body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f0f0f0; 
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
  width: 100%;
  height: 100vh;
}

.contact-box {
  max-width: 750px;
  height: 550px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  background-color: #fff;
  box-shadow: 0 0 19px 5px rgba(0,0,0,0.19);
  border-radius: 20px;
  overflow: hidden;
}

.flip-card { 
  background-color: transparent;
  width: 100%;
  height: 450px;
  perspective: 1000px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 111%;
  text-align: center;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.flip-card:hover 
.flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, 
.flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden; 
}

.flip-card-front {
  background: url('book_cover.jpg') no-repeat center center;
  background-size: cover;
  height: 100%;
  color: white; 
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid #ddd;
}

.flip-card-back {
  background: url('back.webp') no-repeat center center;
  background-size: cover;
  transform: rotateY(180deg);
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Medium devices (tablets) */
@media (min-width: 768px) {
  .flip-card-front{
    background-image: url('book_cover.jpg');
  }
}

@media (min-width: 768px) {
  .flip-card-back{
    background-image: url('back.webp');
  }
}

/* Large devices (desktops) */
@media (min-width: 1024px) {
  .flip-card-front {
    background-image: url('book_cover.jpg');
  }
}

@media (min-width: 1024px) {
  .flip-card-back{
    background-image: url('back.webp');
  }
}

.right {
  padding: 5px 40px;
  height: 100%;
}

h1{
  font-size: 1.7rem;
  margin-bottom: 0;
}

.rating-container {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 1.25rem;
  margin: 2px 0;
}

.rating-title {
  font-weight: bold;
}

.rating-value {
  font-weight: bold;
  color: #e5a00d; /* Gold color for the rating value */
}

.user-stars {
  color: #e5a00d; /* Gold color for the stars */
}

.rating{
  font-size: 0.9rem;
  color: grey;
}

.rate{
  margin-right: 20px;
}

.rate:hover, .review:hover{
  color: #ddb909;
}

.book-brief {
  font-size: 1rem;
  border: 1px solid;
  border-radius: 5px;
  padding: 5px;
}

.book-detail{
  border:1px dotted;
  border-radius: 5px;
  background-color:rgb(71, 126, 128);
  padding: 5px;
  cursor: pointer;
}

.user-rates{
  font-size: 1.15rem;
}
.stars{
  display:inline;
  font-size: 1.6rem;
  color: #e5a00d;
}

.submit{
  margin: 5px;
  font-size: 1.35rem;
  background-color: #0d5e67;
  color: #fff;
  border-radius: 13px;
  padding: 5px;
}

.submit:hover{
  background-color:#fff;
  color: #000;
}