:root {
  --color-primary: #3A3F45;
  --color-secondary: #1F2328;
  --color-surface: #E8E9EB;
  --color-bg: #F7F8FA;
  --color-accent-orange: #FF6A00;
  --color-accent-blue: #2563EB;
  --color-accent-green: #5E7C61;
  --color-accent-yellow: #F2B705;
  --font-primary: 'DM Sans', sans-serif;
  --font-display: 'Outfit', sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 0.2s ease;
  --transition-mid: 0.3s ease;
  --shadow-sm: 0 2px 8px rgba(31, 35, 40, 0.08);
  --shadow-md: 0 4px 16px rgba(31, 35, 40, 0.12);
  --shadow-lg: 0 8px 32px rgba(31, 35, 40, 0.16);
}

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

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-primary);
  background: var(--color-bg);
  overflow-x: hidden;
}

body main {
  flex: 1 0 auto;
}

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

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

a:hover,
a:focus {
  color: var(--color-accent-orange);
}

.header-wrap {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transform: translateY(0);
  transition: transform var(--transition-mid);
}

.header-wrap.hidden {
  transform: translateY(-100%);
}

.site-header {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  box-shadow: var(--shadow-md);
}

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--color-bg);
  margin: 0;
}

.site-logo span {
  white-space: nowrap;
}

.site-logo:hover {
  color: var(--color-bg);
}

.nav-desktop {
  display: none;
}

.nav-desktop .nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-lg);
}

.nav-desktop .nav-link {
  color: var(--color-bg);
  font-weight: 500;
}

.nav-desktop .nav-link:hover {
  color: var(--color-accent-orange);
}

.burger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-bg);
  transition: background var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

.burger-btn:hover,
.burger-btn:focus {
  background: rgba(255, 255, 255, 0.1);
}

.burger-btn[aria-expanded="true"] .burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger-btn[aria-expanded="true"] .burger-line:nth-child(2) {
  opacity: 0;
}

.burger-btn[aria-expanded="true"] .burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.burger-line {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--transition-mid), opacity var(--transition-fast);
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: min(280px, 85%);
  height: 100vh;
  background: var(--color-secondary);
  padding: calc(60px + var(--space-lg)) var(--space-lg) var(--space-lg);
  transform: translateX(100%);
  transition: transform var(--transition-mid);
  z-index: 999;
  overflow-y: auto;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu .nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-menu .nav-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu .nav-link {
  display: block;
  padding: var(--space-md);
  color: var(--color-bg);
  font-weight: 500;
}

.mobile-menu .nav-link:hover {
  color: var(--color-accent-orange);
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-mid), visibility var(--transition-mid);
  z-index: 998;
}

.menu-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

main {
  padding-top: 60px;
  min-height: 60vh;
}

.hero-block {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  background: var(--color-secondary) linear-gradient(180deg, rgba(31, 35, 40, 0.85) 0%, rgba(58, 63, 69, 0.9) 100%);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-hero {
  background-image: url('../images/creation_2434375426.webp');
}

.section-cta-wrap {
  margin-top: var(--space-md);
}

.popup-link {
  color: var(--color-accent-yellow);
}

.popup-link:hover {
  color: var(--color-bg);
}

.hero-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 40px,
    rgba(255, 255, 255, 0.02) 40px,
    rgba(255, 255, 255, 0.02) 41px
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-bg);
  margin: 0 0 var(--space-md);
  line-height: 1.2;
}

.hero-text {
  color: var(--color-surface);
  margin: 0 0 var(--space-lg);
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background: var(--color-accent-orange);
  color: #fff;
}

.btn-primary:hover {
  background: #e55f00;
}

.btn-secondary {
  background: transparent;
  color: var(--color-bg);
  border: 2px solid var(--color-surface);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-bg);
}

.section {
  padding: var(--space-xl) var(--space-md);
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(58, 63, 69, 0.12);
}

.section:first-of-type {
  border-top: none;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin: 0 0 var(--space-lg);
  text-align: center;
}

.section-title-alt {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
}

.features-strip {
  background: var(--color-surface);
}

.features-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  max-width: 900px;
  margin: 0 auto;
}

.features-item {
  padding-left: 1.5rem;
  position: relative;
}

.features-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  background: var(--color-accent-orange);
  border-radius: 50%;
}

.problem-solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.problem-solution-text h2,
.problem-solution-visual h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 var(--space-sm);
}

.problem-solution-text img,
.problem-solution-visual img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .problem-solution {
    grid-template-columns: 1fr;
  }
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.category-card {
  background: var(--color-bg);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-orange);
}

.category-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

.category-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.builder-preview {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-top: var(--space-lg);
}

.builder-preview img {
  width: 100%;
  border-radius: var(--radius-sm);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.testimonial-card {
  background: var(--color-bg);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: box-shadow var(--transition-fast);
}

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

.testimonial-card img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

.testimonial-card blockquote {
  margin: 0;
  font-style: italic;
  color: var(--color-primary);
}

.page-hero {
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  background: var(--color-secondary);
  color: var(--color-bg);
  background-size: cover;
  background-position: center;
  position: relative;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(31, 35, 40, 0.75) 0%, rgba(31, 35, 40, 0.85) 100%);
  pointer-events: none;
}

.page-hero h1,
.page-hero p {
  position: relative;
  z-index: 1;
}

.page-hero-products {
  background-image: url('../images/creation_2434381560.webp');
}

.page-hero-contact {
  background-image: url('../images/creation_2434381572.webp');
}

.page-hero-cooling {
  background-image: url('../images/creation_2434381742.webp');
}

.page-hero-performance {
  background-image: url('../images/creation_2434381748.webp');
}

.page-hero-climate {
  background-image: url('../images/creation_2434381758.webp');
}

.page-hero-policy {
  background-image: url('../images/creation_2434381772.webp');
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.page-hero p {
  margin: 0;
  opacity: 0.9;
}

.policy-content h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: var(--space-lg) 0 var(--space-sm);
}

.policy-content h2:first-child {
  margin-top: 0;
}

.policy-content p {
  margin: 0 0 var(--space-md);
}

.consent-error-msg {
  display: none;
  color: #c00;
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

.consent-group.has-error + .consent-error-msg {
  display: block;
}

.banner-block {
  width: 100%;
  margin: var(--space-lg) 0;
}

.banner-block img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.product-card-body {
  padding: var(--space-md);
}

.product-card-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 var(--space-sm);
}

.product-card-body p {
  margin: 0 0 var(--space-md);
  font-size: 0.95rem;
}

.product-price {
  font-weight: 700;
  color: var(--color-accent-orange);
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
}

.contact-form-wrap h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 var(--space-md);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-info h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 var(--space-md);
}

.contact-info p {
  margin: 0 0 var(--space-sm);
}

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

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 1rem;
}

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

.form-group .error-msg {
  color: #c00;
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.form-group.has-error .error-msg {
  display: block;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: #c00;
}

.consent-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.consent-group input {
  margin-top: 4px;
  flex-shrink: 0;
}

.consent-group label {
  font-size: 0.9rem;
}

.map-embed {
  width: 100%;
  aspect-ratio: 16/10;
  border: 0;
  border-radius: var(--radius-md);
  margin-top: var(--space-md);
}

.footer-main {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--space-lg) var(--space-md);
  margin-top: var(--space-xl);
  margin-bottom: 0;
  border-top: 3px solid var(--color-accent-orange);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  justify-content: space-between;
  align-items: center;
}

.footer-address {
  width: 100%;
  margin: 0 0 var(--space-sm);
  font-size: 0.9rem;
  color: var(--color-surface);
}

.footer-address a {
  color: var(--color-surface);
  text-decoration: underline;
}

.footer-address a:hover {
  color: var(--color-accent-orange);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-nav a {
  color: var(--color-surface);
}

.footer-nav a:hover {
  color: var(--color-accent-orange);
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--color-surface);
  margin: 0;
}

.privacy-popup {
  position: fixed;
  bottom: var(--space-md);
  left: var(--space-md);
  right: var(--space-md);
  max-width: 420px;
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1001;
  transform: translateY(120%);
  transition: transform var(--transition-mid);
}

.privacy-popup.is-visible {
  transform: translateY(0);
}

.privacy-popup p {
  margin: 0 0 var(--space-md);
  font-size: 0.9rem;
}

.privacy-popup .btn {
  margin-right: var(--space-sm);
}

.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 999;
  width: 48px;
  height: 48px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--color-accent-orange);
  color: #fff;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-mid), visibility var(--transition-mid), transform var(--transition-mid);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus {
  background: #e55f00;
  color: #fff;
}

.thankyou-content {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.thankyou-content h1 {
  font-family: var(--font-display);
  margin: 0 0 var(--space-md);
}

.err-page {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
}

.err-page h1 {
  font-family: var(--font-display);
  margin: 0 0 var(--space-md);
}

.wizard-steps {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.wizard-step {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.wizard-step.is-active {
  background: var(--color-accent-orange);
  color: #fff;
}

.wizard-label {
  font-weight: 600;
  margin: 0 0 var(--space-md);
}

.wizard-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.wizard-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border: 1px solid var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.wizard-option:hover {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.wizard-radio {
  flex-shrink: 0;
}

.wizard-option-text {
  font-size: 1rem;
}

.recommendation-box {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-top: var(--space-lg);
  border-left: 4px solid var(--color-accent-orange);
}

.cert-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.cert-badge {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
}

.durability-meter {
  height: 24px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: var(--space-md) 0;
}

.durability-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent-green), var(--color-accent-blue));
  border-radius: var(--radius-sm);
  transition: width var(--transition-mid);
}

.durability-fill-85 {
  width: 85%;
}

.tech-visual {
  margin: var(--space-lg) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tech-visual img {
  width: 100%;
  display: block;
}

@media (min-width: 1024px) {
  .nav-desktop {
    display: block;
  }

  .burger-btn {
    display: none;
  }
}

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

@media (max-width: 320px) {
  .site-header {
    padding: var(--space-sm) var(--space-md);
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}