/* Lámpaoltó (Lights Out): a dark panel of round lamps; lit ones glow warm amber. */
.lo-grid {
  --n: 5;
  --gap: clamp(6px, 1.8vw, 12px);
  display: grid;
  gap: var(--gap);
  padding: clamp(12px, 3.4vw, 22px);
  border-radius: 26px;
  background: #1c1c1e;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .06), inset 0 1px 0 rgba(255, 255, 255, .06);
  touch-action: manipulation;
  transition: background-color .6s var(--ease-out);
}
.lo-row { display: grid; grid-template-columns: repeat(var(--n), 1fr); gap: var(--gap); }

.lo-lamp {
  position: relative;
  aspect-ratio: 1;
  margin: 0; padding: 0; border: 0;
  border-radius: 50%;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  /* Off: a dim grey glass. */
  background:
    radial-gradient(circle at 35% 28%, rgba(255, 255, 255, .12), rgba(255, 255, 255, 0) 42%),
    #2c2c2e;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .07), inset 0 -2px 5px rgba(0, 0, 0, .3);
  transition: background .25s var(--ease-out), box-shadow .25s var(--ease-out), transform .2s var(--ease-spring);
}
.lo-lamp.lo-on {
  background:
    radial-gradient(circle at 35% 28%, rgba(255, 255, 255, .8), rgba(255, 255, 255, 0) 36%),
    radial-gradient(circle at 50% 55%, #fff1b8, #ffc83d 48%, #f59e0b 85%);
  box-shadow: 0 0 22px 2px rgba(255, 190, 50, .45), 0 0 50px 8px rgba(245, 158, 11, .16),
    inset 0 -3px 6px rgba(190, 100, 0, .3);
}
@media (hover: hover) { .lo-lamp:not(.lo-on):hover { background: radial-gradient(circle at 35% 28%, rgba(255, 255, 255, .14), rgba(255, 255, 255, 0) 42%), #3a3a3c; } }
.lo-lamp:active { transform: scale(.9); }
.lo-lamp:focus-visible { outline: 2px solid var(--game); outline-offset: 3px; }
.lo-lamp.lo-flip { animation: lo-flip .42s var(--ease-spring) both; animation-delay: calc(var(--d, 0) * 1ms); }
@keyframes lo-flip {
  0% { transform: scale(.82); }
  100% { transform: scale(1); }
}
.lo-lamp.lo-hint { animation: lo-pulse 1.1s ease-in-out infinite; }
@keyframes lo-pulse {
  0%, 100% { outline: 2px solid #fff; outline-offset: 2px; }
  50% { outline: 2px solid #fff; outline-offset: 6px; }
}

/* Solved: the panel settles into a quiet black. */
.lo-grid.lo-solved { background: #111113; }

.lo-status {
  margin: 14px auto 0; max-width: min(600px, 100cqw);
  text-align: center; color: var(--muted); font-weight: 500; font-size: .95rem;
}
.lo-status.lo-done {
  width: fit-content; padding: 9px 18px; border-radius: 999px;
  background: rgba(255, 255, 255, .1); color: #fff;
}
.lo-status b { color: #fff; font-weight: 650; }
.lo-status.lo-done b:first-child { color: var(--good); }

@media (prefers-reduced-motion: reduce) {
  .lo-lamp.lo-hint { animation: none; outline: 2px solid #fff; outline-offset: 2px; }
}