/* ===== NAVI NAVIGATION APP - MAIN STYLES ===== */

/* CSS Custom Properties - Estilo Navi/Uber (Paleta extraída de la app Android) */
:root {
  /* Colors - Paleta Navi/Uber oficial */
  --color-primary: #000000;        /* Negro Uber/Navi - Principal */
  --color-secondary: #1FBAD3;      /* Teal Uber/Navi - Acento */
  --color-accent: #1FBAD3;         /* Teal Uber/Navi - Acento */
  --color-success: #2DD36F;        /* Verde Uber - Éxito */
  --color-warning: #FBBF24;        /* Amarillo Uber - Warning */
  --color-error: #F56565;          /* Rojo Uber - Error */
  --color-info: #1FBAD3;           /* Teal - Info */
  
  /* Light color variants for backgrounds */
  --color-primary-light: rgba(0, 0, 0, 0.05);
  --color-secondary-light: rgba(31, 186, 211, 0.1);
  --color-accent-light: rgba(31, 186, 211, 0.1);
  --color-success-light: rgba(45, 211, 111, 0.1);
  --color-warning-light: rgba(251, 191, 36, 0.1);
  --color-error-light: rgba(245, 101, 101, 0.1);
  --color-info-light: rgba(31, 186, 211, 0.1);
  
  /* Dark color variants for text */
  --color-primary-dark: #1D2129;
  --color-secondary-dark: #1AA6BC;
  --color-accent-dark: #1AA6BC;
  --color-success-dark: #26B85E;
  --color-warning-dark: #D69E00;
  --color-error-dark: #E04545;
  --color-info-dark: #1AA6BC;
  
  /* Grays - Paleta neutral Uber/Navi */
  --color-gray-50: #FAFBFC;
  --color-gray-100: #F7F8FA;
  --color-gray-200: #EEEFF4;
  --color-gray-300: #E2E5EA;
  --color-gray-400: #C7CDD6;
  --color-gray-500: #9AA0A6;
  --color-gray-600: #68727A;
  --color-gray-700: #545A61;
  --color-gray-800: #3E4347;
  --color-gray-900: #1D2129;
  
  /* Gradients - Gradiente Navi (teal → verde) */
  --gradient-primary: linear-gradient(135deg, #1FBAD3 0%, #2DD36F 100%);
  --gradient-secondary: linear-gradient(135deg, #000000 0%, #1D2129 100%);
  --gradient-hero: linear-gradient(135deg, #1FBAD3 0%, #2DD36F 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Font weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font sizes */
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */
  --font-size-6xl: 3.75rem;     /* 60px */
  
  /* Spacing */
  --spacing-xs: 0.5rem;         /* 8px */
  --spacing-sm: 1rem;           /* 16px */
  --spacing-md: 2rem;           /* 32px */
  --spacing-lg: 4rem;           /* 64px */
  --spacing-xl: 6rem;           /* 96px */
  --spacing-2xl: 8rem;          /* 128px */
  
  /* Border radius - Estilo Navi/Uber */
  --border-radius-sm: 4px;
  --border-radius: 8px;
  --border-radius-md: 12px;        /* Estándar Navi para cards */
  --border-radius-lg: 16px;
  --border-radius-xl: 24px;
  --border-radius-full: 9999px;
  
  /* Shadows - Estilo Uber (sutiles) */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.20);
  
  /* Transitions */
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* ===== RESET & BASE STYLES ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: white;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--color-secondary);
}

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.container-fluid {
  max-width: 100%;
  padding: 0 var(--spacing-sm);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.gradient-text {
  /* Gradiente teal-verde original con sombra añadida para mejor contraste */
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-weight-bold);
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3)) 
          drop-shadow(0 4px 16px rgba(0, 0, 0, 0.2));
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-lg {
  padding: var(--spacing-2xl) 0;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-primary);      /* Negro sólido Navi */
  color: white;
  box-shadow: var(--shadow);              /* Sombra sutil Uber */
}

.btn-primary:hover {
  background: var(--color-gray-900);     /* Negro más claro al hover */
  transform: translateY(-1px);           /* Lift effect sutil */
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-gray-300);  /* Borde gris Navi */
}

.btn-secondary:hover {
  background: var(--color-gray-50);      /* Fondo gris claro al hover */
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-large {
  padding: 16px 32px;
  font-size: var(--font-size-lg);
}

.btn-small {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

/* ===== HEADER - Estilo Navi/Uber ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);          /* Sombra muy sutil Uber */
  z-index: var(--z-sticky);
  transition: var(--transition);
}

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

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

.nav-brand .logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.nav-brand .tagline {
  font-size: 10px;
  font-weight: var(--font-weight-medium); /* Más peso para mejor legibilidad */
  letter-spacing: 0.02em;            /* Ligeramente más espaciado para legibilidad */
  /* Gradiente teal-verde con sombra para contraste */
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-sm); /* Reducido de --spacing-md para dar más espacio */
  margin: 0;
  padding: 0;
}

.nav-menu a {
  color: var(--color-gray-700);
  font-weight: var(--font-weight-medium);
  padding: 8px 12px; /* Reducido padding horizontal */
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
  white-space: nowrap; /* Evita que el texto se rompa en múltiples líneas */
  font-size: var(--font-size-sm); /* Asegurar que el font no sea demasiado grande */
}

.nav-menu a:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  cursor: pointer;
  color: var(--color-gray-700);
}

/* ===== HERO SECTION ===== */
.hero {
  background: var(--gradient-hero);
  color: white;
  padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="white" stroke-width="0.5" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-text h1 {
  font-size: var(--font-size-6xl);
  margin-bottom: var(--spacing-sm);
  color: white;
}

.hero-text .hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

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

/* Picture element responsive */
.hero-visual picture {
  display: block;
  width: 100%;
  max-width: 100%;
}

.hero-mockup {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  max-height: 600px;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
  border-radius: var(--border-radius-xl);
  transition: var(--transition);
  object-fit: contain;
  /* Performance improvements */
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.hero-mockup:hover {
  transform: translateY(-5px);
  filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.4));
}

/* ===== CARDS - Estilo Navi/Uber ===== */
.card {
  background: white;
  border-radius: var(--border-radius-md);  /* 12px - Estándar Navi */
  padding: 20px;                           /* Padding generoso Uber */
  box-shadow: var(--shadow);               /* Sombra sutil */
  transition: var(--transition);
  border: none;                            /* Sin border, solo sombra */
}

.card:hover {
  transform: translateY(-2px);             /* Lift effect sutil */
  box-shadow: var(--shadow-md);            /* Sombra incrementada */
}

.card-header {
  margin-bottom: var(--spacing-sm);
}

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

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xs);
}

.card-description {
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* ===== GRID LAYOUTS ===== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ===== SPECIFIC STYLES FOR HOW IT WORKS SECTION ===== */
.step-circle {
  width: 80px;
  height: 80px;
  min-width: 80px;
  min-height: 80px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-weight-bold);
  font-size: 2rem;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
  }
  
  /* Touch targets for navigation */
  .nav-menu a {
    min-height: 44px;
    padding: 12px 16px;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    gap: 0;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-md);
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  /* Touch targets and button improvements */
  .btn {
    width: 100%;
    justify-content: center;
    min-height: 44px;
    padding: 12px 20px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .nav-brand .tagline {
    display: none;
  }
  
  .hero-text h1 {
    font-size: clamp(1.75rem, 5vw, 3rem);
  }
  
  .hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
  }
}

/* Mobile small - Extra optimizations */
@media (max-width: 480px) {
  .hero-mockup {
    max-height: 300px;
    border-radius: var(--border-radius-md);
  }
  
  .hero-visual {
    padding: 0;
  }
}

/* ===== ECONOMIC IMPACT SECTION - TABS FOR MOBILE ===== */

.economic-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.comparison-card {
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem;
  border-radius: 1rem;
  backdrop-filter: blur(10px);
}

.comparison-title {
  color: white;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.comparison-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.comparison-list li {
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.math-comparison {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  text-align: center;
  margin-top: 3rem;
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem;
  border-radius: 1rem;
}

.math-box {
  flex: 1;
  min-width: 200px;
}

.math-vs {
  font-size: 2rem;
  font-weight: bold;
}

/* Tabs for mobile (Economic Impact) */
.impact-tabs {
  display: none; /* Hidden on desktop */
}

.tab-buttons {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.impact-tab {
  flex: 1;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 44px;
  font-size: 1rem;
}

.impact-tab:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.5);
}

.impact-tab.active,
.impact-tab[aria-selected="true"] {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.impact-panel {
  display: none;
}

.impact-panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* Responsive: Mobile tabs */
@media (max-width: 768px) {
  .economic-comparison {
    display: none; /* Hide desktop 2-column layout */
  }
  
  .impact-tabs {
    display: block; /* Show tabs on mobile */
  }
  
  .math-comparison {
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
  }
  
  .math-vs {
    font-size: 1.5rem;
  }
  
  .math-box {
    min-width: 100%;
  }
}

@media (max-width: 480px) {
  .comparison-card {
    padding: 1.5rem;
  }
  
  .comparison-title {
    font-size: 1.25rem;
  }
  
  .comparison-list li {
    font-size: 0.9rem;
  }
}

/* ===== IMAGES RESPONSIVE ===== */

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

/* Hero mockup responsive improvements are in the media queries below */

/* ===== CARDS WITH MAX HEIGHT + SCROLL ===== */

.card ul {
  list-style: none;
  padding-left: 0;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .card.feature ul {
    max-height: 180px;
    overflow-y: auto;
    padding-right: 0.5rem;
  }
  
  /* Custom scrollbar for better UX */
  .card.feature ul::-webkit-scrollbar {
    width: 4px;
  }
  
  .card.feature ul::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: 4px;
  }
  
  .card.feature ul::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: 4px;
  }
  
  .card.feature ul::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
  }
}