body {
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

h1 {
  margin-left: 0;
  margin-right: 0;
  display: flex;
  justify-content: center;
  color: rgb(10, 42, 100);
}

nav {
  height: 50px;
  margin: 0;
  z-index: 99;
  position: relative;
  display: flex;
  flex-direction: row;
  justify-content: center;
}

.navbar {
  height: 50px;
  padding: 0;
  margin: 0;
  position: absolute;
}

.navbar li {
  height: auto;
  width: 135.8px;
  float: left;
  text-align: center;
  list-style: none;
  font: normal bold 13px/1em Arial, Verdana, Helvetica;
  padding: 0;
  margin: 0;
  background-color: rgba(68, 68, 68, 0.5);
}

.navbar a {
  padding: 18px 0;
  border-left: 1px solid #ccc9c9;
  text-decoration: none;
  color: white;
  display: block;
}

.navbar li:hover,
a:hover {
  background-color: #444444;
}

.navbar li ul {
  display: none;
  height: auto;
  margin: 0;
  padding: 0;
}

.navbar li:hover ul {
  display: block;
}

.navbar li ul li {
  background-color: #444444;
}

.navbar li ul li a {
  border-left: 1px solid #444444;
  border-right: 1px solid #444444;
  border-top: 1px solid #c9d4d8;
  border-bottom: 1px solid #444444;
}

.navbar li ul li a:hover {
  background-color: #a3a1a1;
}