body {
  margin:0;
  font-family:Arial, sans-serif;
  background:#f6f8fb;
  color:#333;
}

.topbar {
  background:#1f2937;
  color:#fff;
  padding:30px 20px;
  text-align:center;
}

.subtitle {
  opacity:.8;
}

.layout {
  display:flex;
}

.sidebar {
  width:240px;
  background:#111827;
  color:#fff;
  min-height:100vh;
  position:sticky;
  top:0;
}

.sidebar nav a {
  display:block;
  padding:10px 20px;
  color:#9ca3af;
  text-decoration:none;
}

.sidebar nav a:hover {
  background:#1f2937;
  color:#fff;
}

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

section {
  margin-bottom:60px;
}

.callout {
  background:#eef2ff;
  padding:15px;
  border-left:4px solid #6366f1;
}

.warning {
  background:#fff7ed;
  border-color:#f59e0b;
}

img {
  width:100%;
  max-width:900px;
  border-radius:8px;
  margin-top:15px;
}

pre {
  background:#111827;
  color:#e5e7eb;
  padding:15px;
  border-radius:6px;
}

.faq-question {
  width:100%;
  padding:15px;
  background:#e5e7eb;
  border:none;
  cursor:pointer;
  text-align:left;
}

.faq-answer {
  display:none;
  padding:15px;
  background:#f9fafb;
}