/* =============================================================
   CLIMATE CONTROL PRO — styles.css
   Data Design Dynamics Premium Demo
   ============================================================= */

/* =============================================================
   1. CUSTOM PROPERTIES
   ============================================================= */
:root {
  --color-primary:      #0F1E3D;
  --color-accent:       #E06420;
  --color-accent-blue:  #4A90D9;
  --color-bg:           #FFFFFF;
  --color-bg-2:         #F4F7FB;
  --color-bg-dark:      #080F1E;
  --color-text:         #1A1A1A;
  --color-text-muted:   #5A6880;
  --color-text-light:   #EFF3FA;

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.14);
  --shadow-xl:  0 20px 60px rgba(0,0,0,.18);

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --transition:       0.22s ease;
  --transition-fast:  0.14s ease;
  --transition-base:  0.22s ease;
  --transition-slow:  0.38s ease;
  --nav-h:      72px;
  --banner-h:   40px;
}

/* =============================================================
   2. RESET + BASE
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* =============================================================
   3. TYPOGRAPHY
   ============================================================= */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: 1.15;
  color: var(--color-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.6rem); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); font-weight: 600; }
h4 { font-size: 1.15rem; font-weight: 600; }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.6rem;
}
.eyebrow--blue  { color: var(--color-accent-blue); }
.eyebrow--light { color: rgba(255,255,255,0.7); }

/* =============================================================
   4. UTILITIES
   ============================================================= */
.container        { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container--wide  { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.container--narrow{ max-width: 800px;  margin: 0 auto; padding: 0 24px; }

.section    { padding: 88px 0; }
.section--sm{ padding: 56px 0; }
.section--lg{ padding: 120px 0; }

.section--dark  { background: var(--color-bg-dark); color: var(--color-text-light); }
.section--dark h1,.section--dark h2,.section--dark h3 { color: #fff; }
.section--navy  { background: var(--color-primary); color: var(--color-text-light); }
.section--navy h2,.section--navy h3 { color: #fff; }
.section--off   { background: var(--color-bg-2); }
.section--bg    { background: var(--color-bg-2); }   /* alias for section--off */
.section--accent{ background: var(--color-accent); color: #fff; }
.section--accent h2 { color: #fff; }

.text-center { text-align: center; }
.text-light  { color: var(--color-text-light); }
.text-muted  { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-blue   { color: var(--color-accent-blue); }
.text-white  { color: #fff; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr;           gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr);    gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr);    gap: 24px; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: 8px; }
.gap-md { gap: 16px; }
.gap-lg { gap: 32px; }

.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 32px; }
.mt-xl { margin-top: 48px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 32px; }

/* =============================================================
   5. COMPONENTS
   ============================================================= */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: #c8561a;
  border-color: #c8561a;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(224,100,32,.35);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}
.btn--outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline-dark:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--blue {
  background: var(--color-accent-blue);
  color: #fff;
  border-color: var(--color-accent-blue);
}
.btn--blue:hover { background: #3a7bbf; border-color: #3a7bbf; }

.btn--white {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn--white:hover { background: var(--color-bg-2); }

.btn--lg { padding: 18px 38px; font-size: 1.05rem; }
.btn--sm { padding: 10px 20px; font-size: 0.875rem; }
.btn--xl { padding: 22px 48px; font-size: 1.2rem; border-radius: var(--radius-lg); }

/* --- Cards --- */
.card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card__body { padding: 28px; }

.card__icon {
  width: 56px;
  height: 56px;
  background: rgba(224,100,32,.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-accent);
}

/* --- Badges --- */
.badge { display: inline-block; padding: 4px 12px; border-radius: 100px; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; }
.badge--accent { background: rgba(224,100,32,.12); color: var(--color-accent); }
.badge--blue   { background: rgba(74,144,217,.12);  color: var(--color-accent-blue); }
.badge--navy   { background: rgba(15,30,61,.1);     color: var(--color-primary); }
.badge--green  { background: rgba(16,185,129,.1);   color: #059669; }

/* --- Divider --- */
.divider { height: 3px; width: 48px; background: var(--color-accent); margin: 20px 0 28px; }
.divider--center { margin: 20px auto 28px; }
.divider--blue   { background: var(--color-accent-blue); }

/* --- Section Header --- */
.section-header { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.section-header .divider { margin: 16px auto 24px; }

/* --- Accordion --- */
.accordion { border-top: 1px solid #e8ecf2; }
.accordion__item { border-bottom: 1px solid #e8ecf2; }
.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  gap: 16px;
}
.accordion__trigger:hover { color: var(--color-accent); }
.accordion__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-bg-2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition);
}
.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(45deg);
  background: var(--color-accent);
  color: #fff;
}
.accordion__panel { display: none; padding: 0 0 20px; color: var(--color-text-muted); line-height: 1.7; }
.accordion__panel.is-open { display: block; }

/* --- Checklist --- */
.checklist { display: flex; flex-direction: column; gap: 12px; }
.checklist__item { display: flex; align-items: flex-start; gap: 12px; font-size: 0.95rem; }
.checklist__icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(224,100,32,.12);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.checklist--green .checklist__icon { background: rgba(16,185,129,.1); color: #059669; }

/* --- Stars --- */
.stars { display: flex; gap: 2px; color: #F5B31B; font-size: 1rem; }

/* --- Testimonial Card --- */
.testimonial-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}
.testimonial-card__quote { font-family: var(--font-heading); font-size: 3rem; color: var(--color-accent); line-height: 1; margin-bottom: 12px; opacity: 0.4; }
.testimonial-card__text  { color: var(--color-text-muted); font-size: 0.975rem; line-height: 1.75; margin-bottom: 20px; }
.testimonial-card__author { display: flex; align-items: center; gap: 12px; }
.testimonial-card__avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 1.1rem; flex-shrink: 0;
}
.testimonial-card__name { font-weight: 700; font-size: 0.9rem; color: var(--color-primary); }
.testimonial-card__sub  { font-size: 0.8rem; color: var(--color-text-muted); }

/* --- Plan Cards --- */
.plan-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 2px solid #e8ecf2;
  padding: 36px 32px;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}
.plan-card:hover { border-color: var(--color-accent-blue); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.plan-card--featured { border-color: var(--color-accent); box-shadow: var(--shadow-lg); }
.plan-card__popular {
  position: absolute; top: 16px; right: 16px;
  background: var(--color-accent); color: #fff;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 100px;
}
.plan-card__price { font-family: var(--font-heading); font-size: 2.6rem; font-weight: 700; color: var(--color-primary); line-height: 1; margin: 12px 0 4px; }
.plan-card__price span { font-size: 1rem; font-weight: 400; color: var(--color-text-muted); }
.plan-card h3 { font-size: 1.25rem; margin-bottom: 4px; }

/* --- Process Steps --- */
.process-steps { display: flex; gap: 0; position: relative; }
.process-steps::before {
  content: '';
  position: absolute;
  top: 28px; left: 28px; right: 28px;
  height: 2px; background: #e8ecf2; z-index: 0;
}
.step { flex: 1; display: flex; flex-direction: column; align-items: center; text-align: center; position: relative; z-index: 1; padding: 0 16px; }
.step__number {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--color-primary); color: #fff;
  font-weight: 700; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-bg-2);
}
.step__title { font-weight: 700; font-size: 0.95rem; color: var(--color-primary); margin-bottom: 6px; }
.step__desc  { font-size: 0.85rem; color: var(--color-text-muted); }

/* --- Offer Cards --- */
.offer-card { background: #fff; border-radius: var(--radius-lg); border: 2px solid #e8ecf2; padding: 32px; position: relative; overflow: hidden; }
.offer-card__ribbon { position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--color-accent); }
.offer-card--blue .offer-card__ribbon  { background: var(--color-accent-blue); }
.offer-card--green .offer-card__ribbon { background: #10b981; }
.offer-card--navy .offer-card__ribbon  { background: var(--color-primary); }
.offer-card__discount { font-family: var(--font-heading); font-size: 3rem; font-weight: 700; color: var(--color-accent); line-height: 1; margin-bottom: 4px; }
.offer-card__expires  { font-size: 0.78rem; color: var(--color-text-muted); margin-top: 12px; }

/* --- Rating Badges --- */
.rating-badges { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.rating-badge { background: #fff; border-radius: var(--radius-lg); padding: 24px 32px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 16px; }
.rating-badge__score { font-family: var(--font-heading); font-size: 2.8rem; font-weight: 700; color: var(--color-primary); line-height: 1; }
.rating-badge__label { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 4px; }

/* --- Service area chips --- */
.city-grid { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.city-chip {
  display: flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid #e8ecf2; border-radius: 100px;
  padding: 10px 20px; font-size: 0.9rem; font-weight: 500; color: var(--color-primary);
  box-shadow: var(--shadow-sm); transition: all var(--transition);
}
.city-chip:hover { border-color: var(--color-accent); color: var(--color-accent); box-shadow: var(--shadow-md); }
.city-chip svg { color: var(--color-accent); }

/* --- FAQ Category --- */
.faq-category { margin-bottom: 48px; }
.faq-category__title {
  font-size: 1.1rem; font-weight: 700; color: var(--color-accent);
  text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--font-body);
  margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--color-accent);
}

/* --- Emergency Callout --- */
.emergency-callout {
  background: rgba(224,100,32,.07);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex; gap: 20px; align-items: flex-start;
}
.emergency-callout__icon {
  width: 48px; height: 48px;
  background: var(--color-accent); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; color: #fff; flex-shrink: 0;
}
.emergency-callout__title { font-weight: 700; color: var(--color-accent); margin-bottom: 6px; font-size: 1.05rem; }

/* --- Comparison Table --- */
.comparison-table { width: 100%; border-collapse: collapse; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.comparison-table th { background: var(--color-primary); color: #fff; padding: 16px 20px; text-align: center; font-size: 0.9rem; font-weight: 600; }
.comparison-table th:first-child { text-align: left; }
.comparison-table td { padding: 14px 20px; text-align: center; font-size: 0.9rem; border-bottom: 1px solid #f0f3f8; }
.comparison-table td:first-child { text-align: left; font-weight: 500; color: var(--color-primary); }
.comparison-table tr:nth-child(even) td { background: var(--color-bg-2); }
.comparison-table .check { color: #059669; }
.comparison-table .cross { color: #dc2626; }

/* --- Breadcrumb --- */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: rgba(255,255,255,0.55); margin-bottom: 16px; }
.breadcrumb a { color: rgba(255,255,255,0.7); transition: color var(--transition); }
.breadcrumb a:hover { color: #fff; }

/* --- Info Box --- */
.info-box { background: var(--color-bg-2); border-left: 4px solid var(--color-accent-blue); border-radius: 0 var(--radius-md) var(--radius-md) 0; padding: 20px 24px; margin: 24px 0; }
.info-box--accent { border-left-color: var(--color-accent); background: rgba(224,100,32,.06); }

/* =============================================================
   6. NAVIGATION
   ============================================================= */
.nav {
  position: fixed;
  top: var(--banner-h);
  left: 0; right: 0;
  z-index: 900;
  height: var(--nav-h);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow-md); background: rgba(255,255,255,0.98); }

/* When the mobile menu is open, suppress backdrop-filter on the nav.
   backdrop-filter creates a new containing block which breaks
   position:fixed for descendants (.nav__mobile drawer would otherwise
   collapse into the nav bar instead of filling the viewport). */
.nav:has(.nav__mobile.is-open) {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(255,255,255,1);
}

.nav__inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}

.nav__logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-heading); font-size: 1.15rem; font-weight: 700;
  color: var(--color-primary); text-decoration: none; flex-shrink: 0;
}
.nav__logo-sub { display: flex; flex-direction: column; }
.nav__logo-name { line-height: 1.1; }
.nav__logo-tag  { font-family: var(--font-body); font-size: 0.6rem; font-weight: 500; color: var(--color-text-muted); letter-spacing: 0.06em; margin-top: 1px; }

.nav__links { display: flex; align-items: center; gap: 2px; }
.nav__link { font-size: 0.88rem; font-weight: 500; color: var(--color-text); padding: 8px 11px; border-radius: var(--radius-sm); transition: color var(--transition), background var(--transition); text-decoration: none; }
.nav__link:hover { color: var(--color-accent); background: rgba(224,100,32,.06); }
.nav__link.active { color: var(--color-accent); font-weight: 600; }

.nav__emergency {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.82rem; font-weight: 700; color: var(--color-accent);
  text-decoration: none; white-space: nowrap;
  padding: 6px 11px; border-radius: var(--radius-sm);
  background: rgba(224,100,32,.07);
  transition: background var(--transition);
}
.nav__emergency:hover { background: rgba(224,100,32,.14); }

.nav__cta { flex-shrink: 0; padding: 10px 18px; font-size: 0.85rem; }

.nav__hamburger { display: none; flex-direction: column; gap: 5px; width: 32px; cursor: pointer; padding: 4px; }
.nav__hamburger span { display: block; height: 2px; background: var(--color-primary); border-radius: 2px; transition: all 0.3s ease; }
.nav__hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.is-active span:nth-child(2) { opacity: 0; }
.nav__hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  position: fixed;
  top: calc(var(--banner-h) + var(--nav-h));
  left: 0; right: 0;
  background: #fff;
  padding: 20px 24px 32px;
  box-shadow: var(--shadow-lg);
  z-index: 899;
  border-top: 1px solid #f0f3f8;
  max-height: calc(100vh - var(--banner-h) - var(--nav-h));
  overflow-y: auto;
}
.nav__mobile.is-open { display: block; }
.nav__mobile .nav__link { display: block; padding: 12px 0; border-bottom: 1px solid #f0f3f8; font-size: 1rem; }
.nav__mobile .nav__emergency { margin-top: 16px; justify-content: center; font-size: 1rem; padding: 12px; }
.nav__mobile .btn { width: 100%; justify-content: center; margin-top: 12px; }

.page-offset { padding-top: calc(var(--banner-h) + var(--nav-h)); }

/* =============================================================
   7. DEMO BANNER
   ============================================================= */
.demo-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--banner-h);
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 500; gap: 8px;
  text-align: center; padding: 0 16px;
}
.demo-banner a { color: var(--color-accent); font-weight: 700; text-decoration: underline; text-underline-offset: 2px; }
.demo-banner a:hover { color: #f07a3a; }

/* =============================================================
   8. EMERGENCY STRIP
   ============================================================= */
.emergency-strip {
  background: var(--color-accent); color: #fff;
  text-align: center; padding: 16px 24px;
  font-size: 0.95rem; font-weight: 600; letter-spacing: 0.02em;
}
.emergency-strip a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* =============================================================
   9. HERO VARIANTS
   ============================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center; background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(8,15,30,0.82) 0%, rgba(15,30,61,0.65) 50%, rgba(8,15,30,0.45) 100%);
}

.hero__content { position: relative; z-index: 2; max-width: 760px; padding: 40px 0; }
.hero h1 { color: #fff; margin-bottom: 20px; }
.hero p  { color: rgba(255,255,255,0.88); font-size: 1.15rem; max-width: 560px; }
.hero__ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 36px; }

/* Hero trust badges */
.hero__trust {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 28px;
}
.hero__trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.20);
  border-radius: 100px;
  padding: 8px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.hero__trust-badge svg { color: var(--color-accent); flex-shrink: 0; }

/* Hero scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}
.hero__scroll-text { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.45); }
.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scroll-line 1.8s ease-in-out infinite;
}
@keyframes scroll-line {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  100% { transform: scaleY(1); transform-origin: bottom; opacity: 0; }
}

/* Certifications strip */
.cert-strip { background: var(--color-bg-2); padding: 40px 0; border-bottom: 1px solid #e8ecf2; }
.cert-strip__grid { display: flex; gap: 32px; justify-content: center; align-items: center; flex-wrap: wrap; }
.cert-badge {
  display: flex; align-items: center; gap: 12px;
  background: #fff; border-radius: var(--radius-md); padding: 14px 20px;
  box-shadow: var(--shadow-sm); font-size: 0.85rem; font-weight: 600; color: var(--color-primary);
  border: 1px solid #e8ecf2;
  transition: box-shadow var(--transition), transform var(--transition);
}
.cert-badge:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.cert-badge__icon { width: 36px; height: 36px; background: rgba(224,100,32,.10); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-accent); flex-shrink: 0; }
.cert-badge__sub { font-size: 0.72rem; font-weight: 400; color: var(--color-text-muted); }

/* Page hero */
.page-hero {
  background: var(--color-primary);
  padding: 80px 0 64px;
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url('https://loremflickr.com/1920/1080/hvac,air-conditioning,heating/all?lock=10') center/cover;
  opacity: 0.10;
}
.page-hero__content { position: relative; z-index: 2; }
.page-hero h1 { color: #fff; margin-bottom: 12px; }
.page-hero p  { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 600px; }

/* Emergency hero */
.hero--emergency { min-height: 80vh; }
.hero--emergency .hero__overlay { background: linear-gradient(to bottom, rgba(8,15,30,0.90) 0%, rgba(8,15,30,0.78) 100%); }
.hero--emergency .hero__content { text-align: center; max-width: 900px; margin: 0 auto; }
.hero--emergency h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }

/* =============================================================
   10. SECTION TYPES
   ============================================================= */

/* Stats Bar */
.stats-bar { background: var(--color-primary); padding: 48px 0; }
.stats-bar__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat { padding: 16px; }
.stat__number { font-family: var(--font-heading); font-size: 2.4rem; font-weight: 700; color: #fff; line-height: 1; margin-bottom: 6px; }
.stat__number em { color: var(--color-accent); font-style: normal; }
.stat__label { font-size: 0.82rem; color: rgba(255,255,255,0.6); letter-spacing: 0.05em; }

/* Services Grid */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid #e8ecf2;
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.service-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0;
  height: 3px; background: var(--color-accent);
  transform: scaleX(0); transition: transform var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-card:hover::after { transform: scaleX(1); }
.service-card__icon {
  width: 56px; height: 56px; background: rgba(224,100,32,.09);
  border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--color-accent);
}
.service-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.service-card p  { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 18px; }
.service-card__link { font-size: 0.875rem; font-weight: 600; color: var(--color-accent); display: flex; align-items: center; gap: 4px; transition: gap var(--transition); }
.service-card:hover .service-card__link { gap: 8px; }

/* Split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 0; align-items: stretch; }
.split--reverse { direction: rtl; }
.split--reverse > * { direction: ltr; }
.split__image { position: relative; min-height: 480px; overflow: hidden; }
.split__image img { width: 100%; height: 100%; object-fit: cover; }
.split__content { padding: 72px 64px; display: flex; flex-direction: column; justify-content: center; }

/* Features */
.features { display: flex; flex-direction: column; gap: 24px; margin-top: 28px; }
.feature { display: flex; gap: 16px; align-items: flex-start; }
.feature__icon {
  width: 48px; height: 48px; background: rgba(224,100,32,.09);
  border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center;
  color: var(--color-accent); flex-shrink: 0;
}
.feature__title { font-weight: 700; font-size: 1rem; margin-bottom: 4px; color: var(--color-primary); }
.feature__desc  { font-size: 0.875rem; color: var(--color-text-muted); }

/* Financing teaser */
.financing-teaser { background: linear-gradient(135deg, var(--color-primary) 0%, #1a3066 100%); padding: 72px 0; text-align: center; }
.financing-teaser h2 { color: #fff; margin-bottom: 12px; }
.financing-teaser p  { color: rgba(255,255,255,0.75); margin-bottom: 32px; font-size: 1.05rem; }

/* CTA split */
.cta-split { display: grid; grid-template-columns: 1fr 1fr; min-height: 420px; }
.cta-split__image { background-size: cover; background-position: center; }
.cta-split__content { background: var(--color-bg-dark); padding: 72px 64px; display: flex; flex-direction: column; justify-content: center; }
.cta-split__content h2 { color: #fff; margin-bottom: 12px; }
.cta-split__content p  { color: rgba(255,255,255,0.7); margin-bottom: 32px; }

/* =============================================================
   11. BLOG CARDS
   ============================================================= */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }

.blog-card {
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  overflow: hidden; transition: transform var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column;
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.blog-card--featured { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; }
.blog-card__image { aspect-ratio: 16/9; overflow: hidden; }
.blog-card--featured .blog-card__image { aspect-ratio: unset; min-height: 340px; }
.blog-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.blog-card:hover .blog-card__image img { transform: scale(1.04); }
.blog-card__body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.blog-card__meta { display: flex; align-items: center; gap: 12px; font-size: 0.78rem; color: var(--color-text-muted); margin-bottom: 12px; flex-wrap: wrap; }
.blog-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.blog-card p  { font-size: 0.9rem; color: var(--color-text-muted); flex: 1; }
.blog-card__link { display: flex; align-items: center; gap: 4px; font-size: 0.875rem; font-weight: 600; color: var(--color-accent); margin-top: 18px; transition: gap var(--transition); }
.blog-card:hover .blog-card__link { gap: 8px; }

/* Newsletter */
.newsletter-strip { background: var(--color-primary); padding: 64px 0; }
.newsletter-strip h2 { color: #fff; margin-bottom: 8px; }
.newsletter-strip p  { color: rgba(255,255,255,0.7); }
.newsletter-form { display: flex; gap: 12px; max-width: 480px; margin-top: 24px; }
.newsletter-form input { flex: 1; padding: 14px 18px; border-radius: var(--radius-md); border: none; font-size: 0.95rem; outline: none; }

/* =============================================================
   12. BOOKING & CONTACT FORMS
   ============================================================= */
.booking-form { background: #fff; border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); padding: 48px; }
.contact-form  { background: #fff; border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow-lg); }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group--full { grid-column: 1 / -1; }

.form-label { font-size: 0.85rem; font-weight: 600; color: var(--color-primary); letter-spacing: 0.02em; }
.form-label .required { color: var(--color-accent); margin-left: 2px; }

.form-input {
  padding: 12px 16px;
  border: 1.5px solid #d8dfe8;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-input:focus { border-color: var(--color-accent-blue); box-shadow: 0 0 0 3px rgba(74,144,217,.15); }
.form-input::placeholder { color: #9aa4b5; }
textarea.form-input { resize: vertical; min-height: 120px; }
select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%235A6880' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; padding-right: 40px;
}

/* Confirmation note */
.confirm-note {
  background: rgba(74,144,217,.08);
  border: 1px solid rgba(74,144,217,.25);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-top: 24px;
}

/* =============================================================
   13. FOOTER
   ============================================================= */
.footer { background: var(--color-bg-dark); color: var(--color-text-light); padding: 72px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.footer__brand h3 { color: #fff; font-family: var(--font-heading); font-size: 1.3rem; margin-bottom: 12px; }
.footer__brand p  { color: rgba(255,255,255,0.45); font-size: 0.875rem; line-height: 1.7; }
.footer__contact-item { display: flex; align-items: flex-start; gap: 10px; font-size: 0.875rem; color: rgba(255,255,255,0.65); margin-top: 14px; }
.footer__contact-item svg { color: var(--color-accent); margin-top: 2px; flex-shrink: 0; }
.footer__contact-item a { color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer__contact-item a:hover { color: var(--color-accent); }
.footer__col-title { color: #fff; font-family: var(--font-body); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 20px; }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: 0.875rem; color: rgba(255,255,255,0.5); text-decoration: none; transition: color var(--transition); }
.footer__links a:hover { color: var(--color-accent); }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; font-size: 0.78rem; color: rgba(255,255,255,0.3); flex-wrap: wrap; gap: 12px; }
.footer__bottom a { color: rgba(255,255,255,0.4); }
.footer__bottom a:hover { color: #fff; }
.footer__license { font-size: 0.75rem; color: rgba(255,255,255,0.28); margin-top: 10px; }

/* =============================================================
   14. ANIMATIONS
   ============================================================= */
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(224,100,32,.65); }
  70%  { box-shadow: 0 0 0 18px rgba(224,100,32,0); }
  100% { box-shadow: 0 0 0 0 rgba(224,100,32,0); }
}
.btn--pulse { animation: pulse-ring 2.2s ease-out infinite; }

@keyframes phone-ring {
  0%,60%,100% { transform: rotate(0); }
  10%  { transform: rotate(-18deg); }
  20%  { transform: rotate(18deg); }
  30%  { transform: rotate(-12deg); }
  40%  { transform: rotate(12deg); }
  50%  { transform: rotate(-6deg); }
}
.phone-ring { animation: phone-ring 3.5s ease-in-out infinite; display: inline-block; }

/* Fade-in-up */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.10s; }
.reveal-delay-2 { transition-delay: 0.20s; }
.reveal-delay-3 { transition-delay: 0.30s; }
.reveal-delay-4 { transition-delay: 0.40s; }
.reveal-delay-5 { transition-delay: 0.50s; }

/* =============================================================
   15. RESPONSIVE
   ============================================================= */
@media (max-width: 1280px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 1024px) {
  .nav__links     { display: none; }
  .nav__emergency { display: none; }
  .nav__cta       { display: none; }
  .nav__hamburger { display: flex; }

  .hero__content { max-width: 90%; }
  .split { grid-template-columns: 1fr; }
  .split__content { padding: 48px 40px; }
  .split__image { min-height: 320px; }
  .split--reverse { direction: ltr; }

  .services-grid { grid-template-columns: 1fr 1fr; }
  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }

  .process-steps::before { display: none; }
  .process-steps { flex-direction: column; align-items: flex-start; gap: 16px; }
  .step { flex-direction: row; text-align: left; gap: 16px; }
  .step__number { margin-bottom: 0; flex-shrink: 0; }

  .blog-card--featured { grid-template-columns: 1fr; }
  .blog-card--featured .blog-card__image { min-height: 240px; }

  .cta-split { grid-template-columns: 1fr; }
  .cta-split__image { min-height: 300px; }
  .cta-split__content { padding: 48px 40px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .section { padding: 64px 0; }
  .section--lg { padding: 80px 0; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .services-grid   { grid-template-columns: 1fr; }
  .grid-2          { grid-template-columns: 1fr; }
  .grid-3          { grid-template-columns: 1fr; }
  .grid-4          { grid-template-columns: 1fr 1fr; }
  .stats-bar__grid { grid-template-columns: 1fr 1fr; }
  .split__content  { padding: 36px 24px; }
  .cta-split__content { padding: 40px 24px; }

  .blog-grid { grid-template-columns: 1fr; }
  .booking-form { padding: 28px 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group--full { grid-column: 1; }

  .footer__grid  { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .rating-badges { flex-direction: column; align-items: stretch; }
  .hero__ctas    { flex-direction: column; }
  .hero__ctas .btn { width: 100%; justify-content: center; }
  .hero__trust   { gap: 12px; }
  .hero__scroll  { display: none; }
  .cert-strip__grid { gap: 16px; }
  .newsletter-form { flex-direction: column; }
  .section-header { margin-bottom: 40px; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .plan-card { padding: 28px 20px; }
  .testimonial-card { padding: 24px 20px; }
  .comparison-table td, .comparison-table th { padding: 12px 8px; font-size: 0.78rem; }
  .contact-form { padding: 24px 16px; }
}

/* ============================================================
   PRE-LAUNCH RESPONSIVE POLISH (Climate Pro)
   Appended additions only — no existing rules modified.
   ============================================================ */

/* Booking page layout — sidebar collapses below form on mobile */
.booking-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}

@media (max-width: 860px) {
  .booking-layout {
    grid-template-columns: 1fr;
  }
}

/* Blog newsletter strip — collapses to single column on tablet/mobile */
.newsletter-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 768px) {
  .newsletter-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* Global safety nets */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}
img, svg, video, iframe {
  max-width: 100%;
  height: auto;
}

/* Fix hero stacking on subpages: when .hero also has .page-offset,
   the 100vh + padding-top stack pushes hero past viewport (~112vh).
   Subtract the banner + nav so hero fills exactly what's visible. */
.hero.page-offset {
  min-height: calc(100vh - var(--banner-h) - var(--nav-h));
}

@media (max-width: 768px) {
  .hero {
    min-height: min(100svh, 720px);
  }
  .hero.page-offset {
    min-height: min(calc(100svh - var(--banner-h) - var(--nav-h)), 640px);
  }
}

/* Comparison-table overflow fallback — horizontal scroll on narrow
   viewports so the table doesn't crush text into illegible widths. */
@media (max-width: 720px) {
  .comparison-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }
  .comparison-table th,
  .comparison-table td {
    white-space: normal;
  }
}

/* Newsletter input touch comfort on mobile */
@media (max-width: 768px) {
  .newsletter-form input,
  .newsletter-form button {
    min-height: 48px;
    font-size: 1rem;
  }
}

/* Touch-comfortable contact form inputs */
@media (max-width: 768px) {
  .contact-form input[type="text"],
  .contact-form input[type="email"],
  .contact-form input[type="tel"],
  .contact-form input[type="url"],
  .contact-form select,
  .contact-form textarea {
    min-height: 48px;
    font-size: 1rem;
  }
  .contact-form textarea {
    min-height: 140px;
  }
}

/* Section padding floor at very narrow widths */
@media (max-width: 360px) {
  .container,
  .container-sm {
    padding-inline: 1rem;
  }
}