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

body {
  margin: 0;
  padding: 0;
  background-image: linear-gradient(90deg, #000000, #000030, #6000B0, #000030);
  background-color: #000040;
  color: #EEEEEE;
  font-family: Tahoma, Verdana, Arial, sans-serif;
  font-size: 16px;
}

p {
  word-wrap: break-word;
}

#page {
  margin: 40px 0 0 150px;
  left: 150px;
  top: 40px; /*This has to match hight of #nav_top so nav-top dosesnt overlap as its not in the same flow*/
  width: 100%;
  background-color: #FFFFFF;
  color: #000000;
  overflow: hidden;
  opacity: .8;
}

#nav_top {
  margin: 0;
  padding: 0;
  top: 0;
  left: 150px;
  width: 100%;
  position: fixed;
  height: 40px;
  background-image: linear-gradient(90deg, #202020, #000000);
  background-color: #202020;
  display: block;
}

#nav_top ul {
  margin: 0;
  padding: 0;
  height: inherit;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
}

#nav_top ul li {
  margin: 0;
  padding: 0;
  height: inherit;
  text-decoration: none;
  list-style-type: none;
  text-align: left;
  vertical-align: middle;
  flex: 20px;
  font-weight: bold;
  justify-content: center;
  display: flex;
  align-items: center;
}

#nav_top ul li:hover {
  background-color: #303030;
}

/* Sub-menu */
#nav_top ul ul {
  display: none;
  position: absolute;
  top: 100%;
  height: fit-content;
}

#nav_top ul ul:hover {
  display: flex;
}

/*popup sub-menu*/
#nav_top ul li:hover > ul {
  display: inherit;
}

#nav_top ul ul li {
  width: inherit;
  min-width: inherit;
  display: block;
  position: relative;
}

#footer {
  background-image: linear-gradient(90deg, #000000, #000030, #6000B0, #000030);
}

#footer p {
  text-align: center;
  margin: 20px;
}

#nav_left {
  margin: 0;
  top: 0;
  left: 0;
  height: 100%;
  width: 150px;
  position: fixed;
  background-image: linear-gradient(#202020, #000000);
  background-color: #202020;
}

#nav_left ul {
  margin: 0;
  padding: 0;
  text-align: left;
}

#nav_left h1 {
  padding: 0;
  margin: 10px;
  text-align: center;
}

#nav_left h2 {
  margin: 50px 10px 10px 10px;
  padding: 0;
  text-align: left;
}


#nav_left ul li {
  margin: 0;
  padding: 0;
  height: inherit;
  text-decoration: none;
  list-style-type: none;
  text-align: left;
  flex: 20px;
  font-weight: bold;
}

#nav_left ul li:hover {
  background-color: #303030;
}