body{
    background: linear-gradient(to right, #61c2e2 0%, #ff99cc 100%);
    margin: 0;
    padding: 0;
    scroll-behavior:smooth;
    
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: #5b0075;
  }
  
  .logo {
    width: 100px;
    height: auto;
  }
  
  .links {
    display: flex;
    align-items: center;
  }
  
  .links a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
  }
  
  .menu-toggle {
    display: none;
  }

  .heading{
    text-align: center;
    font-size: 20px;
  }

  .unit a{
    text-decoration-line: none;
    background-color: #5b0075;
    border-radius: 10px;
    padding: 10px;
    color: #fff;
  }
  .unit a:hover{
    background-color: #fff;
    color: black;
    transition-duration: 1s;
  }

  #unit1{
    width: 900px;
    border: 1px solid rgb(180, 180, 180);
    margin: auto;
    margin-top: 35px;
    border-radius: 15px;
    padding: 15px;
    background: linear-gradient(to right,rgba(255, 255, 255, 0.864),rgba(243, 243, 243, 0.968));
  }

  #unit1 h2{
    text-align: center;
  }

  .syllabus a{
    text-decoration-line: none;
    font-size: 20px;
  }

  #pds h3{
    font-size: 25px;
  }
  #vod{
    font-size: 23px;
  }

  .rd{
    font-size: 20px;
  }

  .rd ul li{
    padding: 5px;
  }
 
  .vid1{
    padding-left: 27px;
  }
  
  #pds ol li{
    padding-left: 6px;
    font-size: 18px;
  }

  #vod ol li{
    padding-left: 6px;
    font-size: 18px;
  }

  .vid1 a h3{
    width: 120px;
    text-align: center;
    padding: 5px;
    border-radius: 20px;
    color: #fff;
    background-color: darkblue;
    
  }

  .vid1 a h3:hover{
    background-color: red;
  }
   

  .vid1 a{
    text-decoration-line: none;
  }

  @media (max-width: 913px) {
    
    #unit1{
        width: 600px;
    }
    .vid1 iframe{
        width: 560px;
    }
  }
  
  @media (max-width: 600px) {

    #unit1{
        width: 350px;
    }

    nav {
      flex-direction: column;
      align-items: flex-start;
    }
  
    .logo {
      margin-bottom: 20px;
    }
  
    .links {
      display: none;
    }
  
    .menu-toggle {
      display: block;
      cursor: pointer;
    }
  
    .menu-toggle .bar {
      width: 30px;
      height: 3px;
      background: white;
      margin: 5px auto;
    }

    .vid1 iframe{
        width: 300px;
        height: 170px;
        padding-left: 10px;
      }
  }