:root {
  /* Core */
  --c-graphite-asphalt: #202628;
  --c-deep-fleet-black: #111617;
  --c-cloud-white: #F4F7F5;
  --c-cool-porcelain: #E6ECE9;
  /* Material / Infrastructure */
  --c-steel-mist: #737F80;
  --c-charging-silver: #A8B2B0;
  --c-road-stone: #8A918E;
  --c-cool-slate: #4A5759;
  /* Accents */
  --c-electric-teal: #268487;
  --c-signal-aqua: #55B1B0;
  --c-energy-lime: #A4B94F;
  --c-copper-alert: #B46D50;

  /* Spacing */
  --sp-4: 4px;
  --sp-8: 8px;
  --sp-12: 12px;
  --sp-16: 16px;
  --sp-24: 24px;
  --sp-32: 32px;
  --sp-40: 40px;
  --sp-48: 48px;
  --sp-64: 64px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  background-color: var(--c-cloud-white);
  color: var(--c-graphite-asphalt);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  min-width: 320px;
  overflow-wrap: anywhere;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

a {
  color: var(--c-electric-teal);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--c-graphite-asphalt);
}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--c-electric-teal);
  outline-offset: 4px;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  line-height: 1.3;
  color: var(--c-deep-fleet-black);
}

h1 { 
  font-size: clamp(2rem, 5vw, 3.5rem); 
  font-weight: 700; 
  letter-spacing: -0.02em; 
  margin-bottom: var(--sp-24);
}
h2 { 
  font-size: clamp(1.5rem, 4vw, 2.25rem); 
  font-weight: 600; 
  margin-top: var(--sp-48); 
  margin-bottom: var(--sp-24);
}
h3 { 
  font-size: clamp(1.25rem, 3vw, 1.75rem); 
  font-weight: 600; 
  margin-top: var(--sp-32); 
  margin-bottom: var(--sp-16);
}
p { 
  margin-top: 0; 
  margin-bottom: var(--sp-24); 
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-32);
  min-width: 0;
}

.section {
  padding-top: var(--sp-64);
  padding-bottom: var(--sp-64);
}

.bg-dark {
  background-color: var(--c-graphite-asphalt);
  color: var(--c-cloud-white);
}

.bg-dark h1, .bg-dark h2, .bg-dark h3 {
  color: var(--c-cloud-white);
}

/* Header */
.site-header {
  height: 72px;
  background-color: var(--c-cloud-white);
  border-bottom: 1px solid var(--c-cool-porcelain);
  position: relative;
  z-index: 100;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-12);
  font-weight: 700;
  color: var(--c-deep-fleet-black);
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.brand svg {
  width: 24px;
  height: 24px;
  fill: var(--c-electric-teal);
}

/* Desktop Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 32px);
}

.nav-links {
  display: flex;
  gap: clamp(12px, 1.5vw, 24px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--c-cool-slate);
  font-weight: 500;
  font-size: clamp(0.875rem, 1.2vw, 0.9375rem);
  padding: var(--sp-8) 0;
  white-space: nowrap;
}

.nav-links a:hover, .nav-links a[aria-current="page"] {
  color: var(--c-electric-teal);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background-color: var(--c-electric-teal);
  color: var(--c-cloud-white) !important;
  border-radius: 4px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  text-align: center;
  white-space: nowrap;
}

.btn:hover {
  background-color: var(--c-signal-aqua);
}

.btn-secondary {
  background-color: var(--c-cool-porcelain);
  color: var(--c-deep-fleet-black) !important;
}

.btn-secondary:hover {
  background-color: var(--c-charging-silver);
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-12);
}

.menu-toggle-icon {
  width: 24px;
  height: 2px;
  background-color: var(--c-graphite-asphalt);
  position: relative;
  transition: background-color 0.2s;
}

.menu-toggle-icon::before, .menu-toggle-icon::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--c-graphite-asphalt);
  left: 0;
  transition: transform 0.2s;
}

.menu-toggle-icon::before { top: -6px; }
.menu-toggle-icon::after { bottom: -6px; }

.is-menu-open .menu-toggle-icon { background-color: transparent; }
.is-menu-open .menu-toggle-icon::before { transform: translateY(6px) rotate(45deg); }
.is-menu-open .menu-toggle-icon::after { transform: translateY(-6px) rotate(-45deg); }

/* Hero Section */
.hero {
  padding: var(--sp-64) 0;
  background: linear-gradient(to bottom, var(--c-cloud-white), var(--c-cool-porcelain));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-64);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
}

.hero-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-steel-mist);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--sp-8);
}

.hero-actions {
  display: flex;
  gap: var(--sp-16);
  margin-top: var(--sp-24);
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: var(--sp-40);
  padding-top: var(--sp-32);
  border-top: 1px solid var(--c-charging-silver);
  display: flex;
  gap: var(--sp-32);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  flex-direction: column;
}

.meta-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-electric-teal);
}

.meta-label {
  font-size: 0.875rem;
  color: var(--c-cool-slate);
}

.hero-visual {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
}

/* Glass Card System - Strict Separation */
.glass-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--sp-40);
  margin-top: var(--sp-48);
}

.glass-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.glass-image-area {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--c-cool-porcelain);
  aspect-ratio: 4/3;
}

.glass-image-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.glass-gap {
  height: var(--sp-32);
  width: 100%;
}

.glass-content-panel {
  flex: 1;
  background-color: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(168, 178, 176, 0.4);
  border-radius: 12px;
  padding: var(--sp-32);
  box-shadow: 0 8px 32px rgba(17, 22, 23, 0.05);
  display: flex;
  flex-direction: column;
}

.card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--c-steel-mist);
  margin-bottom: var(--sp-12);
  letter-spacing: 0.05em;
}

.glass-content-panel h3 {
  margin-top: 0;
  margin-bottom: var(--sp-12);
  font-size: 1.25rem;
}

.glass-content-panel p {
  color: var(--c-cool-slate);
  margin-bottom: var(--sp-24);
  flex: 1;
}

.card-cta {
  font-weight: 600;
  color: var(--c-electric-teal);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-8);
  padding: var(--sp-8) 0;
}

.card-cta::after {
  content: "→";
  transition: transform 0.2s ease;
}

.glass-card:hover .card-cta::after {
  transform: translateX(6px);
}

/* Content Pages */
.content-page {
  padding: var(--sp-64) var(--sp-32);
  max-width: 864px;
}

.editorial-intro {
  font-size: 1.25rem;
  color: var(--c-cool-slate);
  margin-bottom: var(--sp-48);
  line-height: 1.8;
}

.content-page img {
  border-radius: 12px;
  margin: var(--sp-48) 0;
  width: 100%;
  height: auto;
}

.content-block {
  margin-bottom: var(--sp-48);
}

.content-block ul {
  padding-left: var(--sp-24);
  margin-bottom: var(--sp-32);
}

.content-block li {
  margin-bottom: var(--sp-12);
  color: var(--c-graphite-asphalt);
  padding-left: var(--sp-8);
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-40);
  background: var(--c-cool-porcelain);
  padding: var(--sp-48);
  border-radius: 12px;
  margin: var(--sp-48) 0;
}

.pros-cons h4 {
  margin-top: 0;
  margin-bottom: var(--sp-16);
  color: var(--c-deep-fleet-black);
}

.related-guides {
  margin-top: var(--sp-64);
  padding-top: var(--sp-48);
  border-top: 1px solid var(--c-charging-silver);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
}

.related-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-24);
  background: var(--c-cloud-white);
  border: 1px solid var(--c-cool-porcelain);
  border-radius: 8px;
  font-weight: 500;
  color: var(--c-graphite-asphalt);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.related-link:hover {
  border-color: var(--c-electric-teal);
  box-shadow: 0 4px 12px rgba(38, 132, 135, 0.1);
  color: var(--c-deep-fleet-black);
}

/* Forms */
.form-group {
  margin-bottom: var(--sp-32);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--sp-12);
  color: var(--c-deep-fleet-black);
}

.form-control {
  width: 100%;
  padding: 14px 20px;
  border: 1px solid var(--c-charging-silver);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  background-color: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--c-electric-teal);
  box-shadow: 0 0 0 4px rgba(38, 132, 135, 0.15);
}

.form-error-msg {
  display: none;
  color: var(--c-copper-alert);
  font-size: 0.875rem;
  margin-top: var(--sp-8);
}

.is-invalid .form-control {
  border-color: var(--c-copper-alert);
}

.is-invalid .form-error-msg {
  display: block;
}

.form-state-msg {
  display: none;
  padding: var(--sp-24);
  border-radius: 8px;
  margin-bottom: var(--sp-32);
  font-weight: 500;
}

.is-success {
  display: block;
  background-color: rgba(164, 185, 79, 0.2);
  color: #5d6b2c;
  border: 1px solid var(--c-energy-lime);
}

/* Contact Layout */
.contact-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--sp-64);
}

.location-card {
  background-color: var(--c-cool-porcelain);
  padding: var(--sp-40);
  border-radius: 12px;
}

.location-item {
  margin-bottom: var(--sp-32);
}

.location-item:last-child {
  margin-bottom: 0;
}

.location-item h4 {
  margin-bottom: var(--sp-8);
  color: var(--c-cool-slate);
  font-size: 0.875rem;
  text-transform: uppercase;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--c-graphite-asphalt);
  color: var(--c-cloud-white);
  padding: var(--sp-32) var(--sp-24);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
  transform: translateY(100%);
  transition: transform 0.4s ease-in-out;
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-content p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--c-cool-porcelain);
}

.cookie-actions {
  display: flex;
  gap: var(--sp-16);
  flex-wrap: wrap;
  margin-top: var(--sp-16);
}

.btn-cookie {
  padding: 10px 20px;
  font-size: 0.875rem;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.btn-cookie.primary {
  background-color: var(--c-electric-teal);
  color: var(--c-cloud-white);
}

.btn-cookie.primary:hover {
  background-color: var(--c-signal-aqua);
}

.btn-cookie.secondary {
  background-color: var(--c-cool-slate);
  color: var(--c-cloud-white);
}

.btn-cookie.secondary:hover {
  background-color: var(--c-steel-mist);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--sp-32) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th, td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-charging-silver);
}

th {
  background-color: var(--c-cool-porcelain);
  font-weight: 600;
  color: var(--c-deep-fleet-black);
}

/* Footer */
.site-footer {
  background-color: var(--c-deep-fleet-black);
  color: var(--c-steel-mist);
  padding: var(--sp-64) 0 var(--sp-48);
  margin-top: auto;
  border-top: 4px solid var(--c-electric-teal);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-48);
  margin-bottom: var(--sp-48);
}

.footer-brand {
  flex: 1 1 300px;
  max-width: 400px;
}

.footer-logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-12);
  color: var(--c-cloud-white);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  margin-bottom: var(--sp-16);
  transition: opacity 0.2s ease;
}

.footer-logo-link:hover {
  color: var(--c-cloud-white);
  opacity: 0.9;
}

.footer-logo-link svg {
  width: 32px;
  height: 32px;
  fill: var(--c-electric-teal);
}

.footer-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--c-charging-silver);
  margin-bottom: 0;
}

.footer-nav-grid {
  flex: 2 1 500px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--sp-40);
}

.footer-col h4 {
  color: var(--c-cloud-white);
  margin-bottom: var(--sp-24);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
}

.footer-links a {
  color: var(--c-steel-mist);
  font-size: 0.9375rem;
  padding: var(--sp-4) 0;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.footer-links a:hover, .footer-links a:focus {
  color: var(--c-electric-teal);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(115, 127, 128, 0.2);
  padding-top: var(--sp-40);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--sp-32);
  font-size: 0.875rem;
  color: var(--c-road-stone);
}

.footer-legal p {
  margin: 0 0 12px 0;
}

.footer-legal p:last-child {
  margin-bottom: 0;
}

.footer-legal a {
  color: var(--c-charging-silver);
  transition: color 0.2s ease;
  padding: var(--sp-4) 0;
}

.footer-legal a:hover {
  color: var(--c-electric-teal);
}

.footer-domain {
  background: rgba(255, 255, 255, 0.05);
  padding: 16px 24px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-domain .domain-link {
  font-weight: 700;
  color: var(--c-electric-teal);
  font-size: 1rem;
}

.footer-domain .domain-link:hover {
  color: var(--c-signal-aqua);
}

/* Responsive Overrides */
@media (max-width: 1024px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background-color: var(--c-cloud-white);
    padding: var(--sp-32) var(--sp-24);
    flex-direction: column;
    align-items: flex-start;
    border-bottom: 1px solid var(--c-cool-porcelain);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: var(--sp-24);
  }
  
  .nav-links a {
    display: block;
    padding: var(--sp-8) 0;
    font-size: 1rem;
    white-space: normal;
  }

  .menu-toggle {
    display: block;
  }
}

@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .container {
    padding: 0 var(--sp-24);
  }

  .content-page {
    padding: var(--sp-48) var(--sp-24);
  }
  
  .glass-card {
    margin-bottom: var(--sp-24);
  }

  .glass-content-panel {
    padding: var(--sp-24);
  }

  .pros-cons {
    grid-template-columns: 1fr;
    padding: var(--sp-32);
    gap: var(--sp-32);
  }

  .hero {
    padding: var(--sp-40) 0;
  }

  .location-card {
    padding: var(--sp-24);
  }

  .cookie-banner {
    flex-direction: column;
    padding: var(--sp-24);
  }
  
  .footer-top {
    flex-direction: column;
    gap: var(--sp-40);
  }
  
  .footer-nav-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-32);
  }
  
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-domain {
    width: 100%;
    justify-content: center;
  }
}

/* Extra small screens check */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--sp-16);
  }
  .content-page {
    padding: var(--sp-40) var(--sp-16);
  }
  .pros-cons {
    padding: var(--sp-24);
  }
  .cookie-banner {
    padding: var(--sp-24) var(--sp-16);
  }
  .location-card {
    padding: var(--sp-24) var(--sp-16);
  }
  .glass-content-panel {
    padding: var(--sp-24) var(--sp-16);
  }
  .related-link {
    padding: var(--sp-16);
  }
  .site-footer {
    padding: var(--sp-48) 0 var(--sp-32);
  }
  .footer-bottom {
    gap: var(--sp-24);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}