/* ====================================
   UTILIDADES Y COMPONENTES BASE
   ==================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: var(--max-width-content);
}

.container-wide {
  max-width: var(--max-width-wide);
}

/* Sección */
.section {
  padding: var(--spacing-2xl) 0;
}

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

.section-lg {
  padding: calc(var(--spacing-2xl) * 1.5) 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: 1.25rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

@media (max-width: 640px) {
  .grid { gap: 1rem; }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}
.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Text Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-uppercase { text-transform: uppercase; }
.text-sm { font-size: var(--text-sm); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-accent { color: var(--color-accent-primary); }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Spacing Utilities */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

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

.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }

.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }

/* Button Base */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2.2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-primary) 0%, #FF8A7B 100%);
  color: white;
  box-shadow: 0 4px 16px rgba(232, 93, 74, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(232, 93, 74, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-accent-primary);
  border: 2px solid var(--color-accent-primary);
  box-shadow: none;
}

.btn-secondary:hover {
  background-color: var(--color-accent-primary);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(232, 93, 74, 0.3);
}

.btn-ghost {
  background-color: var(--color-gray-100);
  color: var(--color-text-primary);
  box-shadow: none;
}

.btn-ghost:hover {
  background-color: var(--color-gray-200);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.6rem 1.6rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 1.2rem 3rem;
  font-size: var(--text-base);
}

/* Tag / Badge */
.tag {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background-color: rgba(232, 93, 74, 0.1);
  color: var(--color-accent-primary);
  transition: all var(--transition-fast);
}

.tag:hover {
  background-color: var(--color-accent-primary);
  color: white;
  transform: translateY(-2px);
}

.tag-recetas { background-color: rgba(73, 115, 90, 0.15); color: var(--color-recetas); }
.tag-restaurantes { background-color: rgba(139, 69, 19, 0.15); color: var(--color-restaurantes); }
.tag-vinos { background-color: rgba(114, 47, 55, 0.15); color: var(--color-vinos); }
.tag-chefs { background-color: rgba(195, 106, 45, 0.15); color: var(--color-chefs); }
.tag-viajes { background-color: rgba(44, 95, 124, 0.15); color: var(--color-viajes); }

/* Tags en modo oscuro con mejor contraste */
[data-theme="dark"] .tag-recetas { background-color: rgba(73, 115, 90, 0.25); }
[data-theme="dark"] .tag-restaurantes { background-color: rgba(139, 69, 19, 0.25); }
[data-theme="dark"] .tag-vinos { background-color: rgba(114, 47, 55, 0.25); }
[data-theme="dark"] .tag-chefs { background-color: rgba(195, 106, 45, 0.25); }
[data-theme="dark"] .tag-viajes { background-color: rgba(44, 95, 124, 0.25); }

/* Card Base */
.card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

.card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-image {
  transform: scale(1.05);
}

.card-content {
  padding: var(--spacing-md);
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  -o-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-transition: all var(--transition-base);
  -moz-transition: all var(--transition-base);
  -ms-transition: all var(--transition-base);
  -o-transition: all var(--transition-base);
  transition: all var(--transition-base);
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Divider */
.divider {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent-primary) 0%, var(--color-accent-tertiary) 100%);
  margin: var(--spacing-md) 0;
  border-radius: var(--radius-full);
}

.divider-center {
  margin-left: auto;
  margin-right: auto;
}

/* Aspect Ratio */
.aspect-video { aspect-ratio: 16 / 9; }
.aspect-square { aspect-ratio: 1 / 1; }
.aspect-portrait { aspect-ratio: 3 / 4; }

/* Hidden */
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Animations */
@-webkit-keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@-moz-keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@-o-keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@-webkit-keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(20px);
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    transform: translateY(0);
  }
}

@-moz-keyframes fadeInUp {
  from {
    opacity: 0;
    -moz-transform: translateY(20px);
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    -moz-transform: translateY(0);
    transform: translateY(0);
  }
}

@-o-keyframes fadeInUp {
  from {
    opacity: 0;
    -o-transform: translateY(20px);
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    -o-transform: translateY(0);
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    -webkit-transform: translateY(20px);
    -moz-transform: translateY(20px);
    -ms-transform: translateY(20px);
    -o-transform: translateY(20px);
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    -webkit-transform: translateY(0);
    -moz-transform: translateY(0);
    -ms-transform: translateY(0);
    -o-transform: translateY(0);
    transform: translateY(0);
  }
}

@-webkit-keyframes slideInRight {
  from {
    -webkit-transform: translateX(100%);
    transform: translateX(100%);
  }
  to {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }
}

@-moz-keyframes slideInRight {
  from {
    -moz-transform: translateX(100%);
    transform: translateX(100%);
  }
  to {
    -moz-transform: translateX(0);
    transform: translateX(0);
  }
}

@-o-keyframes slideInRight {
  from {
    -o-transform: translateX(100%);
    transform: translateX(100%);
  }
  to {
    -o-transform: translateX(0);
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    -webkit-transform: translateX(100%);
    -moz-transform: translateX(100%);
    -ms-transform: translateX(100%);
    -o-transform: translateX(100%);
    transform: translateX(100%);
  }
  to {
    -webkit-transform: translateX(0);
    -moz-transform: translateX(0);
    -ms-transform: translateX(0);
    -o-transform: translateX(0);
    transform: translateX(0);
  }
}

@-webkit-keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@-moz-keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@-o-keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fade-in {
  -webkit-animation: fadeIn var(--transition-base) ease;
  -moz-animation: fadeIn var(--transition-base) ease;
  -o-animation: fadeIn var(--transition-base) ease;
  animation: fadeIn var(--transition-base) ease;
}

.fade-in-up {
  -webkit-animation: fadeInUp var(--transition-slow) ease;
  -moz-animation: fadeInUp var(--transition-slow) ease;
  -o-animation: fadeInUp var(--transition-slow) ease;
  animation: fadeInUp var(--transition-slow) ease;
}

/* Loading States */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-100) 25%,
    var(--color-gray-200) 50%,
    var(--color-gray-100) 75%
  );
  background-size: 200% 100%;
  -webkit-animation: loading 1.5s infinite;
  -moz-animation: loading 1.5s infinite;
  -o-animation: loading 1.5s infinite;
  animation: loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@-webkit-keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@-moz-keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@-o-keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Scrollbar personalizado */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-primary);
}

/* Image overlay effect */
.img-overlay {
  position: relative;
  overflow: hidden;
}

.img-overlay::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
  opacity: 0;
  -webkit-transition: opacity var(--transition-base);
  -moz-transition: opacity var(--transition-base);
  -ms-transition: opacity var(--transition-base);
  -o-transition: opacity var(--transition-base);
  transition: opacity var(--transition-base);
}

.img-overlay:hover::after {
  opacity: 1;
}

/* ====================================
   ACCESIBILIDAD - NAVEGACIÓN POR TECLADO
   ==================================== */

/* Estilos de foco visibles y atractivos */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-accent-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Foco especial para botones */
.btn:focus-visible {
  outline: 3px solid var(--color-accent-primary);
  outline-offset: 4px;
  box-shadow: 0 0 0 6px rgba(232, 93, 74, 0.2);
}

/* Foco para cards interactivos */
.article-card:focus-visible,
.author-card:focus-visible,
.category-card:focus-visible {
  outline: 3px solid var(--color-accent-primary);
  outline-offset: 4px;
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl), 0 0 0 6px rgba(232, 93, 74, 0.15);
}

/* Eliminar outline por defecto solo cuando hay foco visible */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Skip to main content para navegación por teclado */
.skip-to-main {
  position: fixed;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-accent-primary);
  color: white;
  padding: 1rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.skip-to-main:focus {
  top: var(--spacing-md);
  outline: 3px solid white;
  outline-offset: 3px;
}