:root {
  /* Color Palette */
  --bg-primary: #f5f7fb;
  --bg-secondary: #e9eef5;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: rgba(0, 0, 0, 0.05);
  --accent-primary: #007aff;
  --accent-secondary: #5ac8fa;
  --accent-luxury: #c7a76c;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --border-color: rgba(0, 0, 0, 0.08);

  /* Spacing & Layout */
  --container-max: 1350px;
  --spacing-desktop: 90px;
  --spacing-tablet: 60px;
  --spacing-mobile: 40px;
  --border-radius-lg: 20px;
  --border-radius-md: 12px;
  --border-radius-pill: 50px;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

ul {
  list-style: none;
}

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

/* Layout Utilities */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section-spacing {
  padding: var(--spacing-desktop) 0;
}

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

/* Glassmorphism Utilities */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
  border-radius: var(--border-radius-lg);
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3.5rem;
  line-height: 1.1;
  margin-bottom: 20px;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--border-radius-pill);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.5);
  transform: translateY(-2px);
  color: #fff;
}

.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* Header & Floating Navbar */
.site-header {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: var(--container-max);
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-pill);
  box-shadow: 0 4px 24px var(--glass-shadow);
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* Hero Section */
.hero {
  position: relative;
  padding-top: 180px;
  padding-bottom: 120px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: url('images/hero-nordic-road-luxury-car.jpg');
  background-size: cover;
  background-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(245,247,251,0.3) 0%, rgba(245,247,251,1) 100%);
  z-index: -1;
}

.hero-content {
  max-width: 700px;
  animation: fadeInUp 1s ease forwards;
}

.hero-content h1 {
  font-size: 4rem;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  margin-top: 32px;
}

/* Smart Search Bar */
.search-bar-container {
  margin-top: -60px;
  position: relative;
  z-index: 10;
}

.search-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr) auto;
  gap: 16px;
  padding: 20px;
  align-items: center;
}

.search-field {
  display: flex;
  flex-direction: column;
  padding: 0 16px;
  border-right: 1px solid var(--border-color);
}

.search-field:nth-last-child(2) {
  border-right: none;
}

.search-field label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.search-field select, .search-field input {
  border: none;
  background: transparent;
  font-size: 1rem;
  color: var(--text-primary);
  outline: none;
  font-family: var(--font-family);
}

/* Featured Cars Grid */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.car-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.car-card {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.car-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.car-image {
  position: relative;
  height: 220px;
  overflow: hidden;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.car-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.car-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  padding: 4px 12px;
  border-radius: var(--border-radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
}

.car-info {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.car-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.car-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 16px;
}

.car-specs {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
}

.spec-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
}

.spec-item span {
  font-weight: 600;
  color: var(--text-primary);
}

.car-card .btn {
  width: 100%;
  margin-top: auto;
}

/* Features / Why Us */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px 24px;
  text-align: center;
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(90,200,250,0.1), rgba(0,122,255,0.1));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.testimonial-card {
  padding: 32px;
}

.rating {
  color: var(--accent-luxury);
  margin-bottom: 16px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.author-info h4 {
  font-size: 1rem;
  margin: 0;
}

.author-info p {
  font-size: 0.85rem;
  margin: 0;
}

/* Page Headers */
.page-header {
  padding-top: 160px;
  padding-bottom: 60px;
  text-align: center;
}

/* Cars Page Specifics */
.cars-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}

.filters-sidebar {
  padding: 24px;
  align-self: start;
  position: sticky;
  top: 100px;
}

.filter-group {
  margin-bottom: 24px;
}

.filter-group h4 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.filter-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-secondary);
  cursor: pointer;
}

.filter-group input[type="checkbox"] {
  margin-right: 8px;
}

/* Car Details Page */
.car-details-layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 40px;
}

.car-gallery img {
  border-radius: var(--border-radius-lg);
  margin-bottom: 16px;
  width: 100%;
}

.gallery-thumbnails {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.car-info-sticky {
  position: sticky;
  top: 100px;
  padding: 32px;
}

.seller-card {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

/* Forms */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 16px;
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0,122,255,0.1);
}

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

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  padding: 80px 0 40px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-col h4 {
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-secondary);
}

.footer-col ul li a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .search-bar {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto;
    gap: 20px;
  }
  .search-field:nth-child(2) {
    border-right: none;
  }
  .search-bar .btn {
    grid-column: span 2;
  }
  .car-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cars-layout, .car-details-layout {
    grid-template-columns: 1fr;
  }
  .filters-sidebar, .car-info-sticky {
    position: relative;
    top: 0;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-desktop: var(--spacing-tablet);
  }
  h1 { font-size: 2.8rem; }
  h2 { font-size: 2rem; }
  
  .nav-links {
    display: none; /* Mobile menu hidden by default */
  }
  .nav-toggle {
    display: block;
  }
  .hero {
    padding-top: 140px;
    padding-bottom: 80px;
  }
  .hero-content h1 {
    font-size: 2.8rem;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-desktop: var(--spacing-mobile);
  }
  .search-bar {
    grid-template-columns: 1fr;
  }
  .search-field {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
  }
  .search-field:last-of-type {
    border-bottom: none;
  }
  .search-bar .btn {
    grid-column: span 1;
  }
  .car-grid, .testimonials-grid, .features-grid, .footer-grid {
    grid-template-columns: 1fr;
  }
  .gallery-thumbnails {
    grid-template-columns: repeat(2, 1fr);
  }
}