* {
  box-sizing: border-box;
}

/* style the main body*/
body {
  background-color: #e6e6e6;
  margin: 0;
  font-family: arial, helvetica, sans-serif;
}

/* Style the header */
.header {
  background-color: #ffffff;
  padding: 30px;
  text-align: center;
}

.footer {
  background-color: #f44336;
  padding: 20px;
  text-align: center;
  color: #ffffff;
}
/*style the nav bar*/
.topnav {
  overflow: hidden;
  background-color: #f44336;
  position: sticky;
  top: 0;
  border-radius: 20px;
}

.topnav a {
  float: left;
  display: block;
  color: #ffffff;
  text-align: center;
  padding: 14px 40px;
  text-decoration: none;
  font-size: 18px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {  position: sticky;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}

.content {
	padding: 30px 50px;
	  background-color: #e6e6e6;

}	

/*style the top section under nav bar*/
.maincontent{
  padding: 15px 75px;
}

/* Create three equal columns that floats next to each other */
.column {
  float: left;
  width: 33.33%;
  padding: 15px 30px;
}
.column2 {
  float: left;
  width: 50%;
  padding: 15px 30px;
}
.column3 {
  float: left;
  width: 99%;
  padding: 15px 30px;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Responsive layout - makes the three columns stack on top of each other instead of next to each other */
@media screen and (max-width:600px) {
  .column {
    width: 100%;
  }
  .column2 {
    width: 100%;
  }
  .column3 {
    width: 100%;
  }
 
 /*anything within the responsivelayout*/
 .content {
	padding: 0px;
}
  
}

/*Images*/
/*top image*/
.imagemain {
	float: right;
	width: 127px;
	height: 100px;
	padding: 15px;
}
.buttonmain {
	float: right;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.imginstructor {
	float:right;
	padding: 10px;
}

.imagecontent {
	float: right;
	width: 224px;
	height: 299px;
	padding: 15px;
}	

.imageleft {
	float: left;
	width: 64px;
	height: 64px;
	padding: 15px;
}	

.imageright {
	float: right;
	padding: 15px;
}

h3, h4 {
	text-align: center;
	padding: 10px 0px;
	font-weight: bold;
}

.instructors {
	text-align:left;
}

.collapsible {
  background-color: #777;
  color: white;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.active, .collapsible:hover {
  background-color: #555;
}