:root {
    --colorGreen: #36dfac;

    --colorBlack: #111;
    --colorGrey: #333;

    --colorWight: #ddd;

    --colorVK: #4a76a8;
    --colorYandex: #FC6E54;

    --page-header-bgColor: #242e42;
    --page-header-bgColor-hover: #1d2636;
    --page-header-txtColor: #dde9f8;
    --page-header-headingColor: #7889a4;
    --page-header-width: 220px;
    --page-content-bgColor: #111;
    --page-content-txtColor: #eee;
    --page-content-blockColor: #242e42;
    --white: #fff;
    --black: #333;
    --blue: #00b9eb;
    --darkBlue: #242e42;
    --red: #ec1848;
    --green: green;
    --gray: #999;
    --yellow: orange;
    --border-radius: 4px;
    --box-shadow: 0 0 10px -2px rgba(0, 0, 0, 0.075);
    --switch-bgLightModeColor: #87cefa;
    --switch-sunColor: gold;
    --switch-moonColor: #f4f4f4;
    --switch-bgDarkModeColor: #1f1f27;

    --homeTopBlue: #3498db;
    --homeTopGreen: #2ecc71;
    --homeTopPurple: #9b59b6;
    --homeTopGold: #f1c40f;
    --homeTopRed: #e74c3c;
    --homeTopOrange: #e67e22;
}

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

ul {
    list-style: none;
}

a,
button {
    color: inherit;
}

a {
    text-decoration: none;
}

button {
    background: none;
    cursor: pointer;
}

input {
    -webkit-appearance: none;
}

[type="checkbox"] {
    position: absolute;
    left: -9999px;
}

label {
    cursor: pointer;
}

button,
input {
    border: none;
}

svg {
    display: block;
}

body {
    font: 16px/1.5 "Lato", sans-serif;
    background-color: var(--page-content-bgColor);
}

svg path.bio{
    fill:var(--green);
}

svg path.chem{
    fill:var(--homeTopBlue);
}


/* HEADER STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: auto;
    padding-top: 20px;
    width: var(--page-header-width);
    color: var(--page-header-txtColor);
    background: var(--page-header-bgColor);
}

/* PAGE CONTENT STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-content {
    position: relative;
    left: var(--page-header-width);
/*  width: calc(100% - var(--page-header-width));*/
    width: calc(100% - (var(--page-header-width)*2));
    min-height: 100vh;
    padding: 30px;
    color: var(--page-content-txtColor);
    background: var(--page-content-bgColor);
}

.page-content h1{
    font-size: 60px;
}

.page-content button,.page-content a.button{
    font-size: 25px;
    padding: 10px 14px;
    border: 0;
    border-radius: 15px;
    cursor: pointer;
    margin: 25px 0;
    text-transform: capitalize;
}

.search-and-user {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-column-gap: 50px;
    align-items: center;
    background: var(--page-content-bgColor);
    margin-bottom: 30px;
}

.search-and-user form {
    position: relative;
}

.search-and-user [type="search"] {
    width: 100%;
    height: 50px;
    font-size: 1.5rem;
    padding-left: 15px;
    background: var(--page-content-blockColor);
    color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.search-and-user ::placeholder {
    color: var(--page-content-txtColor);
}

.search-and-user form svg {
    width: 26px;
    height: 26px;
    fill: var(--page-content-txtColor);
}

.search-and-user form button {
    position: absolute;
    top: 50%;
    right: 15px;
    transform: translateY(-50%);
}

.search-and-user .admin-profile {
    display: flex;
    align-items: center;
}

.search-and-user .admin-profile .greeting {
    margin: 0 10px 0 20px;
}

.search-and-user .admin-profile svg {
    width: 30px;
    height: 30px;
    fill: var(--white);
}

.light-mode .search-and-user .admin-profile svg{
    fill: var(--black);
}

.search-and-user .admin-profile .notifications {
    position: relative;
}

.search-and-user .admin-profile .badge {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -10px;
    right: -3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 10px;
    color: var(--white);
    background: var(--red);
}

.page-content .grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 30px;
}

.page-content .grid > article {
    display: flex;
    min-height: 300px;
    background: var(--page-content-blockColor);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.page-content .grid > article.two {
    grid-column: 1 / -1;
}

.subscribes{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-gap: 30px;
    overflow: hidden;
}
.subscribes > div{
    width: 100%;
    text-align: center;
}
.subscribes > div.two {
    grid-column: 1 / -1;
    width: 100%;
}

.subscribes button{
    background-color: var(--green);
    border: 1px solid var(--colorGreen);
    padding: 15px;
    color: var(--colorWight);
    font-size: 16px;
    margin: 15px;
}

.subscribes button[disabled="disabled"]{
    background-color: var(--gray);
    border: 1px solid var(--gray);
    cursor: default;
    position: relative;
}
.subscribes button[disabled="disabled"] > *{
    opacity: .4;
}
.subscribes button[disabled="disabled"]:after{
    content: 'Скоро!';
    color: var(--green);
    text-shadow: 0px 0px 3px var(--colorWight);
    display: inline-block;
    font-size: 35px;
    position: absolute;
    top: 50px;
    left: 39px;
    transform: rotate(45deg);
}

.subscribes div.two button{
    display: inline-block;
    margin: 35px;
}

.subscribes div.two h2{
    display: none;
}

.subscribes button b{
    font-size: 22px;
    white-space: nowrap;
    display: block;
    width: 100%;
    border-bottom: 1px solid var(--colorWight);
    padding-bottom: 5px;
    margin-bottom: 5px;
}

.subscribes button i{
    font-size: 12px;
    white-space: nowrap;
    display: block;
    width: 100%;
    margin-bottom: 20px;
}

.subscribes button span{
    font-size: 22px;
}

.subscribes form h2{
    text-align: center;
    width: 100%;
}

@media screen and (max-width: 1550px) {
    .page-content h1{
        font-size: 55px;
    }
}

@media screen and (max-width: 1110px) {
    .page-content {
        width: calc(100% - var(--page-header-width));
    }
    .page-content h1{
        font-size: 40px;
        margin-top: 22px;
    }
    .collapsed .page-content {
        left: 40px;
        width: calc(100% - 40px);
    }
}

@media screen and (max-width: 850px) {
    .subscribes > div, .mySubscribes > div{
        grid-column: 1 / -1;
        width: 100%;
    }
}

@media screen and (max-width: 820px) {
    .page-content h1{
        font-size: 32px;
    }
}

/* MQ RULES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@media screen and (max-width: 767px) {
    .collapsed .page-content{
        width: 100%;
    }

    .page-content h1{
        display: none;
    }

    .page-content {
        position: static;
        width: 100%;
    }

    .page-content {
        min-height: 0;
        padding: 10px;
    }

    .page-content .grid {
        grid-gap: 10px;
    }

    .page-content .grid > article {
        grid-column: 1 / -1;
    }

    .search-and-user {
        position: absolute;
        left: 131px;
        top: 10px;
        padding: 0;
        grid-column-gap: 5px;
        width: calc(100% - 141px);
        border-radius: var(--border-radius);
        background: transparent;
    }

    .search-and-user [type="search"] {
        font-size: 1rem;
        height: 35px;
    }

    .search-and-user form svg {
        width: 18px;
        height: 18px;
    }

    .search-and-user .admin-profile svg {
        fill: var(--white);
    }
}

@media screen and (max-width: 400px) {
    .page-content .grid > article {
        grid-column: 1 / -1;
    }
}


/* BODY CLASSES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.mob-menu-opened .toggle-mob-menu svg {
    transform: rotate(180deg);
}

.mob-menu-opened .page-header .tutor-menu {
    transform: scale(1);
    visibility: visible;
    opacity: 1;
}

/*
@media screen and (min-width: 768px) {
    .collapsed .page-content {
        left: 40px;
        width: calc(100% - 40px);
    }
}


/* SWITCH STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.switch label {
    display: grid;
    grid-template-columns: auto auto;
    grid-column-gap: 10px;
    align-items: center;
    justify-content: flex-start;
}

.switch span:first-child {
    position: relative;
    width: 50px;
    height: 26px;
    border-radius: 15px;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.4);
    background: var(--switch-bgLightModeColor);
    transition: all 0.3s;
}

.switch span:first-child::before,
.switch span:first-child::after {
    content: "";
    position: absolute;
    border-radius: 50%;
}

.switch span:first-child::before {
    top: 1px;
    left: 1px;
    width: 24px;
    height: 24px;
    background: var(--white);
    z-index: 1;
    transition: transform 0.3s;
}

.switch span:first-child::after {
    top: 50%;
    right: 8px;
    width: 10px;
    height: 10px;
    transform: translateY(-50%);
    background: var(--switch-sunColor);
    box-shadow: 0 0 4px 2px var(--switch-sunColor);
}

.switch [type="checkbox"]:checked + label span:first-child {
    background: var(--switch-bgDarkModeColor);
}

.switch [type="checkbox"]:focus + label span:first-child {
    box-shadow: 0 3px 5px rgba(255, 255, 255, 0.25);
}

.switch [type="checkbox"]:checked + label span:first-child::before {
    transform: translateX(24px);
}

.switch [type="checkbox"]:checked + label span:first-child::after {
    left: 12px;
    width: 15px;
    height: 15px;
    background: transparent;
    box-shadow: -2px -5px 0 var(--switch-moonColor);
    transform: translateY(-50%) rotate(-72deg);
}


/* LIGHT MODE STYLES
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.light-mode {
    --page-header-bgColor: #f1efec;
    --page-header-bgColor-hover: #b9e4e0;
    --page-header-txtColor: #2c303a;
    --page-header-headingColor: #979595;
    --page-content-bgColor: #ffffff;
    --page-content-txtColor: #171616;
    --page-content-blockColor: #eee;
    --box-shadow: 0 0 10px -2px rgba(0, 0, 0, 0.25);
}

.light-mode .page-header .tutor-menu a:hover,
.light-mode .page-header .tutor-menu a:focus,
.light-mode .page-header .tutor-menu button:hover,
.light-mode .page-header .tutor-menu button:focus {
    color: var(--black);
}

.light-mode .page-header .logo svg,
.light-mode .page-header .tutor-menu a:hover svg,
.light-mode .page-header .tutor-menu a:focus svg,
.light-mode .page-header .tutor-menu button:hover svg,
.light-mode .page-header .tutor-menu button:focus svg {
    fill: var(--black);
}

.light-mode .switch [type="checkbox"]:focus + label span:first-child {
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.25);
}

@media screen and (max-width: 767px) {
    .light-mode .search-and-user .admin-profile svg {
        fill: var(--black);
    }
}


/* FOOTER
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.page-footer {
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-top: 10px;
}

.page-footer ul li{
    display: inline-block;
    margin: 0 15px;
}

.page-footer ul li label{
    font-size: 14px;
}

.page-footer a {
    margin-left: 4px;
}

/* OVERLAY
–––––––––––––––––––––––––––––––––––––––––––––––––– */
#overlay:not(.show), .overlayCheck{
    display: none;
}

#overlay-agreement:checked ~ #overlay, #overlay-agreement:checked ~ #overlay .overlayBlock.overlay-agreement{
    display: block;
}
#overlay-cookies:checked ~ #overlay, #overlay-cookies:checked ~ #overlay .overlayBlock.overlay-cookies{
    display: block;
}
#overlay-enter:checked ~ #overlay, #overlay-enter:checked ~ #overlay .overlayBlock.overlay-enter{
    display: block;
}
#overlay-subscribes:checked ~ #overlay, #overlay-subscribes:checked ~ #overlay .overlayBlock.overlay-subscribes{
    display: block;
}
#overlay-lockChange:checked ~ #overlay, #overlay-lockChange:checked ~ #overlay .overlayBlock.overlay-lockChange{
    display: block;
}

#overlay{
    z-index: 999;
}

#overlay .overlayBack{
    position: fixed;
    top:0;
    left:0;
    width: 100vw;
    height: 100vh;
    background: var(--page-content-txtColor);
    opacity: .4;
    z-index: 99;
}

#overlay .overlayBlock{
    display: none;
    position: fixed;
    top:0;
    left:0;
    width: 50vw;
    min-height: 350px;
    max-height: calc(100vh - 300px);

    margin: 150px 25vw;
    padding: 50px;

    background: var(--page-content-blockColor);
    color: var(--page-content-txtColor);

    box-shadow: var(--box-shadow);
    z-index: 999;

    overflow-y: scroll;
}

#overlay .overlayBlock .close{
    position: absolute;
    right: 25px;
    top:25px;
}
#overlay .overlayBlock .close svg{
    fill: var(--red);
    display: inline;
    margin-bottom: -17px;
}

#overlay .overlayBlock ul{
    list-style: decimal;
}

#overlay .overlayBlock ul li{
    padding: 10px;
}

.overlayBlock button,.overlayBlock a.button{
    font-size: 25px;
    padding: 10px 14px;
    border: 0;
    border-radius: 15px;
    cursor: pointer;
    margin: 0 5px;
    display: inline-block;
}

a.enterVK{
    background-color: var(--colorVK);
    color: var(--white);
}

a.enterYandex{
    background-color: var(--colorYandex);
    color: var(--white);
    margin-left: 35px;
}

#notificationInformer{
    position: absolute;
    top: 50px;
    right: 25px;
    width: 48px;
    height: 48px;
    text-align: center;
    z-index: 9;
}

.notificationsMenu{
    position: relative;
}

#notificationInformer svg{
    width: 32px;
    height: 32px;
    display: inline;
    margin-top: 16px;
    fill:var(--page-header-txtColor);
}

#notificationInformer .new{
    position: absolute;
    top: 10px;
    right: 3px;
    width: 20px;
    height: 20px;
    display: inline;
    text-align: center;
    vertical-align: middle;
    background-color: var(--homeTopRed);
    border-radius: 10px;
}

.notificationsMenu .new{
    position: absolute;
    top: 4px;
    right: 3px;
    width: 20px;
    height: 20px;
    display: inline;
    text-align: center;
    vertical-align: middle;
    background-color: var(--homeTopRed);
    border-radius: 10px;
}

#notificationInformer .new.hide, .notificationsMenu .new.hide{
    display: none;
}

#notificationInformer .new span, .notificationsMenu .new span{
    margin: -1px 0;
    width: 100%;
    display: block;
    text-align: center;
    font-size: 14px;
    font-weight: bold;
    color: var(--white);
}

@media screen and (max-width: 767px) {
    .overlayBlock button,.overlayBlock a.button{
        white-space: nowrap;
        margin-bottom: 15px;
    }

    #overlay .overlayBlock{
        width: 98vw;
        height: 98vh;
        margin: 1vh 1vw;
        min-height: 98vh;
        max-height: 98vh;
    }

    #overlay .overlayBlock h1{
        margin-top: 25px;
        line-break: auto;
    }

    #notificationInformer{
        top: 15px;
        right: 20px;
    }
}



@media speech{

}

@media print{

}
/*In case you prefer an absolutely positioned header that covers the full page height, add these styles*/
/*body {
  position: relative;
}

.page-header {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
}*/

/*remove these styles*/
/*.page-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
}*/


.page-header,.page-header *{
    -webkit-transition: width 0.4s, height 0.4s, opacity 0.4s, margin-right 0.4s, margin-left 0.4s, -webkit-transform 0.4s;
    -moz-transition: width 0.4s, height 0.4s, opacity 0.4s, margin-right 0.4s, margin-left 0.4s;
    -o-transition: width 0.4s, height 0.4s, opacity 0.4s, margin-right 0.4s, margin-left 0.4s;
}

.page-header,.page-header nav, .page-header .tutor-menu{
    overflow-x: hidden;
}

.page-header nav {
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.page-header .logo {
    width: 160px;
    height: 60px;
    margin: 15px auto 0;
}

.page-header .logo strong{
    font-size: 22px;
    margin-left: -16px;
}

.page-header .logo svg {
    fill: var(--white);
    max-width: 160px;
    font-size: 42px;
    font-weight: bold;
}

.logo svg .online{
    font-size: 24px;
}

.logo svg .blue{
    fill:var(--homeTopBlue);
}
.logo svg .green{
    fill:var(--homeTopGreen);
}
.logo svg .purple{
    fill:var(--homeTopPurple);
}
.logo svg .gold{
    fill:var(--homeTopGold);
}
.logo svg .red{
    fill:var(--homeTopRed);
}

.page-header .toggle-mob-menu {
    display: none;
    margin-left: 5px;
    padding: 4px;
    background: var(--page-content-blockColor);
    border-radius: var(--border-radius);
}

.page-header .toggle-mob-menu svg {
    fill: var(--black);
    transition: transform 0.2s;
}

.page-header .tutor-menu {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    margin-top: 0px;
    overflow-y: auto;
    height: 50vh;
}

.page-header .tutor-menu li:nth-last-child(2) {
    margin-bottom: 35px;
}

.page-header .tutor-menu li:last-child {
    margin-top: auto;
    margin-bottom: 80px;
}

.page-header .tutor-menu li > * {
    width: 100%;
    padding: 12px 15px;
}

.page-header .tutor-menu .switcher {
    display: inline-block;
    width: auto;
}

.page-header .tutor-menu .menu-heading h3 {
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 12px;
    margin-top: 12px;
    color: var(--page-header-headingColor);
}

.page-header .tutor-menu svg {
    max-width: 20px;
    max-height: 20px;
    min-width: 0px;
    min-height: 0px;
    fill: var(--page-header-txtColor);
    margin-right: 10px;
}

.page-header .tutor-menu img{
    max-width: 60px;
    max-height: 60px;
    min-width: 0px;
    min-height: 0px;
    margin-right: 10px;
    border-radius: 50%;
}

.page-header .tutor-menu a,
.page-header .tutor-menu label,
.page-header .tutor-menu button {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
}

.page-header .tutor-menu .twoLinks{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.page-header .tutor-menu .twoLinks a{
    text-align: center;
    display: block;
}

.page-header .tutor-menu a:hover,
.page-header .tutor-menu a:focus,
.page-header .tutor-menu button:hover,
.page-header .tutor-menu button:focus {
    background: var(--page-header-bgColor-hover);
    color: var(--blue);
    outline: none;
}

.page-header .tutor-menu > li > label:hover{
    background: var(--page-header-bgColor-hover);
    color: var(--blue);
    outline: none;
}

.light-mode .page-header .tutor-menu > li > label:hover{
    color: var(--black);
}

.page-header .tutor-menu a:hover svg,
.page-header .tutor-menu a:focus svg,
.page-header .tutor-menu button:hover svg,
.page-header .tutor-menu button:focus svg {
    fill: var(--blue);
}

.page-header .tutor-menu > li > label:hover svg{
    fill: var(--blue);
}

.light-mode .page-header .tutor-menu > li > label:hover svg{
    fill: var(--black);
}

.collapse-btn{
    display: none !important;
}

@media screen and (min-width: 768px) {
    .collapsed .page-header {
        width: 40px;
    }

    .collapsed .page-header .logo{
        opacity: 0;
        width: 0;
    }

    .collapsed .page-header .tutor-menu{
        overflow: hidden;
        margin-top: 57px;
    }

    .collapsed .page-header .tutor-menu li > a, .collapsed .page-header .tutor-menu li > label{
        padding: 0 10px;
    }

    .collapsed .page-header .tutor-menu li > a > svg, .collapsed .page-header .tutor-menu li > label > svg, .collapsed .page-header .tutor-menu li > a > img{
        margin: 10px 0;
    }

    .collapsed .page-header .tutor-menu img{
        width: 20px;
        height: 20px;
    }

    .collapsed .page-header .tutor-menu li > * {
        padding: 10px;
    }

    .tutor-menu .new span{
        display: block !important;
    }

    .collapsed .page-header .tutor-menu span,
    .collapsed .page-header .tutor-menu .menu-heading {
        display: none;
    }

    .collapsed .page-header .tutor-menu svg {
        margin-right: 0;
    }

    .collapsed .page-header .collapse-btn svg {
        transform: rotate(180deg);
    }
}
/* MQ RULES - MOBILE
–––––––––––––––––––––––––––––––––––––––––––––––––– */
@media screen and (max-width: 767px) {
    .page-header{
        position: static;
        width: 100%;
        padding: 10px;
        height: 0px;
        margin-top: -20px;
    }

    .page-header .tutor-menu{
        z-index: 999 !important;
        height: 105vh !important;
    }

    .page-header .tutor-menu svg{
        width: 40px;
        height: 40px;
        margin-right: 20px;
    }

    .page-header .tutor-menu a span, .page-header .tutor-menu label span{
        font-size: 25px;
    }

    .page-header nav {
        flex-direction: row;
    }

    .page-header .logo {
        margin: 0;
        height: 34px;
        width: 30px;
    }

    .page-header .logo img{
        height: 30px;
    }

    .page-header .logo svg {
        margin-top: -20px;
        height: 54px;
        width: 142px;
    }

    .page-header .toggle-mob-menu {
        display: block;
        position: fixed;
        bottom: 25px;
/*      left: calc(50% - 37.5px);*/
        right: 25px;
        background-color: var(--colorWight);
        z-index: 9999;
        padding: 15px;
        border-right: 35px;
    }

    .light-mode .page-header .toggle-mob-menu{
        background-color: var(--darkBlue);
    }

    .page-header .toggle-mob-menu svg{
        fill: var(--page-content-blockColor);
    }

    .page-header .tutor-menu {
        position: fixed;
        left: 0;
        top: 0;
        margin-top: 0;
        z-index: 2;
        border-radius: var(--border-radius);
        background: var(--page-header-bgColor);
        visibility: hidden;
        opacity: 0;
        transform: scale(0.95);
        transition: all 0.2s;
        width: 100vw;
        height: 100vh;
    }

    .page-header .tutor-menu li:nth-last-child(2) {
        margin-bottom: 12px;
    }

    .page-header .tutor-menu li:last-child button,
    .search-and-user .admin-profile .greeting {
        display: none;
    }
}