body {
  font-family: system-ui, sans-serif;
  line-height: 1.5;
  margin: 2rem auto;
  max-width: 900px;
  padding: 0 1rem;
}
ul {
  list-style: none;
  padding: 0;
}
li {
  margin: 6px 0;
}
a {
  text-decoration: none;
  color: #0366d6;
}
a:hover {
  text-decoration: underline;
}
.primary-callout {
  background: #f1f8ff;
  border-left: 4px solid #0366d6;
  padding: 12px;
  margin: 1rem 0;
}
.extension-description {
  margin: 4px 0 0;
  color: #586069;
  font-size: 0.9rem;
}
.secondary-callout {
  margin-top: 2rem;
}

#extension-filters-fieldset {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border: 1px solid #d0d7de;
  border-radius: 6px;
}
#extension-filters-fieldset legend {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0 6px;
}
.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 0.5rem;
  align-items: center;
}
.filter-option {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.95rem;
  white-space: nowrap;
}
.filter-option input {
  width: 16px;
  height: 16px;
}

.bitfield-diagram {
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 0.75rem;
  margin-top: 0.5rem;
  background: #fafafa;
}
.bits {
  margin-top: 0.5rem;
  color: #333;
}

svg text {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

small {
  color: #555;
  margin-left: 8px;
}
.base-width {
  display: inline-block;
  color: white;
  background: #6699d6;
  border-radius: 6px;
  font-size: 80%;
  font-weight: bold;
  padding: 1px 3px;
  margin-left: 3px;
}