/* 3D Book Styles - Adapted for Mi Corazón Expuesto */
#book-3d {
    width: 378px;
    margin: 0 auto;
    position: relative;
    -webkit-transition-duration: .5s;
    -moz-transition-duration: .5s;
    -ms-transition-duration: .5s;
    -o-transition-duration: .5s;
    transition-duration: .5s;
    -webkit-perspective: 2000px;
    -moz-perspective: 2000px;
    -ms-perspective: 2000px;
    -o-perspective: 2000px;
    perspective: 2000px;
}

.main {
    width: 378px;
    height: 640px;
    color: #92684F;
    position: relative;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition-duration: .5s;
    -moz-transition-duration: .5s;
    -ms-transition-duration: .5s;
    -o-transition-duration: .5s;
    transition-duration: .5s;
    -webkit-transform: rotate3d(0,1,0,-15deg);
    -moz-transform: rotate3d(0,1,0,-15deg);
    -ms-transform: rotate3d(0,1,0,-15deg);
    -o-transform: rotate3d(0,1,0,-15deg);
    transform: rotate3d(0,1,0,-15deg);
}

/* Book Font */
.book-font {
    width: 378px;
    height: 640px;
    position: absolute;
    top: 0;
    bottom: 0;
    font-size: 15px;
    text-align: center;
    text-shadow: 0 2px 0 rgba(30,35,45,1);
    box-shadow: inset 3px 0 10px rgba(0,0,0,0.1);
    z-index: 10;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transform-origin: 0% 50%;
    -moz-transform-origin: 0% 50%;
    -ms-transform-origin: 0% 50%;
    -o-transform-origin: 0% 50%;
    transform-origin: 0% 50%;
    -webkit-transition-duration: .5s;
    -moz-transition-duration: .5s;
    -ms-transition-duration: .5s;
    -o-transition-duration: .5s;
    transition-duration: .5s;
    -webkit-transform: translate3d(0,0,27px);
    -moz-transform: translate3d(0,0,27px);
    -ms-transform: translate3d(0,0,27px);
    -o-transform: translate3d(0,0,27px);
    transform: translate3d(0,0,27px);
}

.book-cover {
    width: 378px;
    height: 640px;
    overflow: hidden;
    position: absolute;
    top: 0;
    bottom: 0;
    background: url('portada.png') no-repeat center center / cover;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    backface-visibility: hidden;
}

.book-cover-back {
    width: 378px;
    height: 640px;
    position: absolute;
    top: 0;
    bottom: 0;
    background: url('contra-portada.png') no-repeat center center / cover;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-transform: rotate3d(0,1,0,-180deg);
    -moz-transform: rotate3d(0,1,0,-180deg);
    -ms-transform: rotate3d(0,1,0,-180deg);
    -o-transform: rotate3d(0,1,0,-180deg);
    transform: rotate3d(0,1,0,-180deg);
}

.title {
    margin: 60px 0 20px 0;
    height: 32px;
    font-size: 28px;
    color: white;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    background: rgba(0,0,0,0.3);
    padding: 10px;
    border-radius: 5px;
}

.author {
    height: 18px;
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
    background: rgba(0,0,0,0.3);
    padding: 5px 10px;
    border-radius: 3px;
    display: inline-block;
}

.publisher {
    width: 100%;
    position: absolute;
    bottom: 22px;
    color: rgba(255,255,255,0.9);
    font-size: 14px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
    background: rgba(0,0,0,0.3);
    padding: 5px;
    border-radius: 3px;
}

/* Book Page */
.book-page {
    width: 371px;
    height: 626px;
    line-height: 18px;
    position: absolute;
    top: 5px;
    z-index: 9;
    box-shadow: inset 3px 0 10px rgba(0,0,0,0.1);
    background: #EEEFE9;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition-duration: .5s;
    -moz-transition-duration: .5s;
    -ms-transition-duration: .5s;
    -o-transition-duration: .5s;
    transition-duration: .5s;
    -webkit-transform: translate3d(0,0,25px);
    -moz-transform: translate3d(0,0,25px);
    -ms-transform: translate3d(0,0,25px);
    -o-transform: translate3d(0,0,25px);
    transform: translate3d(0,0,25px);
}

.page {
    height: 560px;
    margin: 33px 40px;
    overflow: hidden;
    color: #333;
}

.book-page h3 {
    font-size: 16px;
    text-align: center;
    margin-bottom: 14px;
    color: #2c3e50;
}

.book-page p {
    font-size: 12px;
    margin-bottom: 12px;
    text-align: justify;
}

.page-number {
    width: 100%;
    font-size: 12px;
    text-align: center;
    position: absolute;
    bottom: 10px;
    color: #666;
}

/* Book Back */
.book-back {
    width: 378px;
    height: 640px;
    background: url('back.png') no-repeat center center / cover;
    position: absolute;
    top: 0;
    bottom: 0;
    color: white;
    -webkit-transform: rotate3d(0,1,0,-180deg) translate3d(0,0,27px);
    -moz-transform: rotate3d(0,1,0,-180deg) translate3d(0,0,27px);
    -ms-transform: rotate3d(0,1,0,-180deg) translate3d(0,0,27px);
    -o-transform: rotate3d(0,1,0,-180deg) translate3d(0,0,27px);
    transform: rotate3d(0,1,0,-180deg) translate3d(0,0,27px);
    z-index: 8;
}



.txt-right {
    text-align: right;
}

/* Book Bone */
.book-bone {
    width: 53px;
    background: url('lomo.png') no-repeat center center / cover;
    box-shadow: 1px 0 0 #29303A, -1px 0 0 #29303A;
    position: absolute;
    top: 0;
    bottom: 0;
    left: -27px;
    -webkit-transform: rotate3d(0,1,0,-90deg);
    -moz-transform: rotate3d(0,1,0,-90deg);
    -ms-transform: rotate3d(0,1,0,-90deg);
    -o-transform: rotate3d(0,1,0,-90deg);
    transform: rotate3d(0,1,0,-90deg);
}

.book-bone h2 {
    width: 613px;
    height: 53px;
    line-height: 53px;
    font-size: 12px;
    text-align: right;
    padding: 0 15px;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    background: rgba(0,0,0,0.3);
    -webkit-transform-origin: 0 0;
    -moz-transform-origin: 0 0;
    -ms-transform-origin: 0 0;
    -o-transform-origin: 0 0;
    transform-origin: 0 0;
    -webkit-transform: rotate(90deg) translateY(-40px);
    -moz-transform: rotate(90deg) translateY(-40px);
    -ms-transform: rotate(90deg) translateY(-40px);
    -o-transform: rotate(90deg) translateY(-40px);
    transform: rotate(90deg) translateY(-53px);
}

/* Other sides */
.book-cover:after, .book-back:after {
    content: "";
    width: 3px;
    position: absolute;
    top: 0;
    left: 8px;
    bottom: 0;
    background: rgba(0,0,0,0.06);
    box-shadow: 1px 0 3px rgba(255, 255, 255, 0.1);
}

.book-right {
    width: 53px;
    height: 626px;
    background: #EEEFE9;
    position: absolute;
    top: 5px;
    right: -20px;
    box-shadow: 0 1px 0 #EEEFE9, 0 -1px 0 #EEEFE9;
    -webkit-transform: rotate3d(0,1,0,90deg);
    -moz-transform: rotate3d(0,1,0,90deg);
    -ms-transform: rotate3d(0,1,0,90deg);
    -o-transform: rotate3d(0,1,0,90deg);
    transform: rotate3d(0,1,0,90deg);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    backface-visibility: hidden;
}

.book-top {
    width: 371px;
    height: 53px;
    background: #EEEFE9;
    position: absolute;
    top: -20px;
    left: 0;
    -webkit-transform: rotate3d(1,0,0,90deg);
    -moz-transform: rotate3d(1,0,0,90deg);
    -ms-transform: rotate3d(1,0,0,90deg);
    -o-transform: rotate3d(1,0,0,90deg);
    transform: rotate3d(1,0,0,90deg);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    backface-visibility: hidden;
}

.book-bottom {
    width: 371px;
    height: 53px;
    background: #EEEFE9;
    position: absolute;
    bottom: -20px;
    left: 0;
    -webkit-transform: rotate3d(1,0,0,-90deg);
    -moz-transform: rotate3d(1,0,0,-90deg);
    -ms-transform: rotate3d(1,0,0,-90deg);
    -o-transform: rotate3d(1,0,0,-90deg);
    transform: rotate3d(1,0,0,-90deg);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Hover Effects */
.view-cover:hover .main {
    -webkit-transform: rotate3d(0,1,0,-40deg);
    -moz-transform: rotate3d(0,1,0,-40deg);
    -ms-transform: rotate3d(0,1,0,-40deg);
    -o-transform: rotate3d(0,1,0,-40deg);
    transform: rotate3d(0,1,0,-40deg);
}

/* Additional View States */
.view-back .main {
    -webkit-transform: rotate3d(0,1,0,180deg);
    -moz-transform: rotate3d(0,1,0,180deg);
    -ms-transform: rotate3d(0,1,0,180deg);
    -o-transform: rotate3d(0,1,0,180deg);
    transform: rotate3d(0,1,0,180deg);
}

.view-back:hover .main {
    -webkit-transform: rotate3d(0,1,0,140deg);
    -moz-transform: rotate3d(0,1,0,140deg);
    -ms-transform: rotate3d(0,1,0,140deg);
    -o-transform: rotate3d(0,1,0,140deg);
    transform: rotate3d(0,1,0,140deg);
}

.open-book {
    -webkit-transform: translate3d(25%,0,0);
    -moz-transform: translate3d(25%,0,0);
    -ms-transform: translate3d(25%,0,0);
    -o-transform: translate3d(25%,0,0);
    transform: translate3d(25%,0,0);
}

.open-book .book-font {
    -webkit-transform: translate3d(0,0,20px) rotate3d(0,1,0,-160deg);
    -moz-transform: translate3d(0,0,20px) rotate3d(0,1,0,-160deg);
    -ms-transform: translate3d(0,0,20px) rotate3d(0,1,0,-160deg);
    -o-transform: translate3d(0,0,20px) rotate3d(0,1,0,-160deg);
    transform: translate3d(0,0,20px) rotate3d(0,1,0,-160deg);
}

.view-rotate .main {
    -webkit-transition-duration: 3s;
    -moz-transition-duration: 3s;
    -ms-transition-duration: 3s;
    -o-transition-duration: 3s;
    transition-duration: 3s;
    -webkit-transform: rotate3d(0,1,0,360deg);
    -moz-transform: rotate3d(0,1,0,360deg);
    -ms-transform: rotate3d(0,1,0,360deg);
    -o-transform: rotate3d(0,1,0,360deg);
    transform: rotate3d(0,1,0,360deg);
}

/* Book Controls */
#book-controls {
    z-index: 20;
}

#book-controls .btn {
    width: 40px;
    height: 40px;
    margin-bottom: 5px;
    border: 1px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

#book-controls .btn:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.5);
    transform: scale(1.1);
}

#book-controls .btn.active {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.7);
}

/* Navbar scroll effect */
.navbar-scrolled {
    background-color: #212529 !important;
    transition: background-color 0.3s ease;
}

/* Book interaction */
#book-3d {
    cursor: pointer;
    user-select: none;
}

#book-3d:hover .main {
    transform: rotate3d(0,1,0,-15deg) scale3d(0.95, 0.95, 0.95);
}

.view-cover:hover .main {
    transform: rotate3d(0,1,0,-40deg) scale3d(0.95, 0.95, 0.95);
}

.view-back:hover .main {
    transform: rotate3d(0,1,0,140deg) scale3d(0.95, 0.95, 0.95);
}

.open-book:hover .main {
    transform: rotate3d(1,1,0,15deg) scale3d(0.95, 0.95, 0.95);
}

/* Responsive */
@media (max-width: 768px) {
    #book-3d {
        width: 213px;
    }
    
    .main {
        width: 213px;
        height: 360px;
    }
    
    .book-font, .book-cover, .book-cover-back {
        width: 213px;
        height: 360px;
    }
    
    .book-cover {
        background: url('portada.png') no-repeat center center / cover;
    }
    
    .book-cover-back {
        background: url('contra-portada.png') no-repeat center center / cover;
    }
    
    .book-page {
        width: 208px;
        height: 350px;
    }
    
    .page {
        height: 310px;
        margin: 20px 25px;
    }
    
    .book-back {
        width: 213px;
        height: 360px;
        background: url('back.png') no-repeat center center / cover;
    }
    
    .book-right {
        height: 350px;
    }
    
    .book-top, .book-bottom {
        width: 208px;
    }
    
    .book-bone h2 {
        width: 340px;
    }
    
    .title {
        font-size: 20px;
        margin: 40px 0 12px 0;
    }
    
    .author {
        font-size: 14px;
    }
    
    .publisher {
        font-size: 12px;
    }
    
    #book-controls {
        top: 10px !important;
        right: 10px !important;
    }
    
    #book-controls .btn {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
}
/* Footer Heart Animation */
.heart-container {
    position: absolute;
    top: -49px;
    left: 20%;
}

.heart-animation {
    width: 77px;
    height: auto;
    animation: heartbeat 1.2s ease-in-out infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.05); }
    28% { transform: scale(1); }
    42% { transform: scale(1.05); }
    70% { transform: scale(1); }
}

/* Responsive Heart */
@media (max-width: 768px) {
    .heart-container {
        top: -35px;
        left: 15%;
    }
    
    .heart-animation {
        width: 55px;
    }
}

@media (max-width: 480px) {
    .heart-container {
        top: -30px;
        left: 10%;
    }
    
    .heart-animation {
        width: 45px;
    }
}