.letter-style {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
   overflow-x: hidden;
    overflow-y: hidden;
  -- background-color: #7CFC00;
  background-color: #cce0ff;


}




.topnav a {
  float: left;
  display: block;
  -- color: #f2f2f2;
  color: red;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;

}

/* Add an active class to highlight the current page */






.topnav .icon {
  display: none;
}






/* Dropdown container - needed to position the dropdown content */
.dropdown {
  float: left;
  overflow: hidden;
}

/* Style the dropdown button to fit inside the topnav */
.dropdown .dropbtn {
  font-size: 17px;
  border: none;
  outline: none;
  color: #FF0000;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

/* Style the dropdown content (hidden by default) */
.dropdown-content {
  display: none;
  flex-direction: column;
   opacity:0;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
  max-height: 40px;
}

/* Style the links inside the dropdown */
.dropdown-content a {
  float: none;
  color: #ff8080;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

/* Add a dark background on topnav links and the dropdown button on hover */
.topnav a:hover, .dropdown:hover .dropbtn {
  --background-color: #555;
  -- background-color: #7CFC00;
background-color: #9edbf3 ;
  color: #FF0000;
 display: block;


}

/* Add a grey background to dropdown links on hover */
.dropdown-content a:hover {
  background-color: green;
  color: #ff8080;


}

/* Show the dropdown menu when the user moves the mouse over the dropdown button */
.dropdown:hover .dropdown-content{

    visibility: visible;
    opacity: 1;
    -- transition: ease-in 700ms;
    -- transition: all 2000ms ease;
    -- transform: translateY(0);
    --     transition: all .7s ease-out;
    max-height: 100vh;
    display: block;

}

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

}



/**
 * Mobile Mode
 */
@media screen and (max-width: 780px) {

.topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }

.topnav a:not(:first-child), .dropdown .dropbtn {
    display: none;
  }


  .topnav a.icon {
    float: right;
    display: block;
  }

}




@media screen and (max-width: 780px) {




    .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }

.topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
    padding: 10px;


  }

  .topnav.responsive .dropdown {
    float: none;

  }
    .topnav.responsive .dropdown-content {
    position: relative;}
    .topnav.responsive .dropdown .dropbtn {
      visibility: visibility;
        opacity: 1;
      width: 100%;
      text-align: left;
      display : block;
    }

}



</style>