:root {
  --bg: #f5f1e8;
  --room: #d9c7a7;
  --room-floor: #b89878;
  --accent: #4a7fb5;
  --accent-dark: #2f5d8f;
  --good: #4caf50;
  --bad: #e74c3c;
  --shadow: rgba(0, 0, 0, 0.15);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: #222;
  min-height: 100vh;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: 1.6rem;
  color: var(--accent-dark);
}

.hud {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.stat {
  background: white;
  padding: 8px 12px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow);
  font-weight: 600;
  font-size: 0.95rem;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.2s;
}

button:hover { background: var(--accent-dark); }

main {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 16px;
}

@media (max-width: 800px) {
  main { grid-template-columns: 1fr; }
}

.room {
  position: relative;
  background: linear-gradient(to bottom, var(--room) 0%, var(--room) 60%, var(--room-floor) 60%, var(--room-floor) 100%);
  border-radius: 12px;
  min-height: 600px;
  box-shadow: inset 0 -8px 20px rgba(0,0,0,0.1), 0 4px 12px var(--shadow);
  overflow: hidden;
  padding: 16px;
}

.room-label {
  position: absolute;
  top: 12px;
  left: 16px;
  font-size: 0.85rem;
  color: rgba(0,0,0,0.4);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.item {
  position: absolute;
  width: 72px;
  height: 72px;
  cursor: grab;
  user-select: none;
  -webkit-user-drag: element;
  transition: transform 0.15s, filter 0.15s;
  filter: drop-shadow(0 3px 4px rgba(0,0,0,0.25));
}

.item:hover {
  transform: scale(1.1) rotate(-3deg);
}

.item.dragging {
  cursor: grabbing;
  opacity: 0.5;
  transform: scale(1.15);
}

.item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-content: start;
}

@media (max-width: 800px) {
  .zones { grid-template-columns: 1fr 1fr 1fr; }
}

.zone {
  background: white;
  border-radius: 12px;
  padding: 14px 8px;
  text-align: center;
  border: 3px dashed transparent;
  box-shadow: 0 2px 6px var(--shadow);
  transition: all 0.2s;
  min-height: 110px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.zone.over {
  transform: scale(1.05);
  border-color: var(--accent);
  background: #eaf3ff;
}

.zone.correct-flash {
  border-color: var(--good);
  background: #e8f7ea;
  animation: pop 0.4s ease;
}

.zone.wrong-flash {
  border-color: var(--bad);
  background: #fde8e6;
  animation: shake 0.4s ease;
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.zone-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 6px;
  pointer-events: none;
}

.zone-label {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent-dark);
}

.zone-hint {
  font-size: 0.75rem;
  color: #888;
  margin-top: 2px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.overlay.hidden { display: none; }

.overlay-card {
  background: white;
  border-radius: 16px;
  padding: 32px 40px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
  max-width: 90%;
}

.overlay-card h2 {
  margin: 0 0 8px;
  color: var(--good);
  font-size: 2rem;
}

.overlay-card p {
  margin: 8px 0;
  color: #444;
}

.overlay-card button {
  margin-top: 16px;
  font-size: 1.05rem;
  padding: 12px 24px;
}