body {
  font-family: "Amazon Ember", "Segoe UI", Roboto, Arial, sans-serif;
  background: #f3f6fa;
  color: #1b1f23;
  margin: 0;
  padding: 2rem;
}

.markdown-body {
  max-width: 960px;
  margin: auto;
  padding: 2.5rem;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  border: 1px solid #e1e4e8;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  color: #232f3e;
  margin-top: 2rem;
  font-weight: 600;
}

.markdown-body h1 {
  font-size: 2rem;
  border-bottom: 2px solid #d0d7de;
  padding-bottom: 0.5rem;
}

.markdown-body h2 {
  font-size: 1.5rem;
  border-left: 5px solid #005eb8;
  padding-left: 0.75rem;
  background-color: #f1f8ff;
}

.markdown-body p {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.markdown-body ul {
  padding-left: 1.5rem;
}

.markdown-body li {
  margin-bottom: 0.5rem;
}

/* Terminal-style blocks */
pre, code {
  background-color: #303031;
  color: #ffffff;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.95em;
  border-radius: 6px;
}

code {
  padding: 0.3em 0.5em;
  white-space: pre-wrap;
}

pre {
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

/* Callouts */
.markdown-body .callout {
  border-left: 5px solid #0366d6;
  background-color: #f1f8ff;
  padding: 1rem;
  border-radius: 6px;
  margin: 1.5rem 0;
}

.markdown-body .callout.warning {
  border-color: #d73a49;
  background-color: #ffeef0;
}

.markdown-body .callout.success {
  border-color: #28a745;
  background-color: #e6ffed;
}

.markdown-body a {
  color: #0366d6;
  font-weight: 500;
}

.markdown-body a:hover {
  text-decoration: underline;
}

.accordion {
  background-color: #6f42c1;
  color: white;
  cursor: pointer;
  padding: 12px 18px;
  width: 100%;
  text-align: left;
  border: none;
  border-radius: 6px;
  outline: none;
  font-size: 1.1rem;
  margin-top: 1rem;
}

.accordion:hover {
  background-color: #5936a3;
}

.panel {
  display: none;
  flex-direction: column;
  gap: 10px;
  padding: 10px 0;
}

.lab-item {
  background: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  border: 1px solid #e0e0e0;
  text-decoration: none;
  color: #333;
  display: flex;
  align-items: center;
  gap: 12px;
}

.lab-item:hover {
  background-color: #f4f0ff;
}

.lab-category-title {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  color: #6f42c1;
  border-left: 6px solid #6f42c1;
  padding-left: 12px;
}

.lab-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 1rem;
}

.lab-number {
  font-weight: bold;
  color: #6f42c1;
  margin-right: 12px;
}