/* Fixar Lime — Main Stylesheet
   Inherited from fixar-html with limestone palette (see variables.css).
   Mobile-first approach: base = mobile, min-width queries for larger screens.
   HVAC-specific components (BTU widget, Thumbtack, brand grid) will be
   trimmed in a later pass; harmless to ship as dead CSS for Phase 0.
   ========================================================================= */

/* Skip Navigation Link (Accessibility) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 10000;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}

/* Lucide Card Icons */
.card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  stroke-width: 1.5;
}
.stat-item [data-lucide] {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

/* ============================================
   1. RESET & BASE
   ============================================ */

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: #F5F5F5 url('../images/bg-pattern.png') center top/cover no-repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

/* ============================================
   2. TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  line-height: var(--leading-tight);
  font-weight: var(--font-bold);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

.text-lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-dark);
}

small, .text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }

/* Content typography (for sections with real copy) */
.content-block p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

.content-block ul,
.content-block ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.content-block ul {
  list-style: disc;
}

.content-block ol {
  list-style: decimal;
}

.content-block li {
  margin-bottom: var(--space-2);
  line-height: var(--leading-normal);
}

.content-block strong {
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
}

/* ============================================
   3. CONTAINER
   ============================================ */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

/* ============================================
   4. BUTTONS
   ============================================ */

.btn,
.btn-primary,
.btn-secondary,
.btn-urgent,
.btn-heating,
.btn-outline {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  font-family: inherit;
  text-align: center;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary-text);
  border-color: var(--color-primary-text);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
}

.btn-urgent {
  background-color: var(--color-emergency);
  color: var(--color-text-on-dark);
}

.btn-urgent:hover {
  background-color: var(--color-btn-urgent-hover);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-heating {
  background-color: var(--color-heating);
  color: var(--color-text-on-dark);
}

.btn-heating:hover {
  background-color: var(--color-btn-heating-hover);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary-text);
  color: var(--color-primary-text);
}

/* Button Sizes */
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* Book Now (nav CTA) */
.btn-book {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  display: inline-block;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-book:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   5. CARDS
   ============================================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-tint);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
  color: var(--color-primary);
}

.card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.card-link {
  display: inline-block;
  margin-top: var(--space-4);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--color-primary-text);
}

.card-link:hover {
  color: var(--color-primary-text);
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.card-grid + h3 {
  margin-top: var(--space-6);
}

/* Feature Card (horizontal icon + text) */
.feature-card {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.feature-card .card-icon {
  flex-shrink: 0;
  margin-bottom: 0;
}

/* Pricing Card */
.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-8);
  text-align: center;
  border: 2px solid var(--color-border);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.pricing-card ul {
  flex: 1;
}

.pricing-card .btn-outline,
.pricing-card .btn-primary {
  margin-top: auto;
}

.pricing-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--color-primary);
}

.pricing-card .price {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin: var(--space-4) 0;
}

.pricing-card .price span {
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  color: var(--color-text-light);
}

/* Blog Card */
.blog-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.blog-card-image {
  width: 100%;
  height: 200px;
  background: var(--color-bg-alt);
  object-fit: cover;
}

.blog-card-body {
  padding: var(--space-6);
}

.blog-card-meta {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.blog-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

/* Service Card */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border);
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.service-card .card-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-3);
}

.service-card h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-3);
}

/* Trust Card */
.trust-card {
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary);
}

.trust-card h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.trust-card p {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
}

/* Area Card */
.area-card {
  padding: var(--space-5);
  background: var(--color-white);
  border: 1px solid #e0e0e0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.area-card h3 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-2);
}

.area-card p {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
}

/* Process Step */
.process-step {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
}

.process-step > div:not(.step-number) {
  flex: 1;
}

.process-step:last-child {
  border-bottom: 1px solid var(--color-border);
}

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
}

.process-step h3 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-1);
}

.process-step p {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
}

/* Outline Button */
.btn-outline {
  display: inline-block;
  padding: var(--space-3) var(--space-5);
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

/* ============================================
   6. FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  min-height: 48px;
  font-family: inherit;
  font-size: 16px; /* prevents iOS zoom on focus */
  color: #212121 !important;
  -webkit-text-fill-color: #212121 !important;
  background-color: #FFFFFF !important;
  color-scheme: light;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.15);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #555555 !important;
  -webkit-text-fill-color: #555555 !important;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23424242' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-emergency);
  margin-top: var(--space-1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-emergency);
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
}

.sms-consent-group {
  margin-top: var(--space-4);
}

.sms-consent-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.sms-consent-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.sms-consent-label a {
  color: var(--color-primary);
  text-decoration: underline;
}

.sms-consent-label a:hover {
  color: var(--color-primary-dark);
}

/* ============================================
   7. TABLES
   ============================================ */

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

th, td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  background: var(--color-bg-alt);
}

/* ============================================
   8. UTILITY BAR
   ============================================ */

.utility-bar {
  background-color: var(--color-charcoal);
  color: var(--color-text-on-dark);
  font-size: var(--text-xs);
  padding: var(--space-1) 0;
}

.utility-bar .container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  text-align: center;
}

/* Hide service area text on very small screens, show only phone */
.utility-bar .container > span:first-child {
  display: none;
}

.utility-bar a {
  color: var(--color-text-on-dark);
}

.utility-bar a:hover {
  color: var(--color-primary-light);
}

/* ============================================
   9. HEADER / NAVIGATION
   ============================================ */

.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: var(--space-2) var(--space-4);
  max-width: 1280px;
  margin: 0 auto;
}

.site-logo {
  margin-right: auto;
}

.site-logo img {
  height: 48px;
  width: auto;
}

/* Desktop Nav (hidden on mobile, shown at LG) */
.main-nav {
  display: none;
  align-items: center;
  gap: var(--space-3);
}

.main-nav > a:not(.btn-book),
.main-nav .nav-dropdown-trigger {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.main-nav > a:not(.btn-book):hover,
.main-nav .nav-dropdown-trigger:hover {
  color: var(--color-primary);
}

/* Hover underline indicator */
.main-nav > a:not(.btn-book)::after,
.main-nav .nav-dropdown-trigger::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.main-nav > a:not(.btn-book):hover::after,
.main-nav .nav-dropdown-trigger:hover::after {
  transform: scaleX(1);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 220px;
  z-index: 1001;
  padding: var(--space-5);
  padding-top: calc(var(--space-5) + var(--space-2));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.nav-dropdown.active .nav-dropdown-menu {
  display: block;
  opacity: 1;
}

.nav-dropdown-menu ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-dropdown-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--color-text);
  font-size: var(--text-base);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-dropdown-menu a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Services 4-column dropdown */
.services-dropdown-menu {
  min-width: 700px;
  display: none;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: var(--space-6);
  left: 0;
  transform: none;
}

.nav-dropdown.active .services-dropdown-menu {
  display: grid;
  opacity: 1;
}

/* Commercial 2-column dropdown */
.commercial-dropdown-menu {
  min-width: 420px;
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  left: 0;
  transform: none;
}

.nav-dropdown.active .commercial-dropdown-menu {
  display: grid;
  opacity: 1;
}

.dropdown-column .nav-category {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
  padding-left: var(--space-3);
  color: var(--color-primary-dark);
}

.dropdown-column ul {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.dropdown-column a {
  font-size: var(--text-base);
  color: var(--color-text);
  padding: var(--space-2) var(--space-3);
  display: block;
  border-radius: var(--radius-sm);
}

.dropdown-column a:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.dropdown-view-all {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  font-size: var(--text-sm);
  display: block;
}

.dropdown-view-all:hover {
  color: var(--color-primary-dark);
}

/* ============================================
   10. MOBILE CONTROLS
   ============================================ */

.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  font-size: 1.25rem;
  width: 36px;
  height: 36px;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

/* Desktop Social Icons (between logo and nav) */
.desktop-social {
  display: none;
}

.mobile-phone-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1rem;
  width: 28px;
  height: 28px;
}

/* ============================================
   11. MOBILE NAV OVERLAY
   ============================================ */

.mobile-nav-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 70%;
  max-width: 320px;
  background: var(--color-white);
  z-index: 2000;
  overflow-y: auto;
  padding: var(--space-4);
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s ease-out;
  visibility: hidden;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
}

.mobile-nav-overlay.active {
  transform: translateX(0);
  visibility: visible;
}



.mobile-nav-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease-out;
}

.mobile-nav-scrim.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  flex-shrink: 0;
}

.mobile-nav-close {
  background: none;
  border: none;
  font-size: 2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  line-height: 1;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  flex-grow: 1;
}

.mobile-nav-links > a,
.mobile-accordion-trigger {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  transition: color var(--transition-fast);
}

.mobile-nav-links > a:hover,
.mobile-accordion-trigger:hover {
  color: var(--color-primary);
}

.mobile-accordion.active .mobile-accordion-trigger {
  color: var(--color-primary);
}

.mobile-accordion-content {
  max-height: 0;
  overflow: hidden;
  padding: 0 0 0 var(--space-4);
  transition: max-height 0.35s ease-out, padding 0.35s ease-out;
}

.mobile-accordion.active .mobile-accordion-content {
  max-height: 1200px;
  padding: var(--space-2) 0 var(--space-4) var(--space-4);
}

.mobile-accordion-content .nav-category {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: var(--space-4) 0 var(--space-2);
  color: var(--color-text-light);
  font-weight: var(--font-semibold);
}

.mobile-pill-group {
  display: flex;
  gap: 6px;
  margin-bottom: var(--space-3);
  flex-wrap: nowrap;
}

.mobile-pill {
  display: inline-block;
  padding: 2px 8px !important;
  line-height: 1.4;
  background: transparent;
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.mobile-pill:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

.mobile-accordion-content .nav-category {
  color: var(--color-primary);
}

.mobile-accordion-content a {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-text);
  font-size: var(--text-base);
  transition: color var(--transition-fast);
}

.mobile-accordion-content a:hover {
  color: var(--color-primary);
}

.mobile-accordion-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-3) 0;
}

.mobile-nav-cta {
  margin-top: auto;
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  flex-shrink: 0;
}

.mobile-nav-cta .btn-book {
  width: 100%;
  text-align: center;
  padding: var(--space-4);
  font-size: var(--text-lg);
  border-radius: var(--radius-md);
}

.mobile-nav-cta .mobile-nav-phone {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
}

.mobile-nav-cta a:last-child {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

/* ============================================
   12. BREADCRUMBS
   ============================================ */

.breadcrumbs {
  padding: var(--space-3) 0;
  font-size: var(--text-xs);
  color: var(--color-text-light);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.breadcrumbs a {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

.breadcrumbs .separator {
  margin: 0 var(--space-2);
  opacity: 0.5;
}

/* ============================================
   13. HERO SECTION
   ============================================ */

.hero {
  padding: var(--space-12) 0;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: var(--color-text-on-dark);
  position: relative;
  overflow: hidden;
}

.hero .container {
  position: relative;
  z-index: 1;
}

/* Emblem watermark — hidden on small mobile, shown from 480px+ */
.hero-emblem {
  display: none;
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  width: 180px;
  height: 180px;
  opacity: 0.08;
  pointer-events: none;
  user-select: none;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-on-dark);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-6);
  max-width: 640px;
  line-height: var(--leading-relaxed);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hero-cta .btn-primary,
.hero-cta .btn-secondary,
.hero-cta .btn-urgent {
  text-align: center;
  width: 100%;
}

.hero .btn-primary {
  background-color: var(--color-text-on-dark);
  color: var(--color-primary-dark);
}

.hero .btn-primary:hover {
  background-color: var(--color-off-white);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
}

.hero .btn-secondary {
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
}

.hero .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-text-on-dark);
  color: var(--color-text-on-dark);
}

.hero .btn-urgent {
  background-color: var(--color-emergency);
  color: var(--color-text-on-dark);
}

.hero .btn-urgent:hover {
  background-color: var(--color-btn-urgent-hover);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   14. SECTIONS
   ============================================ */

.section {
  padding: var(--space-12) 0;
  background-color: transparent;
}

.section-alt {
  background-color: transparent;
}

.section h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-4);
}

.section h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-3);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-10);
}

.section-header p {
  color: var(--color-text);
  font-size: var(--text-lg);
  margin-top: var(--space-3);
}

/* ============================================
   15. CTA BLOCK
   ============================================ */

.cta-block {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-on-dark);
  padding: var(--space-12) 0;
  text-align: center;
}

.cta-block h2 {
  color: var(--color-text-on-dark);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.cta-block p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-lg);
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-block .btn-primary {
  background-color: var(--color-text-on-dark);
  color: var(--color-primary-dark);
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
}

.cta-block .btn-primary:hover {
  background-color: var(--color-off-white);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
}

.cta-block .btn-urgent {
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
}

.cta-block .btn-secondary {
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
}

.cta-block .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-text-on-dark);
  border-color: var(--color-text-on-dark);
}

.cta-block p a {
  color: #ffffff !important;
  text-decoration: underline !important;
}

.cta-block p a:hover {
  color: rgba(255, 255, 255, 0.8) !important;
}

.cta-block p {
  color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   16. FAQ / ACCORDION
   ============================================ */

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) 0;
  background: none;
  border: none;
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question::after {
  content: '+';
  font-size: var(--text-xl);
  font-weight: var(--font-normal);
  color: var(--color-text-light);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.faq-item.active .faq-question::after {
  content: '\2212';
}

.faq-answer {
  display: none;
  padding-bottom: var(--space-5);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
}

.faq-item.active .faq-answer {
  display: block;
}

/* ============================================
   17. BADGES & TAGS
   ============================================ */

.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background: var(--color-primary-tint);
  color: var(--color-primary);
}

.hero .badge-primary {
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary-dark);
}

.badge-cooling {
  background: var(--color-cooling-tint);
  color: var(--color-cooling);
}

.badge-heating {
  background: var(--color-heating-tint);
  color: var(--color-heating);
}

.badge-emergency {
  background: var(--color-emergency-tint);
  color: var(--color-emergency);
}

/* ============================================
   18. FOOTER
   ============================================ */

.site-footer {
  background-color: var(--color-bg-footer);
  color: var(--color-text-on-dark);
  padding: var(--space-12) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.footer-col h4,
.footer-col .footer-heading {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-on-dark);
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-sm);
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-text-on-dark);
}

.footer-col p {
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.75);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Mobile header social icons */
.mobile-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  width: 28px;
  height: 28px;
}

.mobile-social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.footer-areas {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-10);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-sm);
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-6) var(--space-4);
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: var(--text-xs);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   19. MOBILE STICKY CTA BAR
   ============================================ */

.sticky-cta-bar {
  display: block;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1500;
  background: transparent;
  padding: 10px 12px;
  pointer-events: none;
}

.sticky-cta-bar .container {
  display: flex;
  gap: 10px;
  padding: 0;
}

.sticky-cta-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 46px;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
  border-radius: var(--radius-lg);
  pointer-events: auto;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.sticky-cta-bar .cta-call {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}

.sticky-cta-bar .cta-call:hover {
  background: var(--color-primary-dark);
}

.sticky-cta-bar .cta-book {
  background: var(--color-white);
  color: var(--color-primary-text);
  border: 1.5px solid var(--color-primary-text);
}

.sticky-cta-bar .cta-book:hover {
  background: var(--color-bg-alt);
}

/* Body padding for sticky bar on mobile */
body {
  padding-bottom: 60px;
}

/* ============================================
   20. SCROLL ANIMATIONS
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays for card grids */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ============================================
   21. STAT COUNTERS
   ============================================ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  text-align: center;
  padding: var(--space-8) 0;
}

.stat-item {
  padding: var(--space-4);
  text-align: center;
}

.stat-number {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  line-height: 1;
  display: inline;
}

.stat-number + span {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  line-height: 1;
}

.stat-item p {
  margin-top: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-medium);
}

/* Dark background variant (inside CTA/hero) */
.cta-block .stat-number,
.hero .stat-number {
  color: var(--color-text-on-dark);
}

.cta-block .stat-label,
.hero .stat-label {
  color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   22. TESTIMONIAL CAROUSEL
   ============================================ */

.testimonial-carousel {
  position: relative;
  overflow: hidden;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-track {
  display: flex;
  transition: transform 0.5s ease-out;
}

.testimonial-slide {
  flex: 0 0 100%;
  padding: var(--space-6);
  text-align: center;
}

.testimonial-stars {
  color: var(--color-star);
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  letter-spacing: 0.1em;
}

.testimonial-text {
  font-size: var(--text-lg);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  font-style: italic;
}

.testimonial-author {
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
}

.testimonial-source {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.carousel-btn {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--text-lg);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.carousel-btn:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  border-color: var(--color-primary);
}

.carousel-dots {
  display: flex;
  gap: var(--space-2);
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-gray-light);
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast);
  padding: 10px;
  background-clip: content-box;
}

.carousel-dot.active {
  background: var(--color-primary);
  background-clip: content-box;
}

/* ============================================
   23. PORTFOLIO BEFORE/AFTER SLIDER
   ============================================ */

.ba-slider {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16/10;
  user-select: none;
  touch-action: none;
}

.ba-slider img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ba-after {
  clip-path: inset(0 50% 0 0);
}

.ba-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: var(--color-white);
  cursor: ew-resize;
  z-index: 10;
  transform: translateX(-50%);
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.ba-handle::after {
  content: '\2194';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  background: var(--color-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  font-size: var(--text-lg);
  color: var(--color-text);
}

.ba-label {
  position: absolute;
  top: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: rgba(0, 0, 0, 0.6);
  color: var(--color-text-on-dark);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  z-index: 5;
}

.ba-label-before {
  left: var(--space-3);
}

.ba-label-after {
  right: var(--space-3);
}

/* ============================================
   24. BTU CALCULATOR
   ============================================ */

.calculator-form {
  display: grid;
  gap: var(--space-6);
  max-width: 700px;
}

.calculator-form .form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

/* Nav Icon (inline SVG in nav links) */
.nav-icon {
  vertical-align: -3px;
  margin-right: 2px;
}

/* Label Icons */
.label-icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  vertical-align: -2px;
  color: var(--color-primary);
  margin-right: 2px;
}

/* Advanced Toggle */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-primary-text);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  min-height: 48px;
}
.advanced-toggle:hover {
  color: var(--color-primary);
}
.advanced-toggle * {
  pointer-events: none;
}
.toggle-arrow {
  font-size: var(--text-xs);
  margin-left: auto;
}
.advanced-fields {
  display: none;
}
.advanced-fields.active {
  display: grid;
  gap: var(--space-6);
}

/* Tooltips */
.tooltip-trigger {
  position: relative;
  color: var(--color-primary-text);
  cursor: help;
  font-weight: var(--font-semibold);
  font-size: var(--text-xs);
  margin-left: 4px;
}
.tooltip-text {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  padding: var(--space-3);
  background: #1a1a1a;
  color: #f0f0f0;
  font-size: var(--text-xs);
  font-weight: var(--font-normal);
  border-radius: var(--radius-md);
  line-height: var(--leading-relaxed);
  z-index: 10;
  box-shadow: var(--shadow-md);
}
.tooltip-text::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #1a1a1a;
}
.tooltip-trigger:hover .tooltip-text,
.tooltip-trigger:focus .tooltip-text {
  display: block;
}

/* BTU Gauge */
.result-gauge {
  margin: var(--space-4) 0 var(--space-6);
  padding: 0 var(--space-2);
}
.gauge-bar {
  height: 12px;
  background: linear-gradient(to right, #4CAF50, #FFC107, #FF5722);
  border-radius: 6px;
  position: relative;
}
.gauge-marker {
  position: absolute;
  top: -6px;
  width: 24px;
  height: 24px;
  background: var(--color-text-heading);
  border: 3px solid #fff;
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: var(--shadow-sm);
  transition: left 0.5s ease;
}
.gauge-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

/* Calculator CTA Banner */
.calculator-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: rgba(46, 125, 50, 0.05);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  margin-top: var(--space-6);
}
.calculator-cta .card-icon {
  flex-shrink: 0;
}
.calculator-cta div {
  flex: 1;
}
.calculator-cta strong {
  display: block;
  color: var(--color-text-heading);
  margin-bottom: var(--space-1);
}
.calculator-cta p {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin: 0;
}
.calculator-cta .btn-primary {
  flex-shrink: 0;
  white-space: nowrap;
}
@media (max-width: 639px) {
  .calculator-cta {
    flex-direction: column;
    text-align: center;
  }
}

.calculator-results {
  display: none;
  max-width: 700px;
  padding: var(--space-8);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.calculator-results.active {
  display: block;
}

.result-primary {
  text-align: center;
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.result-btu {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  line-height: 1;
}

.result-unit {
  font-size: var(--text-lg);
  color: var(--color-text-light);
  margin-top: var(--space-2);
}

.result-details {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.result-detail-item {
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
}

.result-detail-item strong {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-1);
}

.result-detail-item span {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
}

.result-tips {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: rgba(46, 125, 50, 0.05);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
}

.result-tips h4 {
  margin-bottom: var(--space-2);
  color: var(--color-primary-dark);
}

.result-tips ul {
  list-style: disc;
  padding-left: var(--space-6);
  color: var(--color-text);
}

.result-tips li {
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
}

/* ============================================
   25. CONTACT INFO GRID
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.contact-info-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-info-card .card-icon {
  font-size: var(--text-2xl);
  flex-shrink: 0;
}

.contact-info-card h4 {
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-1);
}

.contact-info-card p,
.contact-info-card a {
  font-size: var(--text-sm);
  color: var(--color-text);
}

.map-embed {
  width: 100%;
  height: 350px;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ============================================
   26. UTILITY CLASSES
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* ============================================
   21. RESPONSIVE — MOBILE-FIRST BREAKPOINTS
   ============================================ */

/* XS: 480px — show hero emblem */
@media (min-width: 480px) {
  .hero-emblem {
    display: block;
  }
}

/* SM: 640px — larger phones */
@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }

  .hero-emblem {
    width: 240px;
    height: 240px;
    opacity: 0.1;
  }

  .utility-bar .container {
    justify-content: space-between;
    text-align: left;
  }

  .utility-bar .container > span:first-child {
    display: inline;
  }

  .utility-bar {
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
  }

  .hero-cta {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  .hero-cta .btn-primary,
  .hero-cta .btn-secondary,
  .hero-cta .btn-urgent {
    width: auto;
  }

  .site-logo img {
    height: 56px;
  }

  .breadcrumbs {
    font-size: var(--text-sm);
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: var(--text-4xl);
  }

  .section h2 {
    font-size: var(--text-3xl);
  }

  .cta-block h2 {
    font-size: var(--text-3xl);
  }

  .stats-row {
    grid-template-columns: repeat(4, 1fr);
  }

  .calculator-form .form-row {
    grid-template-columns: 1fr 1fr;
  }

  .result-details {
    grid-template-columns: 1fr 1fr;
  }
}

/* MD: 768px — tablets */
@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }

  .hero {
    padding: var(--space-16) 0;
  }

  .hero h1 {
    font-size: var(--text-5xl);
  }

  .section {
    padding: var(--space-16) 0;
  }

  .cta-block {
    padding: var(--space-16) 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    padding: 0 var(--space-8);
  }

  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  h1 { font-size: var(--text-5xl); }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

  .map-embed {
    height: 400px;
  }
}

/* LG: 1024px — laptops (desktop nav switch) */
@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }

  .mobile-nav-toggle,
  .mobile-phone-link,
  .mobile-social-link {
    display: none;
  }

  .site-logo {
    margin-right: 0;
  }

  .desktop-social {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    margin-right: auto;
  }

  .nav-container > .theme-toggle {
    margin-left: var(--space-4);
  }

  .desktop-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--color-gray-medium);
    transition: color var(--transition-fast);
  }

  .desktop-social a:hover {
    color: var(--color-primary);
  }

  .desktop-social svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
  }

  .sticky-cta-bar {
    display: none;
  }

  body {
    padding-bottom: 0;
    background-attachment: fixed;
  }

  .hero {
    padding: var(--space-20) 0;
  }

  .hero-emblem {
    width: 420px;
    height: 420px;
    right: 0;
    opacity: 0.12;
  }

  .section {
    padding: var(--space-20) 0;
  }

  .cta-block {
    padding: var(--space-20) 0;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-logo img {
    height: 64px;
  }

  .nav-container {
    padding: var(--space-1) var(--space-6);
  }
}

/* XL: 1280px — desktops */
@media (min-width: 1280px) {
  .card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero h1 {
    font-size: var(--text-5xl);
  }

  .section h2 {
    font-size: var(--text-4xl);
  }

  .main-nav {
    gap: var(--space-4);
  }

  .main-nav > a:not(.btn-book),
  .main-nav .nav-dropdown-trigger {
    font-size: var(--text-base);
  }
}

/* ============================================
   LUCIDE ICON STYLES
   ============================================ */

/* Card Icons (Lucide) */
.card-icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  stroke-width: 1.5;
}
.stat-item .card-icon,
.stat-item [data-lucide] {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.process-step [data-lucide] {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

/* =============================================
   Portfolio Gallery
   ============================================= */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}
.portfolio-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-gray-100);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
}
.portfolio-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.portfolio-item img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.portfolio-item:hover img {
  transform: scale(1.05);
}
.portfolio-caption {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
}
.portfolio-caption .badge {
  font-size: 0.7rem;
  margin-bottom: var(--space-1);
  display: inline-block;
}
.portfolio-caption p {
  font-size: 0.85rem;
  color: var(--color-gray-700);
  margin: 0;
  line-height: 1.4;
}

/* Filter Buttons */
.btn-filter {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-gray-300);
  background: var(--color-surface);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-gray-700);
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-filter:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-filter.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* Portfolio item hide/show animation */
.portfolio-item.hidden {
  display: none;
}

/* Badge variants for portfolio */
.badge-emergency {
  background: var(--color-emergency, #dc2626);
  color: #fff;
}

/* Lightbox overlay */
.portfolio-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.portfolio-lightbox.active {
  display: flex;
}
.portfolio-lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}
.portfolio-lightbox-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  padding: var(--space-2);
}
.portfolio-lightbox-caption {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  text-align: center;
  font-size: 0.95rem;
  background: rgba(0,0,0,0.6);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  max-width: 80vw;
}

@media (min-width: 768px) {
  .portfolio-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .portfolio-item img {
    height: 260px;
  }
}
@media (min-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   27. GOOGLE REVIEWS WIDGET
   ============================================ */

.gr-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.gr-overall {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.gr-rating-big {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-heading);
  line-height: 1;
}

.gr-stars {
  display: flex;
  gap: 2px;
}

.gr-star {
  color: var(--color-star);
  font-size: 1.25rem;
  line-height: 1;
}

.gr-star.empty {
  color: var(--color-gray-light);
}

.gr-count {
  font-size: var(--text-sm);
  color: var(--color-text-light);
}

.gr-carousel {
  position: relative;
  overflow: hidden;
}

.gr-track {
  display: flex;
  transition: transform 0.5s ease-out;
}

.gr-slide {
  flex: 0 0 100%;
  padding: 0 var(--space-2);
  box-sizing: border-box;
}

.gr-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-fast);
}

.gr-card:hover {
  box-shadow: var(--shadow-md);
}

.gr-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.gr-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.gr-author-info {
  flex: 1;
  min-width: 0;
}

.gr-author-name {
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  font-size: var(--text-base);
  line-height: var(--leading-tight);
}

.gr-review-date {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.gr-card-stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-3);
}

.gr-card-star {
  color: var(--color-star);
  font-size: 1rem;
}

.gr-review-text {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: var(--leading-relaxed);
  flex: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
}

.gr-review-text.expanded {
  -webkit-line-clamp: unset;
}

.gr-read-more {
  background: none;
  border: none;
  color: var(--color-link);
  font-size: var(--text-sm);
  cursor: pointer;
  padding: 0;
  margin-top: var(--space-2);
  font-weight: var(--font-medium);
}

.gr-read-more:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

.gr-google-icon {
  width: 20px;
  height: 20px;
  margin-left: auto;
  flex-shrink: 0;
}

/* Carousel controls — reuse existing pattern */
.gr-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.gr-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding: var(--space-3) var(--space-6);
  background: var(--color-white);
  color: var(--color-text-heading);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-weight: var(--font-semibold);
  font-size: var(--text-base);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.gr-cta:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.gr-cta svg {
  width: 20px;
  height: 20px;
}

/* Loading & error states */
.gr-loading {
  text-align: center;
  padding: var(--space-12) 0;
  color: var(--color-text-light);
}

.gr-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-gray-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: gr-spin 0.8s linear infinite;
  margin: 0 auto var(--space-4);
}

@keyframes gr-spin {
  to { transform: rotate(360deg); }
}

.gr-error {
  text-align: center;
  padding: var(--space-8) 0;
  color: var(--color-text-light);
}

/* Desktop: 3 cards visible */
@media (min-width: 768px) {
  .gr-slide {
    flex: 0 0 33.333%;
    padding: 0 var(--space-3);
  }
}

/* Tablet: 2 cards */
@media (min-width: 480px) and (max-width: 767px) {
  .gr-slide {
    flex: 0 0 50%;
    padding: 0 var(--space-2);
  }
}

/* ============================================
   DARK MODE OVERRIDES
   ============================================ */

/* Utility bar — keep dark background in dark mode */
[data-theme="dark"] .utility-bar {
  background-color: #111111;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .utility-bar {
    background-color: #111111;
  }
}

/* Dark mode body background pattern */
[data-theme="dark"] body { background-image: url('../images/bg-pattern-dark.png'); background-size: cover; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body { background-image: url('../images/bg-pattern-dark.png'); background-size: cover; }
}

/* Fix hardcoded white backgrounds for dark mode — semi-transparent to let bg pattern show */
[data-theme="dark"] .section {
  background-color: rgba(20, 20, 20, 0.65);
}
[data-theme="dark"] .section-alt {
  background-color: rgba(30, 30, 30, 0.68);
}
[data-theme="dark"] .hero .badge-primary {
  background: var(--color-surface);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .section {
    background-color: rgba(20, 20, 20, 0.65);
  }
  :root:not([data-theme="light"]) .section-alt {
    background-color: rgba(30, 30, 30, 0.68);
  }
  :root:not([data-theme="light"]) .hero .badge-primary {
    background: var(--color-surface);
  }
}

/* Form inputs — dark background in dark mode */
[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
  background-color: #2A2A2A !important;
  color: #E0E0E0 !important;
  -webkit-text-fill-color: #E0E0E0 !important;
  border-color: #444;
}
[data-theme="dark"] .form-input::placeholder,
[data-theme="dark"] .form-textarea::placeholder {
  color: #999 !important;
  -webkit-text-fill-color: #999 !important;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .form-input,
  :root:not([data-theme="light"]) .form-select,
  :root:not([data-theme="light"]) .form-textarea {
    background-color: #2A2A2A !important;
    color: #E0E0E0 !important;
    -webkit-text-fill-color: #E0E0E0 !important;
    border-color: #444;
  }
  :root:not([data-theme="light"]) .form-input::placeholder,
  :root:not([data-theme="light"]) .form-textarea::placeholder {
    color: #999 !important;
    -webkit-text-fill-color: #999 !important;
  }
}

/* Brand logos — light background pill in dark mode */
[data-theme="dark"] .brand-grid img {
  background: rgba(255, 255, 255, 0.9);
  padding: 6px 12px;
  border-radius: 6px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-grid img {
    background: rgba(255, 255, 255, 0.9);
    padding: 6px 12px;
    border-radius: 6px;
  }
}

/* Smooth theme transition (only after page load via JS) */
html.theme-ready,
html.theme-ready *,
html.theme-ready *::before,
html.theme-ready *::after {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ============================================
   HVAC 101 — Interactive Components
   ============================================ */

/* --- Glossary terms + tooltip --- */
.hvac101-term {
  border-bottom: 1.5px dotted var(--color-primary);
  cursor: help;
  position: relative;
  font-weight: var(--font-semibold);
}
.hvac101-term:hover,
.hvac101-term:focus-visible {
  color: var(--color-primary);
  outline: none;
}
.hvac101-tooltip {
  position: fixed;
  z-index: 9999;
  max-width: 280px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-charcoal);
  color: var(--color-text-on-dark);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 180ms ease-out, transform 180ms ease-out;
}
.hvac101-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Animated Stat Band --- */
.hvac101-stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-4);
}
.hvac101-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  position: relative;
}
.hvac101-stat::after {
  content: 'Hover to replay';
  position: absolute;
  bottom: var(--space-2);
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-light);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}
.hvac101-stat:hover,
.hvac101-stat:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(46, 125, 50, 0.18), var(--shadow-md);
  border-color: var(--color-primary);
  outline: none;
}
.hvac101-stat:hover::after,
.hvac101-stat:focus-visible::after {
  opacity: 1;
}
.hvac101-stat:hover .stat-number,
.hvac101-stat:focus-visible .stat-number {
  color: var(--color-cooling);
}
.hvac101-stat .stat-number {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.hvac101-stat-label {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--space-2);
}
.hvac101-stat-sub {
  font-size: var(--text-sm);
  color: var(--color-text-light);
  line-height: var(--leading-normal);
}
@media (max-width: 900px) {
  .hvac101-stats-band { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .hvac101-stats-band { grid-template-columns: 1fr; }
}

/* --- Interactive HVAC History Timeline --- */
.hvac101-timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.hvac101-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--color-cooling), var(--color-primary), var(--color-heating));
  transform: translateX(-50%);
  border-radius: var(--radius-full);
}
.hvac101-timeline-item {
  position: relative;
  width: 50%;
  padding: var(--space-6) var(--space-10) var(--space-6) 0;
  box-sizing: border-box;
}
.hvac101-timeline-item:nth-child(even) {
  margin-left: 50%;
  padding: var(--space-6) 0 var(--space-6) var(--space-10);
}
.hvac101-timeline-item::before {
  content: '';
  position: absolute;
  top: var(--space-10);
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  border: 3px solid var(--color-surface);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--color-primary);
  z-index: 1;
}
.hvac101-timeline-item:nth-child(odd)::before {
  right: -8px;
}
.hvac101-timeline-item:nth-child(even)::before {
  left: -8px;
}
.hvac101-timeline-item.hvac101-timeline-highlight::before {
  background: var(--color-heating);
  box-shadow: 0 0 0 2px var(--color-heating), 0 0 12px var(--color-heating);
  width: 20px;
  height: 20px;
  top: calc(var(--space-10) - 2px);
}

.hvac101-timeline-card {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.hvac101-timeline-card:hover,
.hvac101-timeline-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  outline: none;
}
.hvac101-timeline-highlight .hvac101-timeline-card {
  border-color: var(--color-heating);
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-heating-tint) 100%);
}
.hvac101-timeline-year {
  display: inline-block;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  font-variant-numeric: tabular-nums;
}
.hvac101-timeline-highlight .hvac101-timeline-year {
  color: var(--color-heating);
}
.hvac101-timeline-card h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  color: var(--color-text-heading);
}
.hvac101-timeline-card p {
  margin: 0;
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}
.hvac101-timeline-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}
.hvac101-timeline-chevron {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--transition-fast);
}
.hvac101-timeline-card[aria-expanded="true"] .hvac101-timeline-chevron {
  transform: rotate(-135deg);
}
.hvac101-timeline-extra {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 400ms ease, opacity 300ms ease, margin-top 300ms ease;
  margin-top: 0;
}
.hvac101-timeline-card[aria-expanded="true"] .hvac101-timeline-extra {
  max-height: 400px;
  opacity: 1;
  margin-top: var(--space-3);
}
.hvac101-timeline-extra p {
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}
@media (max-width: 760px) {
  .hvac101-timeline::before { left: 16px; }
  .hvac101-timeline-item,
  .hvac101-timeline-item:nth-child(even) {
    width: 100%;
    margin-left: 0;
    padding: var(--space-4) 0 var(--space-4) var(--space-10);
  }
  .hvac101-timeline-item::before,
  .hvac101-timeline-item:nth-child(odd)::before,
  .hvac101-timeline-item:nth-child(even)::before {
    left: 8px;
    right: auto;
  }
}

/* --- "Did you know?" Fact Card --- */
.hvac101-fact-card {
  background: linear-gradient(135deg, var(--color-cooling-tint) 0%, var(--color-primary-tint) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-10) 0;
}
.hvac101-fact-card-alt {
  background: linear-gradient(135deg, var(--color-heating-tint) 0%, var(--color-primary-tint) 100%);
}
.hvac101-fact-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-surface);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}
.hvac101-fact-card-alt .hvac101-fact-label { color: var(--color-heating); }
.hvac101-fact-card p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-heading);
  max-width: 740px;
  margin: 0;
  font-weight: var(--font-medium);
}

/* --- Refrigeration Cycle Diagram --- */
.hvac101-cycle-toolbar {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.hvac101-cycle-mode {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.hvac101-cycle-mode:hover { border-color: var(--color-primary); }
.hvac101-cycle-mode.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-on-dark);
}
.hvac101-cycle-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}
.hvac101-cycle-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-8);
  align-items: start;
}
.hvac101-cycle-diagram {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.hvac101-cycle-diagram svg {
  width: 100%;
  height: auto;
  display: block;
}
.hvac101-svg-label {
  font-size: 13px;
  font-weight: var(--font-bold);
  fill: var(--color-text-light);
  letter-spacing: 0.05em;
}
.hvac101-svg-part {
  font-size: 14px;
  font-weight: var(--font-semibold);
  fill: var(--color-text-heading);
}
.hvac101-svg-sub {
  font-size: 11px;
  fill: var(--color-text-light);
}
.hvac101-svg-arrow {
  font-size: 12px;
  font-weight: var(--font-semibold);
}
.hvac101-arrow-cold { fill: var(--color-cooling); }
.hvac101-arrow-hot { fill: var(--color-heating); }
.hvac101-cycle-part {
  cursor: pointer;
  transition: transform var(--transition-fast);
}
.hvac101-cycle-part:hover,
.hvac101-cycle-part:focus-visible {
  outline: none;
  transform: translateY(-2px);
}
.hvac101-cycle-part:hover rect,
.hvac101-cycle-part:focus-visible rect,
.hvac101-cycle-part.active rect {
  filter: brightness(0.97);
  stroke-width: 3;
}
.hvac101-cycle-part.active rect {
  fill: var(--color-primary-tint);
}

/* Refrigerant dot animation */
.hvac101-refrig-dot {
  fill: var(--color-cooling);
  animation: hvac101-refrigerant-flow 8s linear infinite;
  transform-box: fill-box;
}
@keyframes hvac101-refrigerant-flow {
  0%   { transform: translate(120px, 110px); fill: var(--color-cooling); }
  24%  { transform: translate(480px, 110px); fill: var(--color-cooling); }
  26%  { transform: translate(480px, 110px); fill: var(--color-heating); }
  49%  { transform: translate(480px, 270px); fill: var(--color-heating); }
  74%  { transform: translate(120px, 270px); fill: var(--color-heating); }
  76%  { transform: translate(120px, 270px); fill: var(--color-cooling); }
  100% { transform: translate(120px, 110px); fill: var(--color-cooling); }
}
.hvac101-cycle-diagram[data-mode="heating"] .hvac101-refrig-dot {
  animation-direction: reverse;
}
.hvac101-cycle-diagram[data-mode="heating"] .hvac101-arrow-cold {
  fill: var(--color-heating);
}
.hvac101-cycle-diagram[data-mode="heating"] .hvac101-arrow-hot {
  fill: var(--color-cooling);
}
@media (prefers-reduced-motion: reduce) {
  .hvac101-refrig-dot { animation: none; transform: translate(120px, 110px); }
}

.hvac101-cycle-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 90px;
}
.hvac101-cycle-info h3 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xl);
  color: var(--color-text-heading);
}
.hvac101-cycle-info p {
  margin: 0;
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}
.hvac101-cycle-caption {
  margin-top: var(--space-6);
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text-light);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}
@media (max-width: 900px) {
  .hvac101-cycle-wrap { grid-template-columns: 1fr; }
  .hvac101-cycle-info { position: static; }
}

/* --- Split System Anatomy --- */
.hvac101-anatomy-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-8);
  align-items: start;
}
.hvac101-anatomy-diagram {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.hvac101-anatomy-diagram svg {
  width: 100%;
  height: auto;
  display: block;
}
.hvac101-anatomy-part {
  cursor: pointer;
  transition: transform var(--transition-fast);
}
.hvac101-anatomy-part:hover,
.hvac101-anatomy-part:focus-visible {
  outline: none;
  transform: translateY(-2px);
}
.hvac101-anatomy-part:hover rect,
.hvac101-anatomy-part:focus-visible rect,
.hvac101-anatomy-part.active rect,
.hvac101-anatomy-part:hover circle,
.hvac101-anatomy-part:focus-visible circle,
.hvac101-anatomy-part.active circle {
  stroke-width: 3;
  filter: brightness(0.97);
}
.hvac101-anatomy-part.active rect:first-of-type,
.hvac101-anatomy-part.active circle:first-of-type {
  fill: var(--color-primary-tint);
}
.hvac101-anatomy-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 90px;
}
.hvac101-anatomy-info h3 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xl);
  color: var(--color-text-heading);
}
.hvac101-anatomy-info p {
  margin: 0;
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}
@media (max-width: 900px) {
  .hvac101-anatomy-wrap { grid-template-columns: 1fr; }
  .hvac101-anatomy-info { position: static; }
}

/* --- Decibel Chart --- */
.hvac101-decibel-chart {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}
.hvac101-decibel-item {
  position: relative;
}
.hvac101-decibel-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 2.5fr 60px;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font: inherit;
  color: inherit;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}
.hvac101-decibel-row:hover,
.hvac101-decibel-row:focus-visible {
  background: var(--color-bg-alt);
  border-color: var(--color-border);
  outline: none;
}
.hvac101-decibel-row[aria-expanded="true"] {
  background: var(--color-bg-alt);
  border-color: var(--color-primary);
}
.hvac101-decibel-label {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: var(--font-medium);
}
.hvac101-decibel-track {
  height: 28px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}
.hvac101-decibel-row:hover .hvac101-decibel-track,
.hvac101-decibel-row[aria-expanded="true"] .hvac101-decibel-track {
  background: var(--color-surface);
}
.hvac101-decibel-bar {
  height: 100%;
  width: 0;
  border-radius: var(--radius-md);
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.hvac101-decibel-item.visible .hvac101-decibel-bar {
  width: var(--bar-w);
}
.hvac101-decibel-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 360ms ease, padding 300ms ease;
  background: var(--color-bg-alt);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  margin: 0 var(--space-3);
}
.hvac101-decibel-item.open .hvac101-decibel-detail {
  max-height: 320px;
  padding: var(--space-3) var(--space-5) var(--space-4);
}
.hvac101-decibel-detail-inner p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
}
.hvac101-decibel-detail-inner p:last-child { margin-bottom: 0; }
.hvac101-bar-fixar {
  background: linear-gradient(90deg, var(--color-cooling) 0%, var(--color-primary) 100%);
}
.hvac101-bar-ref {
  background: var(--color-gray-medium);
}
.hvac101-bar-warn {
  background: linear-gradient(90deg, var(--color-heating-light) 0%, var(--color-heating) 100%);
}
.hvac101-decibel-value {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
  color: var(--color-text-heading);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
@media (max-width: 600px) {
  .hvac101-decibel-row {
    grid-template-columns: 1fr 50px;
    grid-template-areas: "label value" "track track";
    gap: var(--space-1) var(--space-3);
  }
  .hvac101-decibel-label { grid-area: label; }
  .hvac101-decibel-value { grid-area: value; }
  .hvac101-decibel-track { grid-area: track; }
  .hvac101-decibel-item.open .hvac101-decibel-detail { max-height: 480px; }
}

/* --- Quiz --- */
.hvac101-quiz {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}
.hvac101-quiz-progress {
  height: 6px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-6);
}
.hvac101-quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-cooling), var(--color-primary));
  border-radius: var(--radius-full);
  transition: width 400ms ease-out;
}
.hvac101-quiz-step {
  display: none;
}
.hvac101-quiz-step.active {
  display: block;
  animation: hvac101-quiz-fade 320ms ease-out;
}
@keyframes hvac101-quiz-fade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hvac101-quiz-q {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-heading);
  margin: 0 0 var(--space-5);
}
.hvac101-quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.hvac101-quiz-opt {
  text-align: left;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-alt);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.hvac101-quiz-opt:hover,
.hvac101-quiz-opt:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-surface);
  outline: none;
  transform: translateY(-1px);
}
.hvac101-quiz-result {
  display: none;
  text-align: center;
}
.hvac101-quiz-result.active {
  display: block;
  animation: hvac101-quiz-fade 320ms ease-out;
}
.hvac101-quiz-result-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.hvac101-quiz-result h3 {
  font-size: var(--text-3xl);
  margin: 0 0 var(--space-4);
  color: var(--color-text-heading);
}
.hvac101-quiz-result p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-6);
  color: var(--color-text);
}
.hvac101-quiz-result-cta {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}
@media (max-width: 600px) {
  .hvac101-quiz { padding: var(--space-6) var(--space-4); }
  .hvac101-quiz-options { grid-template-columns: 1fr; }
  .hvac101-quiz-result h3 { font-size: var(--text-2xl); }
}

/* ============================================================================
   HVAC 101 — Round 2 additions
   Fact rotator widget, image slots, decibel detail, cycle/anatomy modernization
   ============================================================================ */

/* --- Rotating Fact Widget --- */
.hvac101-fact-rotator-inner {
  position: relative;
  max-width: 880px;
}
.hvac101-fact-rotator-text {
  min-height: 3.5em;
  transition: opacity 200ms ease;
}
@keyframes hvac101-fact-fade {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hvac101-fact-fade-in {
  animation: hvac101-fact-fade 360ms ease-out;
}
.hvac101-fact-rotator-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.hvac101-fact-rotator-arrow {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-heading);
  font-size: var(--text-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0;
  line-height: 1;
}
.hvac101-fact-rotator-arrow:hover,
.hvac101-fact-rotator-arrow:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
  outline: none;
}
.hvac101-fact-card-alt .hvac101-fact-rotator-arrow:hover,
.hvac101-fact-card-alt .hvac101-fact-rotator-arrow:focus-visible {
  background: var(--color-heating);
  border-color: var(--color-heating);
}
.hvac101-fact-rotator-dots {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  color: var(--color-text-light);
  font-weight: var(--font-medium);
}
.hvac101-fact-rotator-dots::before {
  content: '↻ auto-rotating';
  letter-spacing: 0.04em;
}

/* --- Timeline image slot --- */
.hvac101-timeline-img {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0 0 var(--space-3);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
  aspect-ratio: 280 / 180;
}
.hvac101-timeline-img[hidden] { display: none; }
.hvac101-timeline-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* --- System type card thumbnail slot --- */
.hvac101-type-thumb {
  display: block;
  width: calc(100% + var(--space-12));
  margin: calc(-1 * var(--space-6)) calc(-1 * var(--space-6)) var(--space-4);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  background: var(--color-bg-alt);
  aspect-ratio: 320 / 200;
}
.hvac101-type-thumb[hidden] { display: none; }
.hvac101-type-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* When the thumb illustration is showing, dial the icon down so it
   reads as a category badge under the artwork instead of duplicating it. */
.service-card .hvac101-type-thumb:not([hidden]) + .card-icon {
  font-size: var(--text-xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-2);
}

/* --- Refrigeration cycle info panel (image + text layout) --- */
.hvac101-cycle-info-media,
.hvac101-anatomy-info-media {
  width: 100%;
  border-radius: var(--radius-md);
  background: var(--color-bg-alt);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hvac101-cycle-info-media[data-empty="true"],
.hvac101-anatomy-info-media[data-empty="true"] {
  display: none;
}
.hvac101-cycle-info-media img,
.hvac101-anatomy-info-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hvac101-cycle-info-text,
.hvac101-anatomy-info-text {
  display: block;
}

/* --- Refrigeration cycle modernization --- */
.hvac101-cycle-diagram {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg-alt) 100%);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06), var(--shadow-sm);
}
.hvac101-cycle-part rect {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.08));
  transition: filter var(--transition-fast), fill var(--transition-fast);
}
.hvac101-cycle-part:hover rect,
.hvac101-cycle-part:focus-visible rect,
.hvac101-cycle-part.active rect {
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.15));
}
.hvac101-cycle-part.active rect {
  animation: hvac101-cycle-pulse 1.6s ease-in-out infinite;
}
@keyframes hvac101-cycle-pulse {
  0%, 100% { stroke-width: 2.5; }
  50% { stroke-width: 4; }
}
.hvac101-refrig-dot {
  filter: drop-shadow(0 0 4px currentColor);
}

/* --- Anatomy modernization --- */
.hvac101-anatomy-diagram {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg-alt) 100%);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06), var(--shadow-sm);
}
.hvac101-anatomy-part rect,
.hvac101-anatomy-part circle {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.08));
  transition: filter var(--transition-fast), fill var(--transition-fast);
}
.hvac101-anatomy-part:hover rect,
.hvac101-anatomy-part:focus-visible rect,
.hvac101-anatomy-part.active rect,
.hvac101-anatomy-part:hover circle,
.hvac101-anatomy-part:focus-visible circle,
.hvac101-anatomy-part.active circle {
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.18));
}
.hvac101-anatomy-part.active rect:first-of-type,
.hvac101-anatomy-part.active circle:first-of-type {
  animation: hvac101-cycle-pulse 1.6s ease-in-out infinite;
}

/* --- Responsive: rotator controls + info-panel layouts --- */
@media (max-width: 600px) {
  .hvac101-fact-rotator-controls {
    flex-wrap: wrap;
  }
  .hvac101-fact-rotator-dots::before {
    content: '↻';
  }
  .hvac101-stat::after { display: none; }
}
@media (max-width: 900px) {
  .hvac101-cycle-info-media,
  .hvac101-anatomy-info-media {
    aspect-ratio: 16 / 9;
    max-height: 220px;
  }
}