body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif, sans-serif;
    line-height: 1.2;
    margin-left: 150px;
    margin-right: 150px;
    padding: 0;
    background: #fff;
    font-size: 14px;
    color: #333;
}

header {
    background: #fff;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
    
}

nav ul {
    background: #fff;
    color: #03b7f0;
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: #03b7f0;
    text-decoration: none;
    font-size: 15px;
}
video {
    position: fixed;
    top: 170px;
    bottom: 20px;
    width: 50%;
}
.center {
  display: fixed;
  margin-left: auto;
  margin-right: auto;
  width: 90%;
}
footer {
    text-align: left;
    padding: 1rem 0;
    background: #fff;
    color: #03b7f0;
    position: absolute;
    bottom: 0;
    width: 80%;
}