:root {
  --fire-red: #e11d2e;
  --charcoal: #111827;
  --charcoal-soft: #1f2937;
  --white: #ffffff;
}

/* =====================================
   DARK HVAC CARD (OPTIONAL / OLD STYLE)
===================================== */
.hvac-card {
  background: linear-gradient(180deg, #244a73, #1c3d5f);
  padding: 36px 30px;
  border-radius: 14px;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0,0,0,0.35);
  transform: translateY(60px);
  opacity: 0;
  transition: all 0.4s ease;
}

.hvac-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 45px 90px rgba(0,0,0,0.45);
}

.hvac-card .icon {
  color: #ff4d4d;
  font-size: 34px;
  margin-bottom: 20px;
  transition: transform 0.4s ease;
}

.hvac-card:hover .icon {
  transform: rotate(-6deg) scale(1.1);
}

.hvac-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.hvac-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 16px;
}

.hvac-card .counter {
  font-size: 36px;
  font-weight: 700;
  show color: #ffffff;
}

.hvac-card small {
  display: block;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

/* =====================================
   FEATURE CARD (REFERENCE IMAGE STYLE)
===================================== */
.hvac-feature-card {
  background: var(--white);
  border-radius: 14px;
  padding: 34px 28px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.25);
  text-align: left;
  position: relative;
  opacity: 0;
  transform: translateY(60px);
  transition: all 0.35s ease;
}

.hvac-feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 45px 90px rgba(0,0,0,0.35);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--fire-red), #ff6b6b);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  transition: transform 0.4s ease;
}

.hvac-feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(-6deg);
}

.hvac-feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 6px;
}

.hvac-feature-card p {
  font-size: 14px;
  color: #6b7280;
  margin-bottom: 16px;
}

.hvac-feature-card .counter {
  font-size: 34px;
  font-weight: 700;
  color: var(--charcoal);
}

.hvac-feature-card small {
  font-size: 12px;
  color: #9ca3af;
}