* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}
body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #10131a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
  color: #e0e6ed;
}
#gameCanvas {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: crosshair;
}
#ui {
  position: absolute;
  top: 16px;
  left: 16px;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 310px;
}
.panel {
  background: rgba(22, 27, 34, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 12px 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  pointer-events: auto;
}
.title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #8b949e;
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
#levelBadge {
  color: #58a6ff;
  font-weight: 700;
}
.goal-box {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}
.goal-preview {
  width: 46px;
  height: 46px;
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.goal-info { flex: 1; }
.goal-name {
  font-size: 14px;
  font-weight: 700;
  color: #f0f6fc;
  margin-bottom: 4px;
}
.progress-bar {
  width: 100%;
  height: 8px;
  background: #21262d;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 4px;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: #238636;
  transition: width 0.2s ease;
}
.progress-text {
  font-size: 12px;
  color: #8b949e;
  font-weight: 600;
}
.science-score {
  font-size: 20px;
  font-weight: 700;
  color: #a371f7;
  margin-bottom: 8px;
}
.upgrade-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.upgrade-btn {
  background: #21262d;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 6px 10px;
  color: #c9d1d9;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.15s ease;
}
.upgrade-btn:hover:not(:disabled) {
  background: #30363d;
  border-color: #58a6ff;
  color: #fff;
}
.upgrade-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.danger-btn {
  background: transparent;
  border: none;
  color: #f85149;
  font-size: 10px;
  cursor: pointer;
  text-decoration: underline;
}
.danger-btn:hover { color: #ff7b72; }
#toolbar {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  background: rgba(22, 27, 34, 0.94);
  padding: 8px;
  border-radius: 12px;
  border: 1px solid #30363d;
  box-shadow: 0 12px 32px rgba(0,0,0,0.6);
}
.tool-btn {
  background: #21262d;
  color: #c9d1d9;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  min-width: 66px;
  transition: all 0.15s ease;
}
.tool-btn:hover:not(:disabled) { background: #30363d; color: #f0f6fc; }
.tool-btn.active { background: #1f6feb; border-color: #58a6ff; color: #fff; }
.tool-btn:disabled { opacity: 0.35; cursor: not-allowed; filter: grayscale(1); }
.shortcut { font-size: 9px; color: #8b949e; }
.tool-btn.active .shortcut { color: #c9d1d9; }
#hints {
  position: absolute;
  bottom: 24px;
  right: 24px;
  font-size: 12px;
  color: #8b949e;
  text-align: right;
  line-height: 1.6;
}
kbd {
  background: #21262d;
  border: 1px solid #484f58;
  border-radius: 4px;
  padding: 2px 6px;
  font-family: inherit;
  color: #f0f6fc;
}