.container-boxed {
    max-width: 1505px;
    margin: 0 auto; 
    box-sizing: border-box; 
}
.container-fullwidth {
    width: 100%;
    max-width: 1920px;
    margin: 0 auto; 
}
.container-fullwidth1 {
    margin: 50px 0px;
    width: 100%;
    max-width: 1920px;
    background: linear-gradient(180deg, #157FFF 0%, #1E00AE 100%);
}

.container-fullwidth2 {
    margin: 0 auto;
    width: 100%;
    max-width: 1920px;
    background: #EEF6FF;
    padding-bottom: 30px;
}






.sidebar-header {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    gap: -30px;
}


.tab.active {
    background-color: #2700E1;
    color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 1px solid #fff;
    border-radius: 5px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 26px;
}
.tab {
    width: 48%;
    padding: 10px;
    border: none;
    background-color: #1A0097;
    color: white;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: 5px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 26px;
}

.content {
    display: none;
}

.content.active {
    display: block;
}

.sidebar h3 {
    font-size: 18px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    padding: 5px;
}

.sidebar h4 {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    font-family: Ford Antenna;
    font-size: 18px;
    font-weight: 500;
    line-height: 31.5px;
}

.sidebar h3 span a {
    color: white;
    font-size: 14px;
    text-decoration: none;
}

.sidebar h3 span a:hover {
    text-decoration: underline;
}

ul {
    list-style-type: none;
}

.publisher-list li,
.topics-list li,
.collections-list li {
    margin-bottom: 10px;
}


.publisher-list li a:hover,
.topics-list li a:hover,
.collections-list li a:hover {
    background-color: #1d397b;
}

.letter {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 5px;
    display: block;
}

/* Cấu trúc Flexbox cho hai cột */
.publisher-container {
    display: flex;
    width: 100%;
}

/* Cột bên trái: Chữ cái (10%) */
.letters-column {
    width: 10%;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.letters-list {
    list-style: none;
    padding: 0;
}

.letters-list li {
    margin-bottom: 10px;
}

.letters-list li a {
    background-color: #0044cc;
    color: white;
    border-radius: 5px;
    display: block;
    width: 24px;
    height: 24px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    text-align: center;
    display: flex;
    flex-direction: column-reverse;
}
.letters-list li a.active {
    background-color: #157FFF;
    color: white;
}

/* Cột bên phải: Chữ và icon (90%) */
.publishers-column {
    width: 90%;
}

.publishers-list {
    list-style: none;
    padding: 0;
}

.publishers-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 10px;
    transition: background-color 0.3s;
    border-bottom: 1px dashed #5640c2;
}

.publishers-list li:hover {
    background-color: #1d397b;
}

.publishers-list li a {
    text-decoration: none;
    color: white;
    flex-grow: 1;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;
    text-align: left;
}

.arrow {
    color: white;
    font-size: 20px;
}

.icon-text {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: Ford Antenna;
    font-size: 18px;
    font-weight: 500;
    line-height: 31.5px;
}
.view-more {
    display: flex;
    align-items: center;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 24px;
}
.topics-list li , .collections-list li{
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 5px;
    transition: background-color 0.3s;
    border-bottom: 1px dashed #5640c2;
}
.topics-list a , .collections-list a{
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 500;
    line-height: 20px;    
}
.thanhngang {
    border: 3px solid #1A0097;
    width: calc(100% + 10%);
    margin-left: -5%;
}

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

body {
    font-family: Arial, sans-serif;
}

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 25%;
    background-color: #1E00AE; 
    padding: 20px;
    color: white;
    border-radius: 0px 0px 10px 10px;
    max-height: 1265px;
    overflow-y: auto;
}

.sidebar h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.sidebar ul {
    list-style-type: none;
}

.sidebar ul li {
    margin-bottom: 10px;
}

.sidebar ul li a {
    color: white;
    text-decoration: none;
}

.sidebar ul li a:hover {
    text-decoration: underline;
}

.main-content {
    width: 75%;
    padding: 20px;
}

.banner img {
    width: 100%;
    height: auto;
    margin-bottom: 20px;
}

.featured-section {
    margin-bottom: 40px;
}

.featured-section h2 {
   
    margin: 20px 0px;
    font-family: Ford Antenna;
    font-size: 26px;
    font-weight: 600;
    line-height: 36px;
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
}

.featured-section a{

    font-family: Ford Antenna;
font-size: 14px;
font-weight: 400;
line-height: 18px;
text-align: right;
color: #2C2C2C;
text-decoration: none;
}

.product-grid {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* Container của slider */
.slider-container {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: auto;
    overflow: hidden;
    border-radius: 10px; 
}

/* Các hình ảnh slide */
.slide {
    display: flex;
    transition: transform 0.5s ease-in-out; 
    width: 100%; 
}

.slide img {
    width: 100%; 
    height: auto;
}

.dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
}

.dot {
    height: 10px;
    width: 10px;
    margin: 0 5px;
    background-color: #bbb;
    border-radius: 50%;
    display: inline-block;
    cursor: pointer;
}

.dot.active {
    background-color: #0091ff;
}


.standard-tabs {
    display: flex;
    gap: 5px;
    margin: 20px 0;
    width: 100%;
    flex-wrap: wrap;
}

.tab-item {
    background-color: #EEF6FF;
    border: none;
    padding: 10px 10px;
    border-radius: 20px;
    font-size: 14px;
    color: #1E00AE;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease;
    justify-content: flex-end;
    gap: 5px;
    border: 1px solid #C7E0FF;
}
.tab-item .icon2 {
    display: none;
}

.tab-item.active .icon1 {
    display: none; /* Ẩn icon 1 khi được chọn */
}

.tab-item.active .icon2 {
    display: inline; /* Hiển thị icon 2 khi được chọn */
}

.tab-item img.icon {
    width: 20px;
    height: 20px;
    margin-right: 10px; /* Khoảng cách giữa icon và text */
}

.tab-item.active {
    background-color: #1e3a8a; /* Màu nền khi được chọn */
    color: white;

}


.tab-item:hover {
    background-color: #bcdcff;
}

.tab-item:focus {
    outline: none;
}

.standard-tabs a {
    color: #2700e1;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 500;
    line-height: 16px;
    text-align: left;
}

.carousel {
    position: relative;
    width: 100%;
    margin-bottom: 20px;
}
.carousel1 ,.carousel1-book{
    position: relative;
    width: 95%; 
    margin: 0 auto; 
    padding-bottom: 50px;
}

.product-slider ,.product-slider1 , .product-slider2, .product-slider3, .product-slider4,.product-slider-book {
    display: flex;
    overflow: hidden; 
    position: relative; 
}

.product-list .product-item-publisher  ,.product-list3 .product-item , .product-list4 .product-item-publisher , .product-list-book .product-item {
    flex: 0 0 231px;
}
.carousel1 .prev-btn , .carousel1-book .prev-btn{
    margin-left: -70px;
}
.carousel1 .next-btn ,.carousel1-book .next-btn{
    margin-right: -70px;
}

.product-list , .product-list1 ,  .product-list2 ,  .product-list3 ,  .product-list4 ,.product-list-book{
    display: flex;
    transition: transform 0.5s ease-in-out; /* Thêm hiệu ứng chuyển động mượt */
    gap: 10px; /* Khoảng cách giữa các sản phẩm */
}


.prev-btn, .next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1;
}

.prev-btn {
    left: 0;
    background-color: #fff;
    color: #2C2C2C;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.1);
    margin-left: -10px;
}

.next-btn  {
    right: 0;
    background-color: #fff;
    color: #2C2C2C;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.1);
    margin-left: -10px;
}







/* css đoạn dưới */
.title1 {
    font-family: Ford Antenna;
    font-size: 26px;
    font-weight: 500;
    line-height: 36px;
    text-align: center;
    color: #fff;
    padding-top: 50px;
}

.buton1 {
    text-align: center;
    margin: 30px 0px;
}

#Standards1 {
    background-color: #2700E1;
    color: #fff;
    padding: 7px 30px 7px 30px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 26px;
    text-align: center;
    border: 1px solid #fff;
    border-radius: 45px;
}
#Books1 {
    color: #fff;
    padding: 7px 30px 7px 30px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 26px;
    text-align: center;
    border: 1px solid #fff;
    border-radius: 45px;
}
.buton1 button.active {
    background-color: #1E00AE;
    color: #fff;
}

.buton1 button:hover {
    background-color: #157FFF;
    color: #fff;
}

.content-section {
    display: none; /* All content sections hidden by default */
}

/* phần 3 */

.next-btn {
    right: 0;
    background-color: #fff;
    color: #2C2C2C;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.1);
}

.filter-btn {
    background: none; 
    border: none;
    color: #2C2C2C; 
    cursor: pointer; 
}
.filter-buttons {
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 400;
    line-height: 18px;
}
.special-offer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.title2 {
    font-family: Ford Antenna;
    font-size: 26px;
    font-weight: 500;
    line-height: 36px;
    padding: 0 20px;
}

.filter-btn.active {
    color: #1E00AE;
}

.filter-btn:hover {
    color: #1E00AE; 
    background-color: #fff;
}

.filter-btn:hover , .filter-btn:hover , .filter-btn:active ,.filter-btn:active{
    background-color: #fff;
}



.product-display {
    display: grid;
    grid-template-columns: 0.9fr 1fr 0.9fr;
    margin-bottom: 30px;
}

.left-section, .right-section {
    display: grid;
    grid-template-columns: 1fr 1fr; 
    grid-template-rows: 1fr 1fr; 
}

.center-section {
    display: flex;
    justify-content: center; /* Center the main product */
    align-items: center;
}

.product-card {
    background-color: #fff;
    padding: 10px;
    text-align: left;
    border: 1px solid #EDEDED;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

.product-category1 {
    padding: 30px 0px;
    color: #157FFF;
}
.product-image-center {
    margin: 30px 130px;
    text-align: center;
    max-width: 250px;
    height: 342px;
}
.product-title1 {
    font-family: Ford Antenna;
    font-size: 24px;
    font-weight: 500;
    line-height: 24px;
    color: #2c2c2c;
}
.product-group1 {
    font-family: Ford Antenna;
    font-size: 12px;
    font-weight: 300;
    line-height: 21px;
    color: #7E7E7E;
}

.product-price1 {
    font-family: Ford Antenna;
    font-size: 24px;
    font-weight: 500;
    line-height: 27px;
}
.product-info {
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 300;
    line-height: 22px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: normal;
}

/* Style click added button wishlist */
.btn-wishlist svg {
    margin-right: 3px;
}
.btn-wishlist:hover svg path,
.btn-wishlist:hover svg {
    transition: all .3s;
}

.btn-wishlist:hover svg path,
.btn-wishlist.added svg path {
    stroke: white; 
}

button.btn-wishlist:hover,
button.btn-wishlist:active,
button.btn-wishlist:focus,
button.btn-wishlist.added {
    background-color: #1E00AE !important;
    color: #fff !important;
}

.filter-btn:focus{
    background-color: #fff;
}

.button-container {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    justify-content: center;
}

.btn-wishlist {
    display: flex;
    gap: 5px;
    color: #1E00AE;
    border: 1.3px solid #1E00AE;
    border-radius: 5px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 500;
    line-height: 24px;
    width: 185px;
    justify-content: center;
    height: 50px;
    align-items: center;
}
.btn-cart {
    display: flex;
    gap: 5px;
    color: #fff;
    border: 1.3px solid #1E00AE;
    border-radius: 5px;
    font-family: Ford Antenna;
    font-size: 14px;
    font-weight: 500;
    line-height: 24px;
    background-color: #1E00AE;
    width: 185px;
    justify-content: center;
    height: 50px;
    align-items: center;
}


/* <!-- Phần 4 --> */

.banner-container {
    display: flex;
    justify-content: space-between;
    margin: 100px 0px;
}

/* Each banner item */
.banner-item {
    position: relative;
    width: 32%;
    padding: 20px;
    border-radius: 10px;
    color: white;
    text-align: left;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    height: 250px;
   

}

.banner1 {
    background-color: #ff6f61;
}

.banner2 {
    background-color: #007bff;
}

.banner3 {
    background-color: #fcbf49;
}

.banner-item h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.view-more {
    color: white;
    text-decoration: underline;
    display: inline-block;
    font-family: Inter;
    font-size: 16px;
    font-weight: 500;
    line-height: 19.2px;
}

.banner-image {
    position: absolute;
    right: 10px;
    height: auto;
}


.banner-item h2 {
    margin-bottom: 10px;
    font-family: Ford Antenna;
    font-size: 26px;
    font-weight: 500;
    line-height: 39px;
}


/* <!-- Phần 5 --> */
.thanh-ngang{
    padding: 50px;
}
.top-sell-book , .top-sell-standards{
    display: flex;
    justify-content: space-between;
}

.anhphu {
    width: 20%;
}

.anhphu-banner {
    width: 236px;
    height: 387px;
    object-fit: cover;
    border-radius: 10px;
}

.san-pham-top-sell , .san-pham-top-standards {
    width: 80%;
}










.custom-carousel {
    position: relative;
    width: 100%;
}

.custom-product-slider {
    overflow: hidden; 
}

.custom-product-list {
    display: flex;
    transition: transform 0.5s ease-in-out;
    gap: 10px; 
}

.custom-product-item {
    flex: 0 0 calc(20% - 10px); 
    box-sizing: border-box;
}

.custom-prev-btn, .custom-next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: #FF2E00;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
    z-index: 1;
}

.custom-prev-btn {
    left: 10px; 
}

.custom-next-btn {
    right: 10px; 
}

/* CSS để đưa loading ra giữa */
#loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.8); 
    z-index: 9999; 
}

#loading-container i {
    font-size: 80px; 
    color: #1e00ae; 
    animation: spin 1s linear infinite; 
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}









/* reponsive */


.drag-handle,
.overlay {
    display: none;
}

@media screen and (max-width: 1024px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100%;
        transition: left 0.3s ease;
        border-radius: 0 10px 10px 0;
        z-index: 1000;
        overflow-y: auto;
    }
    
    .drag-handle {
        display: flex;
        position: fixed;
        top: 50%;
        left: -12px;
        transform: translateY(-50%);
        width: 35px;
        height: 60px;
        background-color: #EBEBEB;
        color: white;
        justify-content: center;
        align-items: center;
        border-radius: 5px;
        cursor: pointer;
        z-index: 1;
        box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.5);
    }
    
    
    .overlay {
        display: none; 
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
    
    .sidebar.active {
        left: 0;
    }

    .sidebar.active ~ .overlay {
        display: block;
    }

    body.sidebar-open {
        overflow: hidden;
    }
    


    .main-content {
        width: 100%;
    }


}


@media screen and (max-width: 1800px) {
    .carousel1 .next-btn ,.carousel1-book .next-btn  {
        margin-right: 0px;
        right: 0;
        background-color:#dadada ;
    }
    .carousel1 .prev-btn , .carousel1-book .prev-btn{
        margin-left: -25px;
        left: 0;
        background-color:#dadada ;
    }
}

@media screen and (max-width: 1550px) {
    .product-display {
        display: grid;   
         grid-template-columns: none; 
        margin-bottom: 30px;
    }

    .left-section, .right-section {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr 1fr;
        grid-template-rows: none;
        padding: 20px;
    }

    .product-card {
        text-align: center;
        margin: 20px;
    }

    .top-sell-book, .top-sell-standards {
        display: flex;
        justify-content: space-between;
        flex-direction: column;
        align-items: center;
    }
    .left-section .product-item , .right-section .product-item{
        text-align: center;
    }
    .san-pham-top-sell, .san-pham-top-standards {
        width: 100%;
        padding-left: 20px;
        padding-right: 20px;
    }
    .banner-container {
        display: flex;
        justify-content: space-around;
        margin: 100px 0px;
        padding: 20px;
    }
    .anhphu {
         width: 236px; 
         margin-bottom: 20px;
    }
    .banner-item {
        width: 482px;
        margin-right: 20px;
    }

   .left-section a.product-link ,.right-section a.product-link{
        text-decoration: none;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
}

@media screen and (max-width: 1300px) {
    .banner-container {
        display: flex;
        justify-content: space-around;
        margin: 100px 0px;
        align-items: center;
        flex-direction: column;
        gap: 20px;
    }

    
}

@media screen and (max-width: 850px) {
    .left-section, .right-section {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
}


@media screen and (max-width: 500px) {
    .banner-item {
        width: 95% !important;
    }
}

@media screen and (max-width: 440px) {
    .featured-section h2 ,.title2 {
        font-size: 16px;
        line-height: 25px;
    }

    .featured-section a {
        font-size: 12px;
    }
    .featured-section {
        margin-bottom: 0px;
    }
    .tab-item {
        font-size: 12px;
    }
    .icon2 ,.icon1{
        width: 18px;
    }
    .standard-tabs a {
        font-size: 12px;
    }
    .product-list, .product-list1, .product-list2, .product-list3, .product-list4, .product-list-book {
        gap: 5px;
    }
     .product-slider1, .product-slider2 {
        margin-left: -15px;
    }

    .btn-wishlist ,.btn-cart{
        font-size: 12px;
        width: 130px;
        height: 40px;
    }
    .product-info {
        font-size: 12px;
    }
    .product-price1 ,.product-title1 {
        font-size: 20px;
    }
    .product-category1 {
        padding: 18px 0px;
        font-size: 14px;
    }
    .product-image-center {
        max-width: 200px;
        height: 310px;
    }
    .filter-btn{
        font-size: 12px;
    }
    .icon-text,.sidebar h4  {
        gap: 5px;
        font-size: 14px;
        line-height: 23.5px;
        margin-left: -20px;
    }
    .sidebar h3 span a {
        font-size: 12px;
    }
    .sidebar-header {
        display: flex;
        justify-content: space-between;
    
    }
    .publishers-list li a {
        font-size: 12px;
    }
    .arrow {
        margin-right: -20px;
    }
    .topics-list a, .collections-list a {
        font-size: 12px;
    }
    
    
}











@media screen and (max-width: 1550px) {
    .product-image-center {
        margin: 0 auto;
        text-align: center;
        max-width: 217px;
        height: 342px;
        display: flex;
    }
}