/* ====================================
   Animations & Transitions CSS
   ==================================== */

/* ===== Fade In Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Scale Animations ===== */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes scaleUp {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.05);
    }
}

/* ===== Slide Animations ===== */
@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;
    }
}

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

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

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

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-200deg) scale(0.5);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

/* ===== Pulse Animations ===== */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
    }
    50% {
        box-shadow: 0 0 0 20px rgba(99, 102, 241, 0);
    }
}

/* ===== Wave Animations ===== */
@keyframes wave {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    25% {
        transform: translateY(-10px) translateX(5px);
    }
    50% {
        transform: translateY(0) translateX(10px);
    }
    75% {
        transform: translateY(-10px) translateX(5px);
    }
}

/* ===== Shimmer Animation ===== */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

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

.animated-gradient {
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

/* ===== Typing Animation ===== */
@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

/* ===== Float Animation ===== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes floatSlow {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(5deg);
    }
}

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

/* ===== Swing Animation ===== */
@keyframes swing {
    20% {
        transform: rotate(15deg);
    }
    40% {
        transform: rotate(-10deg);
    }
    60% {
        transform: rotate(5deg);
    }
    80% {
        transform: rotate(-5deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

/* ===== Flip Animation ===== */
@keyframes flip {
    from {
        transform: perspective(400px) rotateY(0);
    }
    to {
        transform: perspective(400px) rotateY(360deg);
    }
}

@keyframes flipInX {
    from {
        transform: perspective(400px) rotateX(-90deg);
        opacity: 0;
    }
    to {
        transform: perspective(400px) rotateX(0);
        opacity: 1;
    }
}

@keyframes flipInY {
    from {
        transform: perspective(400px) rotateY(-90deg);
        opacity: 0;
    }
    to {
        transform: perspective(400px) rotateY(0);
        opacity: 1;
    }
}

/* ===== Zoom Animation ===== */
@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale3d(0.3, 0.3, 0.3);
    }
    50% {
        opacity: 1;
    }
}

@keyframes zoomOut {
    from {
        opacity: 1;
    }
    50% {
        opacity: 0;
        transform: scale3d(0.3, 0.3, 0.3);
    }
    to {
        opacity: 0;
    }
}

/* ===== Blur Animations ===== */
@keyframes blurIn {
    from {
        filter: blur(10px);
        opacity: 0;
    }
    to {
        filter: blur(0);
        opacity: 1;
    }
}

/* ===== Glow Animation ===== */
@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(99, 102, 241, 0.5),
                    0 0 10px rgba(99, 102, 241, 0.5),
                    0 0 15px rgba(99, 102, 241, 0.5);
    }
    50% {
        box-shadow: 0 0 10px rgba(99, 102, 241, 0.8),
                    0 0 20px rgba(99, 102, 241, 0.8),
                    0 0 30px rgba(99, 102, 241, 0.8);
    }
}

/* ===== Slide & Fade Animations ===== */
@keyframes slideFadeIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideFadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-50px);
    }
}

/* ===== Utility Animation Classes ===== */
.fade-in {
    animation: fadeIn 0.8s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-down {
    animation: fadeInDown 0.8s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.8s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.8s ease-out;
}

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

.bounce-in {
    animation: bounceIn 0.8s ease-out;
}

.rotate-in {
    animation: rotateIn 0.6s ease-out;
}

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

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

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

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

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

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

.swing {
    animation: swing 1s ease-in-out;
}

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

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

.hover-lift:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.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-brightness {
    transition: filter 0.3s ease;
}

.hover-brightness:hover {
    filter: brightness(1.2);
}

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

.hover-shadow:hover {
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.hover-glow:hover {
    animation: glow 1.5s ease-in-out infinite;
}

/* ===== Scroll Reveal Animations ===== */
[data-scroll] {
    opacity: 0;
    transition: all 0.8s ease-out;
}

[data-scroll].revealed {
    opacity: 1;
}

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

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

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

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

[data-scroll="scale"].revealed {
    transform: scale(1);
}

/* ===== Loading Animations ===== */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.spinner {
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-top: 3px solid #6366f1;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

/* ===== Text Animations ===== */
@keyframes textGlow {
    0%, 100% {
        text-shadow: 0 0 10px rgba(99, 102, 241, 0.5),
                     0 0 20px rgba(99, 102, 241, 0.3);
    }
    50% {
        text-shadow: 0 0 20px rgba(99, 102, 241, 0.8),
                     0 0 30px rgba(99, 102, 241, 0.5),
                     0 0 40px rgba(99, 102, 241, 0.3);
    }
}

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

/* ===== Stagger Animation Delays ===== */
.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; }
.stagger-6 { animation-delay: 0.6s; }

/* ===== Transition Utilities ===== */
.transition-fast {
    transition: all 0.2s ease;
}

.transition-medium {
    transition: all 0.3s ease;
}

.transition-slow {
    transition: all 0.5s ease;
}

/* ===== Book Flip Animations ===== */
/* Отключено переворачивание страниц вокруг оси */
/* @keyframes bookPageFlip {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(-180deg);
    }
}

@keyframes bookPageFlipRight {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(180deg);
    }
} */

@keyframes bookGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.3),
                    0 0 40px rgba(99, 102, 241, 0.2),
                    inset 0 0 60px rgba(255, 255, 255, 0.05);
    }
    50% {
        box-shadow: 0 0 40px rgba(99, 102, 241, 0.5),
                    0 0 80px rgba(99, 102, 241, 0.3),
                    inset 0 0 80px rgba(255, 255, 255, 0.08);
    }
}

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

.book-page .page-front::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: pageShimmer 3s infinite;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.book-page:hover .page-front::after {
    opacity: 1;
}

/* ===== Smooth Performance ===== */
.gpu-accelerated {
    transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* ===== Reduce Motion for Accessibility ===== */
@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;
    }
}