header {
  background-color: #000000;
  color: #fff;
  padding: 20px;
  height: 80px;
}

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
}

nav li {
  margin: 0 10px;
  border: none;
}

nav a,
nav button {
  color: #fff;
  text-decoration: none;
  border: none;
  font-weight: bold;
  font-family: "Arial", sans-serif;
}

nav button {
  background-color: transparent;
}

nav button.active,
nav a.active {
  color: #a35cd4;
}

main {
  display: flex;
  margin: 0 auto;
}

iframe {
  margin-bottom: 20px;
  width: 100%;
  height: calc(100vh - 120px);
  border: none;
}

iframe h1 {
  margin-top: 0;
}

#home-iframe {
  display: block;
}