/* ============================================
   ANIMATIONS & TRANSITIONS
   AI News 2026 Motion Design
   ============================================ */

/* ============================================
   KEYFRAMES
   ============================================ */

/* Fade In Up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Left */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Fade In Right */
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale In */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

/* Glow Pulse */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 
            0 10px 40px rgba(0, 0, 0, 0.4),
            0 0 20px rgba(123, 47, 255, 0.2);
    }
    50% {
        box-shadow: 
            0 10px 40px rgba(0, 0, 0, 0.4),
            0 0 40px rgba(123, 47, 255, 0.4);
    }
}

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

/* Slide Up */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slide Down */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* Gradient Shift */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.animate-scale-in {
    animation: scaleIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

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

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

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

/* Stagger delays for lists/grids */
.delay-1 { animation-delay: 0.05s; }
.delay-2 { animation-delay: 0.1s; }
.delay-3 { animation-delay: 0.15s; }
.delay-4 { animation-delay: 0.2s; }
.delay-5 { animation-delay: 0.25s; }
.delay-6 { animation-delay: 0.3s; }
.delay-7 { animation-delay: 0.35s; }
.delay-8 { animation-delay: 0.4s; }

/* ============================================
   SCROLL-TRIGGERED ANIMATIONS
   ============================================ */

.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   LOADING STATES
   ============================================ */

/* Skeleton Loader */
.skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.03) 0%,
        rgba(255, 255, 255, 0.08) 50%,
        rgba(255, 255, 255, 0.03) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 16px;
    margin-bottom: 8px;
}

.skeleton-title {
    height: 24px;
    width: 80%;
    margin-bottom: 12px;
}

.skeleton-image {
    height: 200px;
    width: 100%;
    margin-bottom: 16px;
}

/* ============================================
   BUTTON ANIMATIONS
   ============================================ */

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.5s ease;
}

.btn-glow:hover::before {
    left: 100%;
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.ripple:active::after {
    width: 300px;
    height: 300px;
}

/* ============================================
   TEXT ANIMATIONS
   ============================================ */

/* Gradient Text Animation */
.text-gradient-animated {
    background: linear-gradient(
        90deg,
        var(--color-accent-cyan),
        var(--color-accent-purple),
        var(--color-accent-pink),
        var(--color-accent-cyan)
    );
    background-size: 300% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease infinite;
}

/* Typewriter Effect */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--color-accent-cyan);
    white-space: nowrap;
    animation: typing 3.5s steps(40, end), blink 0.75s step-end infinite;
}

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

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

/* ============================================
   CARD HOVER EFFECTS
   ============================================ */

/* Lift Effect */
.card-lift {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Glow Border */
.card-glow-border {
    position: relative;
}

.card-glow-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 2px;
    background: linear-gradient(
        135deg,
        var(--color-accent-cyan),
        var(--color-accent-purple)
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card-glow-border:hover::before {
    opacity: 1;
}

/* Image Zoom on Card Hover */
.card-image-zoom {
    overflow: hidden;
}

.card-image-zoom img {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-image-zoom:hover img {
    transform: scale(1.1);
}

/* ============================================
   PAGE TRANSITIONS
   ============================================ */

.page-transition {
    animation: fadeInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   MICRO-INTERACTIONS
   ============================================ */

/* Icon Bounce */
.icon-bounce {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.icon-bounce:hover {
    transform: scale(1.2) rotate(10deg);
}

/* Underline Slide */
.underline-slide {
    position: relative;
    display: inline-block;
}

.underline-slide::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.underline-slide:hover::after {
    width: 100%;
}

/* ============================================
   NOTIFICATIONS & TOASTS
   ============================================ */

.toast-enter {
    transform: translateX(100%);
    opacity: 0;
}

.toast-enter-active {
    transform: translateX(0);
    opacity: 1;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-exit {
    transform: translateX(100%);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   PROGRESS INDICATORS
   ============================================ */

/* Progress Bar Animation */
.progress-bar {
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: shimmer 2s infinite;
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .reveal-on-scroll {
        opacity: 1;
        transform: none;
    }
}

/* ============================================
   PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* GPU Acceleration for animations */
.animate-fade-in-up,
.animate-fade-in-down,
.animate-fade-in-left,
.animate-fade-in-right,
.animate-scale-in,
.reveal-on-scroll {
    will-change: transform, opacity;
}

/* Remove will-change after animation */
.animate-fade-in-up:not(:running),
.animate-fade-in-down:not(:running),
.animate-fade-in-left:not(:running),
.animate-fade-in-right:not(:running),
.animate-scale-in:not(:running),
.reveal-on-scroll.is-visible {
    will-change: auto;
}