.article p { text-indent: 3em; text-align: justify; font-weight: normal }
.article h3 { text-align: center }

/* Override global 720px body cap so the side nav doesn't squeeze the article. */
body:has(.nbf-wrap) { max-width: 1000px; }

/* ── Flex layout ───────────────────────────────── */
.nbf-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.nbf-nav {
  width: 210px;
  flex-shrink: 0;
  border-right: 1px solid #000;
  padding: 0 8px 8px 0;
  font-size: 0.9em;
}

.nbf-content {
  flex: 1;
  min-width: 0;
  padding: 0 0 8px 12px;
}

.nbf-nav-toggle {
  display: none;
}

/* ── Mobile ────────────────────────────────────── */
@media (max-width: 680px) {
  .nbf-wrap {
    flex-direction: column;
  }
  .nbf-nav {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #ccc;
    padding: 0 0 8px 0;
    margin-bottom: 8px;
  }
  .nbf-content {
    width: 100%;
    padding: 0 0 8px 0;
  }
  .nbf-nav-toggle {
    display: block;
    width: 100%;
    background: #003D84;
    color: #fff;
    border: none;
    padding: 8px 12px;
    font-size: 1em;
    text-align: left;
    cursor: pointer;
    margin-bottom: 4px;
  }
  .nbf-nav-inner {
    display: none;
  }
  .nbf-nav.open .nbf-nav-inner {
    display: block;
  }
}