/*
  ============================================
  BGF WELDING - ANIMATIONS
  Animaciones sutiles y performantes
  ============================================
*/

/* ========== ANIMACIONES DE ENTRADA ========== */

/* Fade In */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--animation-duration-base) var(--ease-out-quad) forwards;
}

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

/* Fade In Up */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp var(--animation-duration-slow) var(--ease-out-quad) forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Down */
.fade-in-down {
  opacity: 0;
  transform: translateY(-30px);
  animation: fadeInDown var(--animation-duration-slow) var(--ease-out-quad) forwards;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Left */
.fade-in-left {
  opacity: 0;
  transform: translateX(-50px);
  animation: fadeInLeft var(--animation-duration-slow) var(--ease-out-quad) forwards;
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fade In Right */
.fade-in-right {
  opacity: 0;
  transform: translateX(50px);
  animation: fadeInRight var(--animation-duration-slow) var(--ease-out-quad) forwards;
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scale In */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  animation: scaleIn var(--animation-duration-base) var(--ease-out-back) forwards;
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ========== ANIMACIONES CON INTERSECTION OBSERVER ========== */
/* Estas clases se aplican cuando el elemento entra en viewport */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity var(--animation-duration-slower) var(--ease-out-quad),
              transform var(--animation-duration-slower) var(--ease-out-quad);
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--animation-duration-slower) var(--ease-out-quad),
              transform var(--animation-duration-slower) var(--ease-out-quad);
}

.animate-on-scroll-left.animated {
  opacity: 1;
  transform: translateX(0);
}

.animate-on-scroll-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--animation-duration-slower) var(--ease-out-quad),
              transform var(--animation-duration-slower) var(--ease-out-quad);
}

.animate-on-scroll-right.animated {
  opacity: 1;
  transform: translateX(0);
}

/* ========== ANIMACIONES DE HOVER ========== */

/* Hover Lift */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

/* Hover Scale */
.hover-scale {
  transition: transform var(--transition-base);
}

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

/* Hover Glow */
.hover-glow {
  position: relative;
  transition: all var(--transition-base);
}

.hover-glow::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: radial-gradient(circle, var(--color-accent), transparent);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-base);
}

.hover-glow:hover::after {
  opacity: 0.3;
}

/* ========== ANIMACIONES DE NAVEGACIÓN ========== */

/* Header Slide Down */
@keyframes headerSlideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

header {
  animation: headerSlideDown var(--animation-duration-base) var(--ease-out-quad);
}

/* Mobile Menu Slide */
.mobile-nav {
  transition: transform var(--animation-duration-base) var(--ease-out-quad);
}

/* ========== ANIMACIONES DE CARGA ========== */

/* Spinner */
.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-left-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Pulse */
.pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

/* ========== ANIMACIONES DE TEXTO ========== */

/* Typing Effect (para hero title) */
@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes blink {
  50% {
    border-color: transparent;
  }
}

/* Gradient Text Animation */
.gradient-text {
  background: linear-gradient(
    90deg,
    var(--color-accent),
    var(--color-accent-glow),
    var(--color-accent)
  );
  background-size: 200% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientMove 3s ease infinite;
}

@keyframes gradientMove {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/* ========== ANIMACIONES DE FONDO ========== */

/* Parallax Effect */
.parallax {
  will-change: transform;
  transition: transform 0.3s ease-out;
}

/* Floating Animation */
.float {
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ========== ANIMACIONES DE PARTÍCULAS/DECORATIVAS ========== */

/* Spark Animation (para efecto de soldadura) */
@keyframes spark {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(
      calc(var(--x, 0) * 1px),
      calc(var(--y, 0) * 1px)
    ) scale(0);
    opacity: 0;
  }
}

.spark {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-accent-glow);
  border-radius: 50%;
  pointer-events: none;
  animation: spark 1s ease-out forwards;
  box-shadow: 0 0 10px var(--color-accent-glow);
}

/* ========== ANIMACIONES DE PROGRESO ========== */

/* Progress Bar */
@keyframes progressBar {
  from {
    transform: scaleX(0);
    transform-origin: left;
  }
  to {
    transform: scaleX(1);
    transform-origin: left;
  }
}

.progress-bar {
  animation: progressBar 1s var(--ease-out-quad) forwards;
}

/* ========== ANIMACIONES DE NÚMEROS (Counter) ========== */
.counter {
  display: inline-block;
  transition: all var(--animation-duration-base);
}

/* ========== ANIMACIONES DE REVELADO ========== */

/* Reveal from Bottom */
.reveal-bottom {
  position: relative;
  overflow: hidden;
}

.reveal-bottom::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-white);
  transform: translateY(0);
  animation: revealBottom 1s var(--ease-out-quad) forwards;
}

@keyframes revealBottom {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-100%);
  }
}

/* ========== ANIMACIONES DE FORM ========== */

/* Input Focus Animation */
.form-input,
.form-textarea,
.form-select {
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  animation: inputFocus var(--animation-duration-fast) var(--ease-out-quad);
}

@keyframes inputFocus {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

/* Button Press Animation */
.btn:active {
  animation: buttonPress var(--animation-duration-fast) var(--ease-out-quad);
}

@keyframes buttonPress {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.95);
  }
  100% {
    transform: scale(1);
  }
}

/* ========== ANIMACIONES DE SHIMMER ========== */

/* Shimmer Loading Effect */
.shimmer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    90deg,
    var(--color-light-gray) 0%,
    var(--color-light) 50%,
    var(--color-light-gray) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

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

/* ========== ANIMACIONES DE SCROLL ========== */

/* Smooth Scroll Reveal */
.scroll-reveal {
  opacity: 0;
  transform: translateY(50px);
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s var(--ease-out-quad),
              transform 0.8s var(--ease-out-quad);
}

/* Stagger Animation (para múltiples elementos) */
.stagger-item:nth-child(1) { animation-delay: 0s; }
.stagger-item:nth-child(2) { animation-delay: 0.1s; }
.stagger-item:nth-child(3) { animation-delay: 0.2s; }
.stagger-item:nth-child(4) { animation-delay: 0.3s; }
.stagger-item:nth-child(5) { animation-delay: 0.4s; }
.stagger-item:nth-child(6) { animation-delay: 0.5s; }

/* ========== PERFORMANCE OPTIMIZATION ========== */

/* Reducir movimiento para usuarios con preferencias de accesibilidad */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Usar GPU acceleration para animaciones suaves */
.gpu-accelerated {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}