/* ============================================
   Premium Auto Sales - Responsive Stylesheet
   Mobile-First Design with Automotive Theme
   ============================================ */

/* CSS Reset & Normalize */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* CSS Custom Properties - Automotive Theme */
:root {
  /* Brand Colors - Automotive Blues & Grays */
  --color-primary-50: #e8f0fe;
  --color-primary-100: #c5dafe;
  --color-primary-200: #9ec3fd;
  --color-primary-300: #76abfc;
  --color-primary-400: #5899fb;
  --color-primary-500: #3a87fa;
  --color-primary-600: #2c6fd9;
  --color-primary-700: #1f57b8;
  --color-primary-800: #123f97;
  --color-primary-900: #0a2976;

  --color-secondary-50: #f5f7fa;
  --color-secondary-100: #e4e9f2;
  --color-secondary-200: #c9d4e8;
  --color-secondary-300: #a3b5d1;
  --color-secondary-400: #7d96ba;
  --color-secondary-500: #5777a3;
  --color-secondary-600: #455f82;
  --color-secondary-700: #334761;
  --color-secondary-800: #212f40;
  --color-secondary-900: #1a1a2e;

  --color-accent: #ff6b35;
  --color-accent-hover: #e55a2b;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  --color-white: #ffffff;
  --color-black: #000000;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Typography Scale */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 1.65rem + 1.125vw, 2.25rem);
  --font-size-4xl: clamp(2.25rem, 1.95rem + 1.5vw, 3rem);

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Spacing Scale */
  --space-xs: clamp(0.25rem, 0.2rem + 0.25vw, 0.5rem);
  --space-sm: clamp(0.5rem, 0.45rem + 0.25vw, 0.75rem);
  --space-md: clamp(1rem, 0.9rem + 0.5vw, 1.5rem);
  --space-lg: clamp(1.5rem, 1.35rem + 0.75vw, 2rem);
  --space-xl: clamp(2rem, 1.8rem + 1vw, 3rem);
  --space-2xl: clamp(3rem, 2.7rem + 1.5vw, 4rem);
  --space-3xl: clamp(4rem, 3.6rem + 2vw, 6rem);

  /* Layout */
  --container-max-width: 1280px;
  --container-padding: var(--space-md);
  --section-padding: var(--space-2xl);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Base Styles */
body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-gray-900);
  background-color: var(--color-white);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary-600);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  z-index: var(--z-tooltip);
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: var(--font-weight-semibold);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-secondary-900);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Header */
header {
  background-color: var(--color-secondary-900);
  color: var(--color-white);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.logo h1 {
  font-size: var(--font-size-xl);
  color: var(--color-white);
  margin: 0;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.5px;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

nav a {
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  font-weight: var(--font-weight-medium);
  display: block;
}

nav a:hover {
  background-color: var(--color-primary-600);
  text-decoration: none;
}

nav a[aria-current="page"] {
  background-color: var(--color-primary-500);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-gray-900);
}

.hero-content {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 60vh;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(26, 26, 46, 0.7) 0%,
    rgba(26, 26, 46, 0.85) 100%
  );
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--container-padding);
  gap: var(--space-lg);
}

.hero-overlay h2 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin: 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  color: var(--color-gray-100);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: 0;
  line-height: var(--line-height-relaxed);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.cta-button:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  text-decoration: none;
}

.cta-button:active {
  transform: translateY(0);
}

.cta-button:focus-visible {
  outline: 3px solid var(--color-white);
  outline-offset: 3px;
}

/* Section Container */
.section-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--section-padding) var(--container-padding);
}

section header {
  position: static;
  background: none;
  box-shadow: none;
  padding: 0;
  margin-bottom: var(--space-xl);
  text-align: center;
}

section header h2 {
  color: var(--color-secondary-900);
  margin-bottom: var(--space-sm);
}

.section-description {
  color: var(--color-gray-600);
  font-size: var(--font-size-lg);
  max-width: 700px;
  margin: 0 auto;
}

/* Services Section */
.services {
  background-color: var(--color-gray-50);
}

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

.service-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.service-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.service-card h3 {
  padding: var(--space-lg) var(--space-lg) var(--space-sm);
  color: var(--color-secondary-900);
  font-size: var(--font-size-xl);
  margin: 0;
}

.service-card p {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* About Section */
.about {
  background-color: var(--color-white);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.about-text {
  flex: 1;
}

.about-text header {
  text-align: left;
  margin-bottom: var(--space-lg);
}

.about-text p {
  color: var(--color-gray-700);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.stat {
  text-align: center;
  padding: var(--space-md);
  background-color: var(--color-gray-50);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-base);
}

.stat:hover {
  background-color: var(--color-primary-50);
}

.stat strong {
  display: block;
  font-size: var(--font-size-3xl);
  color: var(--color-primary-600);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-xs);
}

.stat span {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  font-weight: var(--font-weight-medium);
}

.about-image {
  flex: 1;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Contact Section */
.contact {
  background-color: var(--color-gray-50);
}

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

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

.contact-card {
  background-color: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-base);
}

.contact-card:hover {
  box-shadow: var(--shadow-lg);
}

.contact-card h3 {
  color: var(--color-secondary-900);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

.contact-card p,
.contact-card address {
  color: var(--color-gray-700);
  font-style: normal;
  line-height: var(--line-height-relaxed);
  margin: 0;
}

.contact-card a {
  color: var(--color-primary-600);
  font-weight: var(--font-weight-medium);
}

.contact-card a:hover {
  color: var(--color-primary-700);
}

.contact-card dl {
  margin: 0;
}

.contact-card dt {
  color: var(--color-gray-900);
  font-weight: var(--font-weight-semibold);
  margin-top: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.contact-card dt:first-child {
  margin-top: 0;
}

.contact-card dd {
  color: var(--color-gray-700);
  margin: 0;
  padding-left: var(--space-md);
}

.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  min-height: 400px;
}

.contact-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Footer */
footer {
  background-color: var(--color-secondary-900);
  color: var(--color-gray-300);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

.footer-section p {
  color: var(--color-gray-400);
  line-height: var(--line-height-relaxed);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--space-sm);
}

.footer-section a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--color-primary-400);
  text-decoration: none;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-700);
  padding-top: var(--space-lg);
  text-align: center;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

.footer-bottom p {
  margin-bottom: var(--space-sm);
}

.footer-bottom a {
  color: var(--color-gray-400);
  margin: 0 var(--space-xs);
}

.footer-bottom a:hover {
  color: var(--color-primary-400);
}

/* Tablet Breakpoint - 768px */
@media (min-width: 768px) {
  .header-container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  nav ul {
    justify-content: flex-end;
    gap: var(--space-md);
  }

  .hero {
    min-height: 70vh;
  }

  .hero-image {
    min-height: 70vh;
  }

  .hero-overlay h2 {
    font-size: var(--font-size-4xl);
  }

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

  .about-content {
    flex-direction: row;
    align-items: center;
  }

  .about-text {
    flex: 1.2;
  }

  .about-image {
    flex: 0.8;
  }

  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }

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

/* Desktop Breakpoint - 1024px */
@media (min-width: 1024px) {
  .hero {
    min-height: 80vh;
  }

  .hero-image {
    min-height: 80vh;
  }

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

  .service-card img {
    height: 200px;
  }

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

  .contact-grid {
    grid-template-columns: 1fr 1.5fr;
  }

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

/* Reduced Motion Support */
@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;
  }
}

/* Print Styles */
@media print {
  header,
  footer,
  nav,
  .cta-button,
  .hero-overlay {
    display: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  h1,
  h2,
  h3 {
    page-break-after: avoid;
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  a[href^="http"]:after {
    content: " (" attr(href) ")";
  }

  @page {
    margin: 2cm;
  }
}