body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* overflow-x: hidden; */
    width: 100%;
    display: flex;
    flex-direction: column;
}

.Side_bar {
    width: 250px;
    max-height: 100vh;
    overflow-y: auto;
    background-color: rgb(231, 233, 235);
    padding-top:20px;
    border-right: 1px solid #ddd;
    position: fixed;
    top: 85px;
    bottom: 0;
}

.Side_bar h2 {
    font-size: 21px;
    color: #000;
    padding-left: 16px;
    margin: -4px 0 4px 0;
    font-weight: 400;
    line-height: 31.5px;
}

.sidebar-hover{
    background-color:#04AA6D;
    color: #fff !important;
}
.Side_bar .sidebar-hover:hover{
    background-color:#04AA6D;
    color: #fff;
}
.Side_bar a {
    display: block;
    padding: 2px 15px 1px 40px;
    color: #000;
    text-decoration: none;
    font-size: 15px;
    line-height: 22.5px;
}

.Side_bar a:hover {
    background-color: #ccc;
}

.Side_bar a.active {
    background-color: #04AA6D;
    color: white;
}
/* độ rộng thanh cuộn */
.Side_bar::-webkit-scrollbar {
    width: 22px;
}
/* nền thanh cuộn */
.Side_bar::-webkit-scrollbar-track {
    background: #f4f4f4;
}
/*thanh để kéo*/
.Side_bar::-webkit-scrollbar-thumb {
    background-color: #c5c5c5;
    border: 2px solid #c5c5c5; /* Tạo khoảng cách cho thanh cuộn */
    border-radius: 0;
}

.Side_bar::-webkit-scrollbar-thumb:hover {
    background-color: #acabab;
    border: 2px solid #acabab;
}

.Side_bar::-webkit-scrollbar-button:single-button {
    background-color: #f4f4f4;
}
/* nút trên */
.Side_bar::-webkit-scrollbar-button:single-button:vertical:decrement {
    background-image: url('data:image/svg+xml;charset=UTF-8,%3Csvg xmlns%3D"http%3A//www.w3.org/2000/svg" viewBox%3D"0 0 24 24"%3E%3Cpath fill%3D"%23acabab" d%3D"M7 14l5-5 5 5z"/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-position: center;
}
/* nút dưới */
.Side_bar::-webkit-scrollbar-button:single-button:vertical:increment {
    background-image: url('data:image/svg+xml;charset=UTF-8,%3Csvg xmlns%3D"http%3A//www.w3.org/2000/svg" viewBox%3D"0 0 24 24"%3E%3Cpath fill%3D"%23acabab" d%3D"M7 10l5 5 5-5z"/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-position: center;
    position: fixed;
    bottom: 0;
    z-index: 3;
    transform: translateX(-50%); /* Đảm bảo mũi tên cuộn nằm ngang giữa màn hình */
    display: block;
}
.app{
    position: relative;
    width: 100%;
    min-height: 100vh;
    flex-grow: 1;
}
.body{
    position: absolute;
    left: 250px;
    top: 90px;
    width: calc(100% - 250px);
    display: flex;
}

.body_1{
    padding:16px 32px 32px 32px;
    flex:1;
}
.body_2{
    width: 22%;
    border-left: 1px solid #ccc;
    text-align: center;
}

.body_1-ad1{
    text-align: center;
}
.body_1 .body_1-headerContent{
    font-weight: 400;
    font-size: 42px;
}
.body_1-header{
    position: relative;
}
button{
    font-size: 18px;
    background-color:#04AA6D;
    border-radius: 5px;
    font-weight: 600;
    font-family: Source Sans Pro;
    line-height: 27px;
    border: none;
    color: #fff;
}
.body_1-header button,
.body_1-slide8 button{
    padding: 8px 19px;
}
.body_1-header button + button,
.body_1-slide8 button + button{
    position: absolute;
    right: 0;
}
.body_1-sub p{
    margin: 15px 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 16px;
}
.body_1-sub button{
    margin: 6px 0 16px;
    padding:8px 25px;
}
hr{
    opacity: 0.2;
    margin: 20px -16px;
}
h2{
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 32px;
    font-weight: 400;
    line-height: 48px;
    margin: 10px 0 0 0;
}
p{
    font-size: 15px;
    line-height: 22.5px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin: 18px 0;
}
.content-2__heading {
    font-size: 2.4rem;
    margin: 10px 0;
}
.body_1-example .slide-2__content-2{
    width: 100% !important;
    background-color: #e7e9eb;
    padding: 8px 20px;
    margin: 24px -20px;
    box-shadow: 0 0 10px rgba(52, 52, 52, 0.5);
    border-radius: 5px;
    height: 100%;
    width: 36%;
}
.body_1-example h3{
    font-size: 24px;
    margin: 10px 0 15px 0;
    font-weight: 400;
}
.body_1-example li{
    font-size: 15px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    line-height: 22.5px;
}
.body_1-example span{
    color: #DC143C;
    background-color: #DEDEDE4D;
    padding: 0 4px;
}
.body_1-slide1 .body_1-tag{
    font-size: 20px;
    padding:10px;
    margin: 0 0 10px 0;
}
.body_1-slide1 span{
    color: #A52A2A;
}
.body_1-slide1 .blue{
    color: #0000CD;
}
.body_1-slide1 p{
    font-size: 15px;
    margin: 18px 0;
    line-height: 30px;
}
.body_1-slide1 .strong{
    font-weight: bold;
    color: #000;
}
table{
    font-size: 15px;
    border: 1px solid #ccc;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}
.body_1-slide th,
.body_1-slide1 td{
    width: 30%;
}
th,
td{
    padding:8px 8px 8px 16px;
    text-align: start;
}
table span{
    color: #000;
}
.body_1-slide1 .i{
    font-style: italic ;
}
.body_1-slide1 tr:nth-child(2),
.body_1-slide1 tr:nth-child(4){
    background-color:  rgb(231, 233, 235);
}
.body_1-note span{
    font-weight: bold;
    color: #000;
}
.body_1-note{
    font-size: 15px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-color: #FFFFCC;
    margin: 24px -32px;
}
.body_1-note p{
    padding: 16px 32px;
}
.body_1-ad2 p{
    font-size: 12px;
}
.body_1-html{
    background-color: rgb(231, 233, 235);
    margin: 0 !important;
}

.body_1-html,
.body_1-head,
.body_1-title,
.body-1-containers,
.body-1-container{
    border: 1px solid rgb(128, 128, 128);
    margin: 20px;
    font-size: 15px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    line-height: 35px;
}
.body-1-containers{
    background-color: #fff;
}
.body_1-slide5 table{
    width: 90%;
}
.body_1-slide5 table{
    line-height: 22.5px;
}
.body_1-slide5 table tr td:nth-child(1){
    width: 20%;
}
.body_1-slide5 tr:nth-child(2),
.body_1-slide5 tr:nth-child(4),
.body_1-slide5 tr:nth-child(6),
.body_1-slide5 tr:nth-child(8),
.body_1-slide5 tr:nth-child(10),
.body_1-slide5 tr:nth-child(12),
.body_1-slide5 tr:nth-child(14){
    background-color: rgb(231, 233, 235);
}
.body_1-slide5 a{
    color: #000;
}
.body_1-note p{
    padding: 31px 0 31px 32px;
}
.content-2__text {
    background-color: white;
    padding: 8px 12px;
    margin: 16px 0;
    border-left: 4px solid var(--primary-color);
}
pre {
    font-size: 1.5rem;
    line-height: 1.6;
    color: #973148;
    padding:8px 12px;
    margin: 16px 0;
}
.slide-2__content-2 button{
    font-size: 17px;
    padding:6px 18px;
    margin-bottom: 16px;
}
strong {
    font-size: 15px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-weight: 700;
    line-height: 22.5px;
}
.body_1-strong{
    margin-bottom: 18px;
}
.body_1-slide1 button{
    background-color: rgb(231, 233, 235);
    padding: 6px 18px;
    color:#000;
    font-size: 17px;
    line-height: 25.5px;
}
button:hover{
    background-color: #059862;
    color: #fff;
}
.body_1-slide1{
    margin-bottom: 18px;
}
.body_1-ad2{
    text-align: center;
}
.body_1-ad2 p{
    padding:0;
    margin: 0;
}
.body_1-exercise{
    background-color: rgb(45, 55, 72);
    border-radius: 15px;
    font-size: 15px;
    line-height: 22.5px;
    text-align: center;
    color: #fff;
    max-width: 1000px;
}
.body_1-exLink label{
    background-color: rgba(255, 255, 255, 0.2);
    padding:8px 16px;
    font-family: monospace;
    border-radius: 5px;
    display: block;
    width: 60%;
    margin: 0 auto;
    text-align: start;
}
.body_1-exLink span{
    margin-left: 19px;
}
.body_1-exLink label + label{
    margin-top: 4px;
}
.body_1-exercise button{
    padding:6px 18px;
    margin-bottom: 40px;
}
.body_1-exercise h2{
    padding-top:30px;
    margin-bottom: 10px;
}
.body_1-exercise p{
    margin: 0;
    padding: 0;
    font-size: 18px;
    font-family: Source Sans Pro;
    font-weight: 600;
}
.body_1-slide3 .body_1-see{
    margin-top:24px;
    padding:8px 25px;
    margin-bottom: 16px;
}
.body_1-slide3 input{
    margin-right: 29px;
}
.body_1-slide3 label:hover{
    background-color: rgba(255, 255, 255, 0.1);;
}
.body_1-slide4 button{
    padding:6px 18px;
    background-color: #2196F3;
    font-size: 17px;
}
.body_1-slide4 button:hover{
    background-color: #0d8bf2;
}
.body_1-slide5 img{
    max-width: 100%;
}
.body_1-slide6-container button{
    background-color: rgb(231, 233, 235);
    border-radius: 5px;
    padding: 20px 0;
    margin-right: 8px;
    margin-bottom: 16px;
    display: inline-block;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 15px;
    font-weight: 400;
    width: 30%;
    color: #000;
}
.body_1-slide6-container{
    margin-bottom: 16px;
}
.body_1-what li{
    font-size: 15px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    line-height: 22.5px;
}
.body_1-slide7{
    text-align: center;
    position: relative;
}
.body_1-slide7 h2{
    margin: 0;
}
.body_1-slide7 .body_1-img{
    max-width: 720px;
    max-height: 405px;
}
.body_1-slide7 .youtube{
    position: absolute;
    width: 216px;
    left: 0;
    top:45%;
    left: 40%;
}
.body_1-slide8{
    position: relative;
}
.body_1-slide8 button{
    margin-right: 32px;
}
.body_1-slide8Container{
    background-color: #282A34;
    height: 136px;
}
.body_1-slide8Container .container{
    width: 100%;
    height: 76px;
    background-image: url(../img/ad.png);
    background-repeat: no-repeat;
    background-position: left bottom;
    margin-top: 20px;
    position: relative;
}
.body_1-slide8Container .container-1{
    text-align: center;
    display: inline-block;
    position: absolute;
    left: 33.33%;
    margin-right: 201px;
}
.body_1-slide8Container .container-2{
    position: absolute;
    right: 32px;
    top: 44.67px;
    font-family: Source Sans Pro;
}
.body_1-slide8Container p{
    color: rgb(255, 244, 163);
    font-size: 17px;
    line-height: 22px;
    font-family: Source Sans Pro;
    font-weight: 600;
    margin-bottom: 5px;
    padding-top: 15px;
}
.body_1-slide8Container p + p{
    font-family: Source Sans Pro;
    font-weight: 600;
    font-size: 26px;
    color:#fff;
    margin-top: 5px;
    padding-top: 0;
}
.container-2 .navbar__acess-sign-up{
    padding:8px 16px;
    margin-right: -3px;
}
.container-2 .navbar__acess-log-in{
    padding: 8px 16px 8px 39px;

}
.container-2 .navbar__acess-form a{
    line-height: 24px;
}
.container-1 #loading{
    position: relative;
    display: block;
    width: 100%;
    max-width: 220px;
    margin: 22px auto 0;
    height: 11px;
    overflow: hidden;
    background-color: #181920;
    border-radius: 8px;

}
.container-1 .load{
    position: absolute;
    display: block;
    top: 0;
    left: 0;
    width: 44px;
    height: 100%;
    background-color: #04AA6D;
}
.body_1-slide9{
    display: flex;
    justify-content: center;
    align-items: center;
}
.body_1-slide9 img{
    width: 300px;
    height: 250px;
    padding: 0 10px 10px 0;
}
.slide--center {
    width: 100%;
    color: #fff;
}
.body_1-slide9 p{
    font-size: 12px;
    margin: 0;
}
.body_2 p{
    font-size: 12px;
    margin: 0;
}
.body_2-slide1 p{
    font-size: 12px;
}
.body_2-slide1 img,
.body_2-slide5 img{
    width: 80%;
}
.body_2-slide2 img{
    width: 80%;
}
.body_2-slide2{
    margin-top: 32px;
    margin-bottom: 20px;
}
.body_2-slide3{
    margin-bottom: 32px;
}
.body_2-slide3 a{
    font-size: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 10px 0;
    display: block;
    text-decoration: none;
    color: #000;
}
.body_2-slide3 a:hover{
    color: #059862;
}
.body_2-slide4{
    margin-bottom: 32px;
}
.body_2-slide4 a{
    width: auto;
    height: auto;
    font-size: 30px;
    margin: 0 2px;
    color: #000;
}
.body_2-slide4 .youtube:hover{
    color:red;
}
.body_2-slide4 .linkedin:hover{
    color:#2867B2;
}
.body_2-slide4 .discord:hover{
    color:#5865f2;
}
.body_2-slide4 .square:hover{
    color:#3B5998;
}
.body_2-slide4 .instagram:hover{
    color:#8a3ab9;
}
.slide--center {
    width: 100%;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}

.slide-11,
.slide-13,
.slide-15,
.slide-17 {
    background-color: var(--slide-grey-color);
    font-family: 'Source Sans Pro', sans-serif;
}

.slide-11 .slide {
    padding-top: 91px;
    padding-bottom: 96px;
}

.slide__content {
    text-align: center;
}

.slide__header {
    font-weight: 700;
}

.slide__header--11 {
    font-size: 5.2rem;
    letter-spacing: -0.4px;
    line-height: 55px;
}

.slide__sub.slide__sub--11 {
    font-weight: 600;
    margin-bottom: 20px !important;
    margin-top: 26px;
}

.slide__sub--11 {
    font-size: 2.5rem;
    color: rgb(255, 192, 199);
    line-height: 37.5px;
    margin: 19px 0;
}

.slide-11 .slide__body {
    margin-bottom: 50px;
}

.slide__items {
    list-style-type: none;
    font-size: 2rem;
    line-height: 36px;
    font-weight: 600;
    text-decoration-style: solid;
    display: inline-block;
    margin: 0;
}

.slide__items--11 {
    padding-left: 85px;
    margin-top: 15px;
}

.slide__item .slide__item-icon {
    margin-right: 15px;
    display: inline-flex;
    margin-bottom: -4.9px;
}

.slide__item-strong {
    font-weight: 700;
}

.slide__btn {
    margin: 0 auto;
    text-align: center;
    display: block;
}

.slide__btn a {
    display: block;
    text-decoration: none;
    font-weight: 600;
    color: var(--white-color);
}

.slide__btn:hover {
    background-color: var(--btn-hover-color);
    cursor: pointer;
}

.slide__btn--learn-More {
    width: 300px;
    height: 52px;
    border-radius: 25px;
    line-height: 52px;
    font-size: 2rem;
    background-color: var(--btn-color);
    margin-top: 32px !important;
}

.slide {
    font-family: 'Source Sans Pro', sans-serif;
}

.slide--center {
    width: 100%;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
}

HEAD .slide {
    font-family: 'Source Sans Pro', sans-serif;
}

.slide--center {
    width: 100%;
    color: var(--white-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.slide__sub {
    font-weight: 600;
}

.slide__content {
    text-align: center;
}

.slide__header {
    font-weight: 700;
}

.slide-11 *,
.slide-12 *,
.slide-13 *,
.slide-14 *,
.slide-15 *,
.slide-16 *,
.slide-17 *,
.slide-18 *,
.footer * {
    padding: 0;
    margin: 0;
}


.slide-12 {
    color: #000;
    background-color: var(--slide-12-color);
    padding: 80px 0 95px 0;
}

.slide-12 .slide {
    margin: 0 auto;
    text-align: center;
    display: block;
}

.slide-12 .slide__header--12 {
    font-size: 65px;
    line-height: 97.5px;
    margin-bottom: 5px;
}

.slide__sub--12.slide__sub {
    font-size: 20px;
    line-height: 30px;
    margin-bottom: 26px;
}

.slide-12 .slide__img--12:hover {
    opacity: 0.6;
}

.slide-11,
.slide-13,
.slide-15,
.slide-17 {
    background-color: var(--slide-grey-color);
    font-family: 'Source Sans Pro', sans-serif;
}

.slide-11 .slide {
    padding-top: 91px;
    padding-bottom: 96px;
}

.slide__content {
    text-align: center;
}

.slide__header {
    font-weight: 700;
}

.slide__header--11 {
    font-size: 5.2rem;
    letter-spacing: -0.4px;
    line-height: 55px;
    margin: 0;
}

.slide__sub {
    font-weight: 600;
}

.slide-11 .slide__body {
    margin-bottom: 50px;
}

.slide-11 *,
.slide-12 *,
.slide-13 *,
.slide-14 *,
.slide-15 *,
.slide-16 *,
.slide-17 *,
.slide-18 *,
.footer * {
    padding: 0;
    margin: 0;
}

.slide-11,
.slide-13,
.slide-15,
.slide-17 {
    background-color: var(--slide-grey-color);
}

.slide__content {
    text-align: center;
}

.slide__header {
    font-weight: 700;
}

.item__strong {
    font-weight: 700;
}

.slide__sub {
    font-weight: 600;
}

.slide__items {
    list-style-type: none;
    font-size: 20px;
    line-height: 36px;
    font-weight: 600;
    text-decoration-style: solid;
    display: inline-block;
    margin: 0;
}

.slide__items--11 {
    padding-left: 85px;
    margin-top: 15px;
}

.slide__item .slide__item-icon {
    margin-right: 15px;
    display: inline-flex;
    margin-bottom: -4.9px;
}

.slide__item-strong {
    font-weight: 700;
}

.slide__item .slide__item-icon {
    margin-right: 15px !important;
    display: inline-flex;
    margin-bottom: -4.9px;
}

.slide__btn {
    margin: 0 auto;
    text-align: center;
    display: block;
}

.slide__btn a {
    display: block;
    text-decoration: none;
    font-weight: 600;
    color: var(--white-color);
}

.slide__btn:hover {
    background-color: var(--btn-hover-color);
    background-color: var(--btn-hover-color);
    cursor: pointer;
}

.slide__btn--learn-More {
    width: 300px;
    height: 52px;
    border-radius: 25px;
    line-height: 52px;
    font-size: 2rem;
    background-color: var(--btn-color);
}

.slide-14 {
    background-color: var(--slide-14-color);
}

.slide__img--14:hover {
    opacity: 0.8;
    cursor: pointer;
}

/* app */

.app {
    position: relative;
}

.content {
    margin-top: -2px;
    width: 100%;
}

#test {
    position: fixed;
}

.navbar {
    margin: 0;
    /* padding-right: 16px; */
    width: 100%;
    display: flex;
    justify-content: space-between;
    /* position: absolute; */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000000;
    background-color: var(--white-color);
    height: 54px;
}

.navbar-body-left {
    display: flex;
    align-items: center;
    z-index: 2;
    position: relative;
}

.navbar__home {
    padding: 0px 19px;
}

.navbar__home:hover {
    opacity: .8;
}

.navbar__home-img {
    height: 46px;
    margin-top: 8px;
}

.navbar__selection {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1rem;
    padding: 20px 20px 14px;
}

.navbar__selection:hover {
    background-color: #04AA6D;
    color: var(--white-color);
}

.navbar__selection-item {
    display: flex;
    align-items: center;
    margin: 0;
}
.navbar__selection-text {
    margin: 0;
    margin-right: 4px;
    font-weight: 400;
    font-size: 16px;
}

.navbar__search {
    height: 36px;
    width: 178px;
    border: 1px solid #cbcbcb;
    border-radius: 26px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 10px 0px;
    margin-left: 8px;
}

.navbar__search-icon {
    font-size: 1.6rem;
    padding: 10px;
    border-radius: 28px;
}

.navbar__search-input {
    width: 100%;
    height: 34px;
    border-top-left-radius: 25px;
    border-bottom-left-radius: 25px;
    border: none;
    margin-left: 12px;
    outline: none;
}

.navbar__search-input::placeholder {
    font-style: italic;
}

.navbar__search-icon:hover {
    background-color: #f1f1f1;
    cursor: pointer;
}

.navbar__dark-mode {
    margin-left: 6px;
    margin-right: 8px;
}

.navbar__dark-mode-icon {
    padding: 10px 10px;
    font-size: 1.6rem;
}

.navbar__dark-mode-icon:hover {
    background-color: #f1f1f1;
    cursor: pointer;
    border-radius: 50%;
}

.navbar-body-right {
    display: flex;
    /* align-items: center; */
    overflow: hidden;
}

.navbar__service-list {
    display: flex;
    align-items: center;
    margin-right: 10px;
}

.navbar__service {
    display: flex;
    align-items: center;
    padding: 6px 3px;
    border-radius: 25px;
    height: 38px;
    animation: opacity 0.1s ease;
}

.navbar_right-icon {
    font-size: 1rem;
    color: #b48ff6;
}

.navbar_right-text {
    font-size: 1.2rem;
    margin-left: 4px;
}

.navbar__service:hover {
    background-color: #f1f1f1;
    cursor: pointer;
}

.navbar__access {
    display: flex;
    align-items: center;
    min-width: 154px;
}

.navbar__acess-form {
    font-size: 1.6rem;
    /* padding: 8px 16px; */
    text-decoration: none;
    display: flex;
    margin-right: 16px;
}

.navbar__acess-sign-up {
    text-decoration: none;
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 8px 16px;
    border-radius: 25px;
    z-index: 1;
    padding-right: 20px;
}

.navbar__acess-log-in {
    background-color: #d9eee1;
    text-decoration: none;
    color: var(--black-color);
    padding: 8px 23px 8px 30px;
    margin-left: -24px;
    border-radius: 25px;
}

.navbar__acess-sign-up:hover {
    background-color: #059862;
}

.navbar__acess-log-in:hover {
    background-color: #059862;
    color: var(--white-color);
}


/* Modal */

.modal {
    position: fixed;
    top: 54px;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
    display: none;
    z-index: 10000;
}

.modal-services,
.modal-certificates,
.modal-tutorials,
.modal-exercises {
    width: 100%;
    background-color: #282A34;
    padding-top: 34px;
    padding-bottom: 34px;
    display: none;
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
}

.modal-tutorials__content {
    max-height: 100%;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    width: 950px;
    padding: 0 16px;
}

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

.head {
    color: #FFF4A2;
    font-size: 3.2rem;
    width: 37%;
}

.filter {
    background-color: #464645;
    width: 314px;
    height: 46px;
    border-radius: 25px;
    overflow: hidden;
    position: relative;
    z-index: 1;
}

.filter__search {
    font-size: 1.6rem;
    background-color: #464645;
    outline: none;
    border: none;
    width: 100%;
    height: 100%;
    color: var(--white-color);
    padding-left: 22px;
}

.filter__search::placeholder {
    font-style: italic;
    color: var(--white-color);
}

.fiter__icon {
    font-size: 1.6rem;
    color: var(--white-color);
    padding: 15px 19px;
    position: absolute;
    right: 0px;
    top: 0px;
    border-radius: 50%;
}

.fiter__icon:hover {
    background-color: rgba(52, 52, 52, 0.5);
    cursor: pointer;
}

.close {
    position: absolute;
    display: block;
    top: 10px;
    right: 10px;
    width: 64px;
    height: 64px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
}

.close:hover {
    cursor: pointer;
    background-color: #fbfbfb;
    color: #000;
}

.close__icon {
    font-size: 4rem;
    color: var(--white-color);
    padding: 16px;
}

.close__icon:hover {
    color: #000;
}

.list-left-top {
    margin-bottom: 52px;
}

.list-left__header {
    color: #fdf4a1;
    font-size: 2.4rem;
    margin-bottom: 36px;
    font-weight: 500;
}

.list-left__list {
    padding: 0;
}

.list-left__list-item {
    list-style: none;
    margin: 16px 0;
}

.list-item__head {
    font-size: 1.8rem;
    color: var(--white-color);
    padding: 2px 6px;
    margin-bottom: 32px;
    padding-bottom: 7px;
}

.list-item__head:hover {
    background-color: #ccc;
    color: var(--black-color);
    border-radius: 4px;
}

.list-left__list-item a:first-child {
    text-decoration: none;
}

.list-item-link {
    font-size: 1.2rem;
    color: #fdf4a1;
    padding: 2px 6px;
    margin-bottom: 20px;
}

.list-item-link:hover {
    background-color: #059862;
    color: var(--white-color);
    border-radius: 4px;
}

.mdt-course-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-left: 8px;
}

.list-item__head-learn {
    font-size: 1.5rem
}

.list-left__list--hot {
    padding: 3px 10px;
    font-size: 1.1rem;
    background-color: #d7242b;
    border-radius: 25px;
    border: 1px solid var(--black-color);
    margin-bottom: 3px;
}

.list-left__list--new {
    padding: 3px 10px;
    font-size: 1.1rem;
    background-color: #00ab6b;
    border-radius: 25px;
    border: 1px solid var(--black-color);
}

.select {
    background-color: #272b35;
    color: var(--white-color);
}

.ex_and_quiz {
    margin-top: 52px;
}

.ex,
.quiz {
    height: 32px;
    background-color: #20232b;
    border: 1px solid grey;
    border-radius: 5px;
    margin-bottom: 16px;
    text-align: center;
    line-height: 32px;
}

.ex__link,
.quiz__link {
    font-size: 1.8rem;
    color: var(--white-color);
    /* padding: 5px 19px; */
    text-decoration: none;
    font-weight: 400;
    border-radius: 4px
}

.quiz__link {
    padding: 4px 39px;
}

.modal-services__note {}

.modal-services__note-text {
    font-size: 1.7rem;
    color: var(--white-color);
    line-height: 3.2rem;
    padding: 30px 13px 15px 13px;
}

.modal-services__column {
    display: flex;
    justify-content: space-around;
    padding: 8px 12px;
}

.modal-services__row {
    background-color: #3d404a;
    width: 290px;
    border-radius: 5px;
    padding: 8px 16px;
}

.row__heading {
    font-size: 2rem;
    color: #fdf5a5;
    margin: 28px 8px;
    display: flex;
    justify-content: space-between;
}

.row__text {
    font-size: 1.4rem;
    color: var(--white-color);
    margin-bottom: 28px;
}

.row__text-2 {
    margin-top: -20px;
}

.modal-services__socials {
    padding: 100px 17px 20px;
}

.modal-services__socials-icon {
    font-size: 2.4rem;
    color: var(--white-color);
    padding: 12px 16px;
    margin-right: 10px;
    height: 50px;
    display: inline-flex;
    align-items: center;
    border-radius: 5px;
}

.modal-services__socials-icon:hover {
    background-color: #fbfbfb;
    color: var(--black-color);
    cursor: pointer;
}

.row__img {
    height: 35px;
    transform: translateY(-18px);
}

.modal-services__row--hover:hover {
    background-color: #000;
    cursor: pointer;
}

.ex_quiz--hover:hover .ex__link,
.ex_quiz--hover:hover .quiz__link {
    color: var(--black-color) !important;
    background-color: #ccc;
    cursor: pointer;
}

.ex__link-certificates--padding {
    padding: 5px 29px;
}

.ex__link-exercises--padding {
    padding: 5px 19.5px;
}

.quiz__link-exercises--padding {
    padding: 5px 40px;
}


/* Header */

.header {
    margin-top: 54px;
    width: 100%;
    background-color: #282b35;
    display: flex;
    z-index: 2;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
}
.header__item,
.navbar__selection-text{
    font-family: Source Sans Pro;
}
.header__list {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-around;
    overflow-x: auto;
    white-space: nowrap;
    padding: 0 0px;
    margin-bottom: 0;
    overflow-x: auto;
    white-space: nowrap;
    -ms-overflow-style: none;
    scrollbar-width: none;
    margin: 0;
}

.header__list::-webkit-scrollbar {
    display: none;
    /* Ẩn thanh cuộn trong trình duyệt WebKit (Chrome, Safari) */
}

.header__item:hover {
    background-color: #000;
    cursor: pointer;
}

.header__link {
    text-transform: uppercase;
    text-decoration: none;
    font-size: 1.5rem;
    padding: 8px 15px;
    display: inline-block;
    width: 100%;
    color: var(--white-color);
    font-weight: 300;
}

.header::-webkit-scrollbar {
    height: 8px;
    width: 8px;
}

.header::-webkit-scrollbar-thumb {
    background-color: #555;
    border-radius: 10px;
}

.scroll-btn {
    background-color: #292a35;
    color: var(--white-color);
    border: none;
    padding: 0px 12px;
}

.scroll-btn:hover {
    background: linear-gradient(to left, #000 95%, transparent 100%);
    cursor: pointer;
}

.slide__btn--learn-More {
    width: 300px;
    height: 52px;
    border-radius: 25px;
    line-height: 52px;
    font-size: 20px;
    background-color: var(--btn-color);
}


/* Content */


/* Slide 1 */

.slide-1 {
    background-image: url(../img/backGroundSlide1.webp), url(../img/backgroundslide1.2.webp);
    background-repeat: no-repeat, repeat;
    background-position: 90% 60%, center center;
    /*left top*/
    padding-top: 90px;
    padding-bottom: 90px;
    margin-top: 88px;
}

.slide-1__content {
    text-align: center;
    max-width: 980px;
    padding-left: 90px;
    padding-right: 90px;
    margin: auto;
}

.slide-1__heading {
    font-size: 7rem;
    font-weight: 700;
    color: var(--white-color);
    line-height: 106px;
}

.slide-1__text {
    margin-top: 30px;
    margin-bottom: 10px;
    font-size: 2.3rem;
    color: #ffea8c;
    font-weight: 700;
    margin-bottom: 42px;
}

.slide-1__search {}

.slide-1__search-input {
    width: 48%;
    height: 48px;
    margin-right: -3px;
    border: none;
    border-top-left-radius: 25px;
    border-bottom-left-radius: 25px;
    padding-left: 24px;
    font-size: 1.7rem;
    border: 1px solid #282A35;
    border-right: 1px solid #04AA6D;
    background-color: var(--white-color);
    outline: none;
}

.slide-1__search-btn {
    width: 12%;
    height: 48px;
    transform: translateY(0px);
    border: none;
    font-size: 1.7rem;
    background-color: var(--primary-color);
    color: var(--white-color);
    border-top-right-radius: 25px;
    border-bottom-right-radius: 25px;
    margin-bottom: 42px;
}

.slide-1__search-btn:hover {
    background-color: #059862;
    color: var(--white-color);
    cursor: pointer;
}

.slide-1__search-icon {
    color: var(--white-color);
}

.slide-1__link {
    font-size: 2.4rem;
    color: var(--white-color);
}

.slide-1__link:hover {
    color: #ffea8c;
}


/* Slide 2, 3, 4, 5, 6 */

.slide-2,
.slide-3,
.slide-4,
.slide-5,
.slide-6 {
    color: var(--black-color);
    display: flex;
    padding: 90px 100px;
    justify-content: space-evenly;
    flex-wrap: wrap;
}

.slide-2 {
    background-color: #d9eee1;
}

.slide-3 {
    background-color: #fef4a1;
}

.slide-4 {
    background-color: #282b35;
}

.slide-5 {
    background-color: #f3ecea;
}

.slide-6 {
    background-color: #95d4d3;
}

.slide-2__content-1,
.slide-3__content-1,
.slide-4__content-1,
.slide-5__content-1,
.slide-6__content-1 {
    text-align: center;
    padding: 30px 0;
}

.content-1__heading {
    font-size: 10rem;
    color: var(--black-color);
    line-height: 10rem;
    font-weight: 700;
}

.slide-4__content-1 .content-1__heading {
    font-size: 7rem;
    color: var(--white-color);
}

.content-1__text {
    font-size: 2rem;
    margin: 24px 0;
    font-weight: 700;
    margin-bottom: 42px;
}

.slide-4__content-1 .content-1__text {
    color: var(--white-color);
}

.content-1__link-1,
.content-1__link-2,
.content-1__link-3,
.content-1__link-4 {
    text-decoration: none;
    font-size: 1.8rem;
    padding: 13px 16px;
    display: block;
    font-weight: 500;
}

.content-1__link-1:hover {
    background-color: #059862;
}

.content-1__link-2:hover {
    background-color: #fff080;
}

.content-1__link-3:hover {
    background-color: #000;
}

.content-1__link-4:hover {
    background-color: #ffb3bb;
}

.content-1__link {
    width: 200px;
    margin: 24px auto;
}

.content-1__link-1 {
    color: var(--white-color);
    background-color: var(--primary-color);
    border-radius: 25px;
}

.content-1__link-2 {
    color: var(--black-color);
    background-color: #fef4a1;
    border-radius: 25px;
}

.content-1__link-3 {
    color: var(--white-color);
    background-color: #282b35;
    border-radius: 25px;
}

.slide-4__content-1 .content-1__link-3 {
    background-color: var(--white-color);
    color: var(--black-color);
}

.content-1__link-4 {
    color: var(--black-color);
    background-color: #ffc0c7;
    border-radius: 25px;
}



/* .slide-2__content-2 {
    padding: 16px 16px 16px 16px;
}

.slide-3__content-2 {
    padding: ;
} */






.content-2__link {
    color: var(--white-color);
    font-size: 1.8rem;
    width: 200px;
    text-decoration: none;
    display: block;
}

.content-2__btn {
    padding: 11px 16px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 25px;
}

.content-2__btn:hover {
    background-color: #059862;
    cursor: pointer;
}


/*slide 7 den 10*/

.program-a,
.program-b,
.program-c,
.program-d {
    margin: 0;
    padding: 0;
}

.program-a {
    background-color: #2c2f38;
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 0;
    padding-top: 80px;
}

.program-a .container1 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 40px 90px;
    margin-bottom: 40px;
    width: 90%;
}

.program-a .container2 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 40px 90px;
    width: 90%;
    line-height: 1.6;
}

.card1,
.card2 {
    background-color: #ffc0c7;
    padding: 40px 4px;
    border-radius: 4px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-weight: 600;
}


.card2 {
    font-size: 3rem;
}

.card1:nth-of-type(2) {
    background-color: #fef4a1;
}

.card1:nth-of-type(3) {
    background-color: #f3ecea;
}

.card1:nth-of-type(4) {
    background-color: #d9eee1;
}

.card1:nth-of-type(5) {
    background-color: #95d4d3;
}

.card1:nth-of-type(6) {
    background-color: #e7e9eb;
}

.card1:nth-of-type(7) {
    background-color: #e9b2b9;
}

.card1:nth-of-type(8) {
    background-color: #e9e098;
}

.card h2,
.card1 h2 {
    margin: 0;
    font-size: 3rem;
    color: var(--black-color);
    margin: 16px;
}

.card1 p {
    color: #292525;
    margin: 15px 0;
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 32px;
}

.card2:nth-of-type(1),
.card2:nth-of-type(6),
.card2:nth-of-type(11),
.card2:nth-of-type(16),
.card2:nth-of-type(21),
.card2:nth-of-type(26),
.card2:nth-of-type(31),
.card2:nth-of-type(36) {
    background-color: #f7f2f0;
}

.card2:nth-of-type(2),
.card2:nth-of-type(7),
.card2:nth-of-type(12),
.card2:nth-of-type(17),
.card2:nth-of-type(22),
.card2:nth-of-type(27),
.card2:nth-of-type(32) {
    background-color: #84a9a5;
}

.card2:nth-of-type(3),
.card2:nth-of-type(8),
.card2:nth-of-type(13),
.card2:nth-of-type(18),
.card2:nth-of-type(23),
.card2:nth-of-type(28),
.card2:nth-of-type(33) {
    background-color: #63c3b9;
}

.card2:nth-of-type(4),
.card2:nth-of-type(9),
.card2:nth-of-type(14),
.card2:nth-of-type(19),
.card2:nth-of-type(24),
.card2:nth-of-type(29),
.card2:nth-of-type(34) {
    background-color: #f5c2c2;
}

.card2:nth-of-type(5),
.card2:nth-of-type(10),
.card2:nth-of-type(15),
.card2:nth-of-type(20),
.card2:nth-of-type(25),
.card2:nth-of-type(30),
.card2:nth-of-type(35) {
    background-color: #f1e1a6;
}

.buttonA {
    background-color: #333;
    color: #fff;
    padding: 0 16px;
    text-decoration: none;
    border-radius: 20px;
    display: inline-block;
    margin-top: 20px;
    font-size: 2rem;
    width: 244px;
    height: 43px;
    line-height: 43px;
    margin: auto;
}

.buttonA:hover {
    background-color: #555;
}

.container3 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-gap: 40px 90px;
    width: 90%;
    margin-top: 40px;
    padding-bottom: 80px;
}

.card3 {
    display: flex;
    text-align: center;
    justify-content: center;
    align-items: center;
    height: 150px;
    font-size: 3rem;
    color: black;
    font-weight: bold;
    border-radius: 10px;
}

.card1--hover:hover,
.card2:hover,
.card3:hover {
    opacity: 0.8;
    cursor: pointer;
}

.excel {
    background-color: #88c9c5;
}

.dsa {
    background-color: #f1e1a6;
    line-height: 1.2;
}

.ml {
    background-color: #f5c2c2;
}

.ai {
    background-color: #d7d1ce;
}


/*slide 8*/

.program-b {
    font-family: Arial, sans-serif;
    background-color: #2c2f38;
    color: #fff;
    text-align: center;
    margin: 0;
}

h1.program-B {
    font-size: 6.5rem;
    font-weight: bold;
    padding-top: 20px;
    text-align: center;
    padding-bottom: 20px;
    line-height: 1.3;
}

p.program-B {
    font-size: 2rem;
    text-align: center;
}

.pro-b {
    justify-content: center;
    align-items: center;
    padding: 20px;
    margin-top: 0%;
    background-color: #2c2f38;
    text-align: center;
}

.button1.program-b {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    margin-left: 250px;
}

.buttonbe {
    background-color: #63b065;
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: left;
    text-decoration: none;
    font-size: 16px;
    margin: 10px;
    cursor: pointer;
    border-radius: 5px;
    font-weight: bold;
    font-size: medium;
    width: 400px;
}

.buttonbe.backend {
    background-color: #ebcd80;
    color: #000000;
}


/*slide 9*/

.program-c {
    font-family: Arial, sans-serif;
    background-color: #2c2f38;
    color: #fff;
    text-align: center;
    margin: 0;
}

h1.program-C {
    font-size: 3.5rem;
    padding-top: 40px;
    padding-bottom: 25px
}

p.program-C {
    font-size: 1.75rem;
    padding-top: 5px;
}

.pro-c {
    padding: 20px;
    margin-top: 0%;
    background-color: #2c2f38;
    padding-bottom: 20px;
}

a.program-c {
    color: #f47da6;
    text-decoration: none;
    transition: color 0.3s ease;
}

a.program-c:hover {
    color: #12ee79;
    text-decoration: underline;
}

.button-container {
    display: flex;
    justify-content: center;
    margin: 30px 0 0;
    padding-top: 35px;
    padding-bottom: 50px;
}

.learn-more-button {
    background-color: #30a15f;
    color: #ffffff;
    border: none;
    padding: 17px 104px;
    font-size: 1.75rem;
    cursor: pointer;
    border-radius: 30px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.learn-more-button:hover {
    background-color: #059862;
}

/* slide-17 */

.slide-17 .slide {
    max-width: 1225px;
    min-width: 210px;
    margin: 0 auto;
    position: relative;
    padding: 0 60px 64px 60px;
    margin-bottom: 85px;
}

.slide-17 .slide__sub,
.slide-17 .slide__header {
    font-weight: 600;
}



.slide-17 .slide__content {
    color: rgb(255, 192, 199);
    text-align: start;
}


.slide-17 .slide__btn--learn-More {
    width: 204.85px;
    height: 64px;
    margin-bottom: 16px;
    border-radius: 50px;
    margin-left: 0%;
}

.slide-17 .slide__btn--learn-More a {
    line-height: 64px;
}


/* footer */
.footer{
    position: absolute;
    left: 0;
    right: 0;
}
.footer__main {
    position: relative;
    background-image: url('../img/footer-background.webp'),url('../img/backgroundslide1.2.webp');
    background-color: var(--slide-grey-color);
    background-repeat: no-repeat;
    background-position: right bottom, center center;
    font-size: 12px;
    width: 100%;
    font-family: Source Sans Pro, sans-serif;
    font-weight: 600;
    padding: 40px 80px 400px 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}

.footer__container {
    max-width: 1200px; /* Đặt giới hạn độ rộng */
    width: 100%; /* Đảm bảo phần tử con chiếm đủ chiều rộng */
    padding: 0 20px; /* Đệm để tránh nội dung sát biên */
}

@media screen and (max-width: 1200px) {
    .footer {
        background-size: 500px, auto;
    }
    .footer__link-1,
    .footer__header-logo {
        padding-left: 2.6%;
        padding-right: 2.6%;
    }
    .footer__Top {
        padding-right: 8%;
    }
}

@media screen and (max-width: 992px) {
    .footer__main {
        padding: 40px 80px 400px 80px !important;
    }
    .footer__header {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .footer__header-logo {
        padding: 10px 20px 10px 20px !important;
    }
    .footer__link-1 {
        width: 100%;
        float: none;
        text-align: center;
        padding: 10px 20px!important;
        font-size: 20px;
        display: block;
        margin: 0 auto;
    }
    .footer_body {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .footer__title {
        margin: 40px 0 20px 0 !important;
    }
    .footer__Top {
        width: 100%;
        /* float:none; */
        margin: 0 auto;
        font-size: 16px;
        line-height: 20px;
        padding: 0 !important;
        align-items: center;
        flex-basis: 100%;
        text-align: center;
    }
    .footer__Top h5 {
        font-size: 26px;
        margin-top: 40px;
    }
    .footer__footer {
        text-align: center;
        padding: 0 !important;
    }
    */ .footer__delete-br {
        display: none;
    }
    .footer__main {
        padding-bottom: 400px;
    }
    .footer__icon {
        text-align: center;
    }
    .footer__break {
        margin-top: 16px !important;
        display: block !important;
    }
}

@media screen and (max-width: 992px) {
    .footer {
        background-image: url('../img/footer-background.webp'), url('../img/background-star.png');
        background-color: #282A35;
        background-repeat: no-repeat, repeat;
        background-position: center bottom, left top;
    }
}

@media screen and (max-width: 1200px) {
    .footer__main {
        background-size: 500px, auto;
    }
}

.footer__header {
    display: flex;
    overflow: hidden;
    flex-wrap: wrap;
}

.footer__header-logo {
    padding: 30px 10px 30px 40px;
}

.footer__header-logo #logo {
    font-size: 46px;
    width: 49px;
    height: 46px;
}

.footer__link-1,
.footer__header-logo {
    text-transform: uppercase;
    width: auto;
    float: left;
}

.footer__link-1 a,
.footer__header-logo a {
    text-decoration: none;
    color: #FFF4A3;
    line-height: 22.5px;
    font-size: 15px;
}

.footer__link-4:hover,
.footer__size-15:hover,
.footer__link-1 a:hover,
.footer__header-logo a:hover {
    text-decoration: underline;
    color: #FFF4A3;
    cursor: pointer;
}

.footer__link-1:hover a,
.footer__header-logo:hover a {
    text-decoration: underline;
    color: #FFF4A3;
}

.footer__link-1 {
    padding: 40px 30px;
}

.footer__break {
    margin: 0;
    display: inline;
}

.footer__body {
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
}

.footer__main .footer__title {
    font-size: 18px;
    margin: 10px 0 20px 0;
}

.footer__link-2 {
    display: block;
}

.footer__link-2:hover,
.footer__size-20:hover,
.footer__Top-4 .footer__title:hover {
    text-decoration: underline;
    color: #FFF4A3;
    text-decoration: none;
}

.footer__size-15 {
    font-size: 15px;
}

.footer__Top {
    float: left;
    width: auto;
    padding: 0 135px 0 40px;
}

.footer__Top-4 {
    padding-right: 0;
}

.footer__icon {
    display: flex;
    /* font-size: 20px; */
    padding: 20px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 16px;
    /* justify-content: center; */
}

.footer__link-3 {
    margin-right: 16px;
    display: block;
    font-size: 2rem;
    padding: 20px;
}

.footer__link-3 {
    margin-right: 10px;
}

.footer__a {
    color: rgb(221, 221, 221);
    text-decoration: none;
}

.footer__footer {
    padding-left: 40px;
}

.footer__link-4 {
    color: rgb(221, 221, 221);
}

.footer__box-icon-1 {
    display: flex;
}

.footer__box-icon-2 {
    display: flex;
    flex-wrap: wrap;
}

.split {
    margin-bottom: -8px;
}