body, h1, h2, p, ul, li {
    margin: 0;
    padding: 0;
}

body {
    font-family:'Times New Roman', Times, serif;
    background-color: teal;
}

header {
    background-color:  gray;
    color: #fff;
    text-align: center;
   
}
nav {
    background-color: gray;
    color: #fff;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;

}

nav a {
    text-decoration: none;
    color: #fff;
    margin: 0 20px;
}

.column {
    float: right;
    width: 50%;
    padding: 5px;
    position: relative;
    box-sizing: border-box;
  }
  
  .row::after {
    content: "";
    clear: both;
    display: table;
  }

  footer {
    bottom: 0;
    left: 0;
    right: 0;
    background-color:gray;
    color: #fff;
    text-align: center;
    padding: 10px;
}

.video{
    text-align: center;
    padding: 10px;
}