doc.css

*, *::before, *::after {
    margin:0;
    padding: 0;
    box-sizing: border-box;
}

html,body {
    height: 100vh;
    display: flex;
    flex-direction: column;
    width: 100vw;
    font-family: sans-serif;
    font-weight: 500;
}
ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #ffffff;
  
}


nav {
  height: 120px;
  display: flex;
  align-content: center;
  align-items: center;
  justify-content: space-between;
  /* justify-items: center; */
}


li:nth-child(1){
  max-height: 35px;
  
}

li {
  float: right;
  /* justify-self: flex-end; */
}

li a {
  display: block;
  color: rgb(78, 78, 78);
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover:not(.active) {
  cursor: pointer;
}


iframe {
    width: 100%; 
    height: 100%;
    flex-grow: 1 1 auto;
    border: none;
    overflow: hidden;
}