:root {
  --ink: #101216;
  --ink-soft: #343941;
  --muted: #68707c;
  --line: #d8dde3;
  --paper: #f8faf9;
  --surface: #ffffff;
  --bar-h: 60px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --sans: Inter, Aptos, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; overflow: hidden;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(circle, rgba(16, 18, 22, 0.11) 1px, transparent 1px);
  background-size: 24px 24px;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 999px; }
.skip { position: absolute; top: -100px; left: 8px; z-index: 100; padding: 8px 12px; background: var(--ink); color: #fff; border-radius: 8px; }
.skip:focus { top: 8px; }

/* ---------- Top bar ---------- */
.bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  height: var(--bar-h);
  display: flex; align-items: center; gap: 28px;
  padding: 0 26px;
  background: rgba(248, 250, 249, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.crumbs { display: flex; align-items: center; gap: 6px; white-space: nowrap; min-width: 0; flex: 1; }
.crumb {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  border: 1px solid transparent; background: none; color: var(--ink);
  font-size: 13.5px; font-weight: 600; cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  animation: crumb-in 0.35s var(--ease) backwards;
}
.crumb:hover { border-color: var(--line); background: var(--surface); }
.crumb[disabled] { cursor: default; border-color: var(--gc, var(--line)); background: var(--surface); }
.crumb i { width: 9px; height: 9px; border-radius: 50%; background: var(--gc, #13c590); flex: none; }
.crumb-sep { color: var(--line); font-size: 16px; animation: crumb-in 0.35s var(--ease) backwards; }
@keyframes crumb-in { from { opacity: 0; transform: translateX(-6px); } }

.eras { display: flex; gap: 16px; margin: 0; padding: 0; list-style: none; font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.eras li { display: flex; align-items: center; gap: 7px; }
.eras i { width: 9px; height: 9px; border-radius: 50%; }
.eras i[data-era="current"] { background: #13c590; }
.eras i[data-era="earlier"] { background: #5b8def; }
.eras i[data-era="bench"] { background: #f2a541; }

.bar-links { display: flex; gap: 16px; font-size: 13px; }
.bar-links a { color: var(--ink); text-decoration: none; border-bottom: 1px solid transparent; }
.bar-links a:hover { border-color: var(--ink); }

/* ---------- Board ---------- */
.board {
  position: fixed; top: var(--bar-h); left: 0; right: 0; bottom: 0;
  overflow: hidden;
  transform-origin: var(--zx, 50%) var(--zy, 50%);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.45s ease 0.15s;
}
.board.is-zoomed { transform: scale(2.8); opacity: 0; pointer-events: none; }

.lanes { position: absolute; inset: 0; display: flex; }
.lane {
  flex: 1; position: relative;
  border-right: 1px solid rgba(16, 18, 22, 0.06);
  background: linear-gradient(180deg, color-mix(in srgb, var(--gc) 8%, transparent), transparent 42%);
  transition: background 0.45s, opacity 0.35s;
}
.lane:last-child { border-right: 0; }
.lane.is-on { background: linear-gradient(180deg, color-mix(in srgb, var(--gc) 17%, transparent), color-mix(in srgb, var(--gc) 4%, transparent)); }
.lane.is-off { opacity: 0.45; }
.lane-head {
  position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 10px; border-radius: 999px;
  border: 1px solid transparent; background: none; color: var(--ink);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase;
  white-space: nowrap; cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.lane-head:hover { border-color: var(--line); background: var(--surface); }
.lane-head.is-solo { border-color: var(--gc); background: var(--surface); }
.lane-head i { width: 9px; height: 9px; border-radius: 50%; background: var(--gc); }
.lane-short { display: none; }
.lane-head b { font-weight: 400; color: var(--muted); }

.edges { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.edge {
  fill: none; stroke: var(--ink); stroke-opacity: 0.12; stroke-width: 1.4;
  stroke-dasharray: 1; stroke-dashoffset: 0;
  transition: stroke-opacity 0.3s;
  animation: draw 1.1s var(--ease) calc(0.35s + var(--i) * 45ms) backwards;
}
@keyframes draw { from { stroke-dashoffset: 1; } }
.edge.is-dim { stroke-opacity: 0.035; }
.edge-draw {
  fill: none; stroke: var(--gc); stroke-width: 3; stroke-linecap: round;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  filter: drop-shadow(0 2px 6px color-mix(in srgb, var(--gc) 55%, transparent));
  opacity: 0;
  /* quick to leave, unhurried to draw */
  transition: stroke-dashoffset 0.15s ease, opacity 0.15s ease;
}
.edge-draw.is-on { stroke-dashoffset: 0; opacity: 1; transition: stroke-dashoffset 0.55s var(--ease), opacity 0.2s; }

/* ---------- Orbs ---------- */
.nodes { position: absolute; inset: 0; }
.node {
  position: absolute; left: 0; top: 0;
  width: var(--size); height: var(--size);
  margin: calc(var(--size) / -2) 0 0 calc(var(--size) / -2);
  color: inherit; text-decoration: none;
  transition: opacity 0.2s, filter 0.2s;
  z-index: 2;
  outline: none;
}
.node.is-dim { opacity: 0.32; filter: saturate(0.25); }
.node.is-off { opacity: 0.18; filter: saturate(0); pointer-events: none; }
.node.is-active { z-index: 5; }
.node-float {
  position: absolute; inset: 0;
  animation: float 7s ease-in-out calc(var(--i) * -0.9s) infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
.node-orb {
  position: absolute; inset: 0; border-radius: 50%; overflow: hidden;
  background: var(--surface);
  box-shadow: 0 0 0 4px var(--paper), 0 0 0 5px var(--line), 0 16px 40px rgba(16, 18, 22, 0.16);
  transition: transform 0.3s var(--ease), box-shadow 0.3s;
  animation: bloom 0.7s var(--ease) calc(0.1s + var(--i) * 55ms) backwards;
}
@keyframes bloom { from { transform: scale(0.3); opacity: 0; } }
.node-orb.is-glyph { background: linear-gradient(145deg, color-mix(in srgb, var(--gc) 22%, #fff), #fff 70%); }
.node-orb img, .node-orb svg { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.node-orb svg { padding: 20%; }
.node-orb::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.24), transparent 45%); pointer-events: none; }
.node-era { position: absolute; right: 0; bottom: 0; width: 22%; height: 22%; border-radius: 50%; background: var(--ec); box-shadow: 0 0 0 3px var(--paper); z-index: 2; }
.node:hover .node-orb, .node.is-active .node-orb, .node:focus-visible .node-orb {
  transform: scale(1.14);
  box-shadow: 0 0 0 4px var(--paper), 0 0 0 6px var(--gc), 0 28px 60px rgba(16, 18, 22, 0.26);
}
.node.is-neighbor .node-orb { box-shadow: 0 0 0 4px var(--paper), 0 0 0 5px var(--gc), 0 16px 40px rgba(16, 18, 22, 0.16); }

/* captions sit beside the orb (never under it) so nothing stacks */
.node-cap {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: var(--capw, 150px);
  display: flex; flex-direction: column; gap: 3px;
  pointer-events: none;
  animation: cap-in 0.5s var(--ease) calc(0.35s + var(--i) * 55ms) backwards;
}
@keyframes cap-in { from { opacity: 0; transform: translateY(-50%) translateX(var(--capdx, -6px)); } }
.node-cap.is-right { left: calc(100% + 14px); text-align: left; --capdx: -6px; }
.node-cap.is-left { right: calc(100% + 14px); text-align: right; align-items: flex-end; --capdx: 6px; }
.node-title {
  display: inline-block; max-width: 100%;
  font-size: 13px; font-weight: 620; line-height: 1.25; letter-spacing: -0.005em;
  padding: 2px 8px; border-radius: 10px; background: rgba(248, 250, 249, 0.88);
  transition: font-size 0.25s, color 0.25s;
}
.node.is-active .node-title { font-size: 14.5px; }
.node-sub {
  display: inline-block; max-width: 100%;
  font-size: 11.5px; line-height: 1.3; color: var(--ink-soft);
  padding: 1px 8px; border-radius: 10px; background: rgba(248, 250, 249, 0.88);
  opacity: 0; transform: translateY(-3px);
  transition: opacity 0.3s, transform 0.3s;
}
.node.is-active .node-sub, .node.is-neighbor .node-sub { opacity: 1; transform: none; }
.node.is-neighbor .node-sub { color: var(--gc); font-weight: 560; }
.node.is-dim .node-cap { opacity: 0.5; }

.g-fill { fill: rgba(16, 18, 22, 0.05); stroke: var(--gc); stroke-width: 2.5; stroke-linejoin: round; }
.g-line { fill: none; stroke: var(--gc); stroke-width: 2.5; stroke-linecap: round; opacity: 0.8; }
.g-tick { fill: none; stroke: var(--gc); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.g-dot { fill: var(--gc); }

/* ---------- Detail ---------- */
.detail {
  position: fixed; top: var(--bar-h); left: 0; right: 0; bottom: 0; z-index: 50;
  overflow: auto;
  background: radial-gradient(circle at 30% 45%, color-mix(in srgb, var(--gc) 16%, transparent), transparent 40rem), var(--paper);
  animation: fade 0.4s ease 0.2s backwards;
}
.detail[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } }
.detail-close {
  position: absolute; top: 18px; right: 26px; z-index: 2;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px 8px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  font-size: 13px; cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
}
.detail-close:hover { border-color: var(--ink); transform: translateX(-2px); }
.detail-close span:first-child { font-size: 18px; line-height: 1; }
.detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
  min-height: 100%;
  max-width: 1240px; margin: 0 auto;
  padding: 40px min(6vw, 72px);
}
.detail-media { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.detail-sphere { position: relative; width: min(56vh, 500px, 100%); aspect-ratio: 1; }
.detail-ring {
  position: absolute; inset: -18px; border-radius: 50%;
  border: 1.5px dashed color-mix(in srgb, var(--gc) 70%, transparent);
  animation: spin 40s linear infinite, fade 1s ease 0.5s backwards;
}
@keyframes spin { to { transform: rotate(360deg); } }
.detail-main {
  position: absolute; inset: 0;
  border-radius: 50%; overflow: hidden;
  background: var(--surface);
  box-shadow: 0 0 0 6px var(--paper), 0 0 0 8px var(--gc), 0 40px 100px rgba(16, 18, 22, 0.28);
  animation: bloom-big 0.75s cubic-bezier(0.2, 0.9, 0.2, 1.04) 0.18s backwards;
}
@keyframes bloom-big { from { transform: scale(0.3); opacity: 0; } }
.detail-main img, .detail-main svg { width: 100%; height: 100%; object-fit: cover; display: block; }
.detail-main svg { padding: 18%; }
.detail-main.is-glyph { background: linear-gradient(145deg, color-mix(in srgb, var(--gc) 26%, #fff), #fff 70%); }
.detail-main img.is-swapping { animation: swap 0.45s var(--ease); }
@keyframes swap { from { opacity: 0; transform: scale(1.05); } }
.detail-strip { display: flex; gap: 14px; }
.detail-strip button {
  width: 84px; height: 84px; padding: 0; border-radius: 50%; overflow: hidden;
  border: 3px solid var(--paper); outline: 1px solid var(--line); background: var(--surface); cursor: pointer;
  box-shadow: 0 12px 30px rgba(16, 18, 22, 0.14);
  transition: transform 0.25s var(--ease), outline-color 0.25s, outline-width 0.25s;
  animation: bloom 0.6s var(--ease) backwards;
}
.detail-strip button:hover { transform: translateY(-3px); outline-color: var(--gc); }
.detail-strip button.is-on { transform: scale(1.1); outline: 2px solid var(--gc); }
.detail-strip button:focus-visible { outline: 2px solid var(--ink); }
.detail-strip img { width: 100%; height: 100%; object-fit: cover; display: block; }
.detail-text { animation: rise 0.5s var(--ease) 0.3s backwards; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.detail-eyebrow { margin: 0 0 8px; display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gc); }
.detail-eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: var(--gc); }
.detail-eyebrow b { font-weight: 400; color: var(--muted); }
.detail h2 { margin: 0 0 12px; font-size: clamp(30px, 3.6vw, 48px); line-height: 1.02; letter-spacing: -0.03em; }
.detail-blurb { margin: 0; font-size: 16px; line-height: 1.6; color: var(--ink-soft); max-width: 52ch; }
.facts { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; }
.facts li { padding: 5px 12px; border-radius: 999px; font-size: 12.5px; background: var(--surface); border: 1px solid var(--line); }
.detail-label { margin: 28px 0 10px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.connections { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.connection {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  padding: 8px 14px 8px 8px; border-radius: 18px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.connection:hover { border-color: var(--rc); transform: translateX(4px); box-shadow: 0 10px 30px rgba(16, 18, 22, 0.08); }
.connection img, .connection svg { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; box-shadow: 0 0 0 2px var(--rc); flex: none; transition: transform 0.2s; }
.connection:hover img, .connection:hover svg { transform: scale(1.08); }
.connection svg { padding: 8px; background: color-mix(in srgb, var(--rc) 18%, #fff); }
.connection strong { display: block; font-size: 14px; }
.connection small { color: var(--muted); font-size: 12.5px; }
.connection em { font-style: normal; font-weight: 600; color: var(--rc); }
.cta {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 28px; padding: 12px 20px; border-radius: 999px;
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 600; text-decoration: none;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.cta::after { content: "→"; transition: transform 0.2s; }
.cta:hover { background: var(--gc); color: var(--ink); }
.cta:hover::after { transform: translateX(3px); }

/* ---------- Fallback ---------- */
.fallback { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.fallback:focus-within { position: fixed; inset: auto 0 0 0; width: auto; height: auto; padding: 16px 32px; background: var(--surface); z-index: 70; }
.fallback ul { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0; padding: 0; list-style: none; }

/* ---------- Phone: groups stacked as bands, the board scrolls ---------- */
.board.is-narrow { overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; }
.board.is-narrow .lanes { flex-direction: column; height: var(--total); }
.board.is-narrow .lane {
  flex: none;
  border-right: 0; border-bottom: 1px solid rgba(16, 18, 22, 0.06);
  background: linear-gradient(90deg, color-mix(in srgb, var(--gc) 9%, transparent), transparent 70%);
}
.board.is-narrow .lane.is-on { background: linear-gradient(90deg, color-mix(in srgb, var(--gc) 18%, transparent), color-mix(in srgb, var(--gc) 4%, transparent)); }
.board.is-narrow .lane-head { top: 12px; left: 14px; transform: none; }
.board.is-narrow .edges, .board.is-narrow .nodes { height: var(--total); }
.board.is-narrow .edges { bottom: auto; }
.board.is-narrow .node-title { font-size: 13.5px; }
.board.is-narrow .node-sub { font-size: 12px; }

@media (max-width: 640px) {
  :root { --bar-h: 54px; }
  .bar { padding: 0 12px; gap: 10px; }
  .eras, .bar-links { display: none; }
  .crumb { font-size: 12.5px; padding: 5px 10px; }
  .crumb-group, .crumb-group + .crumb-sep { display: none; }
  .detail-close { top: 12px; right: 12px; padding: 7px 10px; }
  .detail-close-text { display: none; }
  .detail-grid { grid-template-columns: 1fr; gap: 24px; padding: 60px 18px 40px; align-content: start; }
  .detail-sphere { width: min(60vw, 280px); }
  .detail-strip button { width: 58px; height: 58px; }
  .detail h2 { font-size: 28px; }
  .detail-blurb { font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  .board, .detail, .detail-main, .detail-ring, .detail-strip button, .detail-text, .edge-draw, .edge, .node-orb, .node-float, .node-cap, .crumb, .crumb-sep { transition: none; animation: none; }
}

/* landing page: keep the About link reachable on phones */
@media (max-width: 640px) {
  .bar-links { display: flex; }
  .bar-links a:not(:first-child) { display: none; }
}