/* 
 * Universal Skeleton Lazy Loader
 * Usage: Add class "skeleton-lazy" to any image container
 * Script and CSS by Arman Melkonyan © CarPark.am
 *class = skeleton-pulse h-md w-full rounded , skeleton-blue skeleton-breathe , dark-mode skeleton-glow, skeleton-rainbow, skeleton-shimmer - with skeleton-progress
 */

/* Base skeleton container */
.skeleton-lazy {
    position: relative;
    overflow: hidden;
    background: linear-gradient(90deg, 
        var(--skeleton-bg, #f0f2f5) 0%, 
        #e6e8eb 40%, 
        #f0f2f5 80%
    );
    background-size: 400% 100%;
    animation: skeleton-wave 1.8s ease-in-out infinite;
    will-change: background-position;
    border-radius: 4px;
}

/* CSS Variables for easy theming */
:root {
    --skeleton-primary: #3498db;
    --skeleton-success: #2ecc71;
    --skeleton-warning: #f39c12;
    --skeleton-danger: #e74c3c;
    --skeleton-light: #f8f9fa;
    --skeleton-dark: #2c3e50;
    --skeleton-bg: #f0f2f5;
}

/* Main wave animation - more pronounced */
@keyframes skeleton-wave {
    0% {
        background-position: 200% 0;
    }
    50% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Pulsing animation - subtle heartbeat effect */
.skeleton-lazy.skeleton-pulse {
    animation: skeleton-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes skeleton-pulse {
    0%, 100% {
        opacity: 1;
        background-position: 200% 0;
    }
    50% {
        opacity: 0.7;
        background-position: -200% 0;
    }
}

/* Shimmer effect with overlay */
.skeleton-lazy.skeleton-shimmer::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 40%,
        rgba(255, 255, 255, 0.8) 60%,
        transparent 100%
    );
    animation: skeleton-shimmer 2.5s ease-in-out infinite;
    z-index: 1;
}

@keyframes skeleton-shimmer {
    0% {
        transform: translateX(-100%);
    }
    40%, 100% {
        transform: translateX(200%);
    }
}

/* Glowing effect */
.skeleton-lazy.skeleton-glow {
    background: linear-gradient(
        90deg,
        #f0f2f5 0%,
        #e6e8eb 20%,
        #f0f2f5 40%,
        #e6e8eb 60%,
        #f0f2f5 80%
    );
    background-size: 400% 100%;
    animation: skeleton-glow 3.5s ease-in-out infinite;
    box-shadow: 0 0 15px rgba(52, 152, 219, 0.1);
}

@keyframes skeleton-glow {
    0% {
        background-position: 200% 0;
        box-shadow: 0 0 15px rgba(52, 152, 219, 0.1);
    }
    50% {
        background-position: -200% 0;
        box-shadow: 0 0 20px rgba(52, 152, 219, 0.2);
    }
    100% {
        background-position: 200% 0;
        box-shadow: 0 0 15px rgba(52, 152, 219, 0.1);
    }
}

/* Breathing animation - like slow heartbeat */
.skeleton-lazy.skeleton-breathe {
    animation: skeleton-breathe 3s ease-in-out infinite;
}

@keyframes skeleton-breathe {
    0%, 100% {
        transform: scale(1);
        background-position: 200% 0;
    }
    33% {
        transform: scale(1.002);
        background-position: -200% 0;
    }
    66% {
        transform: scale(0.998);
    }
}

/* Bouncing animation - subtle bounce effect */
.skeleton-lazy.skeleton-bounce {
    animation: skeleton-bounce 2.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

@keyframes skeleton-bounce {
    0%, 100% {
        background-position: 200% 0;
        transform: translateY(0);
    }
    25% {
        background-position: -200% 0;
        transform: translateY(-1px);
    }
    75% {
        background-position: 200% 0;
        transform: translateY(1px);
    }
}

/* Rainbow gradient animation */
.skeleton-lazy.skeleton-rainbow {
    background: linear-gradient(
        90deg,
        #ff6b6b 0%,
        #feca57 20%,
        #48dbfb 40%,
        #1dd1a1 60%,
        #f368e0 80%,
        #ff6b6b 100%
    );
    background-size: 400% 100%;
    animation: skeleton-rainbow 4s linear infinite;
}

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

/* Floating particles effect */
.skeleton-lazy.skeleton-particles {
    position: relative;
    overflow: hidden;
}

.skeleton-lazy.skeleton-particles::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        transparent 30%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 70%
    );
    animation: skeleton-particles 3s linear infinite;
}

@keyframes skeleton-particles {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100%);
    }
}

/* Color themes for different moods */
.skeleton-lazy.skeleton-blue {
    --skeleton-bg: linear-gradient(90deg, #e3f2fd 0%, #bbdefb 40%, #e3f2fd 80%);
}

.skeleton-lazy.skeleton-green {
    --skeleton-bg: linear-gradient(90deg, #e8f5e9 0%, #c8e6c9 40%, #e8f5e9 80%);
}

.skeleton-lazy.skeleton-purple {
    --skeleton-bg: linear-gradient(90deg, #f3e5f5 0%, #e1bee7 40%, #f3e5f5 80%);
}

.skeleton-lazy.skeleton-orange {
    --skeleton-bg: linear-gradient(90deg, #fff3e0 0%, #ffe0b2 40%, #fff3e0 80%);
}

/* Image styles inside skeleton-lazy containers */
.skeleton-lazy img {
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 2;
    transform: scale(0.98);
    filter: blur(2px);
}

/* When image is loaded - smooth reveal */
.skeleton-lazy img.loaded {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
    animation: image-reveal 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes image-reveal {
    0% {
        opacity: 0;
        transform: scale(0.95);
        filter: blur(4px);
    }
    100% {
        opacity: 1;
        transform: scale(1);
        filter: blur(0);
    }
}

/* Remove skeleton background when image is loaded */
.skeleton-lazy.skeleton-loaded {
    background: transparent;
    animation: none;
}

.skeleton-lazy.skeleton-loaded::before {
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* Smooth transition when skeleton disappears */
.skeleton-lazy {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode skeleton */
.skeleton-lazy.light-mode {
    background: linear-gradient(90deg, 
        #f8f9fa 0%, 
        #e9ecef 40%, 
        #f8f9fa 80%
    );
    background-size: 400% 100%;
}

/* Dark mode skeleton */
.skeleton-lazy.dark-mode {
    background: linear-gradient(90deg, 
        #2d3436 0%, 
        #3c4245 40%, 
        #2d3436 80%
    );
    background-size: 400% 100%;
    color: #fff;
}

/* Skeleton with rounded corners */
.skeleton-lazy.rounded {
    border-radius: 12px;
}

.skeleton-lazy.rounded-full {
    border-radius: 50%;
}

/* Aspect ratio support */
.skeleton-lazy.aspect-16-9 {
    padding-bottom: 56.25%;
    height: 0;
}

.skeleton-lazy.aspect-4-3 {
    padding-bottom: 75%;
    height: 0;
}

.skeleton-lazy.aspect-1-1 {
    padding-bottom: 100%;
    height: 0;
}

.skeleton-lazy.aspect-9-16 {
    padding-bottom: 177.78%;
    height: 0;
}

/* Height presets */
.skeleton-lazy.h-sm { min-height: 100px; }
.skeleton-lazy.h-md { min-height: 200px; }
.skeleton-lazy.h-lg { min-height: 300px; }
.skeleton-lazy.h-xl { min-height: 400px; }

/* Width presets */
.skeleton-lazy.w-sm { min-width: 100px; }
.skeleton-lazy.w-md { min-width: 200px; }
.skeleton-lazy.w-lg { min-width: 300px; }
.skeleton-lazy.w-full { width: 100%; }

/* Container content alignment */
.skeleton-lazy .skeleton-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-size: 14px;
    opacity: 0.7;
    pointer-events: none;
}

/* Progress indicator for loading */
.skeleton-lazy .skeleton-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        #3498db 50%, 
        transparent 100%
    );
    width: 30%;
    animation: progress-loading 1.5s ease-in-out infinite;
    border-radius: 0 3px 3px 0;
}

@keyframes progress-loading {
    0% {
        left: -30%;
        width: 30%;
    }
    50% {
        width: 60%;
    }
    100% {
        left: 100%;
        width: 30%;
    }
}

/* Spinner overlay */
.skeleton-lazy .skeleton-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid rgba(52, 152, 219, 0.2);
    border-top-color: #3498db;
    border-radius: 50%;
    animation: skeleton-spin 1s linear infinite;
    z-index: 3;
    opacity: 0.8;
}

@keyframes skeleton-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Text skeleton variations */
.skeleton-lazy.text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-lazy.text-sm { height: 0.8em; }
.skeleton-lazy.text-lg { height: 1.2em; }
.skeleton-lazy.text-xl { height: 1.5em; }

/* Circle skeleton */
.skeleton-lazy.circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

/* Grid pattern skeleton */
.skeleton-lazy.grid-pattern {
    background-image: 
        linear-gradient(90deg, transparent 79px, #abced4 79px, #abced4 81px, transparent 81px),
        linear-gradient(#eee .1em, transparent .1em);
    background-size: 100% 1.2em;
    animation: grid-move 2s linear infinite;
}

@keyframes grid-move {
    0% { background-position: 0 0; }
    100% { background-position: 0 1.2em; }
}

/* Neon glow effect */
.skeleton-lazy.skeleton-neon {
    background: #0a0a0a;
    box-shadow: 
        0 0 5px rgba(52, 152, 219, 0.5),
        0 0 10px rgba(52, 152, 219, 0.3),
        0 0 15px rgba(52, 152, 219, 0.1),
        inset 0 0 10px rgba(52, 152, 219, 0.1);
    animation: neon-pulse 2s ease-in-out infinite;
}

@keyframes neon-pulse {
    0%, 100% {
        box-shadow: 
            0 0 5px rgba(52, 152, 219, 0.5),
            0 0 10px rgba(52, 152, 219, 0.3),
            0 0 15px rgba(52, 152, 219, 0.1),
            inset 0 0 10px rgba(52, 152, 219, 0.1);
    }
    50% {
        box-shadow: 
            0 0 10px rgba(52, 152, 219, 0.8),
            0 0 20px rgba(52, 152, 219, 0.5),
            0 0 30px rgba(52, 152, 219, 0.2),
            inset 0 0 20px rgba(52, 152, 219, 0.2);
    }
}

/* Performance optimizations */
.skeleton-lazy {
    will-change: transform, opacity, background-position;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Print styles - hide skeleton when printing */
@media print {
    .skeleton-lazy {
        background: transparent !important;
        animation: none !important;
    }
    
    .skeleton-lazy::before,
    .skeleton-lazy::after {
        display: none !important;
    }
}