/*
===============================================
ANIMATIONS CSS - Interactive Effects & Transitions
Professional Portfolio by Chinmoy Kumar Biswas
Version: 2.0.0 - Clean Build
===============================================
*/

/* ===== INTERSECTION OBSERVER ANIMATIONS ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animate {
    opacity: 1;
    transform: translateY(0);
}

/* Reveal animations */
.reveal-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 500ms ease, transform 600ms cubic-bezier(0.2, 0.65, 0.2, 1);
}

.reveal-up.is-visible {
    opacity: 1;
    transform: none;
}

.reveal-fade {
    opacity: 0;
    transition: opacity 600ms ease;
}

.reveal-fade.is-visible {
    opacity: 1;
}

/* Delay variations */
.reveal-up.delay-1 {
    transition-delay: 100ms;
}

.reveal-up.delay-2 {
    transition-delay: 200ms;
}

.reveal-up.delay-3 {
    transition-delay: 300ms;
}

.reveal-up.delay-4 {
    transition-delay: 400ms;
}

/* ===== SLIDE ANIMATIONS ===== */
.slide-up {
    transform: translateY(50px);
    opacity: 0;
    transition: all 0.6s ease;
}

.slide-up.is-visible {
    transform: translateY(0);
    opacity: 1;
}

.slide-down {
    transform: translateY(-50px);
    opacity: 0;
    transition: all 0.6s ease;
}

.slide-down.is-visible {
    transform: translateY(0);
    opacity: 1;
}

.slide-left {
    transform: translateX(50px);
    opacity: 0;
    transition: all 0.6s ease;
}

.slide-left.is-visible {
    transform: translateX(0);
    opacity: 1;
}

.slide-right {
    transform: translateX(-50px);
    opacity: 0;
    transition: all 0.6s ease;
}

.slide-right.is-visible {
    transform: translateX(0);
    opacity: 1;
}

/* ===== SCALE ANIMATIONS ===== */
.scale-in {
    transform: scale(0.8);
    opacity: 0;
    transition: all 0.5s ease;
}

.scale-in.is-visible {
    transform: scale(1);
    opacity: 1;
}

/* ===== KEYFRAME ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -30px, 0);
    }
    70% {
        transform: translate3d(0, -15px, 0);
    }
    90% {
        transform: translate3d(0, -4px, 0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-10px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(10px);
    }
}

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

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(0, 245, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 245, 255, 0.6);
    }
}

@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 50% {
        border-color: transparent;
    }
    51%, 100% {
        border-color: var(--primary-color);
    }
}

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

/* ===== UTILITY ANIMATION CLASSES ===== */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.fade-out {
    animation: fadeOut 0.5s ease-out;
}

.slide-in-up {
    animation: slideInUp 0.6s ease-out;
}

.slide-in-down {
    animation: slideInDown 0.6s ease-out;
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

.scale-in-animation {
    animation: scaleIn 0.5s ease-out;
}

.bounce-animation {
    animation: bounce 1s ease;
}

.pulse-animation {
    animation: pulse 2s infinite;
}

.shake-animation {
    animation: shake 0.5s ease-in-out;
}

.spin-animation {
    animation: spin 1s linear infinite;
}

.float-animation {
    animation: float 3s ease-in-out infinite;
}

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

.gradient-animation {
    background: linear-gradient(-45deg, var(--primary-color), var(--secondary-color), var(--accent-color), var(--primary-color));
    background-size: 400% 400%;
    animation: gradient 4s ease infinite;
}

/* ===== HOVER EFFECTS ===== */
.hover-lift {
    transition: transform 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
}

.hover-scale {
    transition: transform 0.3s ease;
}

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

.hover-rotate {
    transition: transform 0.3s ease;
}

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

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.4);
}

/* ===== LOADING ANIMATIONS ===== */
.loading-spinner {
    animation: spin 1s linear infinite;
}

.loading-pulse {
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-dots::after {
    content: '';
    animation: blink 1s infinite;
}

/* ===== TEXT ANIMATIONS ===== */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    animation: typing 3s steps(40, end), blink 0.75s step-end infinite;
}

/* ===== SCROLL-TRIGGERED ANIMATIONS ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease;
}

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

.scroll-reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s ease;
}

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

.scroll-reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s ease;
}

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

/* ===== RESPONSIVE MOTION 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;
    }
    
    .animate-on-scroll,
    .reveal-up,
    .reveal-fade,
    .slide-up,
    .slide-down,
    .slide-left,
    .slide-right,
    .scale-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

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

.will-animate {
    will-change: transform, opacity;
}