/* Pune AI Collective - Animations Stylesheet
   Subtle animations and transitions inspired by Zara's minimalist approach
   Performance-first: using transform and opacity only for smooth animations
*/

/* Animation variables */
:root {
    /* Timing functions */
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    
    /* Animation durations */
    --duration-fast: 0.15s;
    --duration-normal: 0.3s;
    --duration-slow: 0.5s;
    
    /* Animation delays for staggered effects */
    --delay-1: 0.1s;
    --delay-2: 0.2s;
    --delay-3: 0.3s;
}

/* Base animation setup - smooth transitions for interactive elements */
a,
button,
.social-icon,
.nav-link,
.cta-button,
.contact-link {
    transition: all var(--duration-normal) var(--ease-out-quart);
}

/* Page load animations */
.hero-section {
    animation: fadeInUp var(--duration-slow) var(--ease-out-expo) forwards;
}

.hero-title {
    animation: fadeInUp var(--duration-slow) var(--ease-out-expo) var(--delay-1) both;
}

.hero-subtitle {
    animation: fadeInUp var(--duration-slow) var(--ease-out-expo) var(--delay-2) both;
}

.hero-cta {
    animation: fadeInUp var(--duration-slow) var(--ease-out-expo) var(--delay-3) both;
}

/* Navigation animations */
.navbar {
    animation: slideInDown var(--duration-normal) var(--ease-out-quart);
}

.nav-link {
    position: relative;
    overflow: hidden;
}

/* Subtle underline effect for navigation links */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--primary-color);
    transition: width var(--duration-normal) var(--ease-out-quart);
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile menu animations */
.mobile-menu-toggle {
    transition: transform var(--duration-fast) var(--ease-out-quart);
}

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

.hamburger-line {
    transform-origin: center;
    transition: all var(--duration-normal) var(--ease-in-out-quart);
}

/* Mobile menu slide animation is in responsive.css */
.nav-menu {
    transition: transform var(--duration-normal) var(--ease-in-out-quart);
}

/* Social icon animations */
.social-icon {
    transform: translateZ(0); /* Force hardware acceleration */
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.social-icon:hover,
.social-icon:focus {
    transform: translateY(-2px) scale(1.1);
}

/* Subtle pulse effect for social icons */
@keyframes subtlePulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

.social-icon:hover i,
.social-icon:focus i {
    animation: subtlePulse 2s ease-in-out infinite;
}

/* CTA Button animations */
.cta-button {
    transform: translateZ(0);
    transition: all var(--duration-normal) var(--ease-out-quart);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent
    );
    transition: left var(--duration-slow) var(--ease-out-quart);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.cta-button:active {
    transform: translateY(0);
    transition-duration: var(--duration-fast);
}

/* Contact link animations */
.contact-link {
    transform: translateZ(0);
    transition: all var(--duration-normal) var(--ease-out-quart);
}

.contact-link:hover,
.contact-link:focus {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.contact-link:active {
    transform: translateY(-1px);
    transition-duration: var(--duration-fast);
}

/* Icon bounce animation for contact links */
.contact-link:hover i,
.contact-link:focus i {
    animation: iconBounce var(--duration-normal) var(--ease-out-quart);
}

@keyframes iconBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-2px);
    }
}

/* Section reveal animations */
.content-section {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--duration-slow) var(--ease-out-expo);
}

.content-section.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation for section elements */
.section-title {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--duration-slow) var(--ease-out-expo);
}

.section-content {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--duration-slow) var(--ease-out-expo) var(--delay-1);
}

.content-section.in-view .section-title,
.content-section.in-view .section-content {
    opacity: 1;
    transform: translateY(0);
}

/* Footer animation */
.site-footer {
    animation: fadeIn var(--duration-slow) var(--ease-out-expo);
}

.footer-link {
    transition: all var(--duration-normal) var(--ease-out-quart);
    position: relative;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: currentColor;
    transition: width var(--duration-normal) var(--ease-out-quart);
}

.footer-link:hover::after,
.footer-link:focus::after {
    width: 100%;
}

/* 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 slideInDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Loading animation for async content */
@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: 200px 0;
    }
}

.loading-shimmer {
    background: linear-gradient(90deg, 
        var(--accent-color) 25%, 
        #f0f0f0 50%, 
        var(--accent-color) 75%
    );
    background-size: 200px 100%;
    animation: shimmer 1.5s infinite;
}

/* Focus animations */
*:focus {
    animation: focusPulse 0.3s var(--ease-out-quart);
}

@keyframes focusPulse {
    0% {
        outline-offset: 2px;
    }
    50% {
        outline-offset: 4px;
    }
    100% {
        outline-offset: 2px;
    }
}

/* Scroll-triggered animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--duration-slow) var(--ease-out-expo);
}

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

/* Performance optimizations */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Reduced motion media query overrides */
@media (prefers-reduced-motion: reduce) {
    /* Disable animations for users who prefer reduced motion */
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    /* Remove transform animations but keep opacity changes */
    .hero-section,
    .hero-title,
    .hero-subtitle,
    .hero-cta,
    .content-section,
    .section-title,
    .section-content {
        transform: none !important;
        animation: none !important;
    }
    
    /* Keep essential focus indicators */
    *:focus {
        animation: none;
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
    
    /* Remove hover transforms but keep color changes */
    .social-icon:hover,
    .social-icon:focus,
    .cta-button:hover,
    .cta-button:focus,
    .contact-link:hover,
    .contact-link:focus {
        transform: none !important;
    }
}

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
    /* Enhance animations for better visibility in high contrast mode */
    .nav-link::after {
        height: 2px;
    }
    
    .footer-link::after {
        height: 2px;
    }
    
    /* More prominent focus indicators */
    *:focus {
        outline-width: 3px;
        outline-offset: 3px;
    }
}

/* Print mode - disable all animations */
@media print {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}