* {
    box-sizing: border-box;
}
body {
    margin: 0px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}



#navlogin{
    float: right;
    width: 140px;
    height: 40px;
    border: 2px solid crimson;
    border-radius: 10px;
   color: crimson;
   background-color: white;
   text-align: center;
   position: relative;
   margin-top: 20px;
   padding: 1.5px;
}

nav {
    background-color: #333;
    overflow: hidden;
    flex-wrap: wrap;
   
    
}

nav a {
    text-decoration: none;
    padding: 20px;
    text-align: center;
    float: left;
    color: white;

    
}

main {
    background-color: white;
    text-align: center;
}

h2 {
    padding: 20px;
}

section:nth-child(even) {
    background-color: rgb(246, 233, 233);
}

section {
    min-height: 100vh;
    
}

video {
    padding: 10px;
}

img {
    padding: 10px;
}

section h5 {
    margin: 40px;
}


#logo{
    position: relative;
    float: left;
}



footer {
    background-color:#333;
    padding: 20px 0;
  }
  
  .footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
  }
  
  .footer-logo {
    flex: 1;
    text-align: center;
    float: left;
  }
  
  .footer-logo img {
    width: 150px;
  }
  
  .footer-column {
    flex: 1;
    padding: 0 20px;
  }
  
  .footer-column h3 {
    color:antiquewhite;
  }
  
  .footer-column ul {
    list-style-type: none;
    padding: 0;
  }
  
  .footer-column ul li {
    margin-bottom: 10px;
  }
  
  .footer-column ul li a {
    color:beige;
    text-decoration: none;
  }
  
  .footer-column ul li a:hover {
    text-decoration: underline;
  }
  
  .footer-bottom {
    margin-top: 20px;
    text-align: center;
  }
  
  .footer-bottom p {
    color:beige;
    font-size: 14px;
  }
  .footer-column p{
    color:beige;
}
iframe{
  margin: 8px;
}



main{
    width: 60%;
    height: 500px;
    margin: auto;
    margin-top: 100px;
    box-shadow: 0px 0px 3px gray;
    position: relative;
    overflow: hidden;
}
.slide{
    width: 100%;
    height: 100%;
    transition: 1s;
    position: absolute;
}
#left{
    display: flex;
    justify-content: start;
    align-items: center;
    width: 800px;
}

#intro{
    height: 80px;
    background-color: crimson;
    color: #fff;
    text-align: center;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
   
}
#obj{
   display:flex;
}
.text{
    width: 550px;
    border: 1px solid black;
    background-color:floralwhite;
    border-radius: 10px;
    margin: 5px;
    padding: 10px;
    font-family: sans-serif;
    
}

#login{
    border: 2px solid crimson;
    border-radius: 5px;
    background-color: white;
}
#im1{
    float: right;
    border-radius: 50px;
    margin: 50px;
}
#crack{
    font-size: 40px;
}
span{
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    color: crimson;
}
.topic{
    width: 400px;
    background-color:#333;
    color: #fff;
    border: 2px solid crimson;
    font-size: 20px;
}
#exam{
    display: inline-flex;
    background-color: white;
    justify-content: space-around;
    
    
}
#exam div{
    margin: 10px;
    margin-top: 50px;
    
    
}
#div2{
   width: 50%;
    height: 400px;
    padding: 10px;
    font-family: cursive;
    font-weight: 700;
    font-size: larger;
    color: brown;
    background-color: bisque;
    border: 4px solid brown;
    border-radius: 30px;
    float: right;
    overflow-y:scroll;
}
#paper1{
    border: 1px solid ;
    border-radius: 10px;
    background-color: bisque;
    padding: 10px;
    color: brown;
    font-size: larger;
    font-family: cursive;
    font-weight: 700;
    height: fit-content;
}
li h1{
    background-color: crimson;
    color: white;
    width:fit-content;
    border: 1px solid ;
    border-radius: 10px;
}
.sub_head{
    width:fit-content;
    border: 1px solid ;
    border-radius: 10px;
    background-color: rgb(248, 211, 166);
}
#no{
    list-style: none;
}
#paper2{
    border: 1px solid ;
    border-radius: 10px;
    background-color: bisque;
    padding: 10px;
    color: brown;
    font-size: larger;
    font-family: cursive;
    font-weight: 700;
    height: fit-content;
    width: fit-content;
}
#exam2{
    display: inline-flex;
    background-color: white;
    justify-content: space-around;
    
    
}
#exam2 div{
    margin: 10px;
    margin-top: 50px;
}  
#im2{
    float: right;
    border-radius: 40px;
}
#main_ex{
    margin: 5px;
    padding: 10px;
}
#main_ex h1{
  text-decoration: underline;
    color: orangered;
    width:fit-content;
    border-radius: 10px;
    font-size: 20px;
    padding: 5px;
}
tr:nth-child(even) {
    background-color:rgba(123, 244, 252, 0.356);
    font-weight: 500;
  }
  tr:nth-child(odd) {
    background-color: white;
  }
  #main_ex #optional{
    background-color: white;
    width:fit-content;
    border: none;
    text-align: center;
  }
  .video{
    display: flex;
    justify-content: space-evenly;
    

  }
  #videos{
    background-color: crimson;
    text-align: center;
    color: aliceblue;
  }
  th{
    text-transform: uppercase;
    color: brown;
  }
  table{
    padding: 5px;
    width: 100%;
  }
  td{
    text-align: center;
  }
  .video a{
    box-shadow: 0 4px 8px black;
  }
  .video iframe{
    box-shadow: 0 4px 8px black;

  }