/* ===================================
   SCROLL-TRIGGERED ANIMATIONS CSS
   =================================== */

/* Base animation styles - elements start hidden */
.scroll-reveal,
.scroll-reveal-stagger,
.scroll-reveal-slide,
.scroll-reveal-fade {
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reveal Animation - Fade in with slight scale */
.scroll-reveal {
    transform: translateY(30px) scale(0.95);
    transition-delay: var(--animation-delay, 0s);
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Stagger Animation - For cards and timeline items */
.scroll-reveal-stagger {
    transform: translateY(50px) rotateX(10deg);
    transition-delay: var(--stagger-delay, 0s);
    transition-duration: 0.6s;
}

.scroll-reveal-stagger.revealed {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
}

/* Slide Animation - For headers */
.scroll-reveal-slide {
    transform: translateX(-50px);
    transition-duration: 0.7s;
}

.scroll-reveal-slide.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Fade Animation - For text elements */
.scroll-reveal-fade {
    transform: translateY(20px);
    transition-delay: var(--fade-delay, 0s);
    transition-duration: 0.5s;
}

.scroll-reveal-fade.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--color-primary) 0%, 
        var(--color-primary-light) 50%, 
        var(--color-secondary) 100%);
    z-index: var(--z-tooltip);
    transition: width 0.1s ease-out, box-shadow 0.3s ease-out;
    box-shadow: 0 2px 10px rgba(0, 102, 255, 0.3);
}

.scroll-progress::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8));
    animation: progressGlow 2s ease-in-out infinite;
}

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

/* Parallax Background Effects */
.parallax-element {
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

.parallax-bg {
    position: relative;
    overflow: hidden;
}

.parallax-bg::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 0;
    width: 100%;
    height: 120%;
    background: linear-gradient(135deg, 
        rgba(0, 102, 255, 0.02) 0%, 
        rgba(108, 92, 231, 0.02) 50%, 
        rgba(255, 107, 53, 0.02) 100%);
    will-change: transform;
    z-index: -1;
}

/* Enhanced Section Animations */
section.scroll-reveal {
    position: relative;
    overflow: hidden;
}

section.scroll-reveal::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent);
    transition: left 0.8s ease-out;
    pointer-events: none;
    z-index: 1;
}

section.scroll-reveal.revealed::after {
    left: 100%;
}

/* Card Hover Enhancements with Scroll Animations */
.philosophy-card.scroll-reveal-stagger {
    transform: translateY(50px) scale(0.9);
    filter: blur(2px);
}

.philosophy-card.scroll-reveal-stagger.revealed {
    transform: translateY(0) scale(1);
    filter: blur(0);
}

.philosophy-card.revealed:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Experience Timeline Enhancements */
.experience-content.scroll-reveal-stagger {
    transform: translateX(-100px) rotateY(15deg);
    opacity: 0;
}

.experience-content.scroll-reveal-stagger.revealed {
    transform: translateX(0) rotateY(0deg);
    opacity: 1;
}

/* Skills Section Animations */
.skills-card.scroll-reveal-stagger {
    transform: translateY(60px) rotateZ(5deg);
    opacity: 0;
}

.skills-card.scroll-reveal-stagger.revealed {
    transform: translateY(0) rotateZ(0deg);
    opacity: 1;
}

/* Header Animations */
.header h3.scroll-reveal-slide {
    position: relative;
    overflow: hidden;
}

.header h3.scroll-reveal-slide::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--color-primary), 
        var(--color-secondary));
    transition: left 0.8s ease-out 0.3s;
}

.header h3.scroll-reveal-slide.revealed::before {
    left: 0;
}

/* Text Reveal Animations */
.scroll-reveal-fade p,
.scroll-reveal-fade li {
    position: relative;
    overflow: hidden;
}

.scroll-reveal-fade.revealed p::after,
.scroll-reveal-fade.revealed li::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(0, 102, 255, 0.1), 
        transparent);
    animation: textReveal 1s ease-out;
}

@keyframes textReveal {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Floating Elements Enhanced Animation */
.floating-element.parallax-element {
    animation-play-state: running;
    transition: transform 0.3s ease-out;
}

.floating-element.parallax-element:hover {
    animation-play-state: paused;
    transform: scale(1.1) !important;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .scroll-reveal,
    .scroll-reveal-stagger,
    .scroll-reveal-slide,
    .scroll-reveal-fade {
        transition-duration: 0.5s;
    }
    
    .scroll-reveal-stagger {
        transform: translateY(30px);
    }
    
    .scroll-reveal-slide {
        transform: translateX(-30px);
    }
    
    /* Reduce parallax on mobile for better performance */
    .parallax-element {
        transform: none !important;
    }
    
    .parallax-bg::before {
        display: none;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .scroll-reveal,
    .scroll-reveal-stagger,
    .scroll-reveal-slide,
    .scroll-reveal-fade,
    .parallax-element,
    .floating-element {
        transition: none !important;
        animation: none !important;
        transform: none !important;
    }
    
    .scroll-progress {
        transition: none;
    }
}

/* Reduced motion fallback */
.reduced-motion .scroll-reveal,
.reduced-motion .scroll-reveal-stagger,
.reduced-motion .scroll-reveal-slide,
.reduced-motion .scroll-reveal-fade {
    opacity: 1 !important;
    transform: none !important;
}

/* Performance Optimizations - 60fps animations using only transform and opacity */
.scroll-reveal,
.scroll-reveal-stagger,
.scroll-reveal-slide,
.scroll-reveal-fade,
.parallax-element {
    will-change: transform, opacity;
    backface-visibility: hidden;
    perspective: 1000px;
    transform: translate3d(0, 0, 0); /* Force GPU acceleration */
}

/* Optimized transitions - only transform and opacity for 60fps */
.scroll-reveal,
.scroll-reveal-stagger,
.scroll-reveal-slide,
.scroll-reveal-fade {
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Remove will-change after animation completes to free up GPU memory */
.scroll-reveal.revealed,
.scroll-reveal-stagger.revealed,
.scroll-reveal-slide.revealed,
.scroll-reveal-fade.revealed {
    will-change: auto;
}

/* Loading State Animations */
.scroll-reveal-loading {
    position: relative;
    overflow: hidden;
}

.scroll-reveal-loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Intersection Observer Fallback */
.no-intersection-observer .scroll-reveal,
.no-intersection-observer .scroll-reveal-stagger,
.no-intersection-observer .scroll-reveal-slide,
.no-intersection-observer .scroll-reveal-fade {
    opacity: 1;
    transform: none;
}

/* Custom Scroll Animations for Specific Elements */
.hero-scroll-indicator.scroll-reveal {
    animation: bounceIn 1s ease-out 2s both;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.3);
    }
    50% {
        opacity: 1;
        transform: translateY(-10px) scale(1.05);
    }
    70% {
        transform: translateY(5px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Scroll-triggered Counter Animations */
.counter-animation {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.counter-animation.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Button Animations on Scroll */
.btn.scroll-reveal-fade.revealed {
    animation: buttonPulse 2s ease-in-out infinite;
}

@keyframes buttonPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 102, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(0, 102, 255, 0);
    }
}