/* ============================================
   HERO BACKGROUND
   ============================================ */
.hero-water-pressure {
  background:
    linear-gradient(135deg, rgba(9, 31, 44, 0.90) 0%, rgba(12, 53, 71, 0.86) 50%, rgba(19, 75, 99, 0.80) 100%),
    url('https://images.unsplash.com/photo-1621905251189-08b45d6a269e?w=1600&auto=format&fit=crop') center/cover no-repeat;
}

/* ============================================
   UNIQUE SECTION: PSI ZONE GAUGE CARDS
   Fully responsive — stacks on mobile,
   2-col on tablet, 5-col on desktop
   ============================================ */
.psi-zones-section {
  background: linear-gradient(180deg, #ffffff 0%, #f3f8fb 100%);
}

.psi-zones-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.psi-zone {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(12, 53, 71, 0.08);
  border: 2px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
}

.psi-zone:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(12, 53, 71, 0.15);
}

.psi-zone-header {
  padding: 1.5rem 1rem 1.25rem;
  text-align: center;
  color: #fff;
  position: relative;
}

.psi-zone-reading {
  font-family: 'Poppins', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.psi-zone-unit {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-top: 0.3rem;
  opacity: 0.9;
}

.psi-zone-body {
  padding: 1.25rem 1.1rem 1.4rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.psi-zone-status {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.psi-zone-status i {
  font-size: 0.9rem;
}

.psi-zone-body h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: #0C3547;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.psi-zone-body p {
  font-size: 0.9rem;
  color: #4a5a65;
  line-height: 1.5;
  margin: 0 0 1rem;
  flex: 1;
}

.psi-zone-action {
  font-size: 0.82rem;
  color: #0C3547;
  padding-top: 0.85rem;
  border-top: 1px solid #e5edf1;
  line-height: 1.4;
}

.psi-zone-action strong {
  color: #0C3547;
  font-weight: 700;
}

/* Zone color variants */
.psi-zone-danger-low {
  border-color: #E67E22;
}
.psi-zone-danger-low .psi-zone-header {
  background: linear-gradient(135deg, #E67E22 0%, #D35400 100%);
}
.psi-zone-danger-low .psi-zone-status {
  color: #D35400;
}

.psi-zone-ideal {
  border-color: #27AE60;
  transform: translateY(-8px);
  box-shadow: 0 10px 30px rgba(39, 174, 96, 0.18);
}
.psi-zone-ideal .psi-zone-header {
  background: linear-gradient(135deg, #27AE60 0%, #1E8449 100%);
}
.psi-zone-ideal .psi-zone-status {
  color: #1E8449;
}

.psi-zone-safe {
  border-color: #1A8FBC;
}
.psi-zone-safe .psi-zone-header {
  background: linear-gradient(135deg, #1A8FBC 0%, #0C3547 100%);
}
.psi-zone-safe .psi-zone-status {
  color: #1A8FBC;
}

.psi-zone-warning {
  border-color: #F39C12;
}
.psi-zone-warning .psi-zone-header {
  background: linear-gradient(135deg, #F39C12 0%, #D68910 100%);
}
.psi-zone-warning .psi-zone-status {
  color: #D68910;
}

.psi-zone-danger-high {
  border-color: #D63031;
}
.psi-zone-danger-high .psi-zone-header {
  background: linear-gradient(135deg, #D63031 0%, #A93226 100%);
}
.psi-zone-danger-high .psi-zone-status {
  color: #A93226;
}

.psi-zones-note {
  text-align: center;
  margin-top: 2.5rem;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.25rem 1.5rem;
  background: #fff6e5;
  border-left: 4px solid #F39C12;
  border-radius: 6px;
  color: #0C3547;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1100px) {
  .psi-zones-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .psi-zone-ideal {
    transform: none;
  }
}

@media (max-width: 768px) {
  .psi-zones-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  .psi-zone-reading {
    font-size: 1.75rem;
  }
  .psi-zone-body h3 {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .psi-zones-grid {
    grid-template-columns: 1fr;
  }
  .psi-zone-reading {
    font-size: 2rem;
  }
  .psi-zone-body {
    padding: 1.25rem;
  }
  .psi-zones-note {
    padding: 1rem 1.1rem;
    font-size: 0.9rem;
  }
}