*{
    font-family: 'Poppins', sans-serif !important;
}
body {
	background-color: #FCFCFC;
    overflow-x: hidden !important;
	
    line-height: 2;
	}
.container-fluid{
    padding-right:0;
    padding-left: 0;
}
body::-webkit-scrollbar {
    width: 0;
  }
  
.nav{
    background-color: #E34141 !important;
    color: #F4F4F4 !important;
    padding: 20px 20px 0 20px;
}

.nav-tabs {
    border-bottom: 2px solid #DC7979;
}

.nav>.nav-item>.active{
    background-color: #DC7979 !important;
    border: none;
    color: #F4F4F4;
    font-weight:500;
}


.navbtn{
    color: #F4F4F4;
    font-weight:500;
 width: 70px;
}

.tab-content{
    background-color: #FCFCFC !important;
}

.icon{
    background-color: #FCFCFC;
    color: #E34141;
    padding: 3px;
    border-radius: 8px;
}

/* Objective tab css */
.obj{
    color: #B7B7B7;
    font-weight: 600;
}
.heading{
    color: #252525;
    font-weight: 600;
}


/* Theory Tab css */
#equation{
    margin-left: 30%;
}


/* Procedure Tab Css */
.outline{
 padding: 2px;
 border: 1px solid #B7B7B7 ;
}
.scroll{
    -ms-overflow-style: none;
        overflow-x:auto
}
.scroll::-webkit-scrollbar {
    width: 5px;
  }
  
  /* Track */
  .scroll::-webkit-scrollbar-track {
    background: #f1f1f1; 
  }
   
  /* Handle */
  .scroll::-webkit-scrollbar-thumb {
    background: #cecece; 
  }
  
  /* Handle on hover */
  .scroll::-webkit-scrollbar-thumb:hover {
    background: #cecece; 
  }

  
ol.toptext {
    list-style-type: upper-roman;
  }
#observation {
    
    border-collapse: collapse;
    width: 100%;
  }
  
  #observation td, #observation th {
    border: 1px solid #252525;
    padding-top: 20px;
    padding-bottom: 20px;
    
  }
  
  #observation tr:nth-child(even){background-color: #FCFCFC;}
  
  #observation tr:hover {background-color: #FCFCFC;}
  
  #observation th {
    
    text-align: center;
    background-color:#D9D9D9;
    color: #252525;
  }

/* Quiz Tab Css */
.bg{
    background-color: #EAEAEA;
    border-radius: 10px;
}
label{
    display: unset;
    margin-left: 5%;
    text-align: left !important;
}
#submit{
    background: linear-gradient(97.95deg, #F35858 -2.23%, #C91212 112.4%);
    border: 1px solid transparent;
border-radius: 10px;
color: #F4F4F4;
font-weight: 600;
padding: 10px 30px;
}
.option {
    
    position: relative;
    padding-left: 35px;
    margin-bottom: 12px;
    cursor: pointer;

    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }
  

  .option input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
  }
  .li ol{
    list-style-type: none;
  }
  .fade:not(.show) {
    opacity: 3;
  }
  .modal{
    display: none;
   background-color:#252525a3;
}
.modal-dialog {
  position: relative;
  width: auto;
  text-align: center;
  top: 8%;}

  .exampleModalLabel{
margin: auto;
color: #fff;
font-weight: 600;
  }
.list-group-item {
background-color: #ffffff00;
border: none;
}
  .checkmark {

    height: 25px;
    width: 25px;
    background-color: #FCFCFC;
    border-radius: 50%;
    border: 0px solid #D42525; 
  }
 .checkmark:checked {
  
   border-radius: 50%;
   background: #D42525;
   border: none;
 }
  .checkmark:hover input ~ .checkmark {
    background-color: #ccc;
    border: none;
  }
  
  .btn-outline-success:focus {
    box-shadow: 0 0 0 0.25rem rgba(255, 255, 255, 0);
}
  .checkmark input:checked ~ .checkmark {
    background-color: #FCFCFC;
  }
  .btn-check:active+.btn-outline-danger:focus, .btn-check:checked+.btn-outline-danger:focus, .btn-outline-danger.active:focus, .btn-outline-danger.dropdown-toggle.show:focus, .btn-outline-danger:active:focus {
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 70, 0);
}
  
  .checkmark:after {
    content: "";
    position: absolute;
    display: none;
  }
  .checkmark:focus{
    border: none;
  }
  

  .option input:checked ~ .checkmark:after {
    display: block;
  }
  

  .option .checkmark:after {
       top: 5px;
      left: 5px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: #D42525;
  }



  /* Video Tab */
video{
  margin: auto;
  display: block;
  width: 100%;
  height: 100%;
}
  sub{
    line-height: 1.5;
  }
  .download{
    background: #E34141;
    color: #FCFCFC;
    width: 100%;
    padding: 5px;
    border-radius: 20px;
    border: none;
}
.download a{
  color: #fff;
  text-decoration: none;
}
.title{
    margin: 15px 0;
}
  .next{
    background-color: #EAEAEA;
    border-radius: 10px;
    padding: 5px;
    width: 95%;
 display: block;
     /*   margin-left: auto;
    margin-right: auto; */
  }
  .sidevideo{
    background-color: #D9D9D9;
    border-radius: 10px;
    
  }
  .thumb{
    width: 100%;
    padding: 10px 0;
  }
  .nh{
    margin-top: 15;
    font-weight: 600;
    color: #515151;
    margin-left: 4%;
    
  }
  .content{
    -ms-overflow-style: none;
        overflow-x:auto
}
.content::-webkit-scrollbar {
    width: 5px;
  }
  
  /* Track */
  .content::-webkit-scrollbar-track {
    background: #f1f1f1; 
  }
   
  /* Handle */
  .content::-webkit-scrollbar-thumb {
    background: #cecece; 
  }
  
  /* Handle on hover */
  .content::-webkit-scrollbar-thumb:hover {
    background: #cecece; 
  }

  
  .ct{
    margin-top: 20;
    line-height: 1.5;
    font-weight: 500;
    color: #252525;
  }
  .dot{
    font-size: xx-large;
  }
  .controls{
    display: flex;
    position: absolute;
    bottom: 0;
    width: 100%;
    flex-wrap: wrap;
    background-color: rgba(0, 0, 0, 0.25);
  }
.button button{
    background: none;
    border: 0;
    outline: 0;
    cursor: pointer;
}
.button button ::before{
    content: '\f144';
    font-family: 'Font Awesome 5 Free';
    width: 30px;
    height: 30px;
    display: inline-block;
    font-size: 28px;
    color: #D9D9D9;
    -webkit-font-smoothing: antialiased;
}
.gallery {
  display: flex;
  flex-flow: wrap;
  border: solid rgb(240,240,240);
}
.gallery div {  /* блоки видео + списков */
  flex: 150px;
  position: relative;
  text-align: center;
}
.gallery div:nth-of-type(1) {
  flex: 10000 1 300px;  /* если ширина менее 300 + 150 = 450px , то списки миниатюр смещаются на нижний ряд, подробнее про свойство flex */
}
.gallery div::before {
  content: "";
  display: block;
  padding-top: 100px;
}
.gallery div:nth-of-type(1)::before {
  padding-top: 56.25%;
}
.gallery iframe,
.gallery span {
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
}
.gallery a {  /* для разнообразия, иконки не затемнены, так проще оценить код галереи видео */
  display: inline-block;
  margin-top: 5px;
}
.gallery a:last-child {
  margin-bottom: 5px;
}
.gallery iframe,
.gallery img {
  max-width: 100%;
  vertical-align: middle;
}


/* Reference page */
.pdf{
    background-color: #EAEAEA;
border-radius: 10px;

width: 90%;
}
.link{
  background-color: #EAEAEA;
  border-radius: 20px;
  border: none;
  color: #252525;
}
.link a{
  color: #252525 !important;
font-size: 15px;
}
.link a iconify-icon{
  color: #252525;
  font-size: 20px;
}

.referscroll{
  -ms-overflow-style: none;
      overflow-x:auto
}
.referscroll::-webkit-scrollbar {
  width: 5px;
}

/* Track */
.referscroll::-webkit-scrollbar-track {
  background: #f1f1f1; 
}
 
/* Handle */
.referscroll::-webkit-scrollbar-thumb {
  background: #cecece; 
}

/* Handle on hover */
.referscroll::-webkit-scrollbar-thumb:hover {
  background: #cecece; 
}
/* .fadeend::after{
content  : "";
  position : absolute;
  z-index  : 20;
  bottom   : -25%;
  
  pointer-events   :none;
  background-image : linear-gradient(to bottom, 
                    rgba(255,255,255, 0), 
                    rgba(255,255,255, 1) 90%);
  width    : 100%;
  height   : 8em;
} */


/* Media for Screen 900 below */
@media (min-width : 220px){
    iconify-icon{
        font-size: 10px;
        color: #F4F4F4;
    }
    .text{
        font-size: .5rem;
    }
    .content{
        height: auto;
    }
    .sidevideo{
       padding: 20px 0;
       margin: 5% ;
    }
    .pdf iconify-icon{
        font-size: 70px;
        }
}
/* Media for Screen 900  above */
@media (min-width : 768px){
    iconify-icon{
        font-size: 35px;
        color: #F4F4F4;
    }
    .text{
        font-size: 1rem;
    }
    .navbtn2{
        color: #F4F4F4;
        font-weight:500;
        margin: 0 2px;
        width: 90px;
        
    }
    .scroll{
        height: 200px;
    }
    .content{
        height: 160px;
    }
    .sidevideo{
        padding: 10px 0;
        margin: 5% ;
     }
     .pdf iconify-icon{
        font-size: 80px;
        }
        .referscroll{
          height: 100vh;
        }
        .gallery iframe, .gallery span {
          height:385px;
      }
}

@media (min-width : 968px){
  .navbtn2{
    color: #F4F4F4;
    font-weight:500;
    margin: 0 2px;
    width: 110px;
  }
  .gallery iframe, .gallery span {
    height: 295px;
}
}
@media (min-width : 1200px){
  .pdf iconify-icon{
    font-size: 100px;
    }
    .referscroll{
      height: 100vh;
    }
    .navbtn2{
      color: #F4F4F4;
      font-weight:500;
      margin: 0 2px;
      width: 120px;
      
  }
  .gallery iframe, .gallery span {
    height: 354px;
}
}

@media (min-width : 1440px){
    iconify-icon{
        font-size: 40px;
        color: #F4F4F4;
    }
    .gallery iframe, .gallery span {
      height: 439px !important;
  }
    .text{
        font-size: 1.5rem;
    }
    .navbtn2{
        color: #F4F4F4;
        font-weight:500;
        margin: 0 2px;
        width: 160px;
        
    }
    .sidevideo{
        padding: 0 0;
        margin: 5% ;
     }

    /* .container{
        max-width: 1440px;
    } */
    .scroll{
        height: 350px;
        
    }
    .content{
        height: 180px;
    }
    .pdf iconify-icon{
        font-size: 140px;
        }
    .referscroll{
      height: 100vh;
    }
    .link a{
      color: #252525 !important;
    font-size: 17px;
    }
}
@media (min-width : 1600px){
  .navbtn2 {
    color: #F4F4F4;
    font-weight: 500;
    margin: 0 2px;
    width: 180px;
}.gallery iframe, .gallery span {
  height: 437px;
}
}

/* @media (min-width: 2600px){
  .navbtn2 {
    color: #F4F4F4;
    font-weight: 500;
    margin: 0 2px;
    width: 300px;
}
} */