/* Variables CSS */
:root {
  /* Colores - Modo Claro */
  --primary-color: hsl(210, 85%, 25%);
  --primary-light: hsl(210, 85%, 35%);
  --accent-color: hsl(15, 75%, 55%);
  --accent-light: hsl(15, 75%, 65%);
  --background: hsl(0, 0%, 98%);
  --surface: hsl(0, 0%, 96%);
  --surface-alt: hsl(0, 0%, 94%);
  --text-primary: hsl(220, 25%, 15%);
  --text-secondary: hsl(220, 15%, 35%);
  --text-tertiary: hsl(220, 10%, 50%);
  --border: hsl(0, 0%, 88%);
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-light: rgba(0, 0, 0, 0.05);
  --white: hsl(0, 0%, 100%);
  
  /* Tipografía */
  --font-family: 'Poppins', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Bordes */
  --border-radius: 0.5rem;
  --border-radius-sm: 0.25rem;
  --border-radius-lg: 1rem;
  
  /* Transiciones */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
}

/* Modo Oscuro */
[data-theme="dark"] {
  --primary-color: hsl(210, 75%, 40%);
  --primary-light: hsl(210, 75%, 50%);
  --accent-color: hsl(15, 60%, 65%);
  --accent-light: hsl(15, 60%, 75%);
  --background: hsl(220, 25%, 15%);
  --surface: hsl(220, 22%, 18%);
  --surface-alt: hsl(220, 20%, 20%);
  --text-primary: hsl(0, 0%, 90%);
  --text-secondary: hsl(0, 0%, 70%);
  --text-tertiary: hsl(0, 0%, 50%);
  --border: hsl(220, 20%, 25%);
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-light: rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navegación */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--white);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

[data-theme="dark"] .nav {
  background: var(--surface);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

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

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 50%;
  background-color: var(--primary-color);
  transition: var(--transition);
  transform: translateX(-50%);
}

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

.theme-toggle {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--surface-alt);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
}

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

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%);
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  text-align: center;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-lg);
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.hero-search {
  position: relative;
  margin-bottom: var(--spacing-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.search-container {
  position: relative;
  display: flex;
  background: rgba(255,255,255,0.95);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm);
  backdrop-filter: blur(10px);
}

.search-input {
  flex: 1;
  border: none;
  background: none;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  outline: none;
}

.search-button {
  background: var(--primary-color);
  border: none;
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.search-button:hover {
  background: var(--primary-light);
  transform: scale(1.05);
}

.search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px var(--shadow);
  margin-top: var(--spacing-sm);
  display: none;
  z-index: 100;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* Botones */
.btn {
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--primary-color), 0.3);
}

.btn-secondary {
  background: var(--accent-color);
  color: white;
}

.btn-secondary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--accent-color), 0.3);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.2);
  border-color: white;
  transform: translateY(-2px);
}

.btn-large {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* Secciones */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background: var(--surface-alt);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Grid de Ciudades */
.cities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
}

.city-card {
  background: var(--surface);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-light);
  transition: var(--transition);
  cursor: pointer;
}

.city-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px var(--shadow);
}

.city-image-container {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.city-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.city-card:hover .city-image-container img {
  transform: scale(1.1);
}

.city-overlay {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
}

.city-businesses-count {
  background: rgba(0,0,0,0.7);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.city-content {
  padding: var(--spacing-xl);
}

.city-name {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.city-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.city-categories {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.category-tag {
  background: var(--surface-alt);
  color: var(--text-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.city-button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
}

.city-button:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

/* Grid de Categorías */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.category-item {
  background: var(--surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--border);
}

.category-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow);
  border-color: var(--primary-color);
}

.category-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

.category-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.category-count {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* Grid de Características */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-2xl);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-lg);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Sección CTA */
.section-cta {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: white;
}

.cta-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.cta-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.footer-tagline {
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-3xl);
}

.footer-section h4 {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

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

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

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

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--spacing-xl);
  text-align: center;
}

.footer-bottom p {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-3xl);
  text-align: center;
  max-width: 400px;
  width: 90%;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--surface);
    flex-direction: column;
    justify-content: flex-start;
    padding-top: var(--spacing-2xl);
    transition: var(--transition);
    border-top: 1px solid var(--border);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-buttons .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .cities-grid {
    grid-template-columns: 1fr;
  }
  
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
    gap: var(--spacing-2xl);
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-buttons .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-search {
    margin-left: var(--spacing-md);
    margin-right: var(--spacing-md);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .city-name {
    font-size: var(--font-size-xl);
  }
}