.container {
  display: flex;
  height: 100vh;
}
#nav {
  width: 20%;
}
#thefullthing {
  width: 80%;
  border-left: 2px solid gray;
  padding: 8px 25px;
}
.subt {
  color: #555;
}
#conclusion {
  width: 100%;
  text-align: center;
  padding: 30px;
}

body {
  background-color: lemonchiffon;
}

img {
  width: 300px;
}