:root {
  /* High-Converting HVAC Color Palette: Deep Navy + Cooling Blue + Fiery HVAC Orange/Red + Trust Gold */
  --navy-950: #061326;
  --navy-900: #0a1e3c;
  --navy-800: #102a52;
  --cool-blue: #0066ff;
  --cool-blue-light: #e6f0ff;
  --cool-cyan: #00b4d8;
  --heat-orange: #ff4d00;
  --heat-orange-hover: #e04300;
  --heat-red: #dc2626;
  --heat-soft: #fff1eb;
  --cta-green: #16a34a;
  --trust-gold: #f59e0b;
  --bg-body: #f4f7fb;
  --bg-card: #ffffff;
  --text-dark: #0f172a;
  --text-body: #334155;
  --text-muted: #64748b;
  --border-light: #dce4f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 12px 30px -8px rgba(6, 19, 38, 0.1);
  --shadow-cta: 0 12px 28px -4px rgba(255, 77, 0, 0.48);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-dark);
  line-height: 1.6;
  text-wrap: pretty;
  padding-bottom: 84px;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

h1, h2, h3, h4 {
  line-height: 1.18;
  text-wrap: balance;
  font-weight: 800;
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: var(--cool-blue);
  transition: all 0.2s ease;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Emergency Top Strip */
.top-bar {
  background: linear-gradient(90deg, #b91c1c 0%, #ea580c 50%, #b91c1c 100%);
  color: #ffffff;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.55rem 0;
  text-align: center;
  letter-spacing: 0.02em;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: #4ade80;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.35);
  animation: pulseGlow 1.6s infinite;
}

@keyframes pulseGlow {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* Sticky Header */
.site-header {
  background-color: var(--navy-950);
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #ffffff;
}

.brand-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.35));
}

.brand-text {
  font-size: 1.3rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
}

.brand-text span {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  color: #38bdf8;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-hours {
  display: none;
  text-align: right;
  color: #cbd5e1;
  font-size: 0.8rem;
  line-height: 1.25;
}

.header-hours strong {
  color: #4ade80;
  display: block;
  font-size: 0.85rem;
}

@media (min-width: 768px) {
  .header-hours {
    display: block;
  }
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: linear-gradient(180deg, #ff5e1a 0%, #e04300 100%);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.05rem;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(255, 77, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-cta:hover {
  transform: translateY(-2px);
  background: linear-gradient(180deg, #ff6a2b 0%, #cc3d00 100%);
  color: #ffffff;
}

/* HERO SECTION - High Contrast Converting Design */
.hero {
  background:
    radial-gradient(circle at 85% 20%, rgba(255, 77, 0, 0.22) 0%, transparent 45%),
    radial-gradient(circle at 15% 80%, rgba(0, 180, 216, 0.2) 0%, transparent 50%),
    linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 60%, var(--navy-800) 100%);
  color: #ffffff;
  padding: 3.25rem 0 4rem;
  border-bottom: 4px solid var(--heat-orange);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 920px) {
  .hero {
    padding: 4.5rem 0 5rem;
  }
  .hero-grid {
    grid-template-columns: 1.25fr 0.95fr;
  }
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.badge-hvac {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #f8fafc;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-hvac.gold {
  background: rgba(245, 158, 11, 0.18);
  border-color: rgba(245, 158, 11, 0.45);
  color: #fcd34d;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2.1rem, 4.6vw, 3.35rem);
  margin-bottom: 1.1rem;
  line-height: 1.12;
}

.hero h1 .cool-text {
  color: #38bdf8;
}

.hero h1 .heat-text {
  color: #ff6b2b;
}

.hero-sub {
  font-size: clamp(1.05rem, 1.9vw, 1.2rem);
  color: #cbd5e1;
  margin-bottom: 1.75rem;
  max-width: 62ch;
}

.hvac-acronym-pills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.acronym-pill {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-left: 4px solid var(--cool-cyan);
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
}

.acronym-pill.heat {
  border-left-color: var(--heat-orange);
}

.acronym-pill.vent {
  border-left-color: #4ade80;
}

.acronym-pill strong {
  display: block;
  color: #ffffff;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.acronym-pill span {
  font-size: 0.8rem;
  color: #94a3b8;
  display: block;
  line-height: 1.35;
}

.hero-trust-points {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.65rem 1rem;
}

.hero-trust-points li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: #f1f5f9;
}

.check-badge {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #22c55e;
  color: #052e16;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.8rem;
  flex-shrink: 0;
}

/* Conversion Call Card */
.call-card {
  background: #ffffff;
  color: var(--text-dark);
  border-radius: var(--radius-lg);
  padding: 2.1rem 1.65rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.55);
  border: 3px solid var(--heat-orange);
  text-align: center;
  position: relative;
}

.call-card-ribbon {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: #ecfdf5;
  color: #15803d;
  border: 1px solid #86efac;
  font-weight: 800;
  font-size: 0.82rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.call-card h2 {
  font-size: 1.55rem;
  color: var(--navy-950);
  margin-bottom: 0.45rem;
}

.call-card p {
  color: var(--text-body);
  font-size: 0.95rem;
  margin-bottom: 1.35rem;
}

.btn-call-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: linear-gradient(180deg, #ff5e1a 0%, #e04300 100%);
  color: #ffffff;
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-cta);
  margin-bottom: 1rem;
  border: 2px solid #ff8552;
}

.btn-call-main:hover {
  background: linear-gradient(180deg, #ff6c2e 0%, #c83b00 100%);
  color: #ffffff;
  transform: translateY(-3px);
}

.btn-call-label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 800;
  color: #ffedd5;
  margin-bottom: 0.15rem;
}

.btn-call-number {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: clamp(1.45rem, 3.2vw, 1.85rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.call-card-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  margin-top: 0.75rem;
}

.meta-item {
  font-size: 0.78rem;
  color: var(--text-body);
  font-weight: 700;
}

.meta-item strong {
  display: block;
  color: var(--navy-900);
  font-size: 0.92rem;
}

/* Brand Strip */
.brands-strip {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-light);
  padding: 1.25rem 0;
}

.brands-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem 2.25rem;
  text-align: center;
}

.brands-label {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.brand-names {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.75rem;
  font-weight: 800;
  font-size: 1rem;
  color: #475569;
  letter-spacing: 0.03em;
}

/* Section Layout */
.section {
  padding: 4rem 0;
}

.section-white {
  background-color: #ffffff;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.75rem;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--heat-orange);
  background-color: var(--heat-soft);
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.45rem);
  color: var(--navy-950);
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--text-body);
  font-size: 1.06rem;
}

/* Full HVAC Definition Breakdown (3 Pillars: Heating, Ventilation, Air Conditioning) */
.hvac-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.5rem;
}

.pillar-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pillar-top {
  padding: 1.5rem 1.5rem 1.15rem;
  color: #ffffff;
}

.pillar-top.heating {
  background: linear-gradient(135deg, #c2410c 0%, #ea580c 100%);
}

.pillar-top.ventilation {
  background: linear-gradient(135deg, #0f766e 0%, #0d9488 100%);
}

.pillar-top.cooling {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
}

.pillar-letter {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  font-weight: 900;
  font-size: 0.8rem;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}

.pillar-top h3 {
  color: #ffffff;
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.pillar-top p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

.pillar-body {
  padding: 1.5rem;
  flex-grow: 1;
}

.pillar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.pillar-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.94rem;
  color: var(--text-body);
  font-weight: 500;
}

.pillar-list li strong {
  color: var(--text-dark);
}

.bullet-dot {
  color: var(--heat-orange);
  font-weight: 900;
  line-height: 1.4;
}

.pillar-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  background-color: var(--navy-900);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
}

.pillar-cta:hover {
  background-color: var(--heat-orange);
  color: #ffffff;
}

/* Emergency Warning Symptoms Grid */
.symptoms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.15rem;
}

.symptom-box {
  background-color: var(--bg-body);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--heat-red);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}

.symptom-box h3 {
  font-size: 1.05rem;
  color: var(--navy-950);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.symptom-box p {
  font-size: 0.9rem;
  color: var(--text-body);
}

/* 3 Steps Section */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 1.5rem;
}

.step-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--heat-orange) 0%, #c2410c 100%);
  color: #ffffff;
  font-weight: 900;
  font-size: 1.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  box-shadow: 0 6px 15px rgba(234, 88, 12, 0.35);
}

.step-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--text-body);
}

/* FAQ Section */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-body);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
}

.faq-item h3 {
  font-size: 1.08rem;
  color: var(--navy-950);
  margin-bottom: 0.4rem;
}

.faq-item p {
  font-size: 0.94rem;
  color: var(--text-body);
}

/* High-Converting Bottom Banner */
.cta-banner {
  background:
    radial-gradient(circle at center, rgba(255, 77, 0, 0.25) 0%, transparent 65%),
    linear-gradient(135deg, var(--navy-950) 0%, var(--navy-900) 100%);
  color: #ffffff;
  padding: 4rem 0;
  text-align: center;
  border-top: 4px solid var(--heat-orange);
}

.cta-banner h2 {
  color: #ffffff;
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  margin-bottom: 0.75rem;
}

.cta-banner p {
  color: #cbd5e1;
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 1.85rem;
}

.btn-call-banner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: linear-gradient(180deg, #ff5e1a 0%, #e04300 100%);
  color: #ffffff;
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  font-weight: 900;
  padding: 1.15rem 2.5rem;
  border-radius: 999px;
  box-shadow: var(--shadow-cta);
  border: 2px solid #ff8552;
}

.btn-call-banner:hover {
  transform: translateY(-2px);
  color: #ffffff;
  background: linear-gradient(180deg, #ff6c2e 0%, #c83b00 100%);
}

/* Footer */
.site-footer {
  background-color: #040b16;
  color: #94a3b8;
  padding: 2.75rem 0;
  font-size: 0.88rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #1e293b;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    text-align: left;
  }
}

.footer-brand {
  color: #ffffff;
  font-weight: 800;
  font-size: 1.05rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  list-style: none;
}

.footer-links a {
  color: #cbd5e1;
  font-weight: 600;
}

.footer-links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 1.25rem;
  text-align: center;
  color: #64748b;
  font-size: 0.82rem;
}

/* Sticky Mobile Call Bar */
.mobile-sticky-call {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--navy-950);
  border-top: 2px solid var(--heat-orange);
  padding: 0.6rem 0.9rem;
  box-shadow: 0 -8px 25px rgba(0, 0, 0, 0.35);
  z-index: 999;
}

.mobile-sticky-call a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: 100%;
  background: linear-gradient(180deg, #ff5e1a 0%, #e04300 100%);
  color: #ffffff;
  font-weight: 900;
  font-size: 1.18rem;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(255, 77, 0, 0.45);
}

@media (min-width: 768px) {
  .mobile-sticky-call {
    display: none;
  }
}

/* Legal Pages */
.legal-page {
  padding: 3rem 0 4rem;
}

.legal-card {
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  max-width: 840px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}

@media (min-width: 768px) {
  .legal-card {
    padding: 3rem;
  }
}

.legal-card h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  margin-bottom: 0.5rem;
  color: var(--navy-950);
}

.legal-updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.legal-card h2 {
  font-size: 1.25rem;
  margin: 1.75rem 0 0.65rem;
  color: var(--navy-900);
}

.legal-card p,
.legal-card li {
  color: var(--text-body);
  font-size: 0.97rem;
  margin-bottom: 0.85rem;
}

.legal-card ul {
  padding-left: 1.35rem;
  margin-bottom: 1rem;
}

.back-home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
}