/* ========================================
   VARIABLES CSS Y CONFIGURACIÓN GLOBAL
======================================== */
:root {
  /* Colores principales */
  --primary-color: #10b981;
  --primary-dark: #059669;
  --secondary-color: #f59e0b;
  --accent-color: #8b5cf6;

  /* Colores de fondo */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;

  /* Colores de texto */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;

  /* Gradientes */
  --gradient-primary: linear-gradient(
    135deg,
    var(--primary-color),
    var(--accent-color)
  );
  --gradient-secondary: linear-gradient(
    135deg,
    var(--secondary-color),
    #ef4444
  );
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* Sombras */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Tipografía */
  --font-primary: "Poppins", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Inter", serif;

  /* Tamaños de fuente responsivos con clamp() */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3rem);
  --text-5xl: clamp(3rem, 2.5rem + 2.5vw, 4rem);

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

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ========================================
   MODO OSCURO CON PREFERS-COLOR-SCHEME
======================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
  }
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal),
    color var(--transition-normal);
  overflow-x: hidden;
}

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

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

/* Truncar texto con ellipsis */
.truncate-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Aspect ratio fijo */
.aspect-ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.aspect-ratio-1-1 {
  aspect-ratio: 1 / 1;
}

/* Botones principales */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: var(--text-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  justify-content: center;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* ========================================
   FOOTER
======================================== */
.footer {
  background: var(--bg-tertiary);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-brand {
  max-width: 400px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

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

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

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  border-radius: 50%;
  text-decoration: none;
  font-size: var(--text-lg);
  transition: all var(--transition-normal);
}

.social-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-xl);
}

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

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

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

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

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

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

.footer-bottom p {
  margin-bottom: var(--spacing-xs);
}

/* ========================================
   BOTÓN FLOTANTE ANIMADO
======================================== */
.floating-btn {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: var(--z-fixed);
  background: var(--gradient-secondary);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-xl);
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  animation: pulse 2s infinite;
}

.floating-btn:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: var(--shadow-xl);
  animation: none;
}

.floating-btn-icon {
  font-size: var(--text-lg);
}

@media (max-width: 768px) {
  .floating-btn {
    bottom: 20px;
    right: 20px;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .floating-btn-text {
    display: none;
  }
}

/* ========================================
   SKELETON LOADER
======================================== */
.skeleton-loader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  opacity: 1;
  visibility: visible;
  transition: all var(--transition-slow);
}

.skeleton-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.skeleton-header {
  width: 300px;
  height: 40px;
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-content {
  width: 100%;
  max-width: 500px;
}

.skeleton-line {
  height: 20px;
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
}

.skeleton-line.short {
  width: 60%;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
  .hero-content {
    text-align: center;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 300px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .recipes-showcase {
    grid-template-columns: 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   UTILIDADES ADICIONALES
======================================== */

/* Uso de :has() para estados padres */
.form-group:has(input:focus) label {
  color: var(--primary-color);
  transform: translateY(-2px);
}

.form-group:has(input:valid) label {
  color: var(--primary-color);
}

/* Animaciones adicionales para elementos específicos */
.hero-stats .stat-item {
  animation: fadeInUp 0.6s ease-out forwards;
  opacity: 0;
  transform: translateY(30px);
}

.hero-stats .stat-item:nth-child(1) {
  animation-delay: 0.2s;
}
.hero-stats .stat-item:nth-child(2) {
  animation-delay: 0.4s;
}
.hero-stats .stat-item:nth-child(3) {
  animation-delay: 0.6s;
}

/* Efectos de hover mejorados para móvil */
@media (hover: hover) {
  .recipe-card:hover {
    transform: translateY(-10px);
  }

  .testimonial-card:hover {
    transform: translateY(-8px);
  }
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus visible para navegación por teclado */
.nav-link:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.theme-toggle:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .floating-btn,
  .scroll-to-top,
  .skeleton-loader {
    display: none !important;
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-lg) 0;
  }

  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
  }
}