/* ============================================
   ANIMATIONS LIBRARY - Reusable Animations
   Lanka Matha Tours - About Page Advanced
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ============================================ */
:root {
    /* Animation Timing */
    --timing-fast: 0.3s;
    --timing-medium: 0.6s;
    --timing-slow: 1s;
    --timing-very-slow: 2s;
    
    /* Easing Functions */
    --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Animation Delays */
    --stagger-delay: 0.15s;
    
    /* Parallax Speeds */
    --parallax-slow: 0.5;
    --parallax-medium: 0.3;
    --parallax-fast: 0.1;
    
    /* Transforms */
    --lift-distance: -10px;
    --slide-distance: 40px;
    
    /* Colors for Animations */
    --glow-primary: rgba(3, 166, 168, 0.4);
    --glow-secondary: rgba(31, 85, 123, 0.4);
}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */

/* Base Hidden State */
[data-scroll-reveal] {
    opacity: 0;
}

[data-scroll-reveal].in-view {
    opacity: 1;
}

/* Fade Up */
[data-scroll-reveal="fade-up"] {
    transform: translateY(var(--slide-distance));
    transition: opacity var(--timing-slow) var(--ease-smooth),
                transform var(--timing-slow) var(--ease-smooth);
}

[data-scroll-reveal="fade-up"].in-view {
    transform: translateY(0);
}

/* Fade Down */
[data-scroll-reveal="fade-down"] {
    transform: translateY(calc(var(--slide-distance) * -1));
    transition: opacity var(--timing-slow) var(--ease-smooth),
                transform var(--timing-slow) var(--ease-smooth);
}

[data-scroll-reveal="fade-down"].in-view {
    transform: translateY(0);
}

/* Fade Left */
[data-scroll-reveal="fade-left"] {
    transform: translateX(var(--slide-distance));
    transition: opacity var(--timing-slow) var(--ease-smooth),
                transform var(--timing-slow) var(--ease-smooth);
}

[data-scroll-reveal="fade-left"].in-view {
    transform: translateX(0);
}

/* Fade Right */
[data-scroll-reveal="fade-right"] {
    transform: translateX(calc(var(--slide-distance) * -1));
    transition: opacity var(--timing-slow) var(--ease-smooth),
                transform var(--timing-slow) var(--ease-smooth);
}

[data-scroll-reveal="fade-right"].in-view {
    transform: translateX(0);
}

/* Scale Up */
[data-scroll-reveal="scale-up"] {
    transform: scale(0.8);
    transition: opacity var(--timing-slow) var(--ease-bounce),
                transform var(--timing-slow) var(--ease-bounce);
}

[data-scroll-reveal="scale-up"].in-view {
    transform: scale(1);
}

/* Rotate In */
[data-scroll-reveal="rotate-in"] {
    transform: rotate(-10deg) scale(0.9);
    transition: opacity var(--timing-slow) var(--ease-smooth),
                transform var(--timing-slow) var(--ease-smooth);
}

[data-scroll-reveal="rotate-in"].in-view {
    transform: rotate(0deg) scale(1);
}

/* Bounce */
[data-scroll-reveal="bounce"] {
    animation: bounce-animation 2s ease-in-out infinite;
}

/* ============================================
   KEYFRAME ANIMATIONS
   ============================================ */

/* Gradient Shift Animation */
@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Float Particle Animation */
@keyframes float-particle {
    0%, 100% { 
        transform: translate(0, 0) rotate(0deg); 
        opacity: 0.3; 
    }
    50% { 
        transform: translate(20px, -20px) rotate(180deg); 
        opacity: 0.6; 
    }
}

/* Bounce Scroll Indicator */
@keyframes bounce-scroll {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Bounce Animation */
@keyframes bounce-animation {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-20px); }
    60% { transform: translateY(-10px); }
}

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

/* Pulse Glow */
@keyframes pulse-glow {
    0%, 100% { 
        opacity: 0.3; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(1.05);
    }
}

/* Icon Pulse */
@keyframes icon-pulse {
    0%, 100% { 
        transform: scale(1); 
        filter: brightness(1); 
    }
    50% { 
        transform: scale(1.1); 
        filter: brightness(1.2); 
    }
}

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

/* Fade In */
@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Slide In Up */
@keyframes slide-in-up {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slide In Left */
@keyframes slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide In Right */
@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale In */
@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Flip In */
@keyframes flip-in {
    from {
        opacity: 0;
        transform: rotateY(-90deg);
    }
    to {
        opacity: 1;
        transform: rotateY(0);
    }
}

/* Draw Line (for SVG stroke) */
@keyframes draw-line {
    to {
        stroke-dashoffset: 0;
    }
}

/* Blob Morph */
@keyframes blob-morph {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    25% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
    50% {
        border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%;
    }
    75% {
        border-radius: 60% 40% 60% 40% / 70% 30% 50% 60%;
    }
}

/* ============================================
   UTILITY ANIMATION CLASSES
   ============================================ */

/* Hover Lift */
.hover-lift {
    transition: transform var(--timing-fast) var(--ease-smooth),
                box-shadow var(--timing-fast) var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(var(--lift-distance));
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

/* Hover Glow */
.hover-glow {
    transition: box-shadow var(--timing-fast) var(--ease-smooth);
}

.hover-glow:hover {
    box-shadow: 0 0 20px var(--glow-primary);
}

/* Hover Scale */
.hover-scale {
    transition: transform var(--timing-fast) var(--ease-smooth);
}

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

/* Hover Rotate */
.hover-rotate {
    transition: transform var(--timing-medium) var(--ease-smooth);
}

.hover-rotate:hover {
    transform: rotate(5deg);
}

/* Hover Tilt 3D */
.hover-tilt {
    transition: transform var(--timing-medium) var(--ease-smooth);
}

.hover-tilt:hover {
    transform: perspective(1000px) rotateX(2deg) rotateY(-2deg);
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Animated Gradient Text */
.gradient-text-animated {
    background: linear-gradient(
        45deg,
        var(--primary-color) 0%,
        var(--secondary-color) 25%,
        var(--primary-color) 50%,
        var(--secondary-color) 75%,
        var(--primary-color) 100%
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease infinite;
}

/* Shimmer Text */
.shimmer-text {
    background: linear-gradient(
        90deg,
        var(--secondary-color) 0%,
        var(--primary-color) 50%,
        var(--secondary-color) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: text-shimmer 3s linear infinite;
}

/* Pulsing Background */
.pulse-bg {
    animation: pulse-glow 3s ease-in-out infinite;
}

/* ============================================
   STAGGER DELAY UTILITIES
   ============================================ */

[data-delay="0"] { transition-delay: 0s !important; animation-delay: 0s !important; }
[data-delay="0.1"] { transition-delay: 0.1s !important; animation-delay: 0.1s !important; }
[data-delay="0.2"] { transition-delay: 0.2s !important; animation-delay: 0.2s !important; }
[data-delay="0.3"] { transition-delay: 0.3s !important; animation-delay: 0.3s !important; }
[data-delay="0.4"] { transition-delay: 0.4s !important; animation-delay: 0.4s !important; }
[data-delay="0.5"] { transition-delay: 0.5s !important; animation-delay: 0.5s !important; }
[data-delay="0.6"] { transition-delay: 0.6s !important; animation-delay: 0.6s !important; }
[data-delay="0.8"] { transition-delay: 0.8s !important; animation-delay: 0.8s !important; }
[data-delay="1"] { transition-delay: 1s !important; animation-delay: 1s !important; }

/* ============================================
   PERFORMANCE OPTIMIZATION
   ============================================ */

/* Will Change for Animated Elements */
.will-animate {
    will-change: transform, opacity;
}

/* ============================================
   ACCESSIBILITY - REDUCED MOTION
   ============================================ */

@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;
    }
    
    [data-scroll-reveal] {
        opacity: 1 !important;
        transform: none !important;
    }
}