:root {
  --color-arctic-white: #FFFFFF;
  --color-nordic-gray: #F4F5F7;
  --color-misty-blue: #7AA6C2;
  --color-soft-sand: #E9DCC9;
  --color-light-charcoal: #2B2B2B;
  --color-deep-charcoal: #1C1C1C;
  --color-neutral-gray: #6B7280;
  --font-primary: 'Inter', sans-serif;
  --font-heading: 'Montserrat', sans-serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-xxl: 3rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--color-deep-charcoal);
  background-color: var(--color-arctic-white);
  line-height: 1.6;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  touch-action: pan-y;
  -webkit-user-select: none;
  user-select: none;
  pointer-events: auto;
}

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

a:hover {
  color: var(--color-misty-blue);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-deep-charcoal);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-neutral-gray);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  overflow-x: hidden;
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.header-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-arctic-white);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), background-color var(--transition-base);
}

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

.header-wrapper.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

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

.brand-text {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--color-deep-charcoal);
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  align-items: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-deep-charcoal);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-misty-blue);
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

.burger-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 1001;
}

.burger-line {
  width: 25px;
  height: 2px;
  background-color: var(--color-deep-charcoal);
  transition: all var(--transition-base);
}

.burger-toggle.active .burger-line:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.burger-toggle.active .burger-line:nth-child(2) {
  opacity: 0;
}

.burger-toggle.active .burger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background-color: var(--color-arctic-white);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  transition: right var(--transition-base);
  z-index: 1000;
  padding: var(--space-xxl) var(--space-lg);
  overflow-y: auto;
}

.mobile-menu.active {
  right: 0;
}

.mobile-menu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xxl);
}

.mobile-menu-link {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-deep-charcoal);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-nordic-gray);
  display: block;
}

.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: 999;
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.hero-section {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-nordic-gray) 0%, var(--color-soft-sand) 100%);
  margin-top: 70px;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.15;
  object-fit: cover;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-xxl) var(--space-md);
  max-width: 800px;
}

.hero-title {
  color: var(--color-deep-charcoal);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-neutral-gray);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 1s ease;
}

.btn-primary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-misty-blue);
  color: var(--color-arctic-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-base);
  border: 2px solid var(--color-misty-blue);
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-misty-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background-color: transparent;
  color: var(--color-deep-charcoal);
  border: 2px solid var(--color-light-charcoal);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-base);
  cursor: pointer;
  font-size: 1rem;
}

.btn-secondary:hover {
  background-color: var(--color-light-charcoal);
  color: var(--color-arctic-white);
  transform: translateY(-2px);
}

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

.card-item {
  background-color: var(--color-arctic-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  opacity: 0;
  transform: translateY(20px);
  touch-action: pan-y;
}

.card-item.visible {
  opacity: 1;
  transform: translateY(0);
  animation: fadeInUp 0.6s ease forwards;
}

.card-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform var(--transition-slow);
  touch-action: pan-y;
  pointer-events: none;
}

.card-item:hover .card-image {
  transform: scale(1.05);
}

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

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
  color: var(--color-deep-charcoal);
}

.card-text {
  font-size: 0.95rem;
  color: var(--color-neutral-gray);
  margin-bottom: var(--space-md);
}

.price-tag {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-misty-blue);
  margin-top: var(--space-md);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.feature-box {
  text-align: center;
  padding: var(--space-xl);
  background-color: var(--color-nordic-gray);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.feature-box:hover {
  background-color: var(--color-soft-sand);
  transform: translateY(-4px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  color: var(--color-misty-blue);
}

.accordion-item {
  background-color: var(--color-arctic-white);
  border: 1px solid var(--color-nordic-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.accordion-header {
  padding: var(--space-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-nordic-gray);
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background-color: var(--color-soft-sand);
}

.accordion-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-deep-charcoal);
}

.accordion-icon {
  transition: transform var(--transition-base);
  font-size: 1.2rem;
  color: var(--color-misty-blue);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion-body {
  padding: var(--space-lg);
  color: var(--color-neutral-gray);
}

.step-guide {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.step-card {
  position: relative;
  background-color: var(--color-arctic-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.step-number {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  width: 40px;
  height: 40px;
  background-color: var(--color-misty-blue);
  color: var(--color-arctic-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  z-index: 2;
}

.step-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition-slow);
  touch-action: pan-y;
  pointer-events: none;
}

.step-card:hover .step-image {
  transform: scale(1.1);
}

.step-content {
  padding: var(--space-lg);
}

.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-top: var(--space-xl);
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  background-color: var(--color-arctic-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table th {
  background-color: var(--color-misty-blue);
  color: var(--color-arctic-white);
  padding: var(--space-lg);
  text-align: left;
  font-weight: 600;
}

.comparison-table td {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-nordic-gray);
  color: var(--color-neutral-gray);
}

.comparison-table tr:hover {
  background-color: var(--color-nordic-gray);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.material-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.material-card {
  background-color: var(--color-arctic-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.material-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  touch-action: pan-y;
  pointer-events: none;
}

.material-info {
  padding: var(--space-lg);
}

.filter-panel {
  background-color: var(--color-nordic-gray);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-xl);
}

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

.filter-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-deep-charcoal);
}

.filter-checkbox {
  margin-right: var(--space-sm);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.contact-info-section {
  margin-bottom: var(--space-lg);
}

.contact-info-title {
  font-size: 1.1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-deep-charcoal);
}

.contact-info-icon {
  color: var(--color-misty-blue);
  margin-right: var(--space-sm);
}

.contact-link {
  color: var(--color-deep-charcoal);
}

.contact-form {
  max-width: 600px;
  margin: var(--space-xl) auto;
  background-color: var(--color-nordic-gray);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
}

.contact-form-full-width {
  width: 100%;
  margin-top: var(--space-md);
}

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-deep-charcoal);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-nordic-gray);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
  background-color: var(--color-arctic-white);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-misty-blue);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

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

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

.checkbox-label {
  font-size: 0.9rem;
  color: var(--color-neutral-gray);
}

.error-message {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.error-message.show {
  display: block;
}

.map-container {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.map-iframe {
  width: 100%;
  height: 450px;
  border: 0;
  display: block;
}

.footer-wrapper {
  background-color: var(--color-light-charcoal);
  color: var(--color-arctic-white);
  padding: var(--space-xxl) 0 var(--space-lg);
  margin-top: var(--space-xxl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.footer-section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-arctic-white);
}

.footer-links {
  list-style: none;
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-sm);
  display: block;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-arctic-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.privacy-popup {
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  background-color: var(--color-arctic-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  transform: translateY(150%);
  transition: transform var(--transition-base);
}

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

.privacy-popup-content {
  margin-bottom: var(--space-md);
}

.cookie-options {
  background-color: var(--color-nordic-gray);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  margin: var(--space-md) 0;
}

.cookie-options label {
  cursor: pointer;
  user-select: none;
}

.cookie-checkbox {
  cursor: pointer;
}

.privacy-popup-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
}

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .burger-toggle {
    display: flex;
  }

  .hero-section {
    min-height: 60vh;
    margin-top: 43px;
  }

  .grid-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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

  .step-guide {
    grid-template-columns: 1fr;
  }

  .material-showcase {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    min-width: 500px;
    font-size: 0.9rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-md);
  }

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

  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
    -webkit-overflow-scrolling: touch;
    overflow-x: hidden;
  }

  body {
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
  }

  .section {
    padding: var(--space-xl) 0;
    overflow: visible;
  }

  .header-inner {
    padding: var(--space-sm) var(--space-md);
  }

  .hero-content {
    padding: var(--space-lg) var(--space-md);
  }

  .contact-form {
    padding: var(--space-lg);
  }

  .comparison-table {
    min-width: 450px;
    font-size: 0.85rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-sm) var(--space-md);
  }

  .material-showcase {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .card-item,
  .step-card,
  .material-card {
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
  }

  img {
    touch-action: pan-y;
    -webkit-user-drag: none;
  }
}