* { box-sizing: border-box; margin: 0; padding: 0; }


body {
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  background: #f3f6fb;
  color: #222;
  padding: 18px;
}


.container {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 18px;
  max-width: 1200px;
  margin: 0 auto;
}


.toc {
  background: white;
  border-radius: 10px;
  padding: 14px;
  box-shadow: 0 6px 18px rgba(12,30,60,0.06);
  height: calc(100vh - 36px);
  position: sticky;
  top: 18px;
  overflow: auto;
}

.toc h3 { color: #0b63a8; margin-bottom: 8px; }
.toc ul { list-style: none; }
.toc li + li { margin-top: 8px; }
.toc a {
  text-decoration: none;
  color: #0b63a8;
  font-size: 0.95rem;
}
.toc a:hover { text-decoration: underline; }

.notes {
  background: white;
  border-radius: 10px;
  padding: 22px;
  box-shadow: 0 6px 18px rgba(12,30,60,0.06);
}


.page-header h1 { color: #083c6b; margin-bottom: 6px; }
.page-header p { color: #4a5969; margin-bottom: 18px; }


section { margin-bottom: 22px; }
section h2 { color: #0b63a8; margin-bottom: 8px; font-size: 1.25rem; }
section h3 { margin-top: 10px; margin-bottom: 8px; color: #065a9c; font-size: 1rem; }


pre {
  background: #f6f8fb;
  border-radius: 6px;
  padding: 12px;
  overflow-x: auto;
  margin: 10px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.4;
}


ul, ol { margin-left: 18px; margin-top: 8px; }
li { margin-bottom: 6px; }


.notes-footer {
  border-top: 1px dashed #e1e8f0;
  padding-top: 12px;
  margin-top: 12px;
  color: #455a6f;
}