:root {
  --color-primary: #7cb616;
  --color-secondary: #a2e51a;
  --color-tertiary: #e7fac0;
  --color-quaternary: #4e4e4e;
  --color-accent: #5a9c12;
  --color-white: #ffffff;
  --color-gray-light: #f6f7f8;
  --color-gray: #6a6969;
  --color-dark: #2a2a2a;
  --font-primary: 'Inter', sans-serif;
  --transition: all 0.3s ease;
}

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

body {
  font-family: var(--font-primary);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-dark);
  background: var(--color-white);
  overflow-x: hidden;
}

.navbar-fixed {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(124, 182, 22, 0.12);
  z-index: 1000;
  padding: 0.875rem 0;
  transition: var(--transition);
}

.navbar-brand img {
  height: 38px;
  width: auto;
}

.navbar-nav .nav-link {
  color: var(--color-dark);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 1.125rem;
  transition: var(--transition);
  position: relative;
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
  transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after {
  width: 70%;
}

.btn-primary-custom {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  border: none;
  padding: 0.75rem 1.875rem;
  font-weight: 600;
  border-radius: 6px;
  transition: var(--transition);
  font-size: 0.9375rem;
}

.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 182, 22, 0.3);
}

.btn-secondary-custom {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  padding: 0.75rem 1.875rem;
  font-weight: 600;
  border-radius: 6px;
  transition: var(--transition);
  font-size: 0.9375rem;
}

.btn-secondary-custom:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 9rem 0 5rem;
  background: linear-gradient(135deg, rgba(231, 250, 192, 0.25) 0%, rgba(162, 229, 26, 0.08) 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 182, 22, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content h1 {
  font-size: 3.125rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero-content .eyebrow {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 1rem;
  display: inline-block;
}

.hero-content p {
  font-size: 1.1875rem;
  color: var(--color-gray);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 24px 64px rgba(78, 78, 78, 0.15);
}

.energy-slider {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(124, 182, 22, 0.15);
}

.energy-slider h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
}

.energy-scale {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.energy-scale-item {
  flex: 1;
  padding: 0.875rem 0.5rem;
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 6px;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.energy-scale-item.grade-a {
  background: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-b {
  background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-c {
  background: linear-gradient(135deg, #f1c40f 0%, #f39c12 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-d {
  background: linear-gradient(135deg, #e67e22 0%, #d35400 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-e {
  background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-f {
  background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
  color: var(--color-white);
}

.energy-scale-item.grade-g {
  background: linear-gradient(135deg, #7f3c3c 0%, #5c2424 100%);
  color: var(--color-white);
}

.energy-scale-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.energy-hint {
  font-size: 0.875rem;
  color: var(--color-gray);
  line-height: 1.6;
  padding-top: 1rem;
  border-top: 1px solid rgba(124, 182, 22, 0.12);
}

.data-chips-section {
  padding: 4rem 0;
  background: var(--color-white);
  border-top: 1px solid rgba(124, 182, 22, 0.12);
  border-bottom: 1px solid rgba(124, 182, 22, 0.12);
}

.data-chips {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
}

.data-chip {
  flex: 1;
  padding: 1.5rem 0;
  position: relative;
}

.data-chip:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -1rem;
  top: 20%;
  height: 60%;
  width: 1px;
  background: rgba(124, 182, 22, 0.2);
}

.data-chip h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.data-chip p {
  font-size: 0.9375rem;
  color: var(--color-gray);
  margin: 0;
}

.discount-premium-section {
  padding: 6rem 0;
  background: var(--color-gray-light);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.section-text {
  font-size: 1.0625rem;
  color: var(--color-gray);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.energy-label-visual {
  position: relative;
}

.energy-label-visual img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(124, 182, 22, 0.15);
}

.energy-markers {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(124, 182, 22, 0.12);
}

.energy-marker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.energy-marker i {
  color: var(--color-primary);
  font-size: 1.25rem;
}

.energy-marker span {
  font-size: 0.9375rem;
  color: var(--color-dark);
  font-weight: 500;
}

.regulation-section {
  padding: 6rem 0;
  background: var(--color-white);
}

.regulation-timeline {
  position: relative;
  padding-left: 3rem;
}

.regulation-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.timeline-node {
  position: relative;
  margin-bottom: 3rem;
}

.timeline-node::before {
  content: '';
  position: absolute;
  left: -3.5rem;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  background: var(--color-primary);
  border-radius: 50%;
  border: 3px solid var(--color-white);
  box-shadow: 0 0 0 3px var(--color-primary);
}

.timeline-node h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 0.75rem;
}

.timeline-node p {
  font-size: 1rem;
  color: var(--color-gray);
  line-height: 1.7;
}

.regulation-disclaimer {
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: rgba(231, 250, 192, 0.3);
  border-left: 4px solid var(--color-primary);
  border-radius: 6px;
}

.regulation-disclaimer p {
  font-size: 0.875rem;
  color: var(--color-dark);
  margin: 0;
  font-weight: 500;
}

.technology-section {
  padding: 6rem 0;
  background: var(--color-gray-light);
}

.technology-panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.tech-panel {
  background: var(--color-white);
  padding: 2.5rem;
  border-top: 4px solid var(--color-primary);
  transition: var(--transition);
  position: relative;
}

.tech-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: var(--color-accent);
  transition: var(--transition);
}

.tech-panel:hover::before {
  width: 100%;
}

.tech-panel:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.tech-panel i {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  display: block;
}

.tech-panel h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.tech-panel p {
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin: 0;
}

.tech-visual {
  margin-top: 3rem;
}

.tech-visual img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
  object-fit: cover;
  max-width: 500px;
  max-height: 400px;
}

.cases-section {
  padding: 6rem 0;
  background: var(--color-white);
}

.cases-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.case-accordion .accordion-item {
  border: none;
  border-bottom: 1px solid rgba(124, 182, 22, 0.12);
  background: transparent;
}

.case-accordion .accordion-button {
  background: transparent;
  color: var(--color-dark);
  font-weight: 600;
  font-size: 1.0625rem;
  padding: 1.5rem 0;
  border: none;
  box-shadow: none;
}

.case-accordion .accordion-button:not(.collapsed) {
  color: var(--color-primary);
  background: transparent;
}

.case-accordion .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%237cb616'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.case-accordion .accordion-body {
  padding: 1rem 0 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.7;
}

.case-visual img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
  position: sticky;
  top: 100px;
}

.insights-section {
  padding: 6rem 0;
  background: var(--color-gray-light);
}

.insights-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.insights-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.insights-list li {
  display: flex;
  align-items: start;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
  color: var(--color-dark);
}

.insights-list li i {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-top: 0.25rem;
}

.insights-visual img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

.glossary-section {
  padding: 6rem 0;
  background: var(--color-white);
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.glossary-term {
  padding: 1.5rem;
  background: var(--color-gray-light);
  border-left: 3px solid var(--color-primary);
  transition: var(--transition);
}

.glossary-term:hover {
  transform: translateX(6px);
  background: rgba(231, 250, 192, 0.4);
}

.glossary-term span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
}

.faq-section {
  padding: 6rem 0;
  background: var(--color-gray-light);
}

.faq-accordion .accordion-item {
  border: none;
  background: var(--color-white);
  margin-bottom: 1rem;
  border-radius: 8px;
  overflow: hidden;
}

.faq-accordion .accordion-button {
  background: var(--color-white);
  color: var(--color-dark);
  font-weight: 600;
  font-size: 1.0625rem;
  padding: 1.5rem;
  border: none;
  box-shadow: none;
}

.faq-accordion .accordion-button:not(.collapsed) {
  color: var(--color-primary);
  background: var(--color-white);
}

.faq-accordion .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%237cb616'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.faq-accordion .accordion-body {
  padding: 1rem 1.5rem 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.7;
}

.contact-section {
  padding: 6rem 0;
  background: var(--color-white);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.contact-info p {
  font-size: 1.0625rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-topics {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.contact-topics li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
  color: var(--color-dark);
}

.contact-topics li i {
  color: var(--color-primary);
  font-size: 1.125rem;
}

.contact-details {
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: var(--color-gray-light);
  border-radius: 8px;
}

.contact-details p {
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
}

.contact-details strong {
  color: var(--color-dark);
}

.contact-form-card {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(124, 182, 22, 0.15);
}

.form-label {
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
}

.form-control {
  border: 1px solid #e0e0e0;
  padding: 0.875rem;
  font-size: 0.9375rem;
  border-radius: 6px;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 182, 22, 0.1);
}

.form-select {
  border: 1px solid #e0e0e0;
  padding: 0.875rem;
  font-size: 0.9375rem;
  border-radius: 6px;
  transition: var(--transition);
}

.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(124, 182, 22, 0.1);
}

.error-message {
  color: #e74c3c;
  font-size: 0.8125rem;
  margin-top: 0.375rem;
  display: block;
}

.footer {
  background: var(--color-quaternary);
  color: var(--color-white);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

.footer-column h4 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.cookie-banner {
  position: fixed;
  bottom: -100%;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 500px;
  background: var(--color-white);
  border-radius: 12px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2);
  padding: 2rem;
  z-index: 9999;
  transition: bottom 0.4s ease;
  border: 1px solid rgba(124, 182, 22, 0.15);
}

.cookie-banner.show {
  bottom: 2rem;
}

.cookie-banner.hide {
  bottom: -100%;
}

.cookie-banner h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 1rem;
}

.cookie-banner p {
  font-size: 0.9375rem;
  color: var(--color-gray);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.cookie-preferences {
  margin-bottom: 1.5rem;
}

.cookie-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(124, 182, 22, 0.12);
}

.cookie-option label {
  font-size: 0.9375rem;
  color: var(--color-dark);
  margin: 0;
  font-weight: 500;
}

.cookie-option input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.cookie-option input[type="checkbox"]:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.cookie-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.cookie-buttons button {
  flex: 1;
  min-width: 140px;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 991px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .technology-panels {
    grid-template-columns: 1fr;
  }

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

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

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

  .cases-content {
    grid-template-columns: 1fr;
  }

  .insights-content {
    grid-template-columns: 1fr;
  }

  .data-chips {
    flex-wrap: wrap;
  }

  .data-chip {
    flex: 1 1 calc(50% - 1rem);
  }

  .data-chip:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 767px) {
  .hero-content h1 {
    font-size: 2rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

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

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

  .data-chips {
    flex-direction: column;
  }

  .data-chip {
    flex: 1 1 100%;
  }

  .energy-scale {
    flex-wrap: wrap;
  }

  .energy-scale-item {
    flex: 1 1 calc(33.333% - 0.5rem);
  }

  .cookie-buttons {
    flex-direction: column;
  }

  .cookie-buttons button {
    width: 100%;
  }
}