.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}.header-course{padding:75px 0}.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:.5s;padding-top:0}.sidebar a{padding:8px 8px 8px 15px;text-decoration:none;color:#818181;display:block;transition:.3s}.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:700;font-size:16px;text-transform:uppercase}.open_lessons{font-weight:700;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:700;font-size:16px}.lesson_cores .img_fullwidth{margin-bottom:30px}.liner{display:block;height:1px;background-color:#ccc;margin-left:15px;margin-right:15px}.overview-sidebar__header{min-height:7rem;position:relative;overflow:hidden;padding:1.5rem 0 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,.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:700}.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:.3px;text-decoration:none;text-transform:uppercase;padding:0 30px;transition:opacity .3s;color:#000;border-radius:2rem}a.chi_tiet{color:#fff;font-size:13px;text-transform:uppercase;font-weight:700;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:0;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}@media screen and (max-height:450px){.sidebar{padding-top:15px}.sidebar a{font-size:15px}}