* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
  color: #ffffff;
  overflow: hidden;
}

#gameContainer {
  display: flex;
  height: 100vh;
  width: 100vw;
}

#canvasWrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #0a0e27;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

#pauseOverlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 48px;
  font-weight: bold;
  color: #e94560;
  text-shadow: 0 0 20px rgba(233, 69, 96, 0.8);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

#pauseOverlay.active {
  opacity: 1;
}

#cameraInfo {
  position: absolute;
  top: 15px;
  left: 15px;
  background: rgba(10, 14, 39, 0.85);
  padding: 12px 15px;
  border-radius: 8px;
  border: 2px solid #e94560;
  font-size: 12px;
  line-height: 1.6;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.info-line {
  margin-bottom: 4px;
}

.info-line:last-child {
  margin-bottom: 0;
}

#sidebar {
  width: 380px;
  background: linear-gradient(180deg, #1a1f3a 0%, #0f1228 100%);
  border-left: 3px solid #e94560;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
}

.sidebar-header {
  padding: 12px 20px;
  text-align: right;
}

.text-link-btn {
  background: none;
  border: none;
  color: #4a9eff;
  font-size: 13px;
  cursor: pointer;
  text-decoration: underline;
  transition: color 0.2s;
}

.text-link-btn:hover {
  color: #6bb4ff;
}

.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 15px 20px;
  background: linear-gradient(180deg, #1a1f3a 0%, #151a32 100%);
  border-bottom: 2px solid #e94560;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.top-stat {
  background: rgba(255, 255, 255, 0.05);
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  border: 2px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s;
}

.top-stat:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.top-stat.gold {
  border-color: #ffd700;
}

.top-stat-icon {
  font-size: 24px;
  margin-bottom: 5px;
}

.top-stat-value {
  font-size: 20px;
  font-weight: bold;
  color: #fff;
}

.top-stat.gold .top-stat-value {
  color: #ffd700;
}

.score-display {
  padding: 15px 20px;
  text-align: center;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.score-label {
  font-size: 12px;
  color: #999;
  margin-bottom: 5px;
}

.score-value {
  font-size: 28px;
  font-weight: bold;
  color: #4a9eff;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 15px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.control-btn {
  background: linear-gradient(135deg, #2a2f4a 0%, #1f2438 100%);
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 12px;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.control-btn:hover {
  background: linear-gradient(135deg, #3a3f5a 0%, #2f3448 100%);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.control-btn.pause {
  background: linear-gradient(135deg, #e94560 0%, #d63850 100%);
  border-color: #ff5670;
}

.control-btn.pause:hover {
  background: linear-gradient(135deg, #ff5670 0%, #e94560 100%);
}

.btn-icon {
  font-size: 18px;
}

.btn-text {
  font-size: 11px;
}

.wave-start-btn {
  margin: 15px 20px;
  background: linear-gradient(135deg, #4a9eff 0%, #3a7edf 100%);
  border: 3px solid #5aafff;
  border-radius: 10px;
  padding: 15px;
  color: #fff;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(74, 158, 255, 0.4);
}

.wave-start-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #5aafff 0%, #4a9eff 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(74, 158, 255, 0.6);
}

.wave-start-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.wave-btn-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.wave-btn-icon {
  font-size: 20px;
}

.wave-hotkey {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
}

.wave-preview {
  padding: 10px 20px;
  text-align: center;
  font-size: 12px;
  color: #999;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tag {
  display: inline-block;
  background: rgba(74, 158, 255, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
  margin: 2px;
  font-size: 11px;
  color: #4a9eff;
  border: 1px solid rgba(74, 158, 255, 0.3);
}

#towerInfoPanel {
  display: none;
  background: rgba(26, 31, 58, 0.95);
  border: 2px solid #e94560;
  border-radius: 10px;
  padding: 15px;
  margin: 15px 20px;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
}

#towerInfoPanel.active {
  display: block;
}

.info-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
  padding-bottom: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-icon {
  width: 60px;
  height: 60px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
}

.info-title {
  flex: 1;
}

.info-name {
  font-size: 18px;
  font-weight: bold;
  color: #fff;
}

.info-level {
  font-size: 13px;
  color: #ffd700;
  margin-top: 3px;
}

.close-info {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 24px;
  width: 35px;
  height: 35px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s;
}

.close-info:hover {
  background: rgba(255, 255, 255, 0.2);
}

.info-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 15px;
}

.info-stat-item {
  background: rgba(255, 255, 255, 0.05);
  padding: 10px;
  border-radius: 6px;
  text-align: center;
}

.info-stat-label {
  font-size: 11px;
  color: #999;
}

.info-stat-value {
  font-size: 15px;
  font-weight: bold;
  color: #fff;
}

.upgrade-preview {
  display: block;
  font-size: 12px;
  color: #4aff4a;
  margin-top: 4px;
  font-weight: normal;
}

.info-buttons {
  display: flex;
  gap: 10px;
}

.upgrade-btn,
.sell-btn {
  flex: 1;
  padding: 12px;
  border: 2px solid;
  border-radius: 8px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}

.upgrade-btn {
  background: linear-gradient(135deg, #4aff4a 0%, #3ada3a 100%);
  border-color: #5aff5a;
  color: #0a0e27;
}

.upgrade-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #5aff5a 0%, #4aff4a 100%);
  transform: translateY(-2px);
}

.upgrade-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.sell-btn {
  background: linear-gradient(135deg, #e94560 0%, #d63850 100%);
  border-color: #ff5670;
  color: #fff;
}

.sell-btn:hover {
  background: linear-gradient(135deg, #ff5670 0%, #e94560 100%);
  transform: translateY(-2px);
}

.build-section {
  flex: 1;
  overflow-y: auto;
  padding: 15px 20px;
}

.build-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  font-size: 16px;
  font-weight: bold;
  color: #fff;
}

.build-icon {
  font-size: 20px;
}

.tower-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.tower-btn {
  background: linear-gradient(135deg, #2a2f4a 0%, #1f2438 100%);
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  padding: 12px;
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}

.tower-btn:hover {
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.tower-btn.selected {
  border-color: #4a9eff;
  background: linear-gradient(135deg, #3a4a6a 0%, #2a3448 100%);
  box-shadow: 0 0 20px rgba(74, 158, 255, 0.5);
}

.tower-btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.tower-btn.locked {
  opacity: 0.7;
  cursor: default;
}

.tower-icon {
  width: 50px;
  height: 50px;
  margin: 0 auto 8px;
  display: block;
}

.tower-name {
  font-size: 13px;
  font-weight: bold;
  margin-bottom: 5px;
  color: #fff;
}

.tower-cost {
  font-size: 12px;
  color: #ffd700;
  margin-bottom: 5px;
}

.tower-info {
  font-size: 10px;
  color: #999;
  line-height: 1.4;
}

.unlock-btn {
  background: linear-gradient(135deg, #ffd700 0%, #ffb700 100%);
  border: 2px solid #ffe44d;
  border-radius: 6px;
  padding: 8px;
  color: #0a0e27;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s;
}

.unlock-btn:hover {
  background: linear-gradient(135deg, #ffe44d 0%, #ffd700 100%);
  transform: translateY(-2px);
}

.unlock-btn.can-afford {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
  }
  50% {
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.8);
  }
}

#sidebar::-webkit-scrollbar {
  width: 8px;
}

#sidebar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
}

#sidebar::-webkit-scrollbar-thumb {
  background: rgba(233, 69, 96, 0.5);
  border-radius: 4px;
}

#sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(233, 69, 96, 0.7);
}