:root  {
    --main-color: #0c1959;
    --main-greeen: #27AE60;
    --main-red: #EB5757;
    --main-grey: rgba(28, 29, 34, 0.5);
    --main-black-opacity-45: rgba(0, 0, 0, 0.45);
    --main-black-opacity-85: rgba(0, 0, 0, 0.85);
}
html {
    font-size: 16px;
}
html body{
    line-height: 1.2;
}

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

p {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: inherit;
}

.modal-dialog {
    height: 100vh;

    display: flex;
    align-items: center;
}


.mobile-full-btn {
    width: 100%;
    height: 72px;
    background: #E6E6E6;
    padding: 16px;
    position: absolute;
    bottom: 0;
    left: 0;
    display: none;
}

.mobile-full-btn button {
    width: 100%;
    height: 40px;
    outline: none;
    border: none;
}

.btn-success-modal {
    font-weight: 400;
    font-size: 14px;
    line-height: 22px;
    padding: 4px 15px;
    color: white!important;
    background-color: blueviolet;
}

.btn-close-modal {
    font-weight: 400;
    font-size: 14px;
    line-height: 22px;
    padding: 4px 15px;
    background: #FFFFFF;
    border: 1px solid #D9D9D9;
}

.form-check-input {
    border-radius: 50%;
}

.list-home-work {
    margin-bottom: 0;
}

.form-check {
    margin-bottom: 8px;
}


.fs-16 {
    font-size: 1rem;
}

.fs-20 {
    font-size: 1.25rem;
}

.fs-24{
    font-size: 24px;
}

.fs-32{
    font-size: 32px;
}

.fs-48{
    font-size: 48px;
}



.fw-4 {
    font-weight: 400;
}

.fw-5 {
    font-weight: 500;
}

.fw-6 {
    font-weight: 600;
}



.color-success {
    color: var(--main-greeen);
}

.color-error {
    color: var(--main-red);
}
.alert-messages .alert{
    width: 30%;
    text-align: center;
    margin-left: 70%;
}



.link-pages {
    font-weight: 400;
    font-size: 14px;
    line-height: 22px;
    color: var(--main-black-opacity-45);
}

.link-pages__avtive {
    font-weight: 400;
    font-size: 14px;
    color: var(--main-black-opacity-85);
}

.title-page-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.title-page {
    font-weight: 500;
    font-size: 1.75rem;
    line-height: 28px;
    margin-top: 0.875rem;
    color: var(--main-black-opacity-85);
}

.center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link.active {
    background-color: transparent;
    border-color: transparent;
    border-bottom: 2px solid var(--main-color);
    padding: 8px 2rem;
}

.sidebar-columns {
    width: 367px;
    display: flex;
    position: relative;
}

.sidebar-menu {
    width: 90px;
    height: 100vh;
    padding: 48px 1px 0 21px;
    background: var(--main-color);

    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1;

    transition: all .3s;
}
.sidebar-menu span {
    width: 180px;
    display: none;
}

.sidebar-menu:hover {
    width: 250px;
}
.sidebar-menu:hover .logo-short{
    display: none;
}
.sidebar-menu .logo-short{
    display: block;
    max-height: 40px;
    color: white;
}
.sidebar-menu:hover .logo-full{
    display: block;
}
.sidebar-menu .logo-full{
    display: none;
    max-height: 40px;
    color: white;
}
.sidebar-menu:hover span {
    display: block;
}
.sidebar-menu:hover .sidebar-menu__item {
    width: 228px;
}

.sidebar-menu__nav {
    margin-top: 48px;
    list-style: none;
}

.sidebar-menu__nav__view {
    transform: translateX(0px)!important;
}

.sidebar-menu__item__exit {
    position: absolute;
    bottom: 3rem;
}

.sidebar-menu__item {
    margin-bottom: 8px;
}

.sidebar-menu__item-link {
    display: flex;
    align-items: center;
}

.sidebar-menu__item-img {
    width: 48px;
    height: 48px;
    margin-right: 8px;
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    transition: all .3s;
    cursor: pointer;
}

.sidebar-menu__item span {
    color: white;
}

.sidebar-menu__item:hover .sidebar-menu__item-img {
    background: rgba(255, 255, 255, 0.1);
}
.sidebar-menu__item:hover img {
    fill: white;
}


.sidebar-column {
    width: 100%;
    min-height: 100vh;
    margin-left: 90px;

    border-right: 1px solid #E6E6E6;
}

.sidebar-column__title {
    padding: 1.5rem 0 1.5rem 2rem;

    font-weight: 700;
    font-size: 30px;

}

.sidebar-column__item:hover {
    background-color: #a7a7a7;
}

.sidebar-column__item__content {
    background: #F6F6F6;
    border-radius: 18px;
    margin: 8px 1.5rem;
    padding: 0.65rem 1.25rem;

    font-weight: 400;
    font-size: 1rem;
}

.sidebar-column__list {
    z-index: 0;
}

.sidebar-column__text {
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;

    border: none;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;

    color: var(--main-grey);
    background-color: transparent;
}

.sidebar-column__message {
    border-radius: 8px;
    margin: 1rem 2.125rem 1rem 1.5rem;
    padding: 10px;

    background: #F9F9F9;
}

.sidebar-column__message__title {
    font-weight: 500;
    font-size: 1rem;
    margin-bottom: 10px;
}

.sidebar-column__message__text {
    font-weight: 400;
    font-size: 1rem;
}

.column-main {
    padding-left: 1.5rem;
}

.column-main__header {
    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 1.563em 3.5rem;
}

.column-main__header__title {
    font-weight: 700;
    font-size: 20px;
    line-height: 100%;
}

.column-main__header-info {
    display: flex;
    align-items: center;
}

.sidebar-icon {
    width: 22px;
    margin-right: 48px;

    display: none;
    position: relative;
}

.burger-mobile {
    display: none;
}

.main-header-icon {
    display: none;
}

.header-icon {
    width: 22px;
    margin-right: 1rem;
    
    position: relative;
}

.header-icon__bell-active {
    position: absolute;
    top: 13px;
    right: 0px;
}

header .sidebar-menu .lang-btn.hv-circle {
    display: none;
}

header.show-lang.sidebar-menu:hover .lang-btn {
    display: flex;
}

.header-panel-2 {
    display: flex;
}

header .hv-circle:hover {
    background: rgba(217, 217, 217, 0.2);
}
.hv-circle{
    display: none;
}
.sidebar-menu:hover .hv-circle.lang-btn-active{
    display: flex;
}

.header-contact{
    margin-left: 13px;
    display: flex;
}

.sidebar-menu:hover .hv-circle{
    display: none;
}

.sidebar-menu:hover .hv-circle {
    width: 40px;
    height: 41px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
}

.empty-page {
    height: 85vh;
}

.empty-page__content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.empty-page___title {
    font-weight: 700;
    font-size: 2rem;
    text-align: center;
}

.empty-page___text {
    font-weight: 400;
    font-size: 1.25rem;
    text-align: center;
}

.empty-page___button {
    margin-top: 2.9rem;
    padding: 6px 42px;

    color: white!important;
    background-color: var(--main-greeen);
}

.list-lesson__link{
    max-width: 905px;
    padding: 1rem 2rem;
    border-bottom: 1px solid #E6E6E6;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.list-lesson__title {
    font-weight: 500;
    font-size: 1rem;
    line-height: 2rem;
}

.list-lesson__text {
    font-weight: 400;
    font-size: 13px;
    line-height: 131%;
    color: var(--main-black-opacity-45);
}

.list-lesson__link span {
    font-weight: 400;
    font-size: 14px;
}

.list-theme__title {
    font-weight: 700;
    font-size: 1.5rem;
    margin: 2.438rem 0 1.5rem 0;
}

.list-theme__list li {
    margin-bottom: 1rem;
}

.list-theme__list {
    padding-left: 1.5rem;
    list-style-type: '•   ';
}

.list-teme__item {
    font-weight: 400;
    font-size: 1rem;
}

.examination-list {
    max-width: 815px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.examination-list__date {
    padding: 0.5rem 1rem;
    border-radius: 8px;

    background: #F5F6F7;
}

.examination-list__content {
    padding: 1.125rem 1.25rem;

    display: flex;
}

.examination-list__content__img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-right: 1rem;
    background: #F3F4F5;
}

.examination-list__content__title {
    font-weight: 400;
    font-size: 1rem;
    line-height: 22px;
    color: #172A3F;
}

.examination-list__content__text {
    font-weight: 400;
    font-size: 13px;
    line-height: 18px;
    color: #6D7986;
}

.list-lesson__select-date {
    box-shadow: 0px 2px 0px rgba(0, 0, 0, 0.016);
    border-radius: 2px;
    background: #FFFFFF;
    border: 1px solid #D9D9D9;
    padding: 5px 12px;
    margin-top: 12px;
}

.list-home-work-test__title {
    font-weight: 700;
    font-size: 24px;
    margin-bottom: 1rem;
}

.list-home-work-test__info {
    max-width: 440px;
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 4rem;
    background: #F9F9F9;
}

.list-home-work-test__date {
    font-weight: 400;
    font-size: 16px;
    margin-bottom: 4rem;
}

.list-home-work-test__list {
    list-style: none;
}

.list-home-work-test__item {
    margin-bottom: 2rem;
}

.student-test-content {
    max-width: 720px;
    padding: 1.688rem 1rem 1rem 1rem;
    border-radius: 8px;
    margin-top: 3rem;
    
    background: #FBFBFB;
}

.student-test-content__img {
    margin-bottom: 39px;
}

.student-test-content__title {
    font-weight: 400;
    font-size: 20px;
    color: var(--main-color);
}

.invite-section-content {
    padding: 3rem 4rem;
}

.invite-section__button {
    border-radius: 32px!important;
    background: white!important;
}

.invite-section-content .tab-content {
    max-width: 536px;
}

.invite-section-content .nav .active {
    background: linear-gradient(85deg, #6E41AA 0%, #5538FF 100%)!important;
}

.invite-section-content .nav .nav-item {
    border-radius: 32px!important;
    background: linear-gradient(85deg, #6E41AA 0%, #5538FF 100%)!important;
    padding: 2px;
    margin-right: 1.5rem;
}

.invite-section__price-block {
    width: 326px;
    border-radius: 1rem;
    border: 1px solid #323847;
    padding: 1rem 2rem;
    margin-top: 12.5rem;
}

.invite-section__price-block__title {
    font-size: 16px;
    font-weight: 400;
    margin-bottom: 8px;
}

.invite-section__price-block__sum {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 1.875rem;
}

.invite-section__price-block__button {
    border-radius: 32px;
    background: var(--green-1, #219653);
    padding: 1rem 1.5rem;
    color: white;
    border: none;
}

.tabs-items__title {
    font-size: 20px;
    font-weight: 500;
}

.tabs-items__text {
    font-size: 16px;
    font-weight: 400;
}

.invite-section__header {
    background: #323847;
    color: white;
}

.invite-section__tabs .title {
    font-weight: 700;
    margin-bottom: 3rem;
}
.exercise__wrapper {
    max-width: 720px;
    height: auto;
    background: #FBFBFB;
    border-radius: 12px;
    margin-top: 32px;
}

.exercise-navigation {
    padding: 24px 0px;
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid #E6E6E6;
}

.exercise-content {
    height: auto;
    padding: 16px;
    margin-top: 16px;
    position: relative;
}
.exercise-content__question p{
    font-size: 1.25rem;
    font-weight: bold;
}

.exercise-content__question {
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.exercise-content__answers {
    width: 358px;
    height: auto;
    list-style: none;
    padding: 0;
    margin: 0 0 45px 0;
}

.exercise-content__answer {
    width: 100%;
    border-radius: 100px;
    padding: 4px 10px 4px 10px;
    margin-bottom: 16px;
    background: white;
    border: 1px solid #D9D9D9;
    color: black;
}

.exercise-content__answer__error {
    color: white;
    background: var(--main-red);
}

.exercise-content__answer__success {
    color: white;
    background: var(--main-greeen);
}

.exercise-content__btn {
    position: absolute;
    left: 16px;
    bottom: 16px;
}
@media screen and (max-width: 992px) {
    html {
        font-size: 13px;
    }

    .sidebar-columns {
        width: 300px;
    }

    .sidebar-column__message {
        margin: 1rem;
    }

    .column-main__header {
        padding: 1.5rem;
    }

    .header-panel-2 {
        display: none;
    }

    .header-icon__bell-active {
        top: 5px;
        right: 2px;
    }
}

@media screen and (max-width: 768px) {
    body{
        font-size: 1.2rem;
    }
    a{
        font-size: 1.2rem;
    }
    .invite-section__price-block {
        width: 100%;
        padding: 2rem 2rem;
        margin-top: 2rem;
    }
    .invite-section-content .nav .nav-item {
        margin-right: 2px;
    }
    .sidebar-menu {
        width: 100%;
        height: 64px;
        flex-direction: row;

        justify-content: space-between;
        align-items: center;
        padding: 0 16px;
    }

    .sidebar-menu:hover {
        width: 100%;
    }
    .invite-section-content {
        padding: 1rem 1rem;
    }

    .sidebar-menu__nav {
        width: 250px;
        height: 100vh;
        margin-top: 0px!important;
        padding: 32px 16px;

        background-color: var(--main-color);

        position: fixed;
        top: 60px;
        right: 0;
        transform: translateX(300px);
        transition: all .3s;
    }

    .sidebar-menu__nav__active {
        transform: translateX(0px);
    }

    .sidebar-menu__item__exit {
        position: initial;
        bottom: 500;
    }


    .sidebar-column {
        display: none;
    }

    .sidebar-menu span {
        display: block;
    }

    .sidebar-menu__item span {
        color: #8D8E90;
    }

    .column-main {
        margin-top: 64px;
    }

    .sidebar-columns {
        width: 0px;
    }

    .header-icon {
        display: none;
    }
    
    .sidebar-icon {
        display: flex;
    }

    .main-header-icon {
        display: block;
        margin-right: 24px;
    }

    .burger-mobile {
        display: block;
    }

    .header-icon__bell-active {
        top: 2px;
        right: -2px;
    }

    .sidebar-menu__item {
        height: 52px;
        position: relative;
        display: flex;
        align-items: center;
    }

    .sidebar-menu__item::after {
        content: url("/img/icon/nav-item-arrow-mobile.svg");
        width: 20px;
        height: 20px;
        position: absolute;
        right: 0;
        top: 15px;
    }

    .sidebar-menu__item-img {
        display: none;
    }

    .title-page-wrapper{
        border-bottom: 1px solid #E6E6E6;
        margin: 0 -16px;
        padding: 0 16px 16px;
    }

    .mobile-full-btn {
        display: block;
    }
    .exercise-content {
        padding: 6px;
        margin-top: 6px;
    }
}