/* Modern CSS Design System for 4eRide */
:root {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-color: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  --success-color: #10b981;
  --border-color: #374151;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --max-width: 1200px;
}

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

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

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

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 {
  font-size: 3rem;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

h2 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  text-align: center;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* Layout Utilities */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--border-color);
}

.section-alt {
  background-color: var(--bg-secondary);
}

/* Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 4rem;
  padding: 8rem 0 6rem 0;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(99, 102, 241, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-content h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background-color: #000;
  border: 12px solid #222;
  border-radius: 40px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle at 50% 50%, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
}

.phone-screen img {
  width: 80px;
  height: 80px;
  margin-bottom: 1.5rem;
  border-radius: 20px;
}

.phone-screen h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.phone-screen p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: var(--border-radius-md);
  transition: var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-color);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  background: var(--accent-gradient);
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: white;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Steps (How it Works) */
.steps-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
}

.step-group-title {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--accent-color);
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.step-item {
  display: flex;
  gap: 1.5rem;
}

.step-number {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.step-text h4 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

/* Coverage Areas */
.coverage-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.city-badge-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.city-badge {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.city-badge::before {
  content: '📍';
}

/* Contact Info */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: var(--border-radius-md);
  height: 100%;
}

.contact-card h3 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact-icon {
  font-size: 1.5rem;
  background-color: var(--bg-tertiary);
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
  line-height: 1;
}

.contact-method h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.contact-method a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.contact-method a:hover {
  color: var(--accent-color);
}

/* Forms */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.form-control {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.875rem 1.25rem;
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Static Docs (Privacy Page Layout) */
.doc-page {
  padding: 4rem 0 8rem 0;
  max-width: 800px;
  margin: 0 auto;
}

.doc-header {
  margin-bottom: 4rem;
  text-align: center;
}

.doc-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
}

.doc-content h2 {
  font-size: 1.75rem;
  text-align: left;
  margin-top: 3rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--accent-color);
  padding-left: 1rem;
}

.doc-content h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.doc-content p, .doc-content ul {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.doc-content ul {
  padding-left: 2rem;
}

.doc-content li {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: #05070a;
  border-top: 1px solid var(--border-color);
  padding: 4rem 0;
  text-align: center;
}

.footer-logo {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  display: inline-block;
  text-decoration: none;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--text-primary);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  h1 {
    font-size: 2.5rem;
  }
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  .hero-buttons {
    justify-content: center;
  }
  .steps-container {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Can be expanded with JS, but kept static for simplicity */
  }
  .mobile-menu-btn {
    display: block;
  }
  .section {
    padding: 4rem 0;
  }
  h2 {
    font-size: 1.75rem;
  }
}