* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&family=Open+Sans:ital,wght@0,300..800;1,300..800&family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap");

body {
  font-family: "Open Sans", sans-serif;
}

header {
  background-color: #139aa6;
  /* height: 600px; */
  display: flex;
  padding: 80px 16px;
}

.header-book {
  /* background-color: #fff; */
  width: 100%;
  display: flex;
  justify-content: center;
  /* padding: 0 auto; */
}

.header-book-div {
  max-width: 80%;
  display: flex;
  gap: 40px;
}

.header-content,
.header-img {
  flex: 1;
}

.header-content {
  /* background-color: rgb(214, 182, 52); */
  display: flex;
  flex-direction: column;
}

.header-content h1 {
  font-size: 60px;
  font-family: "Montserrat", sans-serif;
  color: white;
  margin-bottom: 24px;
  line-height: 1.05; /* ↓ nén dòng (mặc định thường ~1.2) */
  letter-spacing: -0.02em;
  font-weight: 900;
}

.header-content p {
  font-size: 20px;
  margin-bottom: 32px;
  line-height: 1.4;
  text-align: left;
  color: white;
}

.header-btn {
  display: flex;
  gap: 30px;
}

.header-btn button {
  justify-content: center;
  align-items: center;
}

.header-buy-book {
  color: white;
  background-color: black;
  border: none;
  padding: 10px 15px;
  border-radius: 5px;
  font-size: 17px;
  display: flex;
  gap: 6px;
}

.header-view-collection {
  color: white;
  background-color: #139aa6;
  border: 1px solid white;
  padding: 10px 26px;
  border-radius: 5px;
  font-size: 17px;
  transition: ease 0.3s;
  display: flex;
  /* padding: 10px 15px; */
  gap: 6px;
}

.header-buy-book:hover {
  background-color: rgba(10, 10, 10, 0.9);
}

.header-view-collection:hover {
  background-color: white;
  color: #139aa6;
  /* transition: background-color 0.3s ease; */
}

/*  */

.header-img {
  /* background-color: pink; */
  margin: auto;
}

.header-img-detail {
  /* background-color: black; */
  display: flex;
  gap: 25px;
  /* height: 275px; */
  /* aspect-ratio: 1 / 1; */
  /* height: 100px; */
}

.header-img-detail img {
  width: 47%;
  /* height: 100%; */
  border-radius: 20px;
  /* border: 2px solid lawngreen; */
}

.header-img-1 {
  object-fit: cover;
  transform: rotate(3deg);
  transition: all 0.3s ease;
}

.header-img-2 {
  /* margin-top: 40px; */
  object-fit: cover;
  transform: rotate(-3deg) translateY(20px);
  transition: all 0.3s ease;
  transform-origin: center;
}

.header-img-1:hover {
  transform: rotate(0deg);
}

.header-img-2:hover {
  transform: rotateX(0deg) translateY(20px);
}

/* respon */

/* section review */
.section-review {
  width: 100%;
  /* height: 300px; */
  padding: 64px 0;
  background-color: #e5e5e2;
}

.section-review-container {
  /* background-color: red; */
  max-width: 80%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  font-size: 20px;
}

.section-review-container-detail {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.section-review-container-detail i,
h2 {
  padding-bottom: 8px;
  font-size: 30px;
}

.section-review-container-detail p {
  font-weight: 100;
  font-size: 16px;
}

/*  */
main {
  /* background-color: #d86565; */
  padding: 80px 16px;
}

.main-container {
  background-color: #fff;
  margin: 0 auto;
  max-width: 80%;
}

.main-container-content {
  text-align: center;
  margin-bottom: 64px;
}

.main-container-content h2 {
  font-size: 40px;
}

.main-container-content p {
  font-size: 20px;
}

.main-container-menu {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.main-book-detail {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid rgb(190, 190, 190);
  border-radius: 10px;
  transition: all 0.4s ease;
  /*  */
  overflow: hidden;
}

.main-book-detail img {
  width: 100%;
  object-fit: cover;
  border-radius: 10px;
  height: 260px;
  transition: all 0.3s ease;
}

.book-detail-content {
  display: flex;
  flex-direction: column;
  padding: 24px;
  align-items: flex-start;
}

.book-category {
  /* background-color: black; */
  color: white;
  font-size: 12px;
  display: inline;
  padding: 2px 8px;
  border-radius: 8px;
  margin-bottom: 12px;
}

.book-detail-content h3,
.book-author {
  margin-bottom: 12px;
}

.book-rating {
  display: flex;
  margin-bottom: 16px;
}

.book-rating img {
  width: 20px;
  height: 20px;
}

.star-rating {
  margin-left: 10px;
}

.book-price {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.book-price span {
  font-size: 14px;
  color: #565656;
  text-decoration: line-through;
}

.btn-buy {
  padding: 0 24px 24px 24px;

  gap: 8px;
}

.btn-buy button {
  width: 100%;
  border: none;
  color: white;
  background-color: #00929f;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.btn-buy button:hover {
  background-color: #007b7f;
}

.main-book-detail:hover {
  transform: translateY(-8px);
}

.main-book-detail img:hover {
  transform: scale(1.05);
}

.btn-all {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 48px;
}

.btn-all-book {
  padding: 12px 32px;
  font-size: 17px;
  border-radius: 5px;
  border: 1px solid gray;
}

.btn-all-book:hover {
  background-color: #00929f;
  color: white;
}

/*  */

.book-footer-content {
  padding: 64px 20px;
  /* background-color: green; */
}

.footer-main-content {
  display: flex;
  flex-direction: column;
  max-width: 100%;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  text-align: left;
  max-width: 100%;
}

.footer-icon {
  display: flex;

  align-items: center;
  /* justify-content: center; */
  margin-top: 20px;
}

.footer-icon i {
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
  /* padding: 20px; */
  width: 36px;
  height: 36px;
  border-radius: 5px;
}

.footer-icon i:hover {
  background-color: #00929f;

  color: white;
}

.footer-content-1,
.footer-content-2,
.footer-content-3,
.footer-content-4 {
  display: flex;
  flex-direction: column;

  flex: 1;
}

ul li {
  list-style: none;
  margin-bottom: 8px;
  cursor: pointer;
}

ul li:hover {
  color: #00929f;
}

.footer-content h3,
h4 {
  padding-bottom: 16px;
}

.footer-end {
  border-top: 0.5px solid #f9f9f6;
  margin-top: 30px;
  text-align: center;
}

.footer-end p {
  padding-top: 30px;
}

/* respon */
/* respon */
@media (max-width: 1047px) {
  .header-book-div {
    flex-direction: column;
    text-align: center;
  }

  .header-content p {
    text-align: center;
  }

  .header-btn {
    justify-content: center;
  }

  .main-container-menu {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 762px) {
  .section-review-container {
    grid-template-columns: repeat(2, 1fr);
    /* grid-template-rows: auto auto; */
  }
  .main-container-menu {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 638px) {
  .header-btn {
    flex-direction: column;
    gap: 10px;
  }

  .header-book-div {
    max-width: 100%;
    width: 100%;
    margin: 0;
  }

  .footer-content {
    flex-direction: column;
    grid-template-columns: 1fr;
  }
}