.game-circuit-puzzle {
  --green: #4ecf6e;
  --red: #f05a6e;
  --blue: #5a9cf0;
  --cell-size: 72px;
}

.game-circuit-puzzle .header {
  text-align: center;
  padding: 20px 16px 8px;
  width: 100%;
  max-width: 700px;
}

.game-circuit-puzzle .header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--teal), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.game-circuit-puzzle .level-info {
  margin-top: 4px;
  font-size: 0.95rem;
  color: var(--text);
}

.game-circuit-puzzle .level-info .level-name {
  color: var(--gold);
  font-family: 'Fredoka', sans-serif;
  font-weight: 600;
}

/* Board */
.game-circuit-puzzle .board-container {
  position: relative;
  margin: 12px auto;
  padding: 16px;
  background: var(--board-bg);
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.5);
  border: 1px solid var(--muted);
}

.game-circuit-puzzle .board {
  display: grid;
  gap: 3px;
}

.game-circuit-puzzle .cell {
  width: var(--cell-size);
  height: var(--cell-size);
  background: var(--surface);
  border-radius: 8px;
  position: relative;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
  overflow: hidden;
}

.game-circuit-puzzle .cell::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 6px; height: 6px;
  background: var(--muted);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.5;
}

.game-circuit-puzzle .cell.has-component::before { display: none; }

.game-circuit-puzzle .cell:hover:not(.locked) {
  background: #E8E8E6;
  box-shadow: inset 0 0 0 2px rgba(43, 168, 144, 0.3);
}

.game-circuit-puzzle .cell.locked { cursor: default; }

.game-circuit-puzzle .cell.selected-target {
  box-shadow: inset 0 0 0 2px var(--teal);
}

.game-circuit-puzzle .cell.powered .component-visual { filter: brightness(1.3); }

/* Component visuals */
.game-circuit-puzzle .component-visual {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.game-circuit-puzzle .component-visual svg {
  width: 100%;
  height: 100%;
}

/* Tray */
.game-circuit-puzzle .tray-container {
  width: 100%;
  max-width: 700px;
  padding: 0 16px;
}

.game-circuit-puzzle .tray-label {
  font-family: 'Fredoka', sans-serif;
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.game-circuit-puzzle .tray {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px;
  background: var(--surface);
  border-radius: 14px;
  border: 1px solid var(--muted);
  min-height: 70px;
  align-items: center;
}

.game-circuit-puzzle .tray-item {
  width: 60px;
  height: 60px;
  background: var(--board-bg);
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.game-circuit-puzzle .tray-item:hover { transform: scale(1.08); }

.game-circuit-puzzle .tray-item.selected {
  box-shadow: 0 0 0 3px var(--teal), 0 0 16px rgba(62,207,180,0.3);
  transform: scale(1.08);
}

.game-circuit-puzzle .tray-item .count {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  width: 20px; height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Fredoka', sans-serif;
}

.game-circuit-puzzle .tray-item svg { width: 48px; height: 48px; }

/* Hint area */
.game-circuit-puzzle .game-hint {
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text);
  max-width: 500px;
  line-height: 1.4;
}

.game-circuit-puzzle .game-hint strong { color: var(--teal); font-weight: 600; }

/* Controls */
.game-circuit-puzzle .game-controls {
  padding: 8px 16px 20px;
}

/* Button overrides (game-specific styles on top of shared .game-btn) */
.game-circuit-puzzle .game-btn-primary {
  background: linear-gradient(135deg, var(--teal), #2ab89e);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(43,168,144,0.25);
}

.game-circuit-puzzle .game-btn-secondary {
  background: var(--surface);
  color: var(--text-bright);
  border: 1px solid var(--muted);
}

.game-circuit-puzzle .game-btn-accent {
  background: linear-gradient(135deg, var(--gold), #d4ad30);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(212,168,58,0.25);
}

/* Level select overlay */
.game-circuit-puzzle .game-overlay-card {
  max-width: 520px;
  border: 1px solid var(--muted);
}

.game-circuit-puzzle .game-overlay-card h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.game-circuit-puzzle .level-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 20px 0;
}

.game-circuit-puzzle .level-btn {
  aspect-ratio: 1;
  border: 2px solid var(--muted);
  border-radius: 12px;
  background: var(--board-bg);
  color: var(--text-bright);
  font-family: 'Fredoka', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.game-circuit-puzzle .level-btn:hover { border-color: var(--teal); transform: scale(1.05); }
.game-circuit-puzzle .level-btn.completed { border-color: var(--green); background: rgba(78,207,110,0.1); }
.game-circuit-puzzle .level-btn.completed::after {
  content: '\2713';
  font-size: 0.7rem;
  color: var(--green);
}
.game-circuit-puzzle .level-btn.current { border-color: var(--gold); }

/* Win overlay */
.game-circuit-puzzle .win-content h2 { color: var(--gold); }
.game-circuit-puzzle .win-content .stars { font-size: 2rem; margin: 12px 0; }

/* Power flow animation */
@keyframes circuitPuzzlePowerPulse {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.4); }
}

.game-circuit-puzzle .cell.powered-anim .component-visual {
  animation: circuitPuzzlePowerPulse 1.5s ease-in-out infinite;
}

/* Drag and drop */
.game-circuit-puzzle .drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 200;
  opacity: 0.9;
  transform: translate(-50%, -50%) scale(1.15);
  filter: drop-shadow(0 4px 16px rgba(62,207,180,0.4));
  transition: none;
}

.game-circuit-puzzle .cell.drop-target {
  background: #E8E8E6;
  box-shadow: inset 0 0 0 2px var(--teal), 0 0 12px rgba(43,168,144,0.2);
}

.game-circuit-puzzle .cell.drag-source {
  opacity: 0.3;
}

.game-circuit-puzzle .tray-item.drag-source {
  opacity: 0.3;
}

.game-circuit-puzzle .tray.drop-target-tray {
  box-shadow: inset 0 0 0 2px var(--accent), 0 0 12px rgba(240,90,110,0.2);
}

/* Responsive */
@media (max-width: 600px) {
  .game-circuit-puzzle { --cell-size: 56px; }
  .game-circuit-puzzle .header h1 { font-size: 1.4rem; }
  .game-circuit-puzzle .tray-item { width: 50px; height: 50px; }
  .game-circuit-puzzle .tray-item svg { width: 40px; height: 40px; }
  .game-circuit-puzzle .game-overlay-card { padding: 20px; }
  .game-circuit-puzzle .level-grid { grid-template-columns: repeat(4, 1fr); gap: 8px; }
}

@media (max-width: 400px) {
  .game-circuit-puzzle { --cell-size: 48px; }
}