* {
  box-sizing: border-box;
  margin:0px;
  padding:0px;
}



	/* header style open */

#header{
	height:70px;
	width:100%;
	
}

#logo{
	position:relative;
	height:70px;
	width:98%;
	background-color:white;
	font-family:poppins;
	font-size:45px;
	line-height:100px;
	color:red;
	letter-spacing:10px;
	-webkit-text-stroke-width:3px;
	text-shadow:3px 3px 5px black, 2px 2px 4px black;
	float:left;
	overflow:hidden;
	text-align:right;
	
}

/* header style close */

/* nav style open */
#nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-image: linear-gradient(to right top,  #696969, #696969, #696969, #696969, #696969, #696969);
}

#nav_mob{
	display:none;
	
}

#nav li {
    float: left;
	
}

li a, .dropbtn {
    display: inline-block;
    color: white;
    text-align: center;
    padding:14px 30px; 
    text-decoration: none;
	letter-spacing:2px;
	
}
.dropdown:hover{
	background-image: linear-gradient(to right top, #696969, #696969, #696969, #696969, #696969, #696969, #696969, white);
}

li a:hover, .dropdown:hover .dropbtn {
    background-color: transparent;
	
}

li.dropdown {
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.dropdown-content a:hover {
	background-color: #f1f1f1
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* nav style close */

/* social style open */

#social{
	width:80px;
	height:120px;
	float:left;
}

.fa {
  padding: 5px;
  font-size: 40px;
  width: 50px;
  height: 30px;
  text-align: center;
  text-decoration: none;
  margin: 5px 1px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  position:sticky;
}

.fa:hover {
    width:70px;
}

.fa-facebook {
  background-image: linear-gradient(to left top, #696969, #696969, #696969, #696969, #696969);
  color: white;
}

.fa-google {
  background-image: linear-gradient(to left top, #696969, #696969, #696969, #696969, #696969);
  color: white;
}


.fa-youtube {
  background-image: linear-gradient(to left top, #696969, #696969, #696969, #696969, #696969);
  color: white;
}

/* social style close */

/* select course   */

.select_course{
	font-size:50px;
	padding-left:5%;
	margin-top:20px;
	font-family:poppins;
	line-height:100px;
	color:gray;
	letter-spacing:10px;
	text-shadow:1px 1px 2px white, 1px 1px 2px white;
	float:left;
	overflow:hidden;
	
}

.html{
	width:100%;
	height:auto;
	margin-top:200px;
	
	
}

.html a{
	text-decoration:none;
}

 .html div{
            position:relative;
            background: #fff;
            width:500px;
            height:120px;
            padding-top:30px;
            margin:auto;
            text-align:center;
            font-size:40px;
            -webkit-box-shadow: 0 0 5px #aaa, 0 0 30px #ddd inset;
            -moz-box-shadow: 0 0 5px #aaa, 0 0 30px #ddd inset;
            box-shadow: 0 0 5px #aaa, 0 0 30px #ddd inset;
			color:gray;
			
         } 
.html div:before{
            content:'';
            width:50%;
            height:50%;
            max-width:100px;
            position:absolute;
            border:1px solid;
            z-index:-1;
            -webkit-box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            -moz-box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            -webkit-tran sform: skew(-15deg) rotate(-10deg);
            -moz-transform: skew(-15deg) rotate(-10deg);
            transform: skew(-15deg) rotate(-10deg);
            bottom:8px;
            left:6px;
			
         }
 .html div:after{
            content:'';
            width:50%;
            height:50%;
            max-width:100px;
            position:absolute;
            border:1px solid;
            z-index:-1;
            -webkit-box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            -moz-box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            box-shadow:1px 12px 15px rgba(0,0,0,0.3);
            -webkit-transform: skew(15deg) rotate(10deg);
            -moz-transform: skew(15deg) rotate(10deg);
            transform: skew(15deg) rotate(10deg);
            bottom:8px;
            right:6px;
			
         }

.html div:hover{
		
	        
            width:40%;
            
            
	
	
}		 

/* footer   */

.footer {
   position: fixed;
   left: 0;
   bottom: 0;
   width: 100%;
   background-color: red;
   color: white;
   text-align: center;
}




/*   topic */
#main{
	width:100%;
	min-height:auto;
	
	
}

#left_box{
	width:30%;
	height:auto;
	float:left;
	border-bottom:1px solid gray;
}


#right_box{
	
	width:70%;
	height:auto;
	float:right;
	margin-top:70px;
	padding-left:4%;
	
}

#topic ul{
	list-style:none;
	margin-top:50px;
}

#topic ul li{
	
	border:1px solid gray;
	margin-top:2px;
	height:10px;
}

#topic ul a{
	text-decoration:none;
	letter-spacing:2px;
	text-align:left;	
	
}


.button {
    position: relative;
    background-color: white;
    border: none;
    font-size: 16px;
    color: gray;
    padding: 20px;
    width: 100%;
    text-align: left;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    text-decoration: none;
    overflow: hidden;
    cursor: pointer;
}

.button:after {
    content: "";
    background: gray;
    display: block;
    position: absolute;
    padding-top: 300%;
    padding-left: 350%;
    margin-left: -20px!important;
    margin-top: -120%;
    opacity: 0;
    transition: all 0.8s
}

.button:active:after {
    padding: 0;
    margin: 0;
    opacity: 1;
    transition: 0s
}

#topic ul a:hover{
	letter-spacing:2.5px;
}

#video{
	border:2px solid gray;
	box-sizing: border-box;
	border: 1px solid;
    padding: 10px;
    box-shadow: 5px 10px #888888;
	width:640px;
	height:360px;
}


/* mobile navigation */

			#nav_ul{
				width:100%;
				height:auto;
				position:relative;
				color:white;
			}
			
			#nav_ul li{
				list-style:none;
				width:100%;
				background-color:gray;
				padding:5px;
				margin:1px;
			}
			
			
			#nav_ul li ul{
				display:none;
			}
			
			#nav_mob{
				text-align:center;
				height:auto;
				width:100%;
			}
			#main_menu{
				display:none;
				letter-spacing:2px;
			}
			
		
			#main_menu li ul li{
				margin:1px;
				background-color:white;
			}
			
			#main_menu li ul li a{
				text-decoration:none;
				color:black;
				display:block;
				letter-spacing:2px;
			}
			
			#main_menu li{
				text-decoration:none;
				color:black;
				display:block;
				letter-spacing:2px;
			}
			
			#main_menu a{
				text-decoration:none;
			}
			

/*  topic nav   */			

			.topnav{
				display:none;
				
			}
	
			#click_lesson{
				display:none;
				margin-left:15%;
				margin-top:-7%;
				color:gray
			}
			
.next_button {
    position: relative;
    background-color: white;
    border: none;
    font-size: 25px;
    color: gray;
    padding: 20px;
    width: 250px;
	height:70px;
    text-align: center;
    text-decoration: none;
    overflow: hidden;
    cursor: pointer;
	margin-left:25%;
	letter-spacing:2px;
	word-spacing:3px;
	text-transform:uppercase;
	border:1px solid gray;
	margin-top:50px;
	margin-bottom:300px;
	font-family:Cinzel;
}


.next_button:hover{
    
	border:2px solid gray;
	word-spacing:5px;
}


			
@media screen and (max-width:580px){
		#logo{
			text-align:center;
			line-height:80px;
			font-size:18px;
			color:red;
			margin-left:2%;
		}
		
		#nav{
			display:none;
			
		}
		#social{
			display:block;
		}
		.select_course{
			font-size:18px;
			overflow:hidden;
			letter-spacing:5px;
			
				
		}
		.html{
			width:70%;
			
		}

		.html div{
            
            width:90%;
            font-size:30px;
            margin-left:25%;
         } 

		
		.html div:hover{
		        
            width:100%;
        
		}		 
		#left_box{
			display:none;
			width:100%;
		}
	
		#right_box{
			width:100%;
			
			
		}
		#video{
			width:300px;
			height:200px;
		}
		
		
		#nav_mob{
			display:block;
	
		}
		.topnav{
			display:block;
			
		}
		
		#click_lesson{
				display:block;
				
		}
		
		.next_button {
			
			margin-left:15%;
	
		}
		table{
			width:100%;
			table-layout: fixed;
		}
		.tbl-content{
		height:300px;
		overflow-x:auto;
		margin-top: 0px;
		border: 1px solid rgba(255,255,255,0.3);
		}
		th{
		padding: 20px 15px;
		text-align: left;
		font-weight: 500;
		font-size: 12px;
		color: #fff;
		text-transform: uppercase;
		background-color: rgb(72, 228, 52);
		}
		td{
		padding: 15px;
		text-align: left;
		vertical-align:middle;
		font-weight: 300;
		font-size: 12px;
		color: red;
		background-color: yellow;
		border-bottom: solid 1px rgba(255,255,255,0.1);
		}
		
		
}