/**
 * MODERN CSS ANIMATIONS
 * Reemplaza: Animate.css
 * Más ligero, más rápido, mejor performance
 */

/* ============================================
   FADE ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

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

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

/* ============================================
   SCALE ANIMATIONS
   ============================================ */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes scaleUp {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.05);
    }
}

/* ============================================
   SLIDE ANIMATIONS
   ============================================ */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

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

/* ============================================
   ROTATE ANIMATIONS
   ============================================ */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ============================================
   BOUNCE ANIMATIONS
   ============================================ */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* ============================================
   ANIMATION CLASSES (Manual)
   ============================================ */
.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.4s ease-out;
}

.animate-bounce-in {
    animation: bounceIn 0.8s ease-out;
}

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

/* ============================================
   SCROLL-TRIGGERED ANIMATIONS
   (Usar con Intersection Observer)
   ============================================ */

/* Estado inicial: elementos invisibles */
.scroll-animate {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

/* Variantes de animación */
.scroll-fade-up {
    opacity: 0;
    transform: translateY(30px);
}

.scroll-fade-down {
    opacity: 0;
    transform: translateY(-30px);
}

.scroll-fade-left {
    opacity: 0;
    transform: translateX(-30px);
}

.scroll-fade-right {
    opacity: 0;
    transform: translateX(30px);
}

.scroll-scale {
    opacity: 0;
    transform: scale(0.9);
}

/* Estado visible: activado por Intersection Observer */
.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1);
}

/* ============================================
   STAGGERED ANIMATIONS (Cascada)
   ============================================ */
.stagger-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.stagger-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Delays para efecto cascada */
.stagger-item:nth-child(1) { transition-delay: 0.1s; }
.stagger-item:nth-child(2) { transition-delay: 0.2s; }
.stagger-item:nth-child(3) { transition-delay: 0.3s; }
.stagger-item:nth-child(4) { transition-delay: 0.4s; }
.stagger-item:nth-child(5) { transition-delay: 0.5s; }
.stagger-item:nth-child(6) { transition-delay: 0.6s; }

/* ============================================
   HOVER ANIMATIONS
   ============================================ */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.hover-scale {
    transition: transform 0.3s ease;
}

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

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(25, 119, 204, 0.4);
}

/* ============================================
   LOADING ANIMATIONS
   ============================================ */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* ============================================
   TRANSITION UTILITIES
   ============================================ */
.transition-all {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-fast {
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-slow {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Use GPU acceleration for transforms */
.will-animate {
    will-change: transform, opacity;
}

/* Remove will-change after animation completes */
.animation-complete {
    will-change: auto;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-animate,
    .stagger-item {
        opacity: 1;
        transform: none;
    }
}