/* ==========================================================================
   QRCarShop.com Homepage — Design System & Styles
   Mobile-first: 375px base → 768px tablet → 1024px+ desktop
   ========================================================================== */

:root {
  /* Brand */
  --color-navy: #16283F;
  --color-orange: #E8622C;
  --color-offwhite: #FAFAF8;

  /* Neutral scale */
  --color-neutral-100: #F4F4F2;
  --color-neutral-200: #E5E5E3;
  --color-neutral-300: #C8C8C5;
  --color-neutral-400: #9A9A96;
  --color-neutral-500: #6E6E6A;
  --color-neutral-600: #52524F;
  --color-neutral-700: #3D3D3A;
  --color-neutral-800: #2A2A28;
  --color-neutral-900: #1A1A18;

  /* Semantic aliases */
  --color-text: var(--color-neutral-800);
  --color-text-muted: var(--color-neutral-500);
  --color-border: var(--color-neutral-200);
  --color-surface: var(--color-offwhite);
  --color-white: var(--color-offwhite);

  /* Typography */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  /* Layout */
  --container-max: 72rem;
  --header-height: 4rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px color-mix(in srgb, var(--color-navy) 8%, transparent);
  --shadow-md: 0 4px 12px color-mix(in srgb, var(--color-navy) 10%, transparent);
  --shadow-lg: 0 8px 24px color-mix(in srgb, var(--color-navy) 12%, transparent);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-surface);
}

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

a {
  color: var(--color-orange);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3);
  line-height: 1.25;
  color: var(--color-navy);
}

p {
  margin: 0 0 var(--space-4);
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-5);
  color: var(--color-navy);
}

/* ==========================================================================
   Icons
   ========================================================================== */

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
}

.icon svg {
  width: 100%;
  height: 100%;
}

.icon-lg {
  width: 2.5rem;
  height: 2.5rem;
}

.icon-xl {
  width: 3rem;
  height: 3rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn-primary,
.btn-secondary,
.btn-outline,
.btn-success,
.btn-search,
.btn-no-signup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-orange);
  color: var(--color-offwhite);
  border-color: var(--color-orange);
}

.btn-primary:hover {
  background-color: color-mix(in srgb, var(--color-orange) 85%, var(--color-navy));
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-neutral-300);
}

.btn-secondary:hover {
  background-color: var(--color-neutral-100);
  border-color: var(--color-navy);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn-outline:hover {
  background-color: var(--color-navy);
  color: var(--color-offwhite);
  text-decoration: none;
}

.btn-success {
  background-color: var(--color-navy);
  color: var(--color-offwhite);
  border-color: var(--color-navy);
}

.btn-success:hover {
  background-color: color-mix(in srgb, var(--color-navy) 80%, var(--color-orange));
  text-decoration: none;
}

.btn-no-signup {
  background-color: var(--color-orange);
  color: var(--color-offwhite);
  border-color: var(--color-offwhite);
  font-size: 1rem;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

.btn-no-signup:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.btn-search {
  background-color: var(--color-orange);
  color: var(--color-offwhite);
  border-color: var(--color-orange);
  font-size: 1rem;
  padding: var(--space-3) var(--space-6);
  width: 100%;
  margin-top: var(--space-3);
}

.btn-search:hover {
  background-color: color-mix(in srgb, var(--color-orange) 85%, var(--color-navy));
  text-decoration: none;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-offwhite);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-3);
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 2.25rem;
  width: auto;
}

.auth-buttons {
  display: none;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.hamburger-menu {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.hamburger-menu:hover {
  background-color: var(--color-neutral-100);
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: 1px;
  transition: transform var(--transition-base);
}

/* ==========================================================================
   Mobile Menu
   ========================================================================== */

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: color-mix(in srgb, var(--color-navy) 50%, transparent);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: min(20rem, 90vw);
  height: 100vh;
  background-color: var(--color-offwhite);
  z-index: 201;
  transform: translateX(100%);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-header h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
}

.mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-navy);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.mobile-menu-close:hover {
  background-color: var(--color-neutral-100);
}

.mobile-menu-items {
  padding: var(--space-3);
}

.mobile-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-navy);
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

.mobile-menu-item:hover {
  background-color: var(--color-neutral-100);
  text-decoration: none;
}

.mobile-menu-item .nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-orange);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: var(--space-6) 0 var(--space-7);
  background-color: var(--color-offwhite);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr;
}

.hero-content {
  display: block;
}

.hero-image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 499 / 458;
  width: 100%;
  max-width: 16rem;
  margin: 0 auto var(--space-5);
  background-color: var(--color-neutral-100);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.hero h1 {
  font-size: 1.75rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-4);
}

.hero h1 .text-line {
  display: block;
}

.hero h1 .image-line {
  display: flex;
  justify-content: center;
  margin: var(--space-2) 0;
}

.hero h1 .forsale-img {
  max-height: 3rem;
  width: auto;
  object-fit: contain;
}

.hero-subtitle {
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-orange);
  margin-bottom: var(--space-4);
}

.no-signup-cta {
  text-align: center;
  margin: var(--space-5) 0;
}

.no-signup-cta .cta-hint {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Search */
.search-container {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
}

.search-container h3 {
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-4);
  color: var(--color-navy);
}

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

.search-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-offwhite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-orange) 20%, transparent);
}

.search-hint {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  margin-bottom: 0;
}

.search-hint a {
  color: var(--color-orange);
  font-weight: 600;
}

/* ==========================================================================
   Featured Vehicles
   ========================================================================== */

.featured-vehicles {
  padding: var(--space-7) 0;
  background-color: var(--color-neutral-100);
}

.listings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.listing-card {
  background-color: var(--color-offwhite);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.listing-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.listing-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--color-neutral-200);
}

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

.image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 100%;
  min-height: 10rem;
  color: var(--color-neutral-400);
  font-size: 0.875rem;
}

.listing-content {
  padding: var(--space-4);
}

.listing-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-2);
}

.listing-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-orange);
  margin-bottom: var(--space-2);
}

.listing-location {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.listing-content .btn-outline {
  width: 100%;
}

/* ==========================================================================
   Choose Your Path
   ========================================================================== */

.choose-path-section {
  padding: var(--space-7) 0;
}

.path-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.path-card {
  background-color: var(--color-offwhite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.path-card:hover {
  box-shadow: var(--shadow-md);
}

.path-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto var(--space-4);
  background-color: color-mix(in srgb, var(--color-orange) 12%, transparent);
  border-radius: var(--radius-lg);
  color: var(--color-orange);
}

.path-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.path-card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.path-card-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
}

.path-card-actions .btn-success,
.path-card-actions .btn-outline {
  width: 100%;
  text-align: center;
}

.buyer-card {
  border-top: 3px solid var(--color-navy);
}

.seller-card {
  border-top: 3px solid var(--color-orange);
}

/* ==========================================================================
   Seller Showcase
   ========================================================================== */

.success-board {
  padding: var(--space-7) 0;
  background-color: var(--color-neutral-100);
}

.seller-showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.seller-showcase-card {
  background-color: var(--color-offwhite);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  text-align: center;
}

.seller-showcase-heading {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 0 0 var(--space-4);
  line-height: 1.4;
}

.seller-showcase-image-wrap {
  border-radius: var(--radius-md);
  overflow: hidden;
  width: 100%;
}

.seller-showcase-image-wrap--landscape {
  aspect-ratio: 2816 / 1536;
}

.seller-showcase-image-wrap--portrait {
  aspect-ratio: 912 / 1181;
  max-width: 20rem;
  margin: 0 auto;
}

.seller-showcase-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* ==========================================================================
   Resources & CTA
   ========================================================================== */

.content-section {
  padding: var(--space-7) 0;
}

.resource-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-7);
}

.resource-card {
  background-color: var(--color-offwhite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.resource-card:hover {
  box-shadow: var(--shadow-md);
}

.resource-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-4);
  background-color: color-mix(in srgb, var(--color-navy) 8%, transparent);
  border-radius: var(--radius-md);
  color: var(--color-navy);
}

.resource-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-3);
}

.resource-description {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: var(--space-4);
}

.cta-section {
  background-color: var(--color-navy);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  color: var(--color-offwhite);
}

.cta-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-offwhite);
  margin-bottom: var(--space-3);
}

.cta-subtitle {
  color: color-mix(in srgb, var(--color-offwhite) 75%, transparent);
  margin-bottom: 0;
}

.cta-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

.cta-actions .btn-success {
  font-size: 1.0625rem;
  padding: var(--space-3) var(--space-5);
}

.cta-actions .btn-outline {
  font-size: 1.0625rem;
  padding: var(--space-3) var(--space-5);
  color: var(--color-offwhite);
  border-color: var(--color-offwhite);
}

.cta-actions .btn-outline:hover {
  background-color: var(--color-offwhite);
  color: var(--color-navy);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-navy);
  color: var(--color-offwhite);
  padding: var(--space-6) 0;
  margin-top: var(--space-8);
}

.site-footer .container {
  text-align: center;
}

.footer-links {
  margin-bottom: var(--space-4);
}

.footer-links a {
  color: var(--color-offwhite);
  margin: 0 var(--space-3);
  font-size: 0.9rem;
  text-decoration: none;
  opacity: 0.9;
}

.footer-links a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer-legal {
  margin-bottom: var(--space-4);
}

.footer-legal a {
  color: var(--color-offwhite);
  margin: 0 var(--space-3);
  font-size: 0.9rem;
  text-decoration: none;
  opacity: 0.85;
}

.footer-legal a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer-copy {
  margin-top: var(--space-5);
  font-size: 0.85rem;
  color: color-mix(in srgb, var(--color-offwhite) 60%, transparent);
  margin-bottom: var(--space-2);
}

.footer-tagline {
  font-size: 0.75rem;
  color: color-mix(in srgb, var(--color-offwhite) 50%, transparent);
  margin: 0;
}

/* ==========================================================================
   Tablet — 768px+
   ========================================================================== */

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-5);
  }

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

  .seller-showcase-heading {
    font-size: 1.375rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero h1 .forsale-img {
    max-height: 4rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .search-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .btn-search {
    width: auto;
    margin-top: var(--space-4);
  }

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

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

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

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

/* ==========================================================================
   Desktop — 1024px+
   ========================================================================== */

@media (min-width: 1024px) {
  .auth-buttons {
    display: flex;
  }

  .hamburger-menu {
    display: none;
  }

  .hero {
    padding: var(--space-8) 0;
  }

  .hero-inner {
    grid-template-columns: 1fr auto;
    column-gap: var(--space-7);
    align-items: start;
  }

  .hero-content {
    display: contents;
  }

  .hero h1 {
    grid-column: 1;
    grid-row: 1;
  }

  .hero-subtitle {
    grid-column: 1;
    grid-row: 2;
  }

  .hero-image-wrap {
    grid-column: 2;
    grid-row: 1 / span 4;
    width: 14rem;
    max-width: 14rem;
    margin: 0;
    align-self: start;
  }

  .no-signup-cta {
    grid-column: 1;
    grid-row: 3;
  }

  .search-container {
    grid-column: 1;
    grid-row: 4;
  }

  .hero h1 {
    font-size: 2.5rem;
    text-align: left;
  }

  .hero h1 .image-line {
    justify-content: flex-start;
  }

  .hero-subtitle {
    text-align: left;
  }

  .no-signup-cta {
    text-align: left;
  }

  .search-container h3 {
    text-align: left;
  }

  .search-form {
    text-align: left;
  }

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

  .search-grid .search-input:nth-child(4),
  .search-grid .search-input:nth-child(5) {
    grid-column: span 1;
  }

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

  .hero h1 .forsale-img {
    max-height: 4.5rem;
  }
}