img {
        width: auto;
        border-width: 2px;
        border-color: #000000;
        border-style: solid;
        border-radius: 5px;
        padding: 5px;
        display: block;
        margin: auto;
        margin-bottom: 5px;
        margin-top: 5px;

 }

 em {
        font-weight: bold;
        font-style: normal;
        color: rgb(0, 0, 0);
 }
        
a{
        font-family: Arial, Helvetica, sans-serif;
        font-weight: bold;
        color: #000000;
}


p{
        margin-left: 10px;
       font-weight: normal;
       font-size: 25px;
       font-family: Arial, Helvetica, sans-serif;
       margin-bottom: 5px;
       margin-top: 5px;
       text-align: center;
       color: #000000;

        }

 h1{
       text-align: center;
       font-family: Arial;
       font-weight: bold;
       color: #000000;
        }

  a{
       text-align: center;
       font-size: 0%;
       
        }

.flex-container {
        display: flex;
        flex-wrap: nowrap;
        background-color: rgb(255, 255, 255);
}

.flex-container > div {

        background-color: #ffffff;
        width: 100px;
        margin: 10px;
        text-align: center;
        line-height: 75px;
        font-size: 30px;
        font-weight: bold;
        color: black;

}

nav {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;

      }
nav a {

        font-family: Arial, Helvetica, sans-serif;
        font-size: medium;
        color: #000000;
        display: block;
        padding: 10px 20px;
        margin-bottom: 5px;
        text-align: center;
        background-color: rgb(255, 255, 255);
        border-width: 2px;
        border-color: #000000;
        border-style: solid;

      }
nav a:hover {
        background-color: #aaaaaa;
        color: #000000;
      }

iframe{
        
width: 100;
height: 100;
        border-width: 2px;
        border-color: #000000;
        border-style: solid;
        border-radius: 5px;
        padding: 5px;
        display: block;
        margin: auto;
        margin-bottom: 5px;
        margin-top: 5px;

}