body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(180deg, #2b2b2b, #1c1c1c);
}

.container {
  display: flex;
}

.toc {
  width: 260px;
  background: #111;
  color: #fff;
  padding: 25px;
  height: 100vh;
}

.toc h2 {
  color: #ffcc00;
}

.toc ul {
  list-style: none;
  padding: 0;
}

.toc li {
  margin: 10px 0;
}

.toc a {
  color: #ddd;
  text-decoration: none;
}

.content {
  background: #ffffff;
  padding: 40px;
  flex: 1;
}

section h2 {
  border-bottom: 2px solid #ffcc00;
  padding-bottom: 6px;
}

footer {
  margin-top: 50px;
  padding-top: 20px;
  border-top: 1px solid #ccc;
}