/* ==========================================================================
   ANIMATIONS
   Micro-interacciones, transiciones y animaciones con respeto por
   prefers-reduced-motion para accesibilidad
   ========================================================================== */

/* ==========================================================================
   GOLD SHIMMER EFFECT
   Efecto de brillo dorado para botones principales
   ========================================================================== */

@keyframes goldShimmer {
  0% {
    left: -100%;
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    left: 100%;
    opacity: 0;
  }
}

/* Solo aplicar shimmer si no hay preferencia de movimiento reducido */
@media (prefers-reduced-motion: no-preference) {
  .btn--gold:hover::before,
  .btn--gold:focus-visible::before {
    animation: goldShimmer 1s ease-in-out;
  }
}

/* ==========================================================================
   UNDERLINE GROW ANIMATION
   Subrayado animado para enlaces
   ========================================================================== */

.link-animated {
  background-image: linear-gradient(to right, currentColor, currentColor);
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: bottom left;
  transition: background-size var(--transition-base);
}

.link-animated:hover,
.link-animated:focus-visible {
  background-size: 100% 2px;
}

/* Para navegación */
.nav-link {
  position: relative;
  overflow: hidden;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-link--current::after {
  transform: scaleX(1);
}

/* ==========================================================================
   CARD HOVER ANIMATIONS
   Efectos de elevación y transformación para tarjetas
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .card,
  .service-card,
  .project-card,
  .gpt-card,
  .testimonial {
    transition: all var(--transition-base);
  }
  
  .card:hover,
  .service-card:hover,
  .project-card:hover,
  .gpt-card:hover,
  .testimonial:hover {
    transform: translateY(-4px);
  }
  
  .btn:hover {
    transform: translateY(-1px);
  }
  
  .btn:active {
    transform: translateY(0);
  }
}

/* Fallback para usuarios con preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  .card:hover,
  .service-card:hover,
  .project-card:hover,
  .gpt-card:hover,
  .testimonial:hover {
    transform: none;
    /* Solo cambiar el outline para indicar foco/hover */
    outline: 2px solid var(--gold);
    outline-offset: 2px;
  }
  
  .btn:hover,
  .btn:focus-visible {
    transform: none;
    outline: 3px solid var(--focus);
    outline-offset: 2px;
  }
}

/* ==========================================================================
   LOADING ANIMATIONS
   Skeleton loading y spinners
   ========================================================================== */

@keyframes skeleton {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

.skeleton {
  background: linear-gradient(90deg, var(--subtle) 25%, rgba(229, 231, 235, 0.5) 50%, var(--subtle) 75%);
  background-size: 200px 100%;
  animation: skeleton 1.5s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
    background: var(--subtle);
  }
}

/* Spinner de carga */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--subtle);
  border-top: 2px solid var(--gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border: 2px solid var(--gold);
  }
}

/* ==========================================================================
   MENU ANIMATIONS
   Animaciones para menú móvil y dropdowns
   ========================================================================== */

/* Hamburger animation */
@media (prefers-reduced-motion: no-preference) {
  .hamburger__line {
    transition: all var(--transition-base);
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger__line:nth-child(1) {
    transform: rotate(45deg) translateY(6px);
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger__line:nth-child(2) {
    opacity: 0;
    transform: scale(0);
  }
  
  .mobile-menu-toggle[aria-expanded="true"] .hamburger__line:nth-child(3) {
    transform: rotate(-45deg) translateY(-6px);
  }
}

/* Menú slide-in animation */
.navbar__menu {
  transition: transform var(--transition-base);
}

@media (prefers-reduced-motion: reduce) {
  .navbar__menu {
    transition: none;
  }
  
  .navbar__menu.is-open {
    transform: translateX(0);
  }
}

/* Dropdown fade-in */
.lang-menu {
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  pointer-events: none;
}

.lang-menu:not([hidden]) {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

@media (prefers-reduced-motion: reduce) {
  .lang-menu {
    transition: opacity var(--transition-base);
    transform: none;
  }
}

/* ==========================================================================
   SCROLL ANIMATIONS
   Animaciones que se activan al hacer scroll
   ========================================================================== */

/* Fade in from bottom */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.fade-in-up.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Fade in from left */
.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all var(--transition-slow);
}

.fade-in-left.in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Fade in from right */
.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all var(--transition-slow);
}

.fade-in-right.in-view {
  opacity: 1;
  transform: translateX(0);
}

/* Staggered animations */
.stagger-animation > * {
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.stagger-animation.in-view > *:nth-child(1) { transition-delay: 0ms; }
.stagger-animation.in-view > *:nth-child(2) { transition-delay: 100ms; }
.stagger-animation.in-view > *:nth-child(3) { transition-delay: 200ms; }
.stagger-animation.in-view > *:nth-child(4) { transition-delay: 300ms; }
.stagger-animation.in-view > *:nth-child(5) { transition-delay: 400ms; }
.stagger-animation.in-view > *:nth-child(6) { transition-delay: 500ms; }

.stagger-animation.in-view > * {
  opacity: 1;
  transform: translateY(0);
}

/* Desactivar scroll animations para usuarios con preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .fade-in-left,
  .fade-in-right,
  .stagger-animation > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ==========================================================================
   FOCUS ANIMATIONS
   Animaciones específicas para estados de foco
   ========================================================================== */

/* Focus ring animation */
@media (prefers-reduced-motion: no-preference) {
  *:focus-visible {
    animation: focus-pulse 0.6s ease-out;
  }
}

@keyframes focus-pulse {
  0% {
    outline-width: 0px;
    outline-offset: 0px;
  }
  50% {
    outline-width: 4px;
    outline-offset: 4px;
  }
  100% {
    outline-width: 3px;
    outline-offset: 2px;
  }
}

/* ==========================================================================
   FORM ANIMATIONS
   Animaciones para estados de formulario
   ========================================================================== */

/* Input focus animations */
.form-input,
.form-textarea,
.form-select {
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  transform: scale(1.002);
}

@media (prefers-reduced-motion: reduce) {
  .form-input:focus,
  .form-textarea:focus,
  .form-select:focus {
    transform: none;
  }
}

/* Success/error state animations */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes success-pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  70% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.form-input--error {
  animation: shake 0.5s ease-in-out;
}

.form-input--success {
  animation: success-pulse 0.6s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .form-input--error,
  .form-input--success {
    animation: none;
  }
}

/* ==========================================================================
   PARALLAX EFFECTS
   Efectos sutiles de parallax para elementos decorativos
   ========================================================================== */

@media (prefers-reduced-motion: no-preference) {
  .parallax-slow {
    transform: translateY(var(--parallax-offset, 0));
    transition: transform 0.1s linear;
  }
}

/* ==========================================================================
   UTILITY ANIMATIONS
   Clases de utilidad para animaciones comunes
   ========================================================================== */

.animate-bounce {
  animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

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

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

.animate-fade-in {
  animation: fade-in 0.5s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-slide-in-right {
  animation: slide-in-right 0.5s ease-out;
}

@keyframes slide-in-right {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.animate-slide-in-left {
  animation: slide-in-left 0.5s ease-out;
}

@keyframes slide-in-left {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Desactivar todas las utility animations para usuarios con preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  .animate-bounce,
  .animate-pulse,
  .animate-fade-in,
  .animate-slide-in-right,
  .animate-slide-in-left {
    animation: none;
  }
}

/* ==========================================================================
   SCROLL INDICATOR
   Indicador de progreso de scroll
   ========================================================================== */

.scroll-indicator {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gold);
  z-index: var(--z-fixed);
  transform-origin: left;
  transition: transform 0.1s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .scroll-indicator {
    display: none;
  }
}

/* ==========================================================================
   MODAL ANIMATIONS
   Animaciones para modales y overlays
   ========================================================================== */

.modal-overlay {
  opacity: 0;
  transition: opacity var(--transition-base);
}

.modal-overlay.is-open {
  opacity: 1;
}

.modal {
  transform: translateY(-50px) scale(0.95);
  opacity: 0;
  transition: all var(--transition-base);
}

.modal.is-open {
  transform: translateY(0) scale(1);
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .modal {
    transform: none;
    transition: opacity var(--transition-base);
  }
  
  .modal.is-open {
    transform: none;
  }
}

/* ==========================================================================
   NOTIFICATION ANIMATIONS
   Animaciones para mensajes de notificación
   ========================================================================== */

.notification {
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.notification.show {
  transform: translateX(0);
}

.notification.hide {
  transform: translateX(100%);
}

@media (prefers-reduced-motion: reduce) {
  .notification {
    transform: none;
    opacity: 0;
    transition: opacity var(--transition-base);
  }
  
  .notification.show {
    opacity: 1;
  }
  
  .notification.hide {
    opacity: 0;
  }
}