/* ════════════════════════════════════════════════════════════════
   SCROLL-TRIGGERED ANIMATIONS (2026 Best Practice)
   Intersection Observer API for performant animations
   ════════════════════════════════════════════════════════════════ */

/* Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease-in forwards;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    animation: fadeInLeft 0.8s ease-in-out forwards;
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    animation: fadeInRight 0.8s ease-in-out forwards;
}

.zoom-in {
    opacity: 0;
    transform: scale(0.9);
    animation: zoomIn 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.slide-in-bottom {
    opacity: 0;
    transform: translateY(50px);
    animation: slideInBottom 0.8s ease-out forwards;
}

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

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

@keyframes fadeInUp {
    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);
    }
}

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

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

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

/* Stagger animations for multiple elements */
.fade-in-up:nth-child(1) { animation-delay: 0.1s; }
.fade-in-up:nth-child(2) { animation-delay: 0.2s; }
.fade-in-up:nth-child(3) { animation-delay: 0.3s; }
.fade-in-up:nth-child(4) { animation-delay: 0.4s; }
.fade-in-up:nth-child(5) { animation-delay: 0.5s; }
.fade-in-up:nth-child(6) { animation-delay: 0.6s; }

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

/* Utility: disable animation during loading */
.no-animation {
    animation: none !important;
}