.lesson_cores {
	position: relative;
	margin-bottom: 15px;
}

.lesson_cores_detail {
    position: fixed;
    margin-bottom: 15px;
    width: 15rem;
    float: left;
    min-height: 800px;
    left: 0;
    top: 75px;
}
div#content.lesson-open {
    padding-left: 15rem;
}

.lesson_content {

}
.header-course {
    padding: 75px 0px;
}
.header_courses {
    position: relative;
}
.sidebar {
  height: 100%;
  width: 100%;
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  background-color: #FAFAFA;
  overflow-x: hidden;
  transition: 0.5s;
  padding-top: 0px;
}

.sidebar a {
  padding: 8px 8px 8px 15px;
  text-decoration: none;
  color: #818181;
  display: block;
  transition: 0.3s;
}

.sidebar a:hover {
}

.sidebar .closebtn {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 30px;
  margin-left: 50px;
}

.openbtn {
  font-size: 20px;
  cursor: pointer;
  color: #111;
  padding: 10px 15px;
  border: none;
  border-color: unset !important;
}

.openbtn:hover {
  background-color: #f8f8f8;
}
div#mySidebar.show{
	display: block;
}
div#mySidebar.hide{
	display: none;
}

#main_lesson {
  transition: margin-left .5s;
  padding: 16px;
  width: 100%;
  position: relative;
  min-height: 500px;
}

.ds_bai_hoc.hide {
	display: none;
}

.ds_bai_hoc.show {
	display: block;
}

#khoa_hoc {
    font-weight: bold;
    font-size: 16px;
	text-transform: uppercase;
}

.open_lessons {
    font-weight: bold;
    font-size: 14px !important;
    text-transform: uppercase;
}
#ds_bai_hoc a, #ds_bai_hoc a .fa-angle-right {
    font-size: 11px;
    font-weight: 600;
}
#ds_bai_hoc a .fa-angle-right {
	margin-right: 7px;
}
#ds_bai_hoc a.current-lesson {
    border-left: solid 5px red;
    background: #e0dfdf;
    color: #000;
}
#loading {
    width: 80px;
	position: absolute;
    left: 45%;
    top: 25%;
	display: none;
}

.open_lessons .fa-angle-right, .open_lessons .fa-angle-down {
    font-weight: bold;
    font-size: 16px;
}

.lesson_cores .img_fullwidth {
	margin-bottom: 30px;
}


.liner {
    display: block;
    height: 1px;
    background-color: #ccc;
    margin-left: 15px;
    margin-right: 15px;
}


/* add more */
.overview-sidebar__header {
    min-height: 7rem;
    position: relative;
    overflow: hidden;
    padding: 1.5rem 0rem 0;
    color: #fff;
    z-index: 1;
    transition-duration: .6s;
    transition-property: background,padding;
}

.overview-sidebar__header--background {
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    bottom: 0;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
}

.overview__side-panel, .overview__side-panel-overlay {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.3);
}

.overview-sidebar__info {
    opacity: 1;
    outline: none;
    position: relative;
    transform: translateZ(0);
    transition: opacity .3s linear .3s,visibility 0s;
    visibility: visible;
}

.overview-sidebar__title {
    display: block !important;
    margin: 0;
    line-height: 1.5;
    font-weight: 900;
    font-size: 1.25rem !important;
    color: #fff !important;
    text-decoration: none !important;
}

.header_courses .header_image {
    background: #fff;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: 50% 50%;
	height: 300px;
    width: 1200px;
}

.header_courses .header_courses {
	position: relative;
}


.header_courses .header_title {
    font-size: 28px;
    text-align: left;
    color: #fff;
    font-weight: bold;
}
.header_courses .bat_dau_khoa_hoc {
    background: #fff;
    margin-right: 3rem;
    display: inline-block;
    font-size: 13px;
    font-weight: 800;
    line-height: 35px;
    letter-spacing: 0.3px;
    text-decoration: none;
    text-transform: uppercase;
    padding: 0px 30px;
    transition: opacity .3s;
    color: #000;
    border-radius: 2rem;
}
a.chi_tiet {
    color: #fff;
    font-size: 13px;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: .5px;
}
.term_desc {
    margin-top: 70px;
    line-height: 1.75;
    font-style: italic;
}
.danh_sach .ds_bai_hoc a {
    font-size: 13px !important;
    font-weight: 600;
    padding-top: 6px;
}

.term_desc ol li {
    margin-bottom: 0px;
    margin-top: 15px;
}
.danh_sach {
    line-height: 2.5;
    padding-top: 50px;
    padding-bottom: 100px;
}
.overview-list-item__icon {
    float: left;
    padding-right: 10px;
    padding-top: 2px;
}
.danh_sach .open_lessons {
    font-size: 11px !important;
    letter-spacing: .65px;
}
.overview-list-item__icon svg:not(:root){
    fill: #716f6f !important;
}
.danh_sach a {
	color: #313537;
	display: block;
}

.danh_sach .liner {
    margin-left: 0;
	margin-bottom: 15px;
}

.lesson_content {
	min-height: 800px;
}
.course_process {
    font-size: 13px;
    font-style: italic;
    padding-bottom: 10px;
}
/* add more */


/* On smaller screens, where height is less than 450px, change the style of the sidenav (less padding and a smaller font size) */
@media screen and (max-height: 450px) {
  .sidebar {padding-top: 15px;}
  .sidebar a {font-size: 15px;}
}