.arch-cube {
  --cube-line: var(--ink-3, #53627b);
  --cube-a: color-mix(in srgb, var(--play-stage, #fff) 70%, #e9ad35);
  --cube-b: color-mix(in srgb, var(--play-stage, #fff) 70%, #69a6ed);
  --cube-c: color-mix(in srgb, var(--play-stage, #fff) 70%, #4bbea0);
  display: grid; gap: 12px; min-width: 0;
  color: var(--ink, #16213a);
}
.arch-cube p { margin: 0; }
.arch-cube .arch-cube-intro { line-height: 1.55; }
.arch-cube .arch-cube-stage {
  display: grid; place-items: center; min-width: 0; overflow: hidden;
  border: 1px solid var(--play-line, #cbd5e1); border-radius: 18px;
  background: var(--play-stage, #fff); cursor: grab;
  touch-action: none; user-select: none; -webkit-user-select: none;
}
.arch-cube .arch-cube-stage.arch-cube-dragging { cursor: grabbing; }
.arch-cube .arch-cube-stage:focus-visible { outline: 3px solid var(--arch-focus, #2563eb); outline-offset: 3px; }
.arch-cube .arch-cube-stage svg { display: block; width: 100%; max-width: 430px; height: auto; }
.arch-cube .arch-cube-face { stroke: var(--cube-line); stroke-width: 1.8; stroke-linejoin: round; }
.arch-cube .arch-cube-face-a { fill: var(--cube-a); }
.arch-cube .arch-cube-face-b { fill: var(--cube-b); }
.arch-cube .arch-cube-face-c { fill: var(--cube-c); }
.arch-cube .arch-cube-highlight { stroke: var(--ink, #16213a); stroke-width: 3; }
.arch-cube .arch-cube-number {
  fill: var(--ink, #16213a); stroke: none; paint-order: normal;
  font: 700 38px/1 system-ui, sans-serif; pointer-events: none;
}
.arch-cube .arch-cube-transparent .arch-cube-face { fill-opacity: .14; stroke-width: 1.7; }
.arch-cube .arch-cube-transparent .arch-cube-face-a { fill: #e9ad35; }
.arch-cube .arch-cube-transparent .arch-cube-face-b { fill: #69a6ed; }
.arch-cube .arch-cube-transparent .arch-cube-face-c { fill: #4bbea0; }
.arch-cube .arch-cube-transparent .arch-cube-face.arch-cube-back { stroke-dasharray: 5 4; stroke-opacity: .65; fill-opacity: .08; }
.arch-cube .arch-cube-transparent .arch-cube-face.arch-cube-highlight { fill-opacity: .3; stroke-opacity: 1; stroke-width: 2.6; }
.arch-cube .arch-cube-leader { fill: none; stroke: var(--cube-line); stroke-width: 1.5; }
.arch-cube .arch-cube-leader.arch-cube-back { stroke-dasharray: 4 3; }
.arch-cube .arch-cube-anchor { fill: var(--cube-line); stroke: var(--play-stage, #fff); stroke-width: 1; }
.arch-cube .arch-cube-anchor.arch-cube-back { fill: var(--play-stage, #fff); stroke: var(--cube-line); stroke-width: 1.5; }
.arch-cube .arch-cube-pair-axis { stroke: var(--ink, #16213a); stroke-width: 2.5; stroke-dasharray: 3 4; }
.arch-cube .arch-cube-pair-selected .arch-cube-leader:not(.arch-cube-highlight) { opacity: .38; }
.arch-cube .arch-cube-leader.arch-cube-highlight { stroke: var(--ink, #16213a); stroke-width: 2.5; }
.arch-cube .arch-cube-callout rect { stroke: var(--cube-line); stroke-width: 1.5; }
.arch-cube .arch-cube-callout-a rect { fill: var(--cube-a); }
.arch-cube .arch-cube-callout-b rect { fill: var(--cube-b); }
.arch-cube .arch-cube-callout-c rect { fill: var(--cube-c); }
.arch-cube .arch-cube-callout.arch-cube-back rect { stroke-dasharray: 5 3; }
.arch-cube .arch-cube-callout.arch-cube-highlight rect { stroke: var(--ink, #16213a); stroke-width: 3; }
.arch-cube .arch-cube-callout .arch-cube-number { font-size: 32px; }
.arch-cube .arch-cube-mode { display: flex; flex-wrap: wrap; gap: 8px; }
.arch-cube .arch-cube-mode button { flex: 1 1 125px; }
.arch-cube .arch-cube-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.arch-cube .arch-cube-rotate { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.arch-cube button {
  min-width: 44px; min-height: 44px; max-width: 100%;
  border: 1px solid var(--cube-line); border-radius: 12px;
  padding: 9px 12px; color: var(--ink, #16213a);
  background: var(--play-stage, #fff); cursor: pointer;
  font: inherit; font-size: 16px; line-height: 1.4; white-space: normal;
}
.arch-cube .arch-cube-rotate button { padding: 5px 14px; font-size: 22px; }
.arch-cube button:hover { border-color: var(--ink, #16213a); }
.arch-cube button[aria-pressed="true"] { background: var(--ink, #16213a); color: var(--on-ink, #fff); border-color: var(--ink, #16213a); box-shadow: inset 0 0 0 1px var(--ink, #16213a); font-weight: 650; }
.arch-cube button:focus-visible { outline: 3px solid var(--arch-focus, #2563eb); outline-offset: 3px; }
.arch-cube .arch-cube-totals { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.arch-cube .arch-cube-totals > div { display: grid; gap: 4px; padding: 12px; background: var(--play-stage, #fff); border: 1px solid var(--play-line, #cbd5e1); border-radius: 12px; }
.arch-cube .arch-cube-small { color: var(--ink-2, #4e586d); font-size: 14px; line-height: 1.4; }
.arch-cube .arch-cube-equation { font-size: 19px; font-variant-numeric: tabular-nums; line-height: 1.5; }
.arch-cube .arch-cube-observation { line-height: 1.55; }
.arch-cube .arch-cube-help { color: var(--ink-2, #4e586d); font-size: 14px; line-height: 1.5; }
.arch-cube .arch-cube-label { font-weight: 650; margin-top: 6px; line-height: 1.5; }
.arch-cube .arch-cube-choices, .arch-cube .arch-cube-pairs { display: flex; flex-wrap: wrap; gap: 8px; }
.arch-cube .arch-cube-choices button, .arch-cube .arch-cube-pairs button { flex: 1 1 125px; }
.arch-cube .arch-cube-flip { justify-self: start; }
.arch-cube [hidden] { display: none; }
.arch-cube .arch-cube-sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
@media (max-width: 480px) {
  .arch-cube .arch-cube-totals { grid-template-columns: 1fr; }
  .arch-cube .arch-cube-totals > div { grid-template-columns: 1fr; gap: 2px; }
  .arch-cube .arch-cube-toolbar { justify-content: space-between; }
  .arch-cube .arch-cube-reset { flex: 1 1 140px; }
}
@media (prefers-reduced-motion: reduce) {
  .arch-cube *, .arch-cube *::before, .arch-cube *::after { transition: none !important; animation: none !important; }
}