/* Reuse thermal styles; add specific visualization helpers */

/* Dark Mode Button */
#heatflowDarkModeBtn {
  display: block;
  margin: 0 auto 20px auto;
  background: linear-gradient(90deg, #00c6ff, #0072ff);
  color: #fff;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
}

#heatflowDarkModeBtn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 114, 255, 0.3);
}

.dark-mode #heatflowDarkModeBtn {
  background: linear-gradient(90deg, #00c6ff, #0072ff);
}

.hf-gradient {
  background: linear-gradient(90deg, #ff4d4d, #1e90ff);
}
.hf-arrow {
  width: 24px;
  height: 8px;
  background: #ffa500;
  clip-path: polygon(0 0, 80% 0, 80% 25%, 100% 50%, 80% 75%, 80% 100%, 0 100%);
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.2));
}
.dark-mode .hf-arrow { background: #ffd166; }