body {
  background-color: #272727;
  color: white;
  font-family: Segoe UI;
  margin: 0px;
}
.header {
  background-color: #151515;
  align-content: center;
}
.logo {
  height: 25px;
  width: auto;
}
.header a {
  text-decoration: none;
  font-weight: bold;
  color: white;
  overflow: hidden;
  font-size: 20px;
  align-content: center;
  margin-left: 20px;
  padding: 15px
}
.header a:hover {
  background-color: #ffffff;
  opacity: 25%;
}