.topnav {
  overflow: hidden;
  background-color: #ffffff;
  border-top:1px solid #000000;
  margin:auto;
  display: flex;
  justify-content: center;
  padding: 10px;
  font-family:Bree Serif, Oxygen;
  font-size: 1.0rem;
}

.topnav a {
  float: left;
  display: block;
  color: inherit;
  text-align: center;
  padding: 14px 16px;
  margin:auto;
  text-decoration: none;
  border-left:0px solid;
  border-right:0px solid;
}

.topnav a:hover {
  background-color: #ffd400;
  color: #ffffff;
  border-radius:20px;
}

.topnav a.active {
  background-color: #ffffff;
  color: #ffd400;
}

.topnav .icon {
  display: none;
}

#menu {
	display:none;
	visibility:hidden;
}

@media (max-width: 768px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
  
#menu {
	display:block;
	visibility:visible;
}

#myTopnav {
	display:none;
	visibility:hidden;
}

#menu {
  z-index: 2;
}

#menu-bar {
  width: 45px;
  height: 40px;
  margin: 30px 0 20px 20px;
  cursor: pointer;
}

.bar {
  height: 5px;
  width: 100%;
  background-color: #ffd400;
  display: block;
  border-radius: 5px;
  transition: 0.3s ease;
}

#bar1 {
  transform: translateY(-4px);
}

#bar3 {
  transform: translateY(4px);
}

.nav {
  transition: 0.3s ease;
  display: none;
}

.nav ul {
  padding: 0 22px;
}

.nav li {
  list-style: none;
  padding: 12px 0;
}

.nav li a {
  color: white;
  font-size: 20px;
  text-decoration: none;
}

.nav li a:hover {
  font-weight: bold;
}

.menu-bg, #menu {
  top: 0px;
  left: 0px;
  position: fixed;
}

.menu-bg {
  z-index: 1;
  width: 0;
  height: 0;
  margin: 30px 0 20px 20px;
  background: radial-gradient(circle, #ffd400, #ffd400);
  border-radius: 50%;
  transition: 0.3s ease;
}

.change {
  display: block;
}

.change .bar {
  background-color: white;
}

.change #bar1 {
  transform: translateY(4px) rotateZ(-45deg);
}

.change #bar2 {
  opacity: 0;
}

.change #bar3 {
  transform: translateY(-6px) rotateZ(45deg);
}

.change-bg {
  width: 520px;
  height: 760px;
  transform: translate(-60%,-30%);
}
  
}