/* 3d-glow — tokens + figure styles. Override the --g-* tokens per site; keep one accent. */
/* Default theme (emerald) on :root so data-glow-theme on any ancestor (see themes.css) can override it. */
:root {
  --g-bg: #050807; --g-panel: #0a110e; --g-edge: #16241e;
  --g-body: #07130e; --g-side: #050e0a; --g-deck: #0a1a13; --g-recess: #040b08;
  --g-line: #2b5243; --g-detail: #16352a; --g-ink: #7f9d90; --g-ink-hi: #e3f1e9;
  --g-accent: #34d399; --g-accent-hi: #b5f5dc; --g-accent-dim: rgba(52, 211, 153, .10);
  --g-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
.glow-fig { position: relative; display: grid; gap: 8px; color: var(--g-ink); }
.glow-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.glow-stage { display: block; width: 100%; height: auto; touch-action: manipulation; user-select: none; -webkit-user-select: none;
  background: radial-gradient(ellipse 55% 50% at 50% 55%, var(--g-accent-dim), transparent 72%); }
.glow-readout { margin: 0; min-height: 1.4em; font: 11px/1.4 var(--g-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--g-ink); }
.glow-stage text { font-family: var(--g-mono); fill: var(--g-ink); letter-spacing: .08em; }
.glow-stage .t-hi { fill: var(--g-ink-hi); }

.glow-stage .face { fill: var(--g-body); stroke: var(--g-line); stroke-width: 1; vector-effect: non-scaling-stroke; stroke-linejoin: round;
  transition: fill .5s ease-out, stroke .5s ease-out; }
.glow-stage .face.side { fill: var(--g-side); }
.glow-stage .face.top { fill: var(--g-deck); }
.glow-stage .recess { fill: var(--g-recess); stroke: var(--g-line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.glow-stage .detail { fill: none; stroke: var(--g-detail); stroke-width: 1; vector-effect: non-scaling-stroke; }

/* Lamps: windows, LEDs, screens. Lit when they or a parent carry .on */
.glow-stage .lamp { fill: var(--g-detail); transition: fill .35s; }
.glow-stage .on .lamp, .glow-stage .lamp.on { fill: var(--g-accent); filter: url(#g-soft); }
.glow-stage .halo { fill: var(--g-accent); opacity: 0; transition: opacity .5s; filter: url(#g-bloom); pointer-events: none; }
.glow-stage .on .halo, .glow-stage .halo.on { opacity: .28; }

/* Solid lit blocks */
.glow-stage .lit .face { fill: var(--g-accent); stroke: var(--g-accent-hi); }
.glow-stage .lit .face.side { fill: color-mix(in srgb, var(--g-accent) 70%, #000); }
.glow-stage .lit .face.top { fill: var(--g-accent-hi); }
.glow-stage .lit { filter: url(#g-soft); }

/* Wires and travelling pulses (pathLength="100" on each pulse) */
.glow-stage .wire { fill: none; stroke: var(--g-line); stroke-width: 1; vector-effect: non-scaling-stroke; stroke-linecap: round; transition: stroke .4s; }
.glow-stage .on .wire, .glow-stage .wire.on { stroke: var(--g-accent); }
.glow-stage .pulse { fill: none; stroke: var(--g-accent-hi); stroke-width: 2.2; vector-effect: non-scaling-stroke; stroke-linecap: round;
  stroke-dasharray: 10 110; stroke-dashoffset: 10; opacity: 0; }
.glow-stage .on .pulse { opacity: 1; animation: g-flow 2.2s linear infinite; animation-delay: var(--d, 0s); }
.glow-stage .pulse.go { opacity: 1; animation: g-flow .7s linear 1 forwards; }
@keyframes g-flow { from { stroke-dashoffset: 10; } to { stroke-dashoffset: -100; } }

.glow-stage .press { cursor: pointer; outline: none; }
.glow-stage .press:hover .face.top { stroke: var(--g-ink); }
.glow-stage .press:focus-visible .face { stroke: var(--g-accent-hi); stroke-dasharray: 3 2; }
.glow-stage .press:focus-visible text { fill: var(--g-ink-hi); text-decoration: underline; }
/* Optional label halo so text stays readable where it crosses line work. */
.glow-stage .t-halo, .glow-stage .t-halo text { paint-order: stroke; stroke: var(--g-body); stroke-width: 3px; stroke-linejoin: round; }

/* Optional HTML controls a figure appends under the stage */
.glow-controls { display: flex; flex-wrap: wrap; gap: 6px; }
.glow-controls button { font: 11px/1 var(--g-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--g-ink);
  background: transparent; border: 1px solid var(--g-line); border-radius: 999px; padding: 8px 12px; cursor: pointer; }
.glow-controls button:hover { color: var(--g-ink-hi); }
.glow-controls button[aria-pressed="true"] { color: var(--g-ink-hi); border-color: var(--g-accent); box-shadow: 0 0 10px -2px var(--g-accent); }
.glow-controls button:focus-visible { outline: 2px solid var(--g-accent); outline-offset: 2px; }

/* Ambient motion — subtle: halos breathe, lamps flicker like old neon, late windows fade in/out */
.glow-stage .on .halo, .glow-stage .halo.on { animation: g-breathe 4.2s ease-in-out infinite; }
@keyframes g-breathe { 0%, 100% { opacity: .2; } 50% { opacity: .34; } }
.glow-stage .flick { animation: g-flicker 1.1s linear 1; }
@keyframes g-flicker { 0%, 100% { opacity: 1; } 8% { opacity: .35; } 14% { opacity: 1; } 30% { opacity: .55; } 38% { opacity: 1; } }
.glow-stage .lamp.wake { transition: fill .9s ease-in-out; }

@media (prefers-reduced-motion: reduce) {
  .glow-stage .face, .glow-stage .lamp, .glow-stage .halo, .glow-stage .wire { transition: none; }
  .glow-stage .on .pulse, .glow-stage .pulse.go { animation: none; opacity: 0; }
  .glow-stage .on .halo, .glow-stage .halo.on, .glow-stage .flick { animation: none; }
}