body {
  margin: 0;
  font-family: sans-serif;
  background: #f8f8f8;
}
header nav {
  display: flex;
  justify-content: flex-end;
  background: #333;
  padding: 0.5rem 1rem;
}
header nav a {
  color: #ddd;
  text-decoration: none;
  margin-left: 1rem;
}
header nav a.active {
  color: #fff;
  font-weight: bold;
}
main {
  padding: 1rem;
}
.figma-embed {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  height: 0;
}
.figma-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(0,0,0,0.1);
}