body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: #ffddee;
  background-size: cover;
  display: block;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
}

canvas {
  width: 100%;
  height: 100%;
  border: 2px solid #333;
  image-rendering: pixelated;
  background: #d9d4c7;
}

#gameContainer {
  width: 720px;
  height: 480px;
  border: none;
  z-index: 1;
  background: transparent;
  position: relative;
  background-color: transparent;
  margin-top: 0;
  padding-top: 10px;
}

#gameWrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0;
}

#gameArea {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0;
  margin: 0;
  background: none;
}

#topHUD {
  display: flex;
  gap: 12px;
  padding: 6px 16px;
  background: #111;
  color: #fff;
  font-weight: bold;
  font-size: 16px;
  border-radius: 0 0 12px 12px;
  width: 100%;
  max-width: 720px;
  justify-content: center;
}

.highlight {
  background: #ff0;
  color: #000;
  font-weight: bold;
  padding: 2px 4px;
  border-radius: 4px;
}

#levelName {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-weight: bold;
  font-size: 16px;
  color: #333;
}

button {
  background: #eee;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
}
button:hover {
  background: #ddd;
}

#inventoryDisplay {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(255, 255, 255, 0.85);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 10;
  border: 2px solid #9c27b0;
}

.backpack-title {
  font-weight: bold;
  margin-bottom: 6px;
  font-size: 14px;
  color: #6a1b9a;
}

.backpack-icon {
  font-size: 20px;
  margin-right: 6px;
}

.backpack-empty {
  font-size: 14px;
  color: #888;
}

.backpack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.item-icon {
  font-size: 20px;
  line-height: 1;
}

#upgradeTopBar {
  width: 100%;
  background: #eef6ff;
  padding: 12px 20px;
  text-align: center;
  border-bottom: 2px solid #0077ff;
  top: 0;
  z-index: 1000;
  position: sticky;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 12px;
  backdrop-filter: blur(4px);
}

#upgradeHeader {
  font-weight: 700;
  color: #0077ff;
  margin-bottom: 6px;
}

#upgradePanel {
  display: grid;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
  font-weight: bold;
  font-size: 14px;
  color: #333;
}

#upgradePanel .upgrade-group {
  flex: 1 1 300px; /* grow, shrink, base width */
  min-width: 260px; /* prevents squishing too much */
}

@media (max-width: 900px) {
  #upgradePanel {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }
}
@media (max-width: 600px) {
  #upgradePanel {
    grid-template-columns: 1fr;
  }
}

.upgrade-option {
  font-weight: bold;
  font-size: 14px;
  color: #333;
}

#upgradePanel button.highlight {
  background: #fff952;
  color: #000;
  font-weight: bold;
  box-shadow: 0 0 6px #ff0;
}

#upgradePanel button {
  background-color: #fffbcc;
  border: 1px solid #d4b900;
  font-weight: bold;
  border-radius: 6px;
  padding: 4px 10px;
  margin-top: 6px;
  cursor: pointer;
  transition: background 0.3s ease;
}

#upgradePanel button:hover {
  background-color: #fff38a;
}

#upgradePanel h2,
#upgradePanel h3 {
  margin: 0 0 6px 0;
  font-size: 16px;
  color: #0077ff;
  text-align: center;
}

#upgradePanel ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 14px;
  line-height: 1.4;
  color: #333;
  text-align: center;
}

#upgradePanel li {
  margin-bottom: 8px;
}

.upgrade-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 160px;
  padding: 8px;
}

.upgrade-group h3 {
  margin-bottom: 6px;
  font-size: 16px;
  color: #0077ff;
}

/* 🟡 Cage Info - Minimal */
.cage-panel {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-size: 14px;
  font-weight: 600;
  color: #333;
  background: none;
  padding: 0;
  border: none;
  box-shadow: none;
  pointer-events: none;
}
.item-icon,
.popup-message {
  font-family: "Segoe UI Emoji", "Segoe UI", sans-serif;
}

@media (max-width: 800px) {
  #gameArea {
    flex-direction: column;
    align-items: center;
  }

  #topHUD {
    flex-wrap: wrap;
    font-size: 14px;
    gap: 8px;
  }
}
/* 🟣 Action Feed Popups */
#actionFeed {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 20;
}

.action-popup {
  background: #fdf6e3;
  color: #5e2a84;
  padding: 8px 14px;
  margin-top: 10px;
  border-radius: 10px;
  border: 2px solid #aa00ff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  font-weight: bold;
  font-size: 15px;
  font-family: "Comic Neue", "Segoe UI", sans-serif;
  animation: fadeOutPopup 4.5s ease-in-out forwards;
}

.action-popup.fade-out {
  opacity: 0;
  transition: opacity 0.5s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.popup-message {
  background: rgba(100, 0, 150, 0.9);
  color: white;
  padding: 6px 12px;
  margin-bottom: 8px;
  border-radius: 6px;
  font-weight: bold;
  font-size: 14px;
  text-align: center;
  animation: fadeOut 3s forwards;
  transition: opacity 1s ease-out;
}

@keyframes fadeOutPopup {
  0% {
    opacity: 1;
    transform: translateY(0px);
  }
  80% {
    opacity: 1;
    transform: translateY(-10px);
  }
  100% {
    opacity: 0;
    transform: translateY(-20px);
  }
}