:root {
  color-scheme: dark;
  --bg: #12151a;
  --bg2: #1a1f27;
  --bg3: #242a34;
  --border: #3a4250;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #7dcec4;
  --ink: #15333b;
  --cream: #f3f0e7;
  --amber: #e6b15a;
  --danger: #f0a8a8;
  --water: #3aa0c8;
  --heat: #e25a32;
  --circ: #1faf78;
  --drain: #b58362;
}
* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  max-width: 76rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 4.75rem;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--accent); }
h1 { font-size: 1.7rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.05rem; margin: 0 0 0.45rem; }
.hub-back { display: inline-block; margin: 0.45rem 0 0.75rem; text-decoration: none; font-weight: 700; }
.rev {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--accent);
  border-radius: 999px;
  padding: 0.12rem 0.55rem;
  margin: 0 0.35rem 0.45rem 0;
}
.rev.warn { background: var(--amber); }
.meta { color: var(--muted); margin: 0 0 0.9rem; }
.claim {
  background: #10262e;
  border: 1px solid #1d4a52;
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  margin: 0 0 1rem;
}
.claim strong { color: var(--cream); }
.claim p { margin: 0.2rem 0 0; color: #b7d4d0; }
.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 20.5rem;
  gap: 0.85rem;
  align-items: start;
}
.toolbar, .paths {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 0.55rem;
}
.toolbar button, .paths button, .ghost {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  min-height: 40px;
  font: inherit;
  cursor: pointer;
}
.toolbar button[aria-pressed="true"], .paths button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--ink);
  background: var(--accent);
}
.paths button[data-path="water"][aria-pressed="true"] { background: var(--water); border-color: var(--water); color: #fff; }
.paths button[data-path="heat"][aria-pressed="true"] { background: var(--heat); border-color: var(--heat); color: #fff; }
.paths button[data-path="salt"][aria-pressed="true"] { background: #d9d0b4; border-color: #d9d0b4; color: var(--ink); }
.paths button[data-path="circ"][aria-pressed="true"] { background: var(--circ); border-color: var(--circ); color: #06281c; }
.paths button[data-path="drain"][aria-pressed="true"] { background: var(--drain); border-color: var(--drain); color: #1c100c; }
button:focus-visible, a:focus-visible, .part:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
#view {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  min-height: 24rem;
  max-height: 54vh;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  touch-action: none;
  background: #d5d8dc;
}
#view canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.leaders, .name-layer { position: absolute; inset: 0; }
.leaders { width: 100%; height: 100%; pointer-events: none; }
.name-layer { pointer-events: none; }
.name-layer button {
  position: absolute;
  pointer-events: auto;
  width: 10.6rem;
  text-align: left;
  background: var(--cream);
  color: var(--ink);
  border: 1px solid #9db6b6;
  border-radius: 8px;
  padding: 0.28rem 0.45rem;
  font: 600 0.78rem/1.25 system-ui, sans-serif;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(16, 38, 46, 0.12);
}
.name-layer button.on { border-color: #ed7946; box-shadow: inset 3px 0 0 #ed7946; }
.name-layer button.float {
  width: auto;
  max-width: 11rem;
  transform: translate(-50%, calc(-100% - 10px));
}
.legend {
  position: absolute;
  left: 7.4rem;
  right: 0.55rem;
  bottom: 0.55rem;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.7rem;
  background: rgba(16, 38, 46, 0.88);
  color: #eee6d4;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.75rem;
  pointer-events: none;
}
.legend i {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 2px;
  margin-right: 0.28rem;
  vertical-align: 1px;
}
.view-status {
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  top: 0.7rem;
  z-index: 3;
  background: rgba(16, 38, 46, 0.92);
  color: var(--cream);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
}
.view-status p { margin: 0.2rem 0 0; color: #b7d4d0; }
.view-status[hidden] { display: none; }
.hint, .muted { color: var(--muted); }
.hint { font-size: 0.82rem; margin: 0.4rem 0 0; }
.side {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.75rem;
}
.side h2 { margin-bottom: 0.35rem; }
.part-list { display: flex; flex-direction: column; gap: 0.35rem; max-height: 28rem; overflow: auto; }
.part {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 0.55rem;
  width: 100%;
  text-align: left;
  background: var(--bg);
  color: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.55rem;
  font: inherit;
  cursor: pointer;
}
.part .swatch {
  grid-row: 1 / span 2;
  align-self: center;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.35);
}
.part .sub { color: var(--muted); font-size: 0.75rem; }
.part[aria-pressed="true"] { border-color: var(--accent); }
.part.is-absent { opacity: 0.55; }
#part-about { margin: 0.7rem 0 0; }
.tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  margin: 1.1rem 0 0.8rem;
}
.tabs button {
  background: none;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--muted);
  font: inherit;
  min-height: 40px;
  padding: 0.45rem 0.85rem;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
}
.tabs button[aria-selected="true"] {
  color: var(--text);
  background: var(--bg2);
  border-color: var(--border);
  box-shadow: inset 0 3px 0 var(--accent);
}
.panel[hidden] { display: none; }
.card, .split article {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin: 0 0 0.75rem;
}
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.split article h3 { margin: 0 0 0.35rem; }
.card ol, .card ul { margin: 0.35rem 0 0; padding-left: 1.15rem; }
.card li { margin: 0.28rem 0; }
.plates { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; }
.plates figure { margin: 0; }
.plates img, .card img { width: 100%; height: auto; border-radius: 8px; background: #d5d8dc; }
figcaption { color: var(--muted); font-size: 0.82rem; margin-top: 0.35rem; }
.dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.15rem 0.8rem;
  align-items: baseline;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
}
.dl span { color: var(--muted); font-size: 0.85rem; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.86em; }
#error:not(:empty) {
  color: var(--danger);
  background: #2a1717;
  border: 1px solid #6b3030;
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  margin-top: 0.7rem;
}
@media (max-width: 900px) {
  .stage, .split, .plates { grid-template-columns: 1fr; }
  .part-list { max-height: none; }
  #view { max-height: none; aspect-ratio: 1 / 1; min-height: 52dvh; }
  .name-layer button { font-size: 0.72rem; }
  .toolbar, .paths { width: 100%; }
  .toolbar button, .paths button { flex: 1 1 7.2rem; }
}
@media (max-width: 640px) {
  body { padding: 0.7rem 0.7rem 4.75rem; }
  h1 { font-size: 1.35rem; }
  .toolbar button, .paths button { padding: 0.4rem 0.6rem; }
  .legend { left: 0.45rem; right: 0.45rem; bottom: 3.1rem; }
}
@media (prefers-reduced-motion: reduce) {
  .leaders { display: none; }
}