/* ========================================
   🎨 BILLETAXO - BASE CSS CONSOLIDADO
   Sistema de diseño unificado para todas las páginas
   ======================================== */

/* 🎯 VARIABLES CSS - SISTEMA DE DISEÑO */
:root {
  /* Colores principales - Fintech Moderna */
  --primary: #1E3A8A;           /* Azul principal */
  --secondary: #22D3EE;         /* Aqua */
  --accent: #FACC15;            /* Amarillo */
  --background: #F9FAFB;        /* Gris claro */
  --surface: #FFFFFF;           /* Blanco */
  --text-primary: #1F2937;      /* Gris oscuro */
  --text-secondary: #6B7280;    /* Gris medio */
  --error: #EF4444;             /* Rojo coral */
  --success: #10B981;           /* Verde */
  --warning: #F59E0B;           /* Naranja */

  /* Tipografías */
  --font-primary: 'Roboto', 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  /* Espaciados */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */

  /* Breakpoints (informativo) */
  --mobile: 480px;
  --tablet: 768px;
  --desktop: 1024px;
  --wide: 1200px;

  /* 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Bordes */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transiciones */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

/* 🏗️ RESET Y BASE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 🎯 TIPOGRAFÍAS */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

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

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

/* 🏗️ LAYOUT PRINCIPAL */
.container {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-md);
}

/* 🎯 BOTONES MODERNOS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  font-family: inherit;
  font-size: 1rem;
  gap: var(--space-sm);
}

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

.btn-primary:hover {
  background-color: #1E40AF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background-color: #0891B2;
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

/* 🎯 CARDS */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  border: 1px solid #E5E7EB;
}

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

/* 🏗️ GRID SYSTEM */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.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)); }

/* 🎨 SECCIONES PRINCIPALES */
.section {
  padding: var(--space-3xl) 0;
}

.section-hero {
  background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 50%, var(--primary) 100%);
  color: white;
  text-align: center;
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.section-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,0.05) 0%, transparent 50%);
  pointer-events: none;
}

.section-alt {
  background-color: white;
}

.section-accent {
  background-color: var(--background);
}

/* 📱 FORMS MODERNOS */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-control {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid #E5E7EB;
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  background-color: white;
}

.form-input:focus,
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 12px center;
  background-repeat: no-repeat;
  background-size: 16px;
  padding-right: 40px;
}

/* 🚨 ESTADOS DE ERROR */
.form-input.error {
  border-color: var(--error);
}

.form-error {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

/* ✅ UTILIDADES */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }

/* 🔍 ACCESIBILIDAD */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus visible para mejor accesibilidad */
.btn:focus-visible,
.form-input:focus-visible,
.form-control:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* 🎭 ANIMACIONES */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* 📱 RESPONSIVE BREAKPOINTS */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  h4 { font-size: 1.25rem; }

  .grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

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

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

  .container {
    padding: 0 var(--space-md);
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--space-lg) 0;
  }

  .section-hero {
    padding: var(--space-lg) 0;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* 📱 RESPONSIVE UTILITIES */
@media (max-width: 480px) {
  .mobile-hidden { display: none; }
  .mobile-visible { display: block; }
}

@media (min-width: 481px) {
  .mobile-only { display: none; }
}

@media (max-width: 768px) {
  .tablet-hidden { display: none; }
  .tablet-visible { display: block; }
}

@media (min-width: 769px) {
  .tablet-only { display: none; }
}

/* 🌐 LANGUAGE SWITCHER - REMOVIDO: Estilos consolidados en /assets/css/global-components.css */

/* 🎨 DARK MODE SUPPORT (preparado para futuro) */
@media (prefers-color-scheme: dark) {
  :root {
    --background: #111827;
    --surface: #1F2937;
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
  }
}