/* Book Effect */

.bookarea {
  padding-top: 80px;
  padding-bottom: 80px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: -1;
}

.book {
    position: relative;
    width: 25vw;
    height: 36vw;
    max-width: 350px;
    max-height: 500px;
    transition: transform 0.5s;
}

.paper {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    perspective: 1500px;
}

#rotationIcon {    
    color:whitesmoke;
    font-size: 50px;
    transition: transform 1s ease;
}

.rotation {
    margin-top: 50px;
    display: none;
    flex-direction: column;
    align-items: center;
}


.front,
.back {
    background-color: white;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    transform-origin: left;
    transition: transform 0.5s;
}

.front {
    z-index: 1;
    backface-visibility: hidden;
    border-left: 3px solid powderblue;
}

.back {
    z-index: 0;
}

.front-content,
.back-content {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.back-content {
    transform: rotateY(180deg)
}

/* Paper flip effect */
.flipped .front,
.flipped .back {
    transform: rotateY(-180deg);
}

/* Controller Buttons */
button {
    border: none;
    background-color: rgba(0, 0, 0, 0);
    cursor: pointer;
    margin: 10px;
    transition: transform 0.5s;
}

button:focus {
    outline: none;
}

button:hover i {
    color: #636363;
}

i {
    font-size: 20px;
    color: gray;
}

#close-btn {
    display:none;
}