/* Infrastructure Animations */

/* =============================================
   MODERN ANIMATION BEST PRACTICES
   - Uses CSS custom properties for timing
   - Respects prefers-reduced-motion
   - GPU-accelerated transforms
   ============================================= */

:root {
    /* Animation timing tokens */
    --duration-fast: 0.15s;
    --duration-normal: 0.3s;
    --duration-slow: 0.5s;
    --duration-slower: 0.8s;
    
    /* Easing functions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

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

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

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

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

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

@keyframes flow {
    0% {
        stroke-dashoffset: 20;
    }
    100% {
        stroke-dashoffset: 0;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
    }
    50% {
        box-shadow: 0 0 40px rgba(245, 158, 11, 0.4);
    }
}

@keyframes pulseHighlight {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
    }
    25% {
        transform: scale(1.02);
        box-shadow: 0 0 30px rgba(245, 158, 11, 0.4);
    }
    50% {
        transform: scale(1);
        box-shadow: 0 0 0 15px rgba(245, 158, 11, 0);
    }
    75% {
        transform: scale(1.02);
        box-shadow: 0 0 30px rgba(245, 158, 11, 0.4);
    }
}

@keyframes rackSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scaleY(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scaleY(1);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

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

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

.animate-slide-in-left {
    animation: slideInLeft 0.5s ease forwards;
}

.animate-slide-in-right {
    animation: slideInRight 0.5s ease forwards;
}

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

.animate-ping {
    animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
}

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

/* Staggered Animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* Rack Unit Animations */
.rack-unit {
    animation: rackSlideIn 0.4s ease forwards;
    opacity: 0;
}

.rack-unit:nth-child(1) { animation-delay: 0ms; }
.rack-unit:nth-child(2) { animation-delay: 100ms; }
.rack-unit:nth-child(3) { animation-delay: 200ms; }
.rack-unit:nth-child(4) { animation-delay: 300ms; }
.rack-unit:nth-child(5) { animation-delay: 400ms; }
.rack-unit:nth-child(6) { animation-delay: 500ms; }
.rack-unit:nth-child(7) { animation-delay: 600ms; }
.rack-unit:nth-child(8) { animation-delay: 700ms; }

/* Flow Lines */
.flow-line {
    stroke-dasharray: 10 10;
    animation: flow 1s linear infinite;
}

/* Hover Transitions */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.4);
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading States */
.skeleton {
    background: linear-gradient(90deg, var(--slate-700) 25%, var(--slate-600) 50%, var(--slate-700) 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Button Press Effect */
.btn-press {
    transition: transform 0.1s ease;
}

.btn-press:active {
    transform: scale(0.97);
}

/* Card Hover Effects */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Data Flow Animation for Architecture */
.data-flow {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #0ea5e9;
    border-radius: 50%;
    animation: dataFlow 2s ease-in-out infinite;
}

@keyframes dataFlow {
    0% {
        top: 0;
        opacity: 0;
    }
    20% {
        opacity: 1;
    }
    80% {
        opacity: 1;
    }
    100% {
        top: 100%;
        opacity: 0;
    }
}

/* Gradient Animation for Hero */
.animated-gradient {
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ========================================
   VISIO DIAGRAM PREMIUM ANIMATIONS
   ======================================== */

/* Connection Line Pulse */
@keyframes connectionPulse {
    0%, 100% { 
        stroke-opacity: 0.3;
        stroke-width: 2;
    }
    50% { 
        stroke-opacity: 0.8;
        stroke-width: 3.5;
    }
}

/* Enhanced Node Glow */
@keyframes nodeGlow {
    0%, 100% {
        filter: drop-shadow(0 0 5px currentColor);
    }
    50% {
        filter: drop-shadow(0 0 20px currentColor);
    }
}

/* Status LED Pulse */
@keyframes statusPulse {
    0%, 100% { 
        opacity: 1;
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
    }
    50% { 
        opacity: 0.8;
        transform: scale(1.2);
        box-shadow: 0 0 0 4px rgba(34, 197, 94, 0);
    }
}

/* Data Flowing Through Lines */
@keyframes dataFlow {
    0% { stroke-dashoffset: 30; }
    100% { stroke-dashoffset: 0; }
}

/* Connection Beam Effect */
@keyframes beamGlow {
    0%, 100% {
        filter: drop-shadow(0 0 3px currentColor) drop-shadow(0 0 6px currentColor);
    }
    50% {
        filter: drop-shadow(0 0 8px currentColor) drop-shadow(0 0 15px currentColor);
    }
}

.visio-node {
    animation: visioNodeEnter 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
}

@keyframes visioNodeEnter {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.visio-node:nth-child(1) { animation-delay: 0.1s; }
.visio-node:nth-child(2) { animation-delay: 0.15s; }
.visio-node:nth-child(3) { animation-delay: 0.2s; }
.visio-node:nth-child(4) { animation-delay: 0.25s; }
.visio-node:nth-child(5) { animation-delay: 0.3s; }
.visio-node:nth-child(6) { animation-delay: 0.35s; }
.visio-node:nth-child(7) { animation-delay: 0.4s; }
.visio-node:nth-child(8) { animation-delay: 0.45s; }

.visio-fabric {
    animation: fabricSlide 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
}

@keyframes fabricSlide {
    0% {
        opacity: 0;
        transform: scaleX(0.8);
    }
    100% {
        opacity: 1;
        transform: scaleX(1);
    }
}

.visio-dc-box {
    animation: dcBoxReveal 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

@keyframes dcBoxReveal {
    0% {
        opacity: 0;
        transform: translateY(30px);
        border-color: rgba(245, 158, 11, 0);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        border-color: rgba(245, 158, 11, 0.4);
    }
}

.visio-dc-box.visible {
    opacity: 1;
}

/* Connection Lines - Premium Styling */
.visio-connection-line {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    animation: connectionPulse 2.5s ease-in-out infinite;
}

.visio-connection-line:nth-child(odd) {
    animation-delay: 0.75s;
}

.visio-connection-animated {
    stroke-dasharray: 8 4;
    animation: dataFlow 1s linear infinite, connectionPulse 2.5s ease-in-out infinite;
}

/* Particle effect for active data transfer */
@keyframes particleFlow {
    0% {
        offset-distance: 0%;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        offset-distance: 100%;
        opacity: 0;
    }
}

/* Focus States */
button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid #f59e0b;
    outline-offset: 2px;
}

/* Skip to content link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 1rem 2rem;
    background: #f59e0b;
    color: #000;
    font-weight: 700;
    z-index: 9999;
    transition: top var(--duration-fast) ease;
}

.skip-link:focus {
    top: 0.5rem;
}

/* Reduced Motion - respects user preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
    
    .rack-unit {
        opacity: 1;
    }
}

/* Print styles - hide animations */
@media print {
    * {
        animation: none !important;
        transition: none !important;
    }
}