body {

}
.sl-nav ul{
    background-color: #4d5d79;
    text-align: center;
    padding: 0;
    margin: 0;
}
.sl-nav li{
  display: inline-block;
}
.sl-nav a{
  text-decoration: none;
  color: #fff;
  width: 100px;
  display: block;
  padding: 15px;
  font-size: 17px;
  font-family: Helvetica;
  transition: 0.4s;
}
.sl-nav a:hover {
  background: #8ca9db;
  transition: 0.6s;
}
.sl-center-img {
  display: block;
 margin-left: auto;
 margin-right: auto;
 margin-top: 20px;
 width: 300px;
}

#btn{
  color: #fff;
  background: #4d5d79;
  padding: 10px;
  margin-left: 0px;
}
#pass {

}
#user {

}