/* CicloFácil - Design System */
:root {
  /* Colors */
  --color-mint: #20C6B7;
  --color-soft-gray: #A7B0BD;
  --color-graphite: #1A2230;
  --color-white: #FFFFFF;
  --color-accent-blue: #3AA7FF;
  
  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-xs: 0.833rem;
  --font-size-sm: 1rem;
  --font-size-md: 1.2rem;
  --font-size-lg: 1.5rem;
  --font-size-xl: 2.25rem;
  --font-size-2xl: 3.1rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --grid-columns: 12;
  --grid-gutter: 1.5rem;
  
  /* Components */
  --card-radius: 1rem;
  --card-shadow: 0 12px 28px rgba(0,0,0,.18);
  --transition-speed: 180ms;
}

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

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

body {
  font-family: var(--font-system);
  line-height: 1.6;
  color: var(--color-graphite);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* Motion Respect */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* Container & Grid */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: var(--grid-gutter);
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-graphite);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(32, 198, 183, 0.1);
  transition: all var(--transition-speed) ease;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-mint);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-graphite);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed) ease;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-mint);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-mint);
  transition: width var(--transition-speed) ease;
}

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

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-graphite);
  margin: 4px 0;
  transition: all var(--transition-speed) ease;
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }
  
  .nav.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--color-graphite) 0%, rgba(26, 34, 48, 0.9) 100%);
  color: white;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../assets/images/hero/man_urban_city_bike_commute_cycling_hero.jpg') center/cover;
  opacity: 0.3;
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, var(--font-size-2xl));
  color: white;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero p {
  font-size: var(--font-size-md);
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.9);
}

.cta-button {
  display: inline-block;
  background: var(--color-mint);
  color: white;
  padding: var(--spacing-sm) var(--spacing-xl);
  text-decoration: none;
  border-radius: var(--card-radius);
  font-weight: 600;
  transition: all var(--transition-speed) ease;
  box-shadow: var(--card-shadow);
}

.cta-button:hover {
  background: var(--color-accent-blue);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.2);
}

/* Stats Section */
.stats {
  background: var(--color-mint);
  color: white;
  padding: var(--spacing-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  text-align: center;
}

.stat-item {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-lg);
  border-radius: var(--card-radius);
  backdrop-filter: blur(10px);
}

.stat-number {
  font-size: var(--font-size-xl);
  font-weight: 800;
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* Sections */
.section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  color: var(--color-graphite);
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  color: var(--color-soft-gray);
  max-width: 600px;
  margin: 0 auto;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: white;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-speed) ease;
  position: relative;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--color-graphite);
}

.card-excerpt {
  color: var(--color-soft-gray);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.card-link {
  color: var(--color-mint);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-speed) ease;
}

.card-link:hover {
  color: var(--color-accent-blue);
}

/* Advantages Section */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.advantage-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: white;
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-speed) ease;
}

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

.advantage-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-sm);
  color: var(--color-mint);
}

.advantage-title {
  font-size: var(--font-size-md);
  margin-bottom: var(--spacing-sm);
  color: var(--color-graphite);
}

.advantage-description {
  color: var(--color-soft-gray);
  line-height: 1.6;
}

/* Categories Section */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.category-card {
  background: white;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-speed) ease;
  text-decoration: none;
  color: inherit;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.category-card .card-image {
  height: 180px;
}

.category-card .card-content {
  padding: var(--spacing-lg);
}

.category-title {
  font-size: var(--font-size-lg);
  color: var(--color-graphite);
  margin-bottom: var(--spacing-sm);
}

.category-description {
  color: var(--color-soft-gray);
  line-height: 1.6;
}

/* Reviews Section */
.reviews {
  background: var(--color-graphite);
  color: white;
}

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

.review-item {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-lg);
  border-radius: var(--card-radius);
  backdrop-filter: blur(10px);
}

.review-text {
  font-style: italic;
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.review-author {
  font-weight: 600;
  color: var(--color-mint);
}

/* Newsletter Section */
.newsletter {
  background: linear-gradient(135deg, var(--color-mint) 0%, var(--color-accent-blue) 100%);
  color: white;
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.newsletter-form {
  display: flex;
  max-width: 400px;
  margin: var(--spacing-lg) auto 0;
  gap: var(--spacing-sm);
}

.newsletter-input {
  flex: 1;
  padding: var(--spacing-sm);
  border: none;
  border-radius: var(--card-radius);
  font-size: var(--font-size-sm);
}

.newsletter-button {
  background: var(--color-graphite);
  color: white;
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--card-radius);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
}

.newsletter-button:hover {
  background: var(--color-white);
  color: var(--color-graphite);
}

/* Footer */
.footer {
  background: var(--color-graphite);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.footer-section h3 {
  color: var(--color-mint);
  margin-bottom: var(--spacing-md);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  line-height: 1.6;
}

.footer-section a:hover {
  color: var(--color-mint);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* Scroll Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--color-mint);
  color: white;
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-speed) ease;
  opacity: 0;
  visibility: hidden;
  z-index: 1000;
}

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

.back-to-top:hover {
  background: var(--color-accent-blue);
  transform: translateY(-2px);
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--color-graphite) 0%, rgba(26, 34, 48, 0.9) 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.page-title {
  color: white;
  font-size: clamp(1.5rem, 4vw, var(--font-size-2xl));
  margin-bottom: var(--spacing-sm);
}

.breadcrumb {
  color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a {
  color: var(--color-mint);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero {
    min-height: 70vh;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* Focus States for Accessibility */
button:focus,
input:focus,
textarea:focus,
a:focus {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .header,
  .back-to-top,
  .newsletter {
    display: none;
  }
  
  .section {
    page-break-inside: avoid;
  }
}