@import url('https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap');


body{
    background-color: #272727;
    color: white;
    font-family: 'poppins',sans-serif;
    scroll-behavior: smooth;
    padding: 0%;
    margin: 0%;
}
.topnav{
    padding: 0px;
    margin: 0%;
    overflow: hidden;
    position: absolute;
    position: -webkit-sticky;
  position: sticky;
  top: 0;
}
.tnav{
  
    overflow: hidden;
}

.tnav ul{
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #202020;

}
.tnav li{
    float: left;
}
.tnav li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 20px;
    font-weight: 500;
  }
.tnav li a:hover{
   color: #3AB795;
   transition: 0.3s ease-in-out;
   border-bottom:3px solid #3AB795;
   background-color: #323232;
}
.tnav li a:not(:hover){
    transition: 0.3s ease-in-out;
}

.tnav img{
    margin:5px 15px 0px ;
    margin-bottom: 0%;
    height: 40px;
}

    /*end*/
/*side nav*/
.sidenav {
    margin:0% ;
    height: 90%;
    width: 20%;
    position: fixed;
    z-index: 1;
    left: 0%;
    background-color: #202020;
    overflow-x: hidden;
    padding-top: 2rem;
    
    
  }
  
  .sidenav a, .dropdown-btn {
    padding: 15px 30px;
    padding-top: 1rem;
    text-decoration: none;
    font-size: 20px;
    color: white;
    font-weight: 500;
    display: block;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
  
  }
  
  /* On mouse-over */
  .sidenav a:hover, .dropdown-btn:hover {
    border-left: 5px solid #3ab795;
    border-bottom: 3px solid #3ab795;
    border-radius: 200px;
    background-color: #454545;
    transition: 0.2s;
  }
  
  .active {
  
    color: #3AB795;
  }
  
  
  .dropdown-container {
    display: none;
    padding-left: 0rem;
  }
  .dropdown-container a{
    font-size: 15px;
    padding-left: 1rem;    
  }
  
  .fa-caret-down {
    float: right;
    padding-right: 0px;
  }
  
#al{
    color: #3ab795;
}
/*Content */
.content{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.container{
    max-width: 800px;
    border-bottom: 1px solid #555;
}
.container p{
    font-size: 20px;
}
.container ul{
    list-style-type: none;
}

/*Algorithm */
.algorithms{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.algorithm{
    max-width: 750px;
    
}
.algorithm pre{
    background-color: #111111;
    color: white;
    font-size: 18px;
    padding: 1rem;
    overflow: hidden;
}
.algorithm{
    border-bottom: 1px solid #555;
    padding: 1rem ;
}
#comment{
    color: rgba(194, 81, 81, 0.945);
}
#code{
    color: #3ab795;
}
/*responsive tabs */
.programs{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}
.programhead{
    font-size: 20px;
    font-weight: 300;
}
.mytabs{
    display: flex;
    flex-wrap: wrap;
    max-width: 700px;
    /*margin: 50px auto;*/
    

}
.mytabs a{
    text-decoration: none;
    color: white;
   background-color: #3ab795;
    float: right;
    padding: .5rem;
    margin-right: .5rem;
    font-size: 15px;
}
.mytabs a:hover{
    background-color: #2AD8C6;
    transition: 0.3s ease-in-out;
}
  .mytabs input[type="radio"]{
    display: none;
  }
  .mytabs label{
    padding: 20px;
    background-color: transparent;
    color: #3ab795;
    margin: 0%;
    font-size: 18px;
    
  }

  .tab{
      position: relative;
      overflow-x :hidden;
      overflow-y: scroll;
      width: 800px;
      max-height: 600px;
      background-color: #171717;
      border: 1px solid white;
      padding: 1rem;
      
  }
  /*scroll bar*/
::-webkit-scrollbar{
    width: 0px;
}

  .mytabs .tab{
    /*width: 100%;*/
    order: 1;
    display: none;
  }
  .tab pre{
      background-color: #171717;
      color:white;
      margin: 0%;
      max-width: 800px;
      font-size: 15px;
  }
  .tab code {
      display: block;
      width: 800px;
      
  }

  .mytabs input[type="radio"]:checked +label+ .tab{
    display: block;
    width: 800px;
  }
  .mytabs input[type="radio"]:checked+label{
  /*  background: linear-gradient(151deg, rgba(10,163,158,1) 0%, rgba(86,28,140,1) 100%);
    */
      background-color: #3ab795;
      color: white;
      border: 1px solid white;
  }

/*output*/
.output{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;    
}

.outputs{
    padding: 20px;
    background-color: #171717;
    color: white;
    display: block;
    width: 700px;
    
}

/*time complexity*/
.time {
    display:flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.times{
    max-width: 800px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
}

.note{
    background-color: #3ab795;
    padding: 10px;
    font-size: 20px;
    border-radius: 5px;
    margin-top: .5rem;
}
.time h3{
    padding: 1rem ;
    display: block;
    border-top: 1px solid #555;
    width: 800px;
}

/*visual */
.visual{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}
.visuals{
    display: block;
    width: 800px;
    
}

.visual h3{
    display: block;
    width: 800px;
    padding: 1rem;
    border-top: 1px solid #555;
}
.visuals h4{
    background-color: #3ab795;
    padding: 10px;
    font-size: 20px;
    border-radius: 5px;
}
.visual a{
    text-decoration: none;
    padding: 10px 30px;
    background-color: #3ab795;
    color: white;
    font-size: 20px;
    border-radius: 8px;
}
.visual a:hover{
   background-color: #2AD8C6;
   transition: 0.3s ease-in-out;
}

/*video*/
.video{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
/*buttons next or previ*/
.forward{
    padding: 3rem;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}
.previ{
    display: block;
    width: 400px;
    padding: 3rem;
    text-align: left;
}
.next{
    display: block;
    width: 400px;
    padding: 2rem;
    text-align: right;
}
.forward a{
    text-decoration: none;
    color: white;
    background-color: #3ab795;
    border-radius: 5px;
    font-size: 18px;
    padding: .5rem;
}
.forward a:hover{
    background-color: #2AD8C6;
    text-decoration: underline;
    transition: 0.3s ease-in-out;
}
/*dropdown*/