.centered {
    position: fixed; /* or absolute */
    top: 50%;
    left: 40%;
  }

.centered2 {
    position: fixed; /* or absolute */
    top: 55%;
    left: 27%;
  }

  nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #f1f1f1;
    text-align: center;
    padding: 10px 0;
  }

  nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
  }

  nav ul li {
    display: inline-block;
    margin: 0 10px;
  }

.a {
    color: #55595c
}
a:hover {
  color: black;
}