:root {
  --bg-color: #1e1e1e;
  --card-color: #2b2b2b;
  --accent: #3c9cff;
  --text-color: #f0f0f0;
  --subtle-text: #bbb;
  --border: #444;
  --code-bg: #2d2d2d;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: 'Segoe UI', sans-serif;
  padding: 2rem;
  margin: 0;
}

h1 {
  text-align: center;
  margin-bottom: 2rem;
}

.scenario {
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--card-color);
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}

.toggle {
  width: 100%;
  padding: 1rem;
  font-size: 1.1rem;
  background: none;
  color: var(--text-color);
  border: none;
  text-align: left;
  cursor: pointer;
  outline: none;
  border-bottom: 1px solid var(--border);
  background-color: #333;
  transition: background-color 0.3s ease;
}

.toggle:hover {
  background-color: #444;
}

.toggle.nested {
  font-size: 1rem;
  background-color: #2a2a2a;
  border-top: 1px solid var(--border);
}

.content,
.code-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.3s ease;
  padding: 0 1rem;
}

.content.open,
.code-content.open {
  max-height: 1000px; /* large enough to fit content */
  padding: 1rem;
}

.video-pair {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.video-pair video {
  width: 100%;
  max-width: 48%;
  border: 1px solid #666;
  border-radius: 4px;
}

pre {
  background-color: var(--code-bg);
  color: #f8f8f2;
  padding: 1rem;
  border-radius: 6px;
  overflow: auto;
  font-size: 0.9rem;
  max-height: 400px; /* Limit height so large code doesn’t overflow the page */
  line-height: 1.4;
  white-space: pre-wrap; /* Allows line wrapping if desired */
  word-break: break-word;
}