/*boday background color and font*/
body 
{
  background-color: #000000;
  font-family:  "Times New Roman", Times, serif;
  font-size: 20px;
  color: #9dd9f3;
  background-image: linear-gradient(40deg, rgba(208,232,234,.5) 50%, transparent 0), 
  linear-gradient(rgba(208,232,234,.5) 50%, transparent 0);
}

/*header 1 */
h1 {
    color: #66FCF1;
    text-align: center;
    padding: 5px;
    margin-left: 10%;
    margin-right: 10%;
    font-size: 30px;
}

h2
{
    color: rgb(246, 73, 131);
    text-align: left;
    margin-left: 10%;
    margin-right: 10%;
    font-size: 25px;
}

h3
{
  margin-left: 10%;
  margin-right: 10%;
  color: #15ff00;
  text-align: center;
  font-size: 26px;
}

h4
{ color: #ffb8ed;
  text-align: left;
  font-size: 20px;
  margin-left: 10%;
  margin-right: 10%;
}



/*paragraph font, color and position*/
p {
  font-size: 20px;
  text-align: left;
  color: #FFFFFF;
  margin-left: 10%;
  margin-right: 10%;
  text-align: justify;
}

/*paragraph hover link*/
h3 a {
  color: rgb(255, 136, 0);
  font-size: 26px;
  border: 1px solid rgb(212, 255, 0);
  
}

h3 a:hover{
  color: rgb(221, 255, 0);
  font-size: 24px;
}

span {
  background:#140a8c ;
  border: 1px solid black;
}

/*img circle*/
.circle {
  display: block;
  width: 20%;
  height: 10%;
  justify-content: center;
  padding: 5px;
  border-radius: 50%;
}



/* navigation bar */
.navbar {
  list-style-type: none;
  padding: 20px;
  margin-left: 10%;
  margin-right: 10%;
  display: flex;
  background-color: #45A29E;
  font-size: 25px;
  border-radius: 20px;
}

/* Style the navigation bar links */
.navbar a {
  color: white;
  padding: 14px 20px;
  text-decoration: none;
  text-align: center;
  /* border-right: 2px solid rgb(0, 201, 157);
  border-left: 2px solid rgb(0, 201, 157); */
}

/* Change color on hover */
.navbar a:hover{
  background-color: #000000;
  border-radius: 20px;
}

.dropdown {
  float: left;
  overflow: hidden;
  /* text-align: center; */
  padding: 20px;
  text-align: center;
 
}


.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;
  border-radius: 20px;
}

.dropdown-content a {
  float: none;
  color: rgb(255, 0, 0);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: center;
  border-radius: 20px;
}

.dropdown-content a:hover {
  background-color: rgb(70, 70, 70);
  
}

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

/*media screen size change */
@media screen and (max-width: 600px) {
  .navbar {   
    flex-direction: column;
    font-size: 20px;
    padding: 0;

  }
  body {
    background-color: #5F9EA0;
    background-image: linear-gradient(70deg, rgba(208,232,234,.5) 60%, transparent 0), 
    linear-gradient(rgba(208,232,234,.5) 50%, transparent 0);
    margin-left: 0px;
    margin-right: 0px;
    
  }

  /*header 1 */
h1 {
  color: #66FCF1;
  text-align: center;
  margin-left: 0;
  margin-right: 0;
  padding: 0;
  font-size: 25px;
}

h2
{
  color: #ffb8ed;
  text-align: center;
  margin-left: 0;
    margin-right: 0;
    padding: 0;
  font-size: 20px;
}

h3
{
  margin-left: 0;
  margin-right: 0;
  padding: 0;
color: #15ff00;
text-align: center;
font-size: 18px;
}

h4
{ color: #ffb8ed;
  text-align: left;
  font-size: 18px;
  margin-left: 0;
  margin-right: 0;
}

/*paragraph font, color and position*/
p {
  font-size: 16px;
  text-align: justify;
  color: #FFFFFF;
  margin-left: 0;
  margin-right: 0;
  padding: 0;
 
  }
}




/*middle box*/
.lightbox {
background-color: #1f2833 ;
opacity: 0.9;
padding: 20px;
margin-left: 10%;
margin-right: 10%;
}

/*image */
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  margin-top: 20px;
  margin-bottom: 25px;
  width: 50%;
}

footer 
{
background-color: #45A29E ;
opacity: 0.9;
padding: 10px 20px 10px 20px;
margin-left: 10%;
margin-right: 10%;
text-align: left;

}

footer a {
  color: rgb(255, 255, 255);
}

footer a:hover{
  color: Red;
}


/*reference text css*/
.left a
{
color:#FFFFFF;
text-align: left;
margin-left: 10%;
margin-right: 10%;
font-size: 15px;
padding: 5px;
}

.left a:hover{
  color: #ffd500;
}

ul li {
  margin-left: 10%;
  margin-right: 10%;
}