.topnav {
    background-color: #333;
    overflow: hidden;
  }
  
  /* Style the links inside the navigation bar */
.topnav a {
    float: left;
    color:white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
  }
  
  /* Change the color of links on hover */
.topnav a:hover {
    background-color: gray;
    color: black;
  }
  
  /* Add a color to the active/current link */
  
.topnav a.active {
    background-color: black;
    color: white;
  }

  body{
    background-image: url(m57.jpg);
    background-size: 100vh auto;
    color: white;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.2;
    min-height: 100vh;
    min-width: auto;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
  }

  .emptyuniverseeq{
  display: flex;           /* Use flexbox for centering */
  justify-content: center; /* Center horizontally */
  align-items: center;     /* Center vertically (optional) */
  text-align: center;      /* Center text within the div */
  font-size: 2vw;
  color: white;
  }

.emptycurveduniverseeq{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .solutionemptyuniverse{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq2{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq3{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .guesstheformula{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .leftguess{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .rightguess{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq4{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq5{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq6{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .matteruniverseeq7{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .radiationuniverseeq1{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .radiationuniverseeq2{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  .radiationuniverseeq3{
    display: flex;           /* Use flexbox for centering */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically (optional) */
    text-align: center;      /* Center text within the div */
    font-size: 2vw;
    color: white;
  }

  h1{
    text-align: center;
  }