style.css

body{
    background: black;
    width: 100%;
    height: 100%;
    display: table;


}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
    max-width: 100%;
    border: rgb(97, 97, 97) solid 1px;
    height: auto;
  }
  
  li {
    float: left;
  }
  
  li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-weight: 700;
  }
  
  li a:hover {
    background-color: #111;
  }
  
  .container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: white solid 2px;
    
  }
  
  .tt{
    text-align: center;
    color: white;
    font-weight: 700;
    flex-direction: column;
    font-family: sans-serif;
    font-size: 25px;
    align-items: center;
    justify-content: center;
}