#hvac-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 9998;
  display: none;
}

#hvac-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  width: 92%;
  max-width: 440px;
  padding: 28px;
  border-radius: 16px;
  text-align: center;
  font-family: system-ui, Arial;
  z-index: 9999;
  display: none;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}

#hvac-popup h2 {
  font-size: 24px;
  color: #0b2a44;
  margin-bottom: 8px;
}

.headline {
  font-size: 15px;
  color: #333;
  margin-bottom: 18px;
}

.hvac-call-btn {
  display: block;
  background: linear-gradient(135deg,#ff7a00,#ff5500);
  color: #fff;
  font-size: 20px;
  padding: 16px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  margin-bottom: 14px;
}

.hvac-proof {
  font-size: 14px;
  color: #555;
  margin-bottom: 8px;
}

.hvac-urgency {
  font-size: 13px;
  color: #c62828;
  font-weight: 600;
}

#hvac-close {
  position: absolute;
  top: 10px;
  right: 14px;
  border: none;
  background: none;
  font-size: 20px;
  cursor: pointer;
}

/* MOBILE OPTIMIZATION */
@media (max-width: 480px) {
  #hvac-popup h2 { font-size: 22px; }
  .hvac-call-btn { font-size: 18px; padding: 15px; }
}