 / 7;
  justify-self: start;
  display: grid;
  grid-template-columns: auto 90px minmax(0, 1fr);
  align-items: center;
  gap: .75rem;
  max-width: 100%;
  padding: .35rem .6rem .55rem;
  text-align: left;
}
.binary-evolution-map .bem-merger { grid-row: 1; }
.binary-evolution-map .bem-detached { grid-row: 4; }
.binary-evolution-map .bem-branch .bem-art { width: 90px; height: 65px; }
.binary-evolution-map .bem-branch .bem-title { font-size: .86rem; }
.binary-evolution-map .bem-efficiency { white-space: nowrap; font-size: .85rem; font-weight: 550; }
.binary-evolution-map .bem-outcome { display: flex; flex-direction: column; min-width: 0; }
.binary-evolution-map .bem-branch .bem-active-label { position: static; grid-column: 1 / -1; line-height: 1; }
.binary-evolution-map .bem-branch.is-current { background: var(--surface-2, #f3f1ea); border-color: var(--line-strong, #ccc6b5); }
.binary-evolution-map .bem-tides {
  grid-column: 4 / 6;
  grid-row: 3;
  align-self: start;
  justify-self: center;
  margin: 0;
  padding: .38rem .65rem;
  min-height: 32px;
  font-size: .76rem;
  font-weight: 550;
  color: var(--bem-red);
  background: var(--surface, #fff);
  border-color: var(--line, #e1dccf);
  z-index: 2;
}
.binary-evolution-map .bem-tides.is-current { border-color: var(--bem-red); background: var(--bem-red-wash); box-shadow: inset 0 -2px 0 var(--bem-red); }
.binary-evolution-map .bem-links { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; z-index: 0; }
.binary-evolution-map .bem-link-main { fill: none; stroke: var(--bem-red); stroke-width: 1.9; stroke-linejoin: round; }
.binary-evolution-map .bem-link-alternative { fill: none; stroke: var(--bem-grey); stroke-width: 1.4; stroke-linejoin: round; }
.binary-evolution-map .bem-note { margin: 1.25rem 0 0; padding-top: .8rem; border-top: 1px solid var(--line, #e1dccf); color: var(--ink-soft, #4f4a3e); font-size: .76rem; line-height: 1.6; max-width: none; }
.binary-evolution-map sub { font-size: .72em; line-height: 0; }

/* Reflow, do not shrink an entire scientific diagram to a phone’s width.
   The art becomes a fixed left-hand lane; every label keeps a readable size. */
@media (max-width: 800px) {
  .binary-evolution-map { --bem-vertical: 1; }
  .binary-evolution-map .bem-head { display: block; margin-bottom: .9rem; }
  .binary-evolution-map .bem-head p { margin-top: .3rem; }
  .binary-evolution-map .bem-diagram { grid-template-columns: minmax(0, 1fr); grid-template-rows: none; gap: .7rem; }
  .binary-evolution-map .bem-stage {
    grid-column: 1;
    grid-row: auto;
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    grid-template-rows: auto auto auto auto;
    column-gap: .7rem;
    align-items: center;
    padding: .7rem .5rem .8rem 0;
    min-height: 102px;
    text-align: left;
  }
  .binary-evolution-map .bem-stage-0 { order: 0; }
  .binary-evolution-map .bem-stage-1 { order: 1; }
  .binary-evolution-map .bem-stage-2 { order: 2; }
  .binary-evolution-map .bem-merger { order: 3; }
  .binary-evolution-map .bem-detached { order: 4; }
  .binary-evolution-map .bem-stage-3 { order: 5; }
  .binary-evolution-map .bem-tides { order: 6; }
  .binary-evolution-map .bem-stage-5 { order: 7; }
  .binary-evolution-map .bem-stage-6 { order: 8; }
  .binary-evolution-map .bem-stage .bem-art { grid-column: 1; grid-row: 1 / 5; width: 88px; height: 72px; }
  .binary-evolution-map .bem-stage .bem-time { grid-column: 2; min-height: 0; font-size: .8rem; align-self: end; }
  .binary-evolution-map .bem-stage-2 .bem-time { display: none; }
  .binary-evolution-map .bem-stage .bem-title { grid-column: 2; min-height: 0; margin-top: 0; font-size: .9rem; align-self: center; text-wrap: initial; }
  .binary-evolution-map .bem-stage .bem-detail,
  .binary-evolution-map .bem-stage .bem-period { grid-column: 2; font-size: .8rem; }
  .binary-evolution-map .bem-stage .bem-active-label { left: 99px; bottom: .1rem; font-size: .6rem; }
  .binary-evolution-map .bem-branch {
    grid-column: 1;
    grid-row: auto;
    justify-self: stretch;
    grid-template-columns: 60px minmax(0, 1fr);
    grid-template-rows: auto auto;
    margin-left: 66px;
    padding: .65rem .5rem;
    column-gap: .6rem;
    row-gap: .25rem;
    border-color: var(--line, #e1dccf);
    background: var(--surface, #fff);
  }
  .binary-evolution-map .bem-branch .bem-art { grid-column: 1; grid-row: 1 / 3; width: 60px; height: 52px; }
  .binary-evolution-map .bem-efficiency { grid-column: 2; font-size: .8rem; }
  .binary-evolution-map .bem-outcome { grid-column: 2; }
  .binary-evolution-map .bem-branch .bem-title { font-size: .82rem; }
  .binary-evolution-map .bem-branch .bem-detail,
  .binary-evolution-map .bem-branch .bem-period { font-size: .76rem; }
  .binary-evolution-map .bem-branch .bem-active-label { grid-column: 2; font-size: .58rem; line-height: 1.3; }
  .binary-evolution-map .bem-tides { grid-column: 1; grid-row: auto; margin: -.25rem 0 -.25rem 98px; justify-self: start; align-self: auto; min-height: 38px; font-size: .77rem; }
  .binary-evolution-map .bem-tides span:last-child { display: inline-block; transform: rotate(90deg); }
  .binary-evolution-map .bem-note { margin-top: .8rem; font-size: .75rem; }
}
@media (prefers-reduced-motion: reduce) {
  .binary-evolution-map button { transition: none; }
}