/* Variables CSS - Paleta de Colores PetLoc */
:root {
  /* Colores principales */
  --primary-900: #1E3A8A;
  --primary-700: #2563EB;
  --primary-500: #3B82F6;
  --primary-300: #60A5FA;
  --primary-100: #BFDBFE;
  
  /* Colores neutros */
  --gray-900: #111827;
  --gray-700: #374151;
  --gray-600: #4B5563;
  --gray-500: #6B7280;
  --gray-300: #D1D5DB;
  --gray-100: #F3F4F6;
  --white: #FFFFFF;
  
  /* Colores de estado */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* Tipografía */
  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'Poppins', sans-serif;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Bordes */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  
  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--gray-900);
  background-color: var(--white);
}

/* Navegación */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

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

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

.logo-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--gray-700);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary-700);
}

.dark-mode-toggle {
  background: none;
  border: 2px solid var(--primary-500);
  border-radius: var(--border-radius);
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--primary-500);
  cursor: pointer;
  transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
  background: var(--primary-500);
  color: var(--white);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-500) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  font-family: var(--font-secondary);
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--white);
  color: var(--primary-700);
}

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

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

.btn-secondary:hover {
  background: var(--white);
  color: var(--primary-700);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-secondary);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--gray-900);
}

.section-subtitle {
  font-size: 1.125rem;
  text-align: center;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Sección About */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-text h3 {
  font-family: var(--font-secondary);
  font-size: 1.5rem;
  color: var(--primary-700);
  margin-bottom: var(--spacing-md);
}

.about-text p {
  margin-bottom: var(--spacing-md);
  color: var(--gray-700);
}

.highlight {
  background: linear-gradient(120deg, var(--primary-100) 0%, var(--primary-100) 100%);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-500);
  margin: var(--spacing-md) 0;
}

.mockup-container {
  text-align: center;
}

.phone-mockup {
  max-width: 300px;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

/* Grid de funcionalidades */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

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

.feature-card h3 {
  font-family: var(--font-secondary);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--gray-900);
}

.feature-card p {
  color: var(--gray-600);
}

/* Paleta de colores */
.color-palette {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
  flex-wrap: wrap;
}

.color-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 600;
  font-size: 0.875rem;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
}

.color-circle:hover {
  transform: scale(1.1);
}

/* Carrusel de screenshots */
.carousel-container {
  position: relative;
  max-width: 800px;
  margin: var(--spacing-xl) auto;
}

.carousel {
  overflow: hidden;
  border-radius: var(--border-radius-lg);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-slide {
  min-width: 100%;
  text-align: center;
}

.carousel-slide img {
  max-width: 100%;
  height: 500px;
  object-fit: contain;
  border-radius: var(--border-radius);
}

.carousel-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.carousel-btn {
  background: var(--primary-500);
  color: var(--white);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
}

.carousel-btn:hover {
  background: var(--primary-700);
  transform: scale(1.1);
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-300);
  cursor: pointer;
  transition: background 0.3s ease;
}

.indicator.active {
  background: var(--primary-500);
}

/* FAQ Acordeón */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: var(--gray-50);
  border: none;
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.3s ease;
}

.faq-question:hover {
  background: var(--gray-100);
}

.faq-answer {
  padding: 0 var(--spacing-md);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: var(--spacing-md);
}

.faq-icon {
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* Footer */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
}

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

.footer-section h3 {
  font-family: var(--font-secondary);
  margin-bottom: var(--spacing-md);
  color: var(--primary-300);
}

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

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

.footer-section ul li a {
  color: var(--gray-300);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: var(--primary-300);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-500);
  color: var(--white);
  border-radius: 50%;
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: var(--primary-700);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-md);
  text-align: center;
  color: var(--gray-400);
}

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

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

.slide-up {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease;
}

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

/* Utilidades */
.text-center {
  text-align: center;
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.mt-xl {
  margin-top: var(--spacing-xl);
}

.hidden {
  display: none;
}

/* Hamburger menu para móvil */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--gray-700);
  transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Sección Funcionamiento */
.funcionamiento-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: flex-start;
  margin-top: var(--spacing-xl);
}

.steps-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.step-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.step-item:hover {
  background: var(--gray-100);
  transform: translateX(5px);
}

.step-item.active {
  background: var(--primary-100);
  border-color: var(--primary-500);
  transform: translateX(10px);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--gray-700);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.step-item.active .step-number {
  background: var(--primary-500);
  color: var(--white);
}

.step-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-xs);
}

.step-content p {
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.5;
}

.step-preview {
  display: flex;
  justify-content: center;
  align-items: center;
  position: sticky;
  top: 100px;
}

.phone-mockup {
  width: 350px;
  height: 600px;
  background: linear-gradient(145deg, #f0f0f0, #ffffff);
  border-radius: 30px;
  padding: 20px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.phone-mockup::before {
  content: '';
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 6px;
  background: var(--gray-300);
  border-radius: 3px;
}

.phone-mockup img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 20px;
  transition: all 0.5s ease;
}