@font-face {
	font-family: 'Montserrat';
	font-weight: normal;
	font-style: normal;
	src: url('../font/Montserrat-Regular.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-style: normal;
	font-weight: bold;
	src: url('../font/Montserrat-Bold.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-weight: normal;
	font-style: italic;
	src: url('../font/Montserrat-Italic.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-weight: bold;
	font-style: italic;
	src: url('../font/Montserrat-BoldItalic.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-weight: 300;
	font-style: normal;
	src: url('../font/Montserrat-Light.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-weight: 600;
	font-style: normal;
	src: url('../font/Montserrat-SemiBold.ttf');
}

@font-face {
	font-family: 'Montserrat';
	font-weight: 500;
	font-style: normal;
	src: url('../font/Montserrat-Medium.ttf');
}

::-webkit-scrollbar {
	width: 10px;
}

::-webkit-scrollbar-track {
	background: #eee;
}

::-webkit-scrollbar-thumb {
	background: #2168eb;
}

::-webkit-scrollbar-thumb:hover {
	background: #043486;
}
html {
    overflow: hidden; /* Hide scrollbars */
  }
html, body {
	height: 100%;
	font-family: "Montserrat", sans-serif;
}
.description {

	word-wrap: break-word;
	word-break: break-all; /* более приоритетно */
  }
a {
	color: inherit;
	text-decoration: none;
}

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

.bold--style {
	font-weight: 600;
}

.medium--style {
	font-weight: 500;
}

.italic--style {
	font-style: italic;
}

.align--centre {
	text-align: center;
}

.img_wrapper {
	max-width: 600px;
	margin: 0 auto 20px;
}

.img_wrapper img {
	/* display: block; */
	text-align: center;
	width: 50%;
}

.figcaption {
	float: right;
	margin: 20px auto 20px;
}

.table {
	max-width: 900px;
	margin: 0 auto 20px;
}

.table td {
	border: 1px solid#073a5c;
}

/* ---------------------------------- Home page style start ---------------------------------- */

.header {
	padding: 20px;
	margin-bottom: 140px;
	text-align: center;
}

.logo {
	display: inline-block;
}

.logo_img {
	display: block;
	width: 200px;
	height: auto;
}

.title-container {
	width: 100vw;
	height: 100vh;
}

.title-col1 {
	height: 100%;
	background: url("../img/back.jpg") 50% 50% no-repeat;
	background-size: cover;
	border-right: 5px solid white;
}

.title-col2 {
	height: 100%;
	background-color: #073a5c;
	background-size: 100% 100%;
}

.title_container {
	margin-bottom: 100px;
	text-align: center;
	color: #fff;
}

.title {
	margin-bottom: 20px;
	font-size: 6vh;
	font-weight: 600;
	text-transform: uppercase;
}

.subtitle {
	font-size: 2vh;
}

.menu {
	text-align: center;
}

.menu_link {
	display: inline-block;
	padding: 10px 26px;
	margin-right: 10px;
	background-color: #052a42;
	font-size: 3vh;
	font-weight: 600;
	color: #edeef7;
	border-radius: 2px;
	box-shadow: 0 4px 20px 0 #0003;
	transition: 0.3s;
}

.menu_link:last-child {
	margin-right: 0;
}

.menu_link:hover {
	color: #d5d81d;
	text-decoration: none;
}

/* ---------------------------------- Home page modal blocks style start ---------------------------------- */

.modal_title {
	margin-bottom: 20px;
	text-align: center;
	font-size: 4vh;
	color: #073a5c;
}

.authors_text {
	text-align: center;
	font-weight: 600;
}

.literature_list {
	list-style: none;
	counter-reset: li;
}

.literature_item {
	margin-bottom: 10px;
	counter-increment: li;
}

.literature_item::before {
	content: counter(li);
	font-weight: 600;
	color: #073a5c;
	display: inline-block;
	width: 20px;
	margin-left: -20px;
}

.content_list {
	list-style: none;
}

.content_item {
	margin-bottom: 10px;
}

.content_item:nth-child(odd) {
	background-color: #113a5559;
}

.content_link {
	display: inline-block;
	padding: 7px 10px;
	font-weight: 500;
	transition: 0.3s;
}

.content_link:hover {
	color: #5c0707;
	text-decoration: none;
}

.labwork::before {
	content: "";
	display: inline-block;
	width: 24px;
	height: 24px;
	background: url("../img/chemistry.svg") 0 0 no-repeat;
	background-size: 24px;
	margin-right: 10px;
	vertical-align: middle;
}

/* ---------------------------------- Home page modal blocks style end ---------------------------------- */

.footer {
	text-align: right;
}

.footer_text {
	padding: 20px;
	color: #fff;
}

/* ---------------------------------- Home page style end ---------------------------------- */

/* ---------------------------------- Content style start ---------------------------------- */

.navbar-brand .logo_img {
	width: 150px;
	height: auto;
}

.inner_nav_link {
	font-size: 2vh;
	font-weight: 600;
	color: #edeef7;
	border-bottom: 2px solid transparent;
	transition: 0.3s;
}

.inner_nav_link:hover {
	color: #edeef7;
	border-bottom: 2px solid #fff;
}

.chapter_container {
	position: absolute;
	top: 100px;
	left: 0;
	width: 100%;
	padding: 0 30px;
}

.lection-scroll-panel {
	width: 100%;
	height: 77vh;
	overflow-y: scroll;
	padding-right: 1rem;
}

.chapter_content {
	padding: 20px;
	background-color: white;
}

.chapter_title {
	padding-bottom: 14px;
	margin-bottom: 20px;
	font-size: 4vh;
	color: #073a5c;
	border-bottom: 1px solid rgba(123, 152, 235, 0.3);
}

.chapter_text {
	text-indent: 1.5em;
	text-align: justify;
	color: #000;
}

.chapter_content_list {
	margin-left: 40px;
}

.btn_wrapper {
	margin-top: 20px;
	text-align: right;
}

.next_btn, .prev_btn {
	display: inline-block;
	width: 70px;
	height: 40px;
	border: 2px solid transparent;
	transition: 0.3s;
}

.next_btn {
	background: #7b98eb url("../img/arrow-right.svg") 50% 50% no-repeat;
	background-size: 23px;
}

.prev_btn {
	margin-right: 10px;
	background: #7b98eb url("../img/arrow-left.svg") 50% 50% no-repeat;
	background-size: 23px;
}

.next_btn:hover, .prev_btn:hover {
	border-color: #fff;
}

/* ---------------------------------- Content style start ---------------------------------- */

.test-variant {
	margin-bottom: 1rem;
}

.test-variant button {
	width: 3rem;
	height: 3rem;
	margin-right: 1rem;
}


/* Модальный (фон) */
.modal {
	display: none; /* Скрыто по умолчанию */
	position: fixed; /* Оставаться на месте */
	z-index: 1; /* Сидеть на вершине */
	padding-top: 8vh;/* Расположение коробки */
	padding-bottom:  0; /* Расположение коробки */
	left: 0;
	top: 0;
	width: 100%; /* Полная ширина */
	height: 100%; /* Полная высота */
	overflow: auto; /* Включите прокрутку, если это необходимо */
	background-color: rgb(0,0,0); /* Цвет запасной вариант  */
	background-color: rgba(0,0,0,0.4); /*Черный с непрозрачностью */
	backdrop-filter: blur(12px);
  }
  
  /* Модальное содержание */
  .modal-content {
	position: relative;
	background-color: #fefefe;
	margin: auto;
	padding: 0;
	border: 1px solid #888;
	width: 90%;
	box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
	-webkit-animation-name: animatetop;
	-webkit-animation-duration: 0.4s;
	
	animation-name: animatetop;
	animation-duration: 0.4s
  }
  
  /* Добавить анимацию */
  @-webkit-keyframes animatetop {
	from {top:-300px; opacity:0} 
	to {top:0; opacity:1}
  }
  
  @keyframes animatetop {
	from {top:-300px; opacity:0}
	to {top:0; opacity:1}
  }
  
  /* Кнопка закрытия */
  .close {
	color: rgb(167, 7, 7);
	float: right;
	font-size: 28px;
	font-weight: bold;
  }
  
  .close:hover,
  .close:focus,
  .nav_myBtn:hover {
	color: #000;
	text-decoration: none;
	cursor: pointer;
  }
  
  .modal-header {
	padding: 2px 16px;
	
  }
  
  .modal-body {
	padding: 2px 16px;
	overflow: auto; /* Включите прокрутку, если это необходимо */}

  .nav_myBtn {
	color: rgb(114, 7, 7);
	float: right;
	font-size: 16px;
	font-weight: bold;
	padding: 2px 16px;
	margin: 5px;
  }