html {
  font-size: 62.5%; /* 1rem = 10px */
}

body {
  font-size: 1.6rem; /* 16px */
}

/* ============================== LAPTOP NHỎ (992px - 1279px) ============================== */
@media screen and (min-width: 992px) {
  html {
    font-size: 58%; /* 1rem = 9.28px */
  }
  .filter-toggle {
    display: none;
  }
  .header__search-icon {
    display: none;
  }
  .header__search-wrapper.mobile {
    display: none;
  }
  .show-cart__item.mobile {
    display: none;
  }
}

/* ============================== TABLET (768px - 991px) ============================== */
@media screen and (min-width: 768px) and (max-width: 991px) {
  html {
    font-size: 55%; /* 1rem = 8.8px */
  }
  .header__search-icon {
    display: none;
  }
  /* TOPBAR */
  .topbar {
    /* position: fixed; */
    width: 100%;
  }
  .topbar__auth .topbar__auth-btn span {
    font-weight: 500;
    font-size: 2rem;
  }
  .topbar__contact {
    display: none;
  }
  .topbar__cart-icon {
    bottom: 10px;
    top: 10px;
    left: -70px;
  }
  .topbar__count-holder {
    top: 0px;
    right: 81px;
  }
  .topbart__cart-action {
    z-index: 5;
  }
  .topbar__cart-holder {
    /* position: none;
       */
    background-color: unset;
  }
  .topbar__cart-detail-holder {
    top: 32px;
    right: 34px;
    width: 310px;
  }
  .topbar__cart-content > p {
    display: none;
  }

  /* HEADER */
  /* .header {
    padding-bottom: 0px;
  } */
  .header > .d-flex {
    flex-wrap: wrap;
  }
  .header__logo {
    order: 1;
    width: 300px;
    flex: 0 0 auto;
  }
  .header__support {
    order: 2;
    flex: 0 0 auto;
  }
  .header__support-info {
    margin-left: 10px;
    font-size: 2rem;
    margin-bottom: 1rem;
  }
  .header__search {
    margin-top: 10px;
    order: 5;
    flex: 1 1 100%;
    /* flex-grow: 1; */
  }
  /* main */
  .main {
    margin-top: 4rem;
  }
  .main__container .content .banner {
    margin-top: 4rem;
  }
  /* body */
  .body__container {
    position: relative;
  }
  .body__container .book-category {
    width: 100%;
    scroll-margin-top: 250px;
  }
  .book-category__sort {
    margin-left: 30px;
  }
  .book-category__sort-item select {
    margin-top: 5px;
  }
  .book-category__list .book-category__item {
    flex: 0 0 33.33%; /* mỗi item chiếm 1/3 dòng */
    max-width: 33.33%; /* mỗi item chiếm 1/3 dòng */
    padding: 10px;
  }
  /* footer */
  .footer__top-item:first-of-type > h3 {
    width: max-content;
  }
  .footer__payment-image-container > img {
    margin-top: 10px;
    width: 70px;
  }
  .footer__payment-image-container-two > img,
  .footer__payment-image-container-three > img {
    margin-top: 10px;
    width: 100px;
  }
  /* Đăng nhập và đăng kí */
  .auth__container .auth__logo {
    width: 40%;
  }
  .auth__container .auth__logo img {
    margin-top: 50px;
  }
  .auth__container .auth__form-container {
    width: 60%;
  }
  /* Chi tiết sách */
  .show-detail-product__container {
    width: 95vw;
    padding: 2rem;
    max-height: 90vh;
    overflow-y: auto;
  }

  .show-detail-product__content {
    flex-direction: column;
    gap: 2rem;
    padding: 0 30px;
  }

  .show-detail-product__image,
  .show-detail-product__purchase {
    width: 100%;
  }

  .show-detail-product__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
  }

  .show-detail-product__btn {
    flex: 1 1 45%;
    padding: 2rem;
    font-size: 1.6rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    text-align: center;
  }

  .show-detail-product__quantity {
    justify-content: space-between;
    margin-top: 10px;
    width: 20%;
  }

  .show-detail-product__tabs {
    flex-direction: column;
    gap: 1rem;
  }

  .show-detail-product__tab {
    width: 100%;
    text-align: center;
  }
  .show-detail-product__info {
    padding: 0 30px;
  }

  .show-detail-product__tabs button:first-child {
    padding: 2rem;
  }
  .show-detail-product__tab.active {
    padding: 2rem;
  }
  /* LỌC */
  /* Nút mở lọc */
  .filter-toggle {
    padding: 10px 15px;
    background-color: #ccc;
    color: white;
    border: none;
    font-size: 16px;
    cursor: pointer;
    position: absolute;
    top: 105px;
    left: -91px;
    z-index: 3;
    border-radius: 5px;
  }

  /* Sidebar lọc */
  .book-filter {
    position: fixed;
    top: 0;
    left: -100%;
    width: 35% !important;
    overflow-y: auto;
    transition: left 0.4s ease;
    z-index: 1001;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    padding: 20px;
  }

  .book-filter.active {
    left: 0;
  }
  .filter-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid #ccc;
    background-color: #fff;
    color: #333;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
  }

  /* Overlay mờ */
  .overlay-filter {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .overlay-filter.active {
    display: block;
  }
  /* trang thanh toán */
  .show-cart__checkoutbox {
    width: 50%;
  }

  .left-container__warpper .left-container__header {
    display: block;
  }
  .left-container__warpper .left-container__header .left-container__button {
    margin-top: 10px;
    padding: 13px;
  }
  .mobile .header__search-btn {
    display: none !important;
  }
  .show-cart__item.mobile {
    display: none !important;
  }

  .order-history__container {
    width: 100%;
  }

  .order-history__content {
    padding: 0 6rem;
  }
}
/* ============================== ĐIỆN THOẠI (767px) ============================== */
@media (max-width: 767px) {
  html {
    font-size: 45%; /* 1rem = 8px */
    position: relative;
    width: 100vw !important;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
  }
  .container {
    max-width: 100% !important;
    width: 100vw !important;
    margin: 0 !important;
    padding: 0 12px;
  }
  /* topbar */
  .topbar {
    max-width: 100% !important;
    width: 100%;
  }
  .topbar__auth-btn > i {
    display: none;
  }
  .topbar__auth-btn > span {
    font-weight: 700;
    font-size: 2.2rem;
  }
  .topbar__contact {
    display: none;
  }
  .topbart__cart-action {
    position: fixed;
    top: -4px;
    right: -412px;
    height: 65px;
    z-index: 10;
  }
  .topbar__cart-icon {
    font-size: 2rem;
    bottom: 10px;
    top: 14px;
    left: -480px;
  }
  .topbar__count-holder {
    top: 6px;
    right: 502px;
  }
  .topbar__cart-holder {
    background-color: unset;
  }
  .topbar__cart-detail-holder {
    top: 32px;
    right: 461px;
    width: 300px;
    z-index: 3;
  }
  .topbar__cart-content > p {
    display: none;
  }
  /* header */
  .header__support-info,
  .header__support-icon,
  .header__search > .header__search-wrapper.desktop {
    display: none;
  }
  .header__logo {
    width: 75%;
  }
  .header__logo img {
    width: 60%;
  }
  .header__search-icon .fa-magnifying-glass {
    display: block;
    text-align: center;
  }

  .header__search-wrapper.mobile {
    position: absolute;
    right: 49px;
    top: 49px;
    display: flex;
    gap: 10px;
    /* background-color: white; */
    padding: 10px;
    /* border: 1px solid #ccc; */
    transform: translateX(170%);
    transition: transform 0.3s ease;
    z-index: 1000;
  }
  .mobile .header__search-btn {
    display: block !important;
  }

  /* Khi mở thì trượt vào */
  .header__search-wrapper.active {
    transform: translateX(0);
  }
  .header__search .header__search-wrapper input {
    width: 280px;
    padding: 10px !important;
  }
  .header__search .header__search-wrapper.mobile button {
    top: -573px;
  }
  .header__search .header__search-wrapper.mobile {
    display: block !important;
  }

  /* result search */
  .result-search__item-info {
    flex: 1;
    line-height: 1;
    min-width: 0;
    font-size: 18px;
  }
  .result-search__item .result-search__item-image {
    width: 40px;
    height: 100px;
    margin-right: 10px;
  }
  .result-search__wrapper {
    top: 50px;
  }
  .result-search__wrapper i {
    top: 22px;
  }
  .result-search__wrapper .result-search__wrapper-title {
    margin-top: 60px;
    font-size: 18px;
  }
  .result-search__item-author,
  .result-search__item-desc {
    display: none;
  }
  /* slider */
  .main__container .content .slider {
    top: -55px;
  }
  .banner {
    flex-direction: column;
  }
  .main__container .content .banner {
    margin-top: -45px;
  }
  .main__container .content .banner .banner__image {
    width: 100%;
  }
  .main__container .content .banner .banner__image:nth-child(2) {
    margin-top: 12px;
  }
  /* book filter */
  .book-filter {
    position: fixed;
    top: 0;
    left: -100%;
    width: 56% !important;
    overflow-y: auto;
    transition: left 0.4s ease;
    z-index: 1001;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    padding: 20px;
  }

  .book-filter.active {
    left: 0;
  }
  .filter-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border: 1px solid #ccc;
    background-color: #fff;
    color: #333;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .overlay-filter {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
  }

  .overlay-filter.active {
    display: block;
  }
  .body__container .book-category {
    width: 100%;
    scroll-margin-top: 30px;
  }
  .filter-group__content .filter-group__inputs .input-wraper {
    display: none;
  }
  /*  */
  .book-category__sort {
    margin-left: 40px;
    margin-top: 2.5rem;
    margin-bottom: 3rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  .book-category__sort-item {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
  }
  .book-category__list {
    /* display: grid;
    grid-template-columns: repeat(2, 230px); */
  }
  .book-category__list .book-category__item {
    width: 50%;
  }
  .footer__top-container,
  .footer__bottom-container {
    flex-wrap: wrap;
  }
  .footer__payment-image-container-three > img,
  .footer__payment-image-container-two > img {
    width: 100px;
  }
  /* chi tiết sách */
  .show-detail-product__container {
    width: 95vw;
    padding: 2rem;
    max-height: 90vh;
    overflow-y: auto;
  }

  .show-detail-product__content {
    flex-direction: column;
    gap: 2rem;
    padding: 0 30px;
  }

  .show-detail-product__image,
  .show-detail-product__purchase {
    width: 100%;
  }

  .show-detail-product__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
  }

  .show-detail-product__btn {
    flex: 1 1 45%;
    padding: 2rem;
    font-size: 1.6rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    text-align: center;
  }

  .show-detail-product__quantity {
    justify-content: space-between;
    margin-top: 10px;
    width: 40%;
  }

  .show-detail-product__tabs {
    flex-direction: column;
    gap: 1rem;
  }

  .show-detail-product__tab {
    width: 100%;
    text-align: center;
  }
  .show-detail-product__info {
    padding: 0 30px;
  }

  .show-detail-product__tabs button:first-child {
    padding: 2rem;
  }
  .show-detail-product__tab.active {
    padding: 2rem;
  }
  /* Đăng nhập và đăng kí */
  .auth__logo {
    display: none;
  }
  .auth__container .auth__form-container {
    width: 100%;
  }
  .auth__form-suggest p {
    margin-bottom: 10px;
  }
  .filter-toggle {
    position: absolute;
    right: 0;
  }
  #toast {
    width: 300px;
  }
  /* Giỏ hàng */
  .show-cart__item.desktop {
    display: none;
  }
  .show-cart__item {
    position: relative;
  }
  .show-cart__item img {
  }
  .show-cart__detail {
    margin: 0;
  }
  .info {
    position: relative;
  }
  .show-cart__amountbox {
    position: absolute;
    right: -11px;
    top: 32px;
  }
  .show-cart__img {
    width: 35%;
    height: auto;
  }
  .show-cart__amountbox button {
  }

  .show-cart__amountbox input {
  }
  .show-cart__remove {
    position: absolute;
    top: 26px;
    right: -16px;
  }
  .show-cart__bookname {
    width: 165px;
    font-weight: bold;
    font-size: 1.8rem;
    margin-bottom: 0.4rem;
  }
  .show-cart__priceamount {
    width: 50%;
    margin: 0;
  }
  .show-cart__checkoutbox button:nth-child(2) {
    display: none;
  }
  .show-cart__checkout {
    flex-wrap: wrap;
  }
  .show-cart__checkoutbox {
    margin-top: 10px;
    padding: 12px 20px;
    border-radius: 10px;
  }
  .show-cart__checkoutbox {
    width: 90%;
  }
  /* thanh toán */
  .checkout__container {
    display: block;
  }
  .checkout__customer-info-holder {
    width: 100%;
  }
  .checkout__cart-info-holder {
    width: 100%;
    background-color: unset;
    box-shadow: unset;
  }
  /* Thông tin khách hàng */
  .topbar__auth-list {
    right: -64px !important;
    width: 236% !important;
  }

  .right-content__warpper {
    display: none;
  }

  .right-container .left-container__warpper {
    width: 100%;
  }
  .left-container {
    width: 40%;
    padding: 10px 15px;
  }
  .left-container__warpper .left-container__header {
    flex-wrap: wrap;
  }
  .left-container__warpper .left-container__header .left-container__button {
    padding: 15px;
    margin-top: 8px;
  }

  .order-history__container {
    width: 100%;
    padding: 15px 0;
  }

  .order-history__content {
    padding: 0 3rem;
  }

  .order-history__status-select-container {
    gap: 3rem;
  }

  .order-history__detail-btn {
    padding: 0.5rem 1.5rem;
  }

  .order-history__cancel-btn {
    padding: 0.5rem 1.5rem;
    white-space: nowrap;
  }
}
@media (max-width: 700px) and (min-width: 600px) {
}