/**
 * @fileoverview Estilos principales de la calculadora CFDI
 * @author Ramses Martinez
 * @version 1.0.0
 */

/* ========================================
   VARIABLES CSS (Design System)
   ======================================== */
:root {
  /* Colores principales */
  --color-primary: #2b6cb0;
  --color-primary-light: #e6eefc;
  --color-primary-dark: #1e40af;
  
  /* Colores de estado */
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  
  /* Colores neutros */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Colores de fondo */
  --bg-primary: var(--color-gray-50);
  --bg-card: var(--color-white);
  --bg-accent: var(--color-primary-light);
  
  /* Tipografía */
  --font-family-primary: 'Inter', 'Roboto', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  
  /* Tamaños de fuente */
  --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 */
  
  /* Espaciado */
  --spacing-xs: 0.25rem;      /* 4px */
  --spacing-sm: 0.5rem;       /* 8px */
  --spacing-md: 1rem;         /* 16px */
  --spacing-lg: 1.5rem;       /* 24px */
  --spacing-xl: 2rem;         /* 32px */
  --spacing-2xl: 3rem;        /* 48px */
  
  /* Bordes y sombras */
  --border-radius-sm: 0.375rem;   /* 6px */
  --border-radius-md: 0.5rem;     /* 8px */
  --border-radius-lg: 0.75rem;    /* 12px */
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Transiciones */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}

/* ========================================
   RESET Y BASE
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   LAYOUT PRINCIPAL
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* Header styles */
.header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  padding: 2rem 0;
  margin-bottom: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.header__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 0 2rem;
}

.header__logo {
  background: rgba(255, 255, 255, 0.2);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

/* Language selector styles */
.language-selector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.language-selector__label {
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0.9;
}

.language-selector__select {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: var(--border-radius-md); /* Changed from --border-radius to --border-radius-md */
  font-size: 0.875rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal); /* Changed from --transition to --transition-normal */
}

.language-selector__select:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
}

.language-selector__select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.language-selector__select option {
  background: var(--color-gray-800);
  color: white;
}

.header__content {
  padding: 0 2rem;
}

.header__content h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.header__description {
  font-size: 1.1rem;
  opacity: 0.9;
  line-height: 1.6;
  max-width: 800px;
}

/* ========================================
   COMPONENTES DE TARJETA
   ======================================== */
.card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--color-gray-200);
  transition: box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
  margin-top: 0;
}

/* ========================================
   FORMULARIOS
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background-color: var(--color-white);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.1);
}

.form-input:invalid {
  border-color: var(--color-error);
}

.form-help {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--spacing-xs);
  line-height: 1.4;
}

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

/* ========================================
   BOTONES
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-height: 40px;
}

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

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn--secondary {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px dashed var(--color-primary);
}

.btn--ghost:hover {
  background-color: var(--color-primary-light);
}

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

.btn--danger:hover {
  background-color: #dc2626;
}

.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

/* ========================================
   RESULTADOS
   ======================================== */
.results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.result-item {
  background: var(--bg-accent);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-primary-light);
  text-align: center;
}

.result-item__label {
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-item__value {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  font-family: var(--font-family-mono);
}

/* ========================================
   CHECKBOXES Y CONTROLES
   ======================================== */
.checkbox-group {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-sm);
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
}

.checkbox-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
}

/* ========================================
   LOG Y DEBUG
   ======================================== */
.log-container {
  margin-top: var(--spacing-md);
}

.log-content {
  background: var(--color-gray-900);
  color: var(--color-gray-100);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  overflow-x: auto;
  min-height: 120px;
  white-space: pre-wrap;
}

/* ========================================
   UTILIDADES
   ======================================== */
.text-muted {
  color: var(--color-gray-500);
}

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

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

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

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
  
  .header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .results {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .checkbox-group {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .card {
    padding: var(--spacing-md);
  }
  
  .results {
    grid-template-columns: 1fr;
  }
  
  .result-item {
    text-align: left;
  }
}

/* ========================================
   ANIMACIONES
   ======================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-normal) ease-out;
}

/* ========================================
   ESTADOS DE CARGA
   ======================================== */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}