body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: #0d1b2a;
  color: #e0e0e0;
}

header {
  background: rgba(10, 20, 40, 0.8);
  padding: 15px;
  color: #4fc3f7;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid #4fc3f7;
}

.back-btn {
  position: absolute;
  left: 20px;
  color: #4fc3f7;
  text-decoration: none;
  font-size: 1.2em;
}

.wiki-container {
  display: flex;
  height: calc(100vh - 70px);
}

.wiki-sidebar {
  width: 220px;
  background: rgba(20, 30, 50, 0.9);
  border-right: 1px solid #4fc3f7;
  padding: 20px;
}

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

.wiki-sidebar li {
  padding: 10px;
  cursor: pointer;
  border-radius: 5px;
  transition: 0.2s;
}

.wiki-sidebar li:hover {
  background: rgba(79, 195, 247, 0.2);
}

.wiki-content {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
}

h2 {
  color: #4fc3f7;
}