body {
  padding: 0;
  margin: 0 auto;
  font-family: Tahoma;
}
.container {
  max-width: 1200px;
  margin: auto;
}
header {
  background-color: #4e4e4e;
}
.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  margin-left: 15px;
}
.box-header {
  display: flex;
  align-items: center;
  display: inline-block;
  line-height: 50px;
  text-align: center;
  margin-left: 100px;
  justify-content: space-between;
}
.box-header ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.box-header ul li {
  display: inline-block;
  text-align: center;
  line-height: 6px;
}
.box-header ul li a {
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  text-transform: uppercase;
  display: block;
  padding: 0 10px;
}
.box-header ul li a:hover {
  color: black;
  background-color: rgb(250, 250, 231);
  padding: 10px;
  border-radius: 5px;
}
.timkiem {
  margin-top: 0;
  margin-right: 15px;
}
.timkiem input {
  background: white;
  color: gray;
  height: 30px;
  outline: none;
  box-shadow: none;
  border: none;
  padding: 0 15px;
  border-radius: 5px;
}
.timkiem .nuttimkiem:hover {
  background-color: black;
  color: white;
}
.timkiem .nuttimkiem {
  height: 30px;
  border: none;
  outline: none;
  box-shadow: none;
  border-radius: 5px;
  padding: 0 5px;
}

.timkiem {
  margin-left: auto;
}

.quaylaitt {
  list-style: none;
  padding: 0;
  margin: 0;
  background-color: beige;
  height: 30px;
}
.quaylaitt > ul {
  margin: 0;
  list-style: none;
  text-decoration: none;
  display: flex;
  gap: 20px;
}
.quaylaitt > ul > li > a {
  line-height: 20px;
  color: black;
  display: block;
  padding: 0 0 3px;
  text-decoration: none;
  line-height: 30px;
}
.quaylaitt > ul > li > a:hover {
  text-decoration: underline;
  color: #4e4e4e;
}
.quaylaitt > p {
  background-color: beige;
  margin: 0;
  margin-left: 45px;
  padding-top: 6px;
  font-size: smaller;
  margin-bottom: 6px;
}
/* section */
section {
  background: gainsboro;
}
h1 {
  border-bottom: solid gray 1px;
  margin-left: 40px;
  margin-top: 0;
  padding-top: 20px;
}
.h1-trangchu {
  margin-top: 7px;
}
.tentacpham {
  border-bottom: solid gray 1px;
  text-align: left;
  margin-right: auto;
}
.thongtintryen {
  margin-bottom: auto;
}
.anhtruyen {
  margin-left: 40px;
  margin-top: -33px;
}
.section-tacpham {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.size-text {
  font-size: 16px;
  margin-left: 40px;
  margin-block: 40px;
}
.nutmua {
  width: 140px;
  margin-left: 60px;
  line-height: 40px;
  background: beige;
  border: none;
  border: 2px solid black;
}
.nutmua:hover {
  border: 2px dotted black;
  font-weight: bold;
}
/* aside */
.truyencungtacgia {
  border-bottom: solid gray 1px;
}
.thanh-aside {
  margin-left: auto;
}

.thanhdieuhuong {
  list-style: none;
  padding: 0;
  margin: 5px;
  background-color: white;
  margin-right: 40px;
  box-shadow: 0 0 10px gray;
  padding: 8px 8px 8px 8px;
  display: inline-block;
}
.thanhdieuhuong > li {
  padding: 8px;
}
.thanhdieuhuong > li > a {
  line-height: 20px;
  text-decoration: none;
  color: black;
  display: block;
  border-bottom: 1px dotted gray;
  padding: 0 0 3px;
  padding: 10px;
}
.thanhdieuhuong > li > a:hover {
  background: beige;
  text-decoration: underline;
}
.botter-truyen > img {
  margin-left: 36px;
}
.botter-bangdieuhuong {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.bangdieuhuong {
  list-style: none;
  padding: 0;
  margin: 5px;
  margin-right: 40px;
}
.bangdieuhuong > li {
  padding: 8px;
}
.bangdieuhuong > li > a {
  line-height: 20px;
  text-decoration: none;
  color: black;
  display: block;
  border-bottom: 1px dotted black;
}
.bangdieuhuong > li > a:hover {
  text-decoration: underline;
}
.box-chuog1-2 {
  display: flex;
}
.box-chuong1 {
  margin-left: 30px;
}
.box-chuong2 {
  margin-left: auto;
}
.danhsachchuong {
  list-style: none;
  padding: 0;
  margin: 5px;
}
.danhsachchuong > li {
  padding: 8px;
}
.danhsachchuong > li > a {
  line-height: 20px;
  text-decoration: none;
  color: black;
  display: block;
}
.danhsachchuong > li > a:hover {
  text-decoration: underline;
}
/* footer */
footer {
  margin-top: 20px;
  padding: 20px;
  background: rgb(237, 237, 250);
}
.box-theloai {
  display: flex;
  justify-content: space-between;
}
.anhft {
  margin-top: 50px;
}
.the {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
  margin-left: 172px;
}
.noidung {
  border: solid 1px gray;
  border-radius: 5px;
  margin-bottom: 4px;
  padding: 8px 12px;
  background-color: beige;
  display: inline-block;
}
.noidung:hover {
  color: black;
  background-color: gainsboro;
}
.text-footer > div > p {
  margin-left: 30px;
}
.gHichu {
  margin-left: 30px;
}
/* ========== */
h1 {
  color: #333;
}
.book-list {
  display: flex;
  align-items: center;
}
.book-img {
  width: 180px;
  background-color: gainsboro;
  text-align: center;
  margin-left: 15px;
}
.book-img > a > img {
  width: 100%;
  height: auto;
}
.book-img > a {
  font-size: 14px;
  padding: 5px;
  text-decoration: none;
  border-radius: 5px;
}

h2 {
  border-bottom: solid gray 1px;
  margin-left: 40px;
  margin-top: 40px;
}

/* =======slideshow */

.slideshow {
  max-width: 870px;
  margin: 30px auto;
}
.list-images img {
  max-width: 100%;
  height: 500px;
}
.item-image {
  display: none;
}
.control-button {
  position: absolute;
  left: 0;
  bottom: 15px;
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 20px;
}