* {
  background-color: #222222;
  color: white;
  font-family: Arial, sans-serif;
  padding: 0;
  margin: 0;
}

main {
  padding: 20px;
}

input[type="text"] {
  width: 100%;
  padding: 10px 14px;
  font-size: 16px;
  border: 3px solid white;
  border-radius: 6px;
  background-color: #222222;
  color: white;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
  
nav {
  position: fixed;
  top: 0;
  width: 100%;
  ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #222222;
  }

  ul li {
    float: left;
    padding: 14px 16px;
    text-align: center;
  }

  ul li a {
    display: block;
    color: white;
    text-align: center;
    text-decoration: none;
  }
}

/*
.center {
  display: flex;
  justify-content: center;
  br {
    display: block;
    content: "";
    margin-top: 0;
  }
}
*/
.post a {
  color: white;
  text-decoration: none;
}

ul {
  margin-left: 30px;
}