/* RideSmart Canada - Urban Cycling Website */

/* === CSS Variables & Color Palette === */
:root {
  --asphalt-gray: #2F2F2F;
  --signal-blue: #3AA7FF;
  --lime: #A7F542;
  --graphite: #1A2230;
  --soft-gray: #A7B0BD;
  
  --text-primary: var(--graphite);
  --text-secondary: var(--asphalt-gray);
  --text-light: var(--soft-gray);
  
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-dark: var(--graphite);
  
  --shadow-card: 0 12px 28px rgba(0,0,0,.25);
  --shadow-hover: 0 16px 36px rgba(0,0,0,.3);
  
  --border-radius: 16px;
  --border-radius-lg: 24px;
  
  --transition-fast: 160ms ease;
  --transition-medium: 200ms ease;
  --transition-slow: 220ms ease;
  
  --max-width: 1200px;
  --gutter: 24px;
}

/* === Reset & Base Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* === Typography === */
h1 {
  font-size: clamp(2.25rem, 5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

h4 {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

p {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* === Grid System === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid {
  display: grid;
  gap: var(--gutter);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === Bike Grid Background Animation === */
.bike-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.1;
  background-image: 
    radial-gradient(circle at 1px 1px, var(--signal-blue) 1px, transparent 0);
  background-size: 60px 60px;
  animation: bike-grid-flow 20s linear infinite;
}

@keyframes bike-grid-flow {
  0% { transform: translateX(0) translateY(0); }
  100% { transform: translateX(-60px) translateY(-60px); }
}

/* === Header & Navigation === */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition-medium);
  border-bottom: 1px solid rgba(167, 176, 189, 0.2);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--signal-blue);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo svg {
  width: 32px;
  height: 32px;
}

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

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

nav a:hover,
nav a.active {
  color: var(--signal-blue);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--signal-blue);
  transition: width var(--transition-fast);
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1rem;
}

.btn-primary {
  background: var(--signal-blue);
  color: white;
}

.btn-primary:hover {
  background: #2d9df0;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--soft-gray);
}

.btn-secondary:hover {
  background: var(--soft-gray);
  color: white;
}

/* === Cards === */
.card {
  background: white;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
  border: 1px solid rgba(167, 176, 189, 0.1);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.card-text {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.5;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(167, 176, 189, 0.2);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--signal-blue);
  color: white;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge.urban { background: var(--signal-blue); }
.badge.safety { background: #ff6b6b; }
.badge.community { background: var(--lime); color: var(--graphite); }

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--graphite) 0%, var(--asphalt-gray) 100%);
  color: white;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero h1 {
  color: white;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

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

/* === Sections === */
section {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* === Stats Section === */
.stats {
  background: var(--bg-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-item {
  text-align: center;
  padding: 2rem;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--signal-blue);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-light);
  font-size: 1.1rem;
}

/* === Advantages Section === */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.advantage-item {
  display: flex;
  gap: 1rem;
  padding: 2rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  transition: var(--transition-fast);
}

.advantage-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.advantage-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  color: var(--signal-blue);
}

.advantage-content h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.advantage-content p {
  color: var(--text-light);
  margin: 0;
}

/* === Reviews Section === */
.reviews {
  background: var(--bg-secondary);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.review-item {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-card);
  position: relative;
}

.review-text {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.review-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.review-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--signal-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
}

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

.review-info p {
  margin: 0;
  color: var(--text-light);
  font-size: 0.9rem;
}

/* === Newsletter Section === */
.newsletter {
  background: linear-gradient(135deg, var(--signal-blue) 0%, #2d9df0 100%);
  color: white;
  text-align: center;
}

.newsletter-form {
  display: flex;
  gap: 1rem;
  max-width: 500px;
  margin: 2rem auto 0;
  flex-wrap: wrap;
}

.newsletter-form input {
  flex: 1;
  min-width: 250px;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
}

.newsletter-form button {
  white-space: nowrap;
}

/* === Footer === */
footer {
  background: var(--graphite);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  color: var(--signal-blue);
}

.footer-section p,
.footer-section a {
  color: var(--soft-gray);
  text-decoration: none;
  line-height: 1.8;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(167, 176, 189, 0.2);
  padding-top: 1rem;
  text-align: center;
  color: var(--soft-gray);
}

/* === Category Header === */
.category-header {
  background: linear-gradient(135deg, var(--signal-blue) 0%, #2d9df0 100%);
  color: white;
  padding: 8rem 0 4rem;
  margin-top: 80px;
  position: relative;
}

.category-description {
  max-width: 800px;
  margin: 2rem auto 0;
  font-size: 1.2rem;
  opacity: 0.9;
}

/* === Filter Chips === */
.filter-chips {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.chip {
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--soft-gray);
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 0.9rem;
}

.chip:hover,
.chip.active {
  background: var(--signal-blue);
  color: white;
  border-color: var(--signal-blue);
}

/* === Back to Top Button === */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background: var(--signal-blue);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-fast);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #2d9df0;
  transform: translateY(-2px);
}

/* === Loading Animation === */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* === Responsive Design === */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }
  
  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    box-shadow: var(--shadow-card);
    border-radius: var(--border-radius);
    margin: 0.5rem;
    padding: 1rem;
  }
  
  nav.active {
    display: block;
  }
  
  nav ul {
    flex-direction: column;
    gap: 0;
  }
  
  nav a {
    display: block;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(167, 176, 189, 0.1);
  }
  
  nav a:last-child {
    border-bottom: none;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-form input,
  .newsletter-form button {
    width: 100%;
  }
  
  .grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  section {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 16px;
  }
  
  .container {
    padding: 0 16px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .hero {
    min-height: 80vh;
  }
  
  .advantage-item,
  .card {
    padding: 1.25rem;
  }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles */
button:focus,
a:focus,
input:focus {
  outline: 2px solid var(--signal-blue);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --shadow-card: 0 12px 28px rgba(0, 0, 0, 0.8);
    --shadow-hover: 0 16px 36px rgba(0, 0, 0, 0.9);
  }
}