@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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


@keyframes bookOpen {
    0% {
        transform: rotateY(0deg) translateZ(0);
        transform-origin: left;
    }
    50% {
        transform: rotateY(-30deg) translateZ(100px);
        transform-origin: left;
    }
    100% {
        transform: rotateY(0deg) translateZ(0);
        transform-origin: left;
    }
}

.book-cover {
    margin: 2rem auto;
    perspective: 1000px; /* For 3D effect */
}

.book-cover-inner {
    position: relative;
    transform-style: preserve-3d;
    animation: bookOpen 2s ease-in-out;
}

.book-cover img {
    max-width: 300px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.2),
        -2px 0 5px rgba(0, 0, 0, 0.1);
    backface-visibility: hidden;
}

/* Add page effect */
.book-cover-inner::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 95%, rgba(0,0,0,0.1) 100%);
    transform: rotateY(180deg);
    backface-visibility: hidden;
}

/* Add spine shadow */
.book-cover-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: rgba(0,0,0,0.1);
    transform: rotateY(-90deg);
    transform-origin: left;
}

/* Add hover effect */
.book-cover:hover .book-cover-inner {
    animation: bookOpen 2s ease-in-out;
}

@keyframes fogFlow {
    0% { 
        opacity: 0.3;
        transform: translateX(0);
    }
    50% { 
        opacity: 0.6;
        transform: translateX(20px);
    }
    100% { 
        opacity: 0.3;
        transform: translateX(0);
    }
}

.fog-effect {
    animation: fogFlow 8s infinite;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.point-info-window {
    animation: slideIn 0.3s ease-out;
}