/**
 * Modern Animations CSS
 * Enhanced animations with Web Animations API support and accessibility
 */

:root {
    --animation-duration-multiplier: 1;
    --animation-easing: cubic-bezier(0.4, 0, 0.2, 1);
    --animation-easing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --glow-intensity: 20px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    :root {
        --animation-duration-multiplier: 0.01;
    }
}

/* Modern Pulsar Wave Animation */
@keyframes pulsar-wave {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(3);
        opacity: 0;
    }
}

/* Black Hole Spiral Animation */
@keyframes blackhole-spiral {
    0% {
        transform: translate(var(--start-x, 0), var(--start-y, 0)) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(0, 0) scale(0.8) rotate(180deg);
        opacity: 0.8;
    }
    100% {
        transform: translate(-50%, -50%) scale(0) rotate(360deg);
        opacity: 0;
    }
}

/* Wormhole Expansion */
@keyframes wormhole-expand {
    0% {
        transform: translate(-50%, -50%) scale(0.1);
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
    100% {
        transform: translate(-50%, -50%) scale(3);
        opacity: 0;
    }
}

/* Supernova Burst */
@keyframes supernova-burst {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    20% {
        transform: translate(
            calc(-50% + cos(var(--angle, 0)) * 100px),
            calc(-50% + sin(var(--angle, 0)) * 100px)
        ) scale(1.2);
        opacity: 1;
    }
    100% {
        transform: translate(
            calc(-50% + cos(var(--angle, 0)) * 200px),
            calc(-50% + sin(var(--angle, 0)) * 200px)
        ) scale(0);
        opacity: 0;
    }
}

/* Asteroid Fall Animation */
@keyframes asteroid-fall {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translate(-20%, 120vh) rotate(360deg);
        opacity: 0;
    }
}

/* Cosmic Ray Flash */
@keyframes cosmic-ray-flash {
    0% {
        opacity: 0;
        transform: translateY(0) scaleY(0.5);
    }
    50% {
        opacity: 1;
        transform: translateY(20px) scaleY(1);
    }
    100% {
        opacity: 0;
        transform: translateY(40px) scaleY(0.5);
    }
}

/* Nebula Drift Animation */
@keyframes nebula-drift {
    0% {
        transform: translate(0, 0) scale(0.8);
        opacity: 0;
    }
    20% {
        opacity: 0.6;
    }
    80% {
        opacity: 0.6;
    }
    100% {
        transform: translate(
            calc((random() - 0.5) * 50px),
            calc((random() - 0.5) * 50px)
        ) scale(1.2);
        opacity: 0;
    }
}

/* Binary Star Orbits */
@keyframes binary-orbit-1 {
    0% {
        transform: translate(-50%, -50%) rotate(0deg) translateX(40px);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg) translateX(40px);
    }
}

@keyframes binary-orbit-2 {
    0% {
        transform: translate(-50%, -50%) rotate(180deg) translateX(40px);
    }
    100% {
        transform: translate(-50%, -50%) rotate(540deg) translateX(40px);
    }
}

/* Quantum Tunnel Animation */
@keyframes quantum-tunnel {
    0% {
        transform: translateX(0) scale(1);
        opacity: 1;
    }
    30% {
        opacity: 0.3;
    }
    70% {
        opacity: 0.3;
    }
    100% {
        transform: translateX(300px) scale(1);
        opacity: 1;
    }
}

/* Particle Glow Effect */
@keyframes particle-glow {
    0%, 100% {
        filter: drop-shadow(0 0 2px currentColor);
    }
    50% {
        filter: drop-shadow(0 0 var(--glow-intensity) currentColor);
    }
}

/* Smooth Fade In */
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth Fade Out */
@keyframes fade-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* Scale Pulse */
@keyframes scale-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* Rotate Continuous */
@keyframes rotate-continuous {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Shimmer Effect */
@keyframes shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

/* Bounce In */
@keyframes bounce-in {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Slide In from Right */
@keyframes slide-in-right {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide In from Left */
@keyframes slide-in-left {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Enhanced Demo Card Hover */
.demo-card {
    transition: transform calc(300ms * var(--animation-duration-multiplier)) var(--animation-easing),
                box-shadow calc(300ms * var(--animation-duration-multiplier)) var(--animation-easing);
}

.demo-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.2);
}

.demo-card:focus {
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 4px;
}

/* Accessibility: Skip Link */
.skip-link:focus {
    outline: 3px solid #fff;
    outline-offset: 2px;
}

/* Performance: GPU Acceleration Hints */
.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform;
}

/* Smooth Transitions */
.smooth-transition {
    transition: all calc(200ms * var(--animation-duration-multiplier)) var(--animation-easing);
}

/* Glow Animation Utility Classes */
.glow-white {
    animation: particle-glow calc(2s * var(--animation-duration-multiplier)) ease-in-out infinite;
    --glow-intensity: 20px;
}

.glow-blue {
    animation: particle-glow calc(2s * var(--animation-duration-multiplier)) ease-in-out infinite;
    --glow-intensity: 20px;
    color: rgba(100, 150, 255, 1);
}

.glow-purple {
    animation: particle-glow calc(2s * var(--animation-duration-multiplier)) ease-in-out infinite;
    --glow-intensity: 20px;
    color: rgba(200, 100, 255, 1);
}

/* Loading Animation */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.loading-spinner {
    animation: spin calc(1s * var(--animation-duration-multiplier)) linear infinite;
}

/* Utility: Pause on Reduced Motion */
.reduced-motion * {
    animation-play-state: paused !important;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .demo-card {
        border: 2px solid currentColor;
    }

    .demo-card:focus {
        outline-width: 3px;
    }
}

/* Dark Mode Support (if needed) */
@media (prefers-color-scheme: light) {
    :root {
        /* Adjust colors for light mode if needed */
    }
}