:root {
  /* Colors */
  --primary: #00658D;
  --primary-container: #00ADEF;
  --background: #F9F9FD;
  --surface-container-low: #F3F3F7;
  --surface-container-highest: #E2E2E6;
  --surface-container-lowest: #FFFFFF;
  --outline-variant: rgba(189, 200, 209, 0.2); /* #BDC8D1 */
  --outline: #6E7881;
  --on-primary-fixed: #001e2e;
  --text-primary: #1A1C1E;
  --text-secondary: #73777F;
  --dark-bg: #001e2e;
  
  /* Typography */
  --font-display: 'Inter', sans-serif;
  --font-body: 'Public Sans', sans-serif;

  /* Spacing (in rem) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 1.75rem; /* ~28px */
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
}

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

html {
  background-color: #0086BD;
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
  box-shadow: 0 0 50px rgba(0,0,0,0.5);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800; /* Heavy metal feel */
}

a {
  text-decoration: none;
  color: inherit;
}

/* Hard Edges Only */
.card, .btn, input, textarea {
  border-radius: 0px !important;
}

/* Typography Classes */
.display-lg {
  font-size: 3.5rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.headline-md {
  font-size: 1.75rem;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.body-lg {
  font-size: 1.0rem;
}

.label-md {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

/* Utilities */
.text-primary-color { color: var(--primary); }
.text-primary-container { color: var(--primary-container); }
.text-white { color: #ffffff; }
.bg-dark { background-color: var(--dark-bg); }

.flex-row { display: flex; align-items: center; }
.flex-col { display: flex; flex-direction: column; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
}

.btn-primary {
  background-color: var(--primary-container);
  color: var(--on-primary-fixed);
}

.btn-primary:hover {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--outline-variant);
  color: #ffffff; /* Typically primary text, but white on dark hero */
}

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

.btn-secondary.industrial {
  color: var(--primary);
  border-color: var(--outline-variant);
}

.btn-secondary.industrial:hover {
  background-color: rgba(0, 101, 141, 0.05);
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-12);
  height: 80px;
  background-color: var(--surface-container-lowest);
  position: relative;
  z-index: 100;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #1f2937, #111827);
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo-mark svg {
  width: 20px;
  fill: #fff;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-primary);
  position: relative;
  transition: color 150ms ease;
  padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-container);
}

.header-actions {
  display: flex;
  gap: var(--space-4);
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  position: relative;
  padding: var(--space-24) var(--space-12) var(--space-24) var(--space-12);
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--dark-bg);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(0, 30, 46, 0.9) 0%, rgba(0, 30, 46, 0.2) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 600px;
}

.hero-subtitle {
  color: var(--primary-container);
  margin-bottom: var(--space-4);
}

.hero-title {
  color: #ffffff;
  margin-bottom: var(--space-6);
  text-transform: uppercase;
}

.hero-title-accent {
  color: var(--primary-container);
  display: block;
}

.hero-desc {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-8);
  font-size: 1.125rem;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
}

/* Section Shared */
.section {
  padding: var(--space-24) var(--space-12);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-16);
  position: relative;
}

.section-title {
  text-transform: uppercase;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background-color: var(--primary-container);
  margin-top: var(--space-4);
}

.section-subtitle-right {
  max-width: 400px;
  text-align: right;
  color: var(--text-secondary);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.services-left {
  background-color: var(--surface-container-low);
  padding: var(--space-12);
  display: flex;
  flex-direction: column;
}

.services-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: var(--space-6);
}

.service-card {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-6);
  color: var(--primary);
}

.service-card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
}

.service-card-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: auto;
}

.service-link {
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--space-8);
}

/* Specific Cards Color Overrides */
.card-rewinding { background-color: var(--surface-container-highest); }
.card-battery { background-color: var(--dark-bg); color: #ffffff; }
.card-battery .service-card-title { color: #ffffff; }
.card-battery .service-icon { color: var(--primary-container); }
.card-warranty { 
  grid-column: span 2; 
  background-color: var(--surface-container-low); 
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

/* Stats Banner */
.stats-banner {
  background-color: var(--dark-bg);
  color: #ffffff;
  padding: var(--space-16) var(--space-12);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.stats-banner::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.03) 50%);
  pointer-events: none;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.stat-number {
  color: var(--primary-container);
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  color: rgba(255, 255, 255, 0.6);
}

/* Contact Section */
.contact-section {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-16);
}

.contact-form .form-group {
  margin-bottom: var(--space-8);
}

.contact-form label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--outline);
  background: transparent;
  padding: 0.5rem 0;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
  transition: border-color 150ms ease;
}

.form-control:focus {
  outline: none;
  border-bottom: 2px solid var(--primary-container);
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.info-card {
  background-color: var(--surface-container-low);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
}

.info-card-header svg {
  width: 16px;
  fill: var(--primary);
}

.hours-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  background-color: #0b1118;
  color: #fff;
  padding: var(--space-8) var(--space-12);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
}

.footer-copy {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.75rem;
}

.footer-nav {
  display: flex;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.7);
  transition: color 150ms;
}

.footer-nav a:hover {
  color: #fff;
}

.footer-social {
  display: flex;
  gap: var(--space-2);
}

.social-btn {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  transition: all 150ms;
}

.social-btn:hover {
  background-color: var(--primary);
  border-color: var(--primary);
}

/* Page Header */
.page-header {
  padding: var(--space-12) var(--space-12) 0 var(--space-12);
}

.page-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

/* Utilities */
.mb-8 { margin-bottom: var(--space-8); }
.mb-6 { margin-bottom: var(--space-6); }
.mt-6 { margin-top: var(--space-6); }
.mt-16 { margin-top: var(--space-16); }
.mt-1 { margin-top: 0.25rem; }
.p-8 { padding: var(--space-8); }
.p-12 { padding: var(--space-12); }
.p-2 { padding: 0.5rem; }
.m-0 { margin: 0; }
.flex-1 { flex: 1; }
.surface-highest { background-color: var(--surface-container-highest); }
.surface-low { background-color: var(--surface-container-low); }
.surface-lowest { background-color: var(--surface-container-lowest); }
.border-outline { border: 1px solid var(--outline-variant); }
.text-center { text-align: center; }
.bg-primary-container { background-color: var(--primary-container); }

/* Split Grid Layout (Contact) */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.border-left-heavy {
  border-left: 8px solid var(--primary);
  padding: var(--space-12);
}

.shadow-ambient {
  box-shadow: 0 20px 40px rgba(0, 30, 46, 0.08); /* Ambient Shadow from DESIGN.md */
}

/* Terminal Form */
.form-row {
  display: flex;
  gap: var(--space-6);
}

.terminal-form label {
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  display: block;
}

/* Info Panels Grid */
.info-panels-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.info-card-large {
  grid-column: span 2;
  padding: var(--space-8);
}

.info-card-small {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
}

/* Brands Banner Footer Extension */
.brands-banner {
  background-color: #0F1722;
  color: rgba(255, 255, 255, 0.4);
  padding: var(--space-6) var(--space-12);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  font-style: italic;
  border-bottom: 1px solid rgba(255,255,255,0.05); /* Slight separation from footer */
}

/* FAQ Layout */
.category-menu {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.category-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  background-color: var(--surface-container-low);
  text-transform: uppercase;
  transition: all 150ms ease;
}

.category-link:hover, .category-link.active {
  background-color: var(--primary-container);
  color: var(--on-primary-fixed);
}

.category-link svg {
  color: inherit;
}

.faq-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--outline-variant);
  padding-bottom: 0.5rem;
  margin-bottom: var(--space-6);
}

/* Accordion */
.accordion-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.accordion-item {
  background-color: var(--surface-container-low);
  padding: 1.25rem var(--space-6);
}

.accordion-item.open {
  background-color: var(--surface-container-lowest);
  border-left: 4px solid var(--primary-container);
  box-shadow: 0 4px 12px rgba(0, 30, 46, 0.05);
}

.accordion-item {
  border-bottom: 1px solid var(--outline-variant);
  cursor: pointer;
}

.accordion-title {
  padding: 1.5rem 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

.accordion-item:hover .accordion-title {
  color: var(--primary);
}

.accordion-icon {
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--outline);
}

.accordion-item.open .accordion-title {
  color: var(--primary-container);
}

.accordion-content {
  display: none;
  padding-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.accordion-item.open .accordion-content {
  display: block;
}

/* Navigation Dropdown */
.nav-item-dropdown {
  position: relative;
  display: inline-block;
  height: 100%;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: white;
  border-top: 4px solid var(--primary);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.nav-item-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  padding: 1rem 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color 150ms ease, color 150ms ease;
  border-left: 3px solid transparent;
  border-bottom: 1px solid var(--outline-variant);
}

.dropdown-link:last-child {
  border-bottom: none;
}

.dropdown-link:hover {
  background-color: var(--surface-container-lowest);
  color: var(--primary);
  border-left-color: var(--primary);
}

/* Nested Dropdown */
.nested-dropdown {
  position: relative;
}

.nested-dropdown-menu {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 200px;
  background-color: white;
  border-left: 4px solid var(--primary);
  box-shadow: 10px 10px 30px rgba(0,0,0,0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all 0.2s ease;
  z-index: 101;
  display: flex;
  flex-direction: column;
}

.nested-dropdown:hover .nested-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* =========================================================================
   RESPONSIVE DESIGN (GLOBAL)
   ========================================================================= */

/* TABLET / SMALL DESKTOP (max-width: 992px) */
@media (max-width: 992px) {
  /* Scale typography */
  .display-lg { font-size: 2.5rem; line-height: 1.1; margin-bottom: 0.5rem; }
  .headline-md { font-size: 1.5rem; }
  
  /* Sections & padding adjustments */
  .section { padding: var(--space-8) var(--space-6); }
  .hero { padding: var(--space-12) var(--space-6); min-height: 60vh; text-align: center; }
  .hero-content { margin: 0 auto; }
  .page-header { padding: var(--space-8) var(--space-6) 0 var(--space-6); }
  .page-header-flex { flex-direction: column; align-items: flex-start; gap: var(--space-6); }
  
  /* Header Nav Wrapper */
  .site-header { flex-direction: column; height: auto; padding: var(--space-4) var(--space-6); gap: var(--space-6); }
  .main-nav { flex-wrap: wrap; justify-content: center; width: 100%; gap: var(--space-4); }
  .header-actions { margin-bottom: var(--space-2); }
  
  /* Grid Col collapsing */
  .services-grid, .split-grid, .info-panels-grid, .contact-section { grid-template-columns: 1fr; gap: var(--space-8); }
  .services-right { grid-template-columns: 1fr; }
  
  /* Specific UI Blocks */
  .border-left-heavy { padding: var(--space-8); }
  .search-container { width: 100% !important; align-self: flex-start !important; }
  
  /* Stats & Brands */
  .stats-banner { grid-template-columns: 1fr 1fr; padding: var(--space-8) var(--space-6); text-align: center; }
  .stat-item { align-items: center; }
  .brands-banner { font-size: 1.25rem; flex-wrap: wrap; justify-content: center; gap: var(--space-4); text-align: center; }
  
  /* FAQ Layout Breakpoints */
  .faq-layout { flex-direction: column !important; }
  .faq-sidebar { width: 100% !important; margin-bottom: var(--space-8); }
}

/* MOBILE (max-width: 768px) */
@media (max-width: 768px) {
  /* Scale Typography */
  .display-lg { font-size: 2rem; }
  
  /* Hero Overrides */
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
  
  /* Mobile Header Nav Stacking */
  .main-nav { flex-direction: column; text-align: center; gap: 0; }
  .nav-link { border-bottom: 1px solid var(--outline-variant); width: 100%; padding: var(--space-4) 0; }
  .header-actions { flex-direction: column; width: 100%; }
  .header-actions .btn { width: 100%; justify-content: center; }
  
  /* Forms */
  .form-row { flex-direction: column; gap: var(--space-6); }
  
  /* Dropdowns on Mobile */
  .nav-item-dropdown { width: 100%; }
  .nav-item-dropdown a { width: 100%; justify-content: center; }
  .dropdown-menu { position: static; box-shadow: none; opacity: 1; visibility: visible; transform: none; display: none; margin-top: 0.5rem; background-color: var(--surface-container-low); }
  .nav-item-dropdown:hover .dropdown-menu { display: flex; }
  
  /* Single Col Grids */
  .stats-banner { grid-template-columns: 1fr; }
  .brands-banner { flex-direction: column; font-size: 1.25rem; }
  
  /* Footer Stacking */
  .site-footer { flex-direction: column; text-align: center; gap: var(--space-8); padding: var(--space-8) var(--space-6); }
  .footer-left { align-items: center; }
  .footer-nav { flex-direction: column; align-items: center; gap: var(--space-4); }
  .footer-social { justify-content: center; }
}

/* =========================================================================
   HAMBURGER MENU OVERRIDES (Mobile / Tablet)
   ========================================================================= */
@media (max-width: 992px) {
  .hamburger-btn {
    display: block !important;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    position: absolute;
    right: var(--space-6);
    top: 26px; /* Centered visually with 80px logo */
    z-index: 200;
  }
  
  .main-nav, .header-actions {
    display: none !important;
    width: 100%;
  }

  .site-header.menu-open {
    padding-bottom: var(--space-6);
  }

  .site-header.menu-open .main-nav {
    display: flex !important;
    flex-direction: column;
    animation: menuFade 0.2s ease-out;
  }
  
  .site-header.menu-open .header-actions {
    display: flex !important;
    animation: menuFade 0.2s ease-out;
  }
  
  @keyframes menuFade {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
  }
}