:root {
  --workshop-black: #101417;
  --clean-surface: #F7F8F6;
  --graphite-metal: #252D32;
  --workshop-blue: #365C73;
  --aqua-detail: #4FA7B5;
  --steel-grey: #8B969C;
  --soft-panel: #E3E8E7;
  --warm-detail: #C88B4A;
  --warning-orange: #D56B3F;
  --muted-text: #68747A;

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  --border-radius: 4px;
  --border-thin: 1px solid var(--soft-panel);
  --border-dark: 1px solid var(--graphite-metal);
  
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--clean-surface);
  color: var(--graphite-metal);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--workshop-black);
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2rem; border-bottom: var(--border-thin); padding-bottom: var(--spacing-xs); }
h3 { font-size: 1.5rem; }
p { margin-bottom: var(--spacing-sm); color: var(--muted-text); }
a { color: var(--workshop-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--aqua-detail); }

.tech-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--steel-grey);
}

/* Layout Classes */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.section { padding: var(--spacing-xl) 0; }
.section-light { background-color: var(--clean-surface); }
.section-panel { background-color: var(--soft-panel); }
.section-dark { 
  background-color: var(--workshop-black); 
  color: var(--clean-surface); 
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark p {
  color: var(--clean-surface);
}
.section-dark .tech-text { color: var(--aqua-detail); }
.section-dark h2 { border-bottom-color: var(--graphite-metal); }

/* Header & Nav (Driver Console) */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--workshop-black);
  border-bottom: 2px solid var(--aqua-detail);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.brand-logo a {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clean-surface);
  letter-spacing: 0.05em;
}

.brand-logo span { color: var(--aqua-detail); }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.main-nav a {
  color: var(--clean-surface);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--aqua-detail);
  border-bottom-color: var(--aqua-detail);
}

.nav-cta {
  display: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background-color: var(--workshop-blue);
  color: var(--clean-surface);
}
.btn-primary:hover {
  background-color: var(--aqua-detail);
  color: var(--workshop-black);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--aqua-detail);
  color: var(--aqua-detail);
}
.btn-outline:hover {
  background-color: var(--aqua-detail);
  color: var(--workshop-black);
}

/* Mobile Menu Button */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--clean-surface);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  background-color: var(--workshop-black);
  padding: var(--spacing-xl) 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    linear-gradient(rgba(16, 20, 23, 0.9), rgba(16, 20, 23, 0.95)),
    url('data:image/svg+xml;utf8,<svg width="40" height="40" xmlns="http://www.w3.org/2000/svg"><path d="M0 0h40v40H0z" fill="none"/><circle cx="20" cy="20" r="1" fill="%23252D32"/></svg>');
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--clean-surface);
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.2rem;
  color: var(--steel-grey);
  margin-bottom: var(--spacing-md);
}

/* Interactive Vehicle Check Panel */
.interactive-panel {
  background: var(--clean-surface);
  border: 1px solid var(--graphite-metal);
  border-radius: var(--border-radius);
  margin-top: -50px;
  position: relative;
  z-index: 10;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.panel-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--soft-panel);
  background-color: var(--soft-panel);
}

.panel-controls {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--clean-surface);
  border-bottom: 1px solid var(--soft-panel);
  overflow-x: auto;
}

.panel-btn {
  background: transparent;
  border: 1px solid var(--steel-grey);
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--graphite-metal);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.panel-btn.active {
  background: var(--workshop-blue);
  color: var(--clean-surface);
  border-color: var(--workshop-blue);
}

.panel-content-area {
  padding: var(--spacing-md);
  min-height: 200px;
}

.panel-view {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

.panel-view.active {
  display: block;
}

.panel-view ul {
  list-style: none;
  margin-top: var(--spacing-sm);
}

.panel-view li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: 0.5rem;
  color: var(--muted-text);
}

.panel-view li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--aqua-detail);
}

/* Care Path System */
.path-system {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.path-stage {
  display: flex;
  background: var(--clean-surface);
  border: var(--border-thin);
  padding: var(--spacing-md);
  align-items: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.path-stage:hover {
  border-color: var(--aqua-detail);
  transform: translateX(5px);
}

.path-stage::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--aqua-detail);
  opacity: 0;
  transition: var(--transition);
}

.path-stage:hover::before { opacity: 1; }

.stage-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--soft-panel);
  font-weight: 700;
  margin-right: var(--spacing-md);
  min-width: 60px;
}

.stage-content h3 { margin-bottom: 0.2rem; }
.stage-content p { margin: 0; font-size: 0.9rem; }

/* Modules / Cards */
.module-card {
  background: var(--clean-surface);
  border: var(--border-thin);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.module-card:hover {
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  border-color: var(--steel-grey);
}

.module-icon {
  width: 40px; height: 40px;
  background-color: var(--soft-panel);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  color: var(--workshop-blue);
  font-weight: bold;
}

.module-card ul {
  margin-top: auto;
  list-style: none;
  padding-top: var(--spacing-sm);
  border-top: var(--border-thin);
}
.module-card li {
  font-size: 0.85rem;
  color: var(--muted-text);
  margin-bottom: 0.3rem;
}
.module-card li::before {
  content: '-'; margin-right: 5px; color: var(--steel-grey);
}

/* Insight Cards */
.insight-card {
  border: var(--border-thin);
  background: var(--clean-surface);
  display: flex;
  flex-direction: column;
}

.insight-meta {
  padding: var(--spacing-sm) var(--spacing-md) 0;
  font-size: 0.8rem;
}

.insight-card .content {
  padding: var(--spacing-md);
  flex-grow: 1;
}

/* FAQ Accordion */
.faq-item {
  border-bottom: var(--border-thin);
  margin-bottom: var(--spacing-xs);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: var(--spacing-sm) 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--graphite-metal);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  color: var(--aqua-detail);
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding-bottom: var(--spacing-sm);
}

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

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
  color: var(--graphite-metal);
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--steel-grey);
  border-radius: var(--border-radius);
  font-family: var(--font-main);
  background-color: var(--clean-surface);
  color: var(--graphite-metal);
}

.form-control:focus {
  outline: none;
  border-color: var(--aqua-detail);
  box-shadow: 0 0 0 2px rgba(79, 167, 181, 0.2);
}

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

.form-message {
  display: none;
  padding: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  border-radius: var(--border-radius);
  background-color: var(--soft-panel);
  border-left: 4px solid var(--aqua-detail);
}

/* Footer */
.site-footer {
  background-color: var(--workshop-black);
  color: var(--soft-panel);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid var(--graphite-metal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  color: var(--clean-surface);
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a {
  color: var(--steel-grey);
  font-size: 0.9rem;
}
.footer-col a:hover { color: var(--aqua-detail); }

.footer-bottom {
  border-top: 1px solid var(--graphite-metal);
  padding-top: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted-text);
}

.footer-legal-links a {
  color: var(--muted-text);
  margin-left: var(--spacing-sm);
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background-color: var(--graphite-metal);
  color: var(--clean-surface);
  padding: var(--spacing-md);
  z-index: 9999;
  transform: translateY(100%);
  transition: transform 0.5s ease;
  box-shadow: 0 -5px 20px rgba(0,0,0,0.2);
}

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

.cookie-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  gap: var(--spacing-md);
}

.cookie-text p { margin: 0; color: var(--soft-panel); font-size: 0.9rem; }

.cookie-buttons {
  display: flex;
  gap: var(--spacing-xs);
}

.cookie-btn {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  cursor: pointer;
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-mono);
}

.btn-accept { background: var(--aqua-detail); color: var(--workshop-black); }
.btn-reject { background: transparent; border: 1px solid var(--steel-grey); color: var(--clean-surface); }

/* Utilities & Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

:focus-visible {
  outline: 2px solid var(--aqua-detail);
  outline-offset: 2px;
}

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

/* Page Headers */
.page-header {
  background-color: var(--graphite-metal);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-bottom: 4px solid var(--aqua-detail);
}
.page-header h1 { color: var(--clean-surface); margin-bottom: 0; }
.page-header p { color: var(--soft-panel); margin-top: var(--spacing-xs); max-width: 600px; }

/* Responsive Breakpoints */
@media (max-width: 1200px) {
  /* Inherits grid-base */
}

@media (min-width: 769px) {
  .nav-cta { display: block; }
}

@media (max-width: 768px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  
  .header-inner { position: relative; }
  .mobile-menu-toggle { display: block; }
  
  .main-nav {
    position: fixed;
    top: 80px; left: 0; right: 0; bottom: 0;
    background-color: var(--workshop-black);
    padding: var(--spacing-md);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
  }
  
  .main-nav.active { transform: translateX(0); }
  
  .main-nav ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .main-nav a { font-size: 1.2rem; display: block; padding: 1rem 0; border-bottom: 1px solid var(--graphite-metal); }
  
  .hero h1 { font-size: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
  .cookie-content { flex-direction: column; align-items: flex-start; }
  .cookie-buttons { flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .section { padding: var(--spacing-md) 0; }
  .panel-controls { flex-direction: column; }
  .panel-btn { width: 100%; text-align: left; }
  .footer-bottom { flex-direction: column; gap: var(--spacing-sm); text-align: center; }
}