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

html {
    font-size: 62.5%;
    font-family: "Poppins", sans-serif;
}

:root {
    --black-color: #1c1d1f;
    --hover-purple-color: #5624d0;
}

/* Header */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 72px;
    padding: 0 2.4rem;
    font-family: "Udemy Sans", sans-serif;
}

header .header-left {
    display: flex;
    align-items: center;
    flex: 1;
}

header .header-left .logo {
    padding: 0px 8px 0px 0px;
    cursor: pointer;
}

header .header-left .logo > img {
    width: 91px;
    height: 34px;
}

header .header-left span {
    color: var(--black-color);
    font-weight: 400;
    line-height: 1.4;
    font-size: 1.4rem;
    padding: 0 1.2rem;
    cursor: pointer;
}

header .header-left span:hover {
    color: var(--hover-purple-color);
}

header .header-right ul {
    display: flex;
    align-items: center;
}

header .header-right ul li {
    margin: 0px 15px;
    list-style: none;
}

header .header-right ul li a {
    color: var(--black-color);
    font-size: 1.35rem;
    text-decoration: none;
}

header .header-right ul li a:hover {
    color: var(--hover-purple-color);
}

.header-left .search-box {
    position: relative;
    display: flex;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0 1.6rem;
    flex: 1;
}

.header-left .search-input {
    height: 4.8rem;
    width: 100%;
    padding: 15px 45px 15px 15px;
    background-color: #f7f9fa;
    border-radius: 999px;
    border: 1px solid var(--black-color);
    margin: 0 1.2rem;
}

.header-left .search-input:focus {
    border: 1px solid var(--black-color);
    outline: 0;
}

.header-left .search-btn {
    background-color: transparent;
    font-size: 16px;
    padding: 6px 9px;
    margin-right: -55px;
    border: none;
    opacity: 0.5;
    z-index: 10;
    cursor: pointer;
}

.header-left .search-box input[type="text"] {
    padding: 0 5.3rem;
}

header .header-right ul span {
    display: flex;
    align-items: center;
    font-size: 2.4rem;
    margin: 0 10px;
    transition: 0.2s all ease;
}

header .header-right ul span:hover {
    cursor: pointer;
    color: var(--hover-purple-color);
}

header .header-right ul .profile {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background-color: var(--black-color);
    color: #fff;
    border-radius: 100%;
    padding: 1.5rem;
    font-weight: bold;
    font-size: 1.4rem;
    width: 3.2rem;
    height: 3.2rem;
    cursor: pointer;
    margin: 0px 14px;
}

/* Nav Bar */

nav {
    border-top: 1px solid #d1d7dc;
    background: #fff;
    box-shadow: 0 2px 4px rgb(0 0 0 / 8%), 0 4px 12px rgb(0 0 0 / 8%);
    z-index: 1009;
    font-family: "Udemy Sans", sans-serif;
}

nav ul {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 4.8rem;
}

nav ul li {
    list-style: none;
    padding: 0.8rem 1.6rem;
}

nav ul li a {
    color: var(--black-color);
    text-decoration: none;
    font-size: 1.3rem;
    font-weight: 400;
    line-height: 1.4;
}

nav ul li a:hover {
    color: var(--hover-purple-color);
}

/* Main Menu */

main {
    width: 100%;
    height: 100%;
}

main .menu-div {
    max-width: 134rem;
    margin: 0 auto 5rem;
    position: relative;
}

main .menu-div-image {
    position: relative;
    width: 100%;
    height: 100%;
}
main .menu-div-image > img {
    width: 100%;
    height: 100%;
}

.menu-div-describe .box {
    max-width: 44rem;
    position: absolute;
    top: 165px;
    left: 295px;
    transform: translate(-50%, -50%);
    background-color: #fff;
    padding: 2.4rem;
    box-shadow: 0 2px 4px rgb(0 0 0 / 8%), 0 4px 12px rgb(0 0 0 / 8%);
}

.menu-div-describe .box span {
    font-size: 36px;
    font-family: "Times New Roman", Times, serif;
    font-weight: 700;
    margin-bottom: 0.8rem;
}

.menu-div-describe .box p {
    margin-top: 10px;
    font-size: 16px;
    font-weight: 400;
    font-family: sans-serif;
    line-height: 1.4;
}

.menu-div .menu-div-image .btn-left-arrow {
    position: absolute;
    top: 50%;
    left: 1.6rem;
    transform: translateY(-50%);
    cursor: pointer;
    transition: 0.1s all ease;
    z-index: 1000;
}

.menu-div .menu-div-image .btn-right-arrow {
    position: absolute;
    top: 50%;
    right: 1.6rem;
    transform: translateY(-50%);
    cursor: pointer;
    transition: 0.1s all ease;
    z-index: 1000;
}

.menu-div .menu-div-image .btn-left-arrow:hover,
.menu-div .menu-div-image .btn-right-arrow:hover {
    opacity: 0.83;
}

.menu-div .menu-div-image .btn-left-arrow i,
.menu-div .menu-div-image .btn-right-arrow i {
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid var(--black-color);
    border-radius: 50%;
    background-color: var(--black-color);
    color: #fff;
    font-size: 20px;
    box-shadow: 0 2px 4px rgb(0 0 0 / 8%), 0 4px 12px rgb(0 0 0 / 8%);
    width: 45px;
    height: 45px;
}

/* Container Learn */

.container-learn {
    max-width: 134rem;
    margin: 0 auto;
    padding: 0 2.4rem;
    transition: 0.2s all ease;
}

.container-learn .container-text {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.container-learn .container-text a {
    font-size: 14px;
    margin-right: 1.5rem;
    color: #5624d0;
    text-underline-offset: 0.4rem;
    font-weight: 700;
}

.container-learn .container-text a:hover {
    color: #401b9c;
}

.container-learn .container-text h1 {
    display: block;
    font-size: 32px;
    font-weight: 700;
    font-family: SuisseWorks, Georgia, Times, times new roman, serif, apple color emoji, segoe ui emoji, segoe ui symbol;
    margin-left: 1.5rem;
}

.container-learn .course-watched {
    display: flex;
    margin-top: 2rem;
}

.container-learn .course-profile {
    display: flex;
    height: 100%;
    width: 100%;
    height: auto;
    border: 1px solid #ccc;
    margin: 0 10px;
    cursor: pointer;
    transition: 0.2s all ease;
}

.container-learn .course-profile:hover {
    background-color: #f1f1f1;
}

.container-learn .course-profile .left-side {
    width: 12rem;
    height: 15rem;
    position: relative;
}

.container-learn .course-profile .left-side::before {
    content: "";
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.3);
}

.container-learn .course-profile .left-side::after {
    content: "\f04b";
    font-family: "FONT AWESOME 5 FREE";
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: white;
    color: black;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
}

.container-learn .course-profile .left-side img {
    height: 100%;
    width: 100%;
    object-fit: cover;
}

.container-learn .course-profile .right-side {
    display: flex;
    flex-direction: column;
}

.container-learn .course-profile .right-side .course-name {
    width: 200px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 1rem 1.2rem 0 1.2rem;
}

.container-learn .course-profile .right-side .course-name span {
    font-size: 12px;
    color: #6a6f73;
    font-weight: 600;
}

.container-learn .course-profile .right-side .course-details {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.container-learn .course-profile .right-side .course-details div {
    margin-left: 1.2rem;
    margin-top: 0.6rem;
    font-weight: 600;
    font-size: 1.5rem;
}

.container-learn .course-profile .right-side .course-details .class {
    display: flex;
    align-items: center;
    margin-top: auto;
}

.container-learn .course-profile .right-side .course-details .class p {
    color: var(--black-color);
    font-weight: 600;
    font-size: 1.2rem;
}

.container-learn .course-profile .right-side .course-details .class span {
    color: #6a6f73;
    font-size: 12px;
    font-weight: 400;
}

/* Register Course */

.discount-course {
    max-width: 134rem;
    margin: 0 auto;
    padding: 0rem 2.4rem;
}

.register-course {
    max-width: 60rem;
    margin-top: 4rem;
    margin-left: 1.5rem;
}

.register-course span {
    max-width: 60rem;
    font-size: 32px;
    font-weight: 700;
    font-family: SuisseWorks, Georgia, Times, times new roman, serif, apple color emoji, segoe ui emoji, segoe ui symbol;
    line-height: 1.5;
}

.register-course span:last-child {
    display: block;
    font-size: 28px;
    margin: 2.1rem 0 1.6rem 0;
}

/* Special Course */

.discount-course .special-course {
    display: flex;
    max-width: 134rem;
    margin: 0 auto;
    border: 1px solid #ccc;
    padding: 1.8rem 1.2rem;
    transition: 0.2s all ease;
    cursor: pointer;
}

.discount-course .special-course:hover {
    background-color: #f1f1f1;
}

.special-course .left-side {
    max-width: 134rem;
    margin: 0.5rem 1.5rem;
}

.special-course .right-side {
    width: 40%;
    margin-left: 1.2rem;
    /* height: 100%; */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.special-course .right-side .course-name,
.special-course .right-side .course-details,
.special-course .right-side .course-author,
.special-course .right-side .course-date-details {
    margin-bottom: 0.4rem;
}

.special-course .right-side .course-name h2 {
    font-size: 2.4rem;
    font-weight: 700;
}

.special-course .right-side .course-details p {
    font-size: 1.4rem;
    font-weight: 400;
}

.special-course .right-side .course-author span {
    font-size: 1.2rem;
    color: #6a6f73;
}

.special-course .right-side .course-date-details span {
    font-size: 1.2rem;
    color: #6a6f73;
}

.special-course .right-side .course-rating .course-point {
    display: flex;
    gap: 5px;
    font-size: 1.2rem;
}

.special-course .right-side .course-rating .course-stars i {
    color: #dc9a31;
}

.special-course .right-side .course-rating .course-point .course-review span {
    color: #6a6f73;
}

.special-course .right-side .course-price {
    font-size: 1.9rem;
    margin-top: auto;
    font-weight: 600;
    margin-bottom: 1rem;
}

.special-course .right-side .course-price .old-price {
    text-decoration: line-through;
    color: #6a6f73;
    margin-left: 0.2rem;
    font-weight: 400;
}

/* Recommended Course Section */

.recommended-course {
    max-width: 134rem;
    margin: 0 auto 5rem;
    display: flex;
    padding: 0rem 2.4rem;
}

.recommended-course-title {
    max-width: 134rem;
    margin: 0 auto;
    margin-top: 4rem;
}

.recommended-course-title h1 {
    margin: 0 0 2rem 3.4rem;
    font-size: 2.4rem;
    font-weight: 600;
}

.recommended-course .course-list {
    max-width: 134rem;
    margin: 0 10px;
    cursor: pointer;
}

.course-list .course-img img {
    border: 1px solid #6a6f73;
    width: 100%;
    height: 100%;
}

.recommended-course-details .course-name {
    font-size: 1.6rem;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.recommended-course-details .course-author {
    font-size: 1.2rem;
    color: #6a6f73;
    margin-bottom: 0.4rem;
}

.recommended-course-details .course-point {
    display: flex;
    gap: 5px;
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

.recommended-course-details .course-point .course-stars,
.recommended-course-details .course-point span {
    color: #dc9a31;
    font-weight: bold;
}

.recommended-course-details .course-review span {
    color: #6a6f73;
    font-weight: 500;
}

.recommended-course-details .course-price {
    display: flex;
    gap: 10px;
    font-weight: bold;
    font-size: 1.6rem;
    color: var(--black-color);
}

.recommended-course-details .course-price .old-price {
    text-decoration: line-through;
    color: #6a6f73;
    font-weight: 400;
}

.course-list .best-sales {
    display: inline-block;
    margin-top: 1rem;
}

.course-list .best-sales span {
    background-color: #eceb98;
    color: #3d3c0a;
    font-size: 1rem;
    padding: 4px 8px;
    font-weight: bold;
}

/* Recommended Course List 2 */

.recommended-course-list-2 {
    display: flex;
    max-width: 134rem;
    margin: 0 auto;
    padding: 3.4rem;
}

.recommended-course-title-2 {
    max-width: 134rem;
    margin: 2rem auto;
    padding: 0 3.4rem;
}

.recommended-course-title-2 h2 {
    font-size: 2rem;
    width: 50%;
    font-weight: bold;
}

.recommended-course-title-2 a {
    text-decoration: none;
    color: #5624d0;
    transition: 0.3s all ease;
}

.recommended-course-title-2 a:hover {
    color: #4a20b4;
}

/* Recommended Subject */

.recommended-subject-title {
    max-width: 134rem;
    margin: 4rem auto;
    padding: 0 3.4rem;
}

.recommended-subject-title h2 {
    font-size: 2.4rem;
}

.recommended-subject .recommended-subject-container {
    max-width: 134rem;
    margin: 4rem auto;
    padding: 0 2.4rem;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.recommended-subject .recommended-subject-container .box {
    border: 1px solid #d1d7dc;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.4rem;
    min-height: 5.6rem;
    font-weight: 700;
    color: var(--black-color);
    cursor: pointer;
    transition: 0.3s all ease;
}

.recommended-subject .recommended-subject-container .box:hover {
    background-color: #f5f5f5;
}

/* Footer */

.footer-row-1 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--black-color);
    border-top: 1px solid #3e4143;
    color: #fff;
    padding: 2rem 4.8rem;
}

.footer-row-1 h2 {
    font-size: 1.8rem;
    margin: 6px 0;
    font-weight: 700;
}

.footer-row-1 p {
    font-size: 1.4rem;
}

.footer-row-1-right button {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
    height: 4.8rem;
    padding: 2rem 2rem;
    font-weight: bold;
    font-size: 1.4rem;
    cursor: pointer;
}

.footer-row-1-right button:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.footer-row-2 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--black-color);
    border-top: 1px solid #3e4143;
    color: #fff;
    padding: 2rem 4.8rem;
}

.footer-row-2 .footer-row-2-left span {
    font-size: 1.8rem;
    font-weight: 700;
}

.footer-row-2 .footer-row-2-left a {
    color: #cec0fc;
    text-decoration: none;
}

.footer-row-2 .footer-row-2-left a:hover {
    text-decoration: underline;
}

.footer-row-2-right {
    display: flex;
}

.footer-row-2-right img {
    margin: 0 15px;
}

.footer-row-3 {
    display: flex;
    justify-content: space-between;
    background: var(--black-color);
    border-top: 1px solid #3e4143;
    color: #fff;
    padding: 2rem 4.8rem;
}

.footer-row-3 div {
    display: flex;
    gap: 120px;
}

.footer-row-3 ul li {
    list-style: none;
    margin: 7px 0px;
}

.footer-row-3 ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 1.3rem;
}

.footer-row-3 ul li a:hover {
    text-decoration: underline;
}

.footer-row-3-right div button {
    display: flex;
    align-items: center;
    gap: 5px;
    background-color: var(--black-color);
    color: #fff;
    padding: 0.8rem 2rem;
    border: 1px solid #fff;
    min-width: 14rem;
    height: 4rem;
    font-size: 1.45rem;
    cursor: pointer;
}

.footer-row-3-right div button span {
    font-size: 2rem;
}

.footer-row-3 button:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

.footer-row-4 {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #1c1d1f;
    color: #fff;
    padding: 2rem 4.8rem;
}

.footer-row-4 .footer-row-4-left img {
    height: 34px;
    width: 91px;
    color: wheat;
    margin-top: 2rem;
}

.footer-row-4-right span {
    font-size: 1.2rem;
}

.language {
    margin-left: auto;
    margin-right: 2rem;
}

.language span {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
    padding: 1rem 4rem;
    font-weight: 500;
    font-size: 1.4rem;
    cursor: pointer;
}

.language span:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

/* Responsive */

@media screen and (max-width: 1200px) {
    .course-profile:nth-last-child(1) {
        display: none;
    }

    .course-list:nth-last-child(1) {
        display: none;
    }
    .footer-row-1 {
        padding: 2rem 3.6rem;
    }
    .footer-row-2 {
        padding: 2rem 3.6rem;
    }

    .footer-row-3 {
        padding: 2rem 3.6rem;
    }

    .menu-div-image > img {
        width: 100%;
        height: 100%;
    }

    .menu-div-describe .box {
        top: 130px;
        left: 250px;
        max-width: 40rem;
    }

    .menu-div .menu-div-image .btn-right-arrow {
        top: 15rem;
    }

    .menu-div .menu-div-image .btn-left-arrow {
        top: 15rem;
    }

    .recommended-subject .recommended-subject-container {
        grid-template-columns: repeat(4, 1fr);
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(1) {
        display: none;
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(6) {
        display: none;
    }
}

@media screen and (max-width: 1123px) {
    nav div ul li:nth-last-child(1) {
        display: none;
    }
}

@media screen and (max-width: 1081px) {
    header .header-right ul li:nth-child(1) {
        display: none;
    }
}

@media screen and (max-width: 1055px) {
    nav div ul li:nth-last-child(2) {
        display: none;
    }
}

@media screen and (max-width: 980px) {
    .recommended-subject .recommended-subject-container {
        grid-template-columns: repeat(3, 1fr);
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(2) {
        display: none;
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(5) {
        display: none;
    }
}

@media screen and (max-width: 930px) {
    .footer-row-3 div {
        gap: 50px;
    }
}

@media screen and (max-width: 921px) {
    header .header-right ul li:nth-child(2) {
        display: none;
    }

    nav div ul li:nth-last-child(3) {
        display: none;
    }
}

@media screen and (max-width: 826px) {
    nav div ul li:nth-last-child(4) {
        display: none;
    }
}

@media screen and (max-width: 700px) {
    .recommended-subject .recommended-subject-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(3) {
        display: none;
    }

    .recommended-subject .recommended-subject-container .box:nth-last-child(4) {
        display: none;
    }
}