/* Beginner introductions share the portal's restrained neo-brutalist style. */
.intro-entry-icon { background: var(--paper); }
.intro-entry-icon img { width: 30px; height: 30px; object-fit: contain; }
.intro-entry > svg { width: 18px; color: var(--muted); }
body[data-view="introduction"] .site-layout { max-width: 960px; padding: 24px 28px 28px; }
body[data-view="introduction"] main { padding-top: 0; }
.service-introduction { max-width: 820px; margin: 0 auto; }
.service-introduction h1, .service-introduction h2 { overflow-wrap: anywhere; letter-spacing: -.5px; }
.service-introduction h2 { margin: 0 0 14px; font-size: 18px; line-height: 1.5; }
.intro-hero { display: grid; grid-template-columns: 58px minmax(0, 1fr); align-items: center; gap: 10px 15px; margin: 4px 0 26px; }
.intro-brand { width: 58px; height: 58px; padding: 10px; border: 2px solid var(--line); border-radius: 10px; background: var(--paper); box-shadow: var(--shadow); object-fit: contain; }
.intro-hero h1 { margin: 0; font-size: 28px; font-weight: 750; line-height: 1.4; }
.intro-pronunciation { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
.intro-definition { grid-column: 1 / -1; max-width: 68ch; margin: 8px 0 0; color: var(--text); font-size: 16px; line-height: 1.85; }
.intro-analogy { padding: 19px 22px; border: 2px solid var(--line); border-radius: 8px; background: #fff9e7; }
.intro-analogy h2 { margin-bottom: 6px; font-size: 17px; }
.intro-analogy p { max-width: 70ch; margin: 0; color: var(--text); line-height: 1.85; }
.intro-role-section, .intro-abilities, .intro-more, .intro-comparison { margin-top: 32px; }
.intro-section-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.intro-section-heading h2 { margin: 0; }
.intro-mode { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.intro-mode button { min-height: 44px; padding: 8px 12px; border: 1px solid transparent; border-radius: 5px; background: transparent; color: var(--text); font-size: 12px; font-weight: 650; }
.intro-mode button:hover { background: var(--blue-soft); }
.intro-mode button[aria-pressed="true"] { border-color: var(--line); background: var(--blue); color: #fff; }
.intro-mode button:focus-visible { position: relative; outline-offset: 1px; }
.intro-role-flow { display: grid; grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1.5fr); align-items: center; gap: 12px; padding: 20px; border: 2px solid var(--line); border-radius: 10px; background: var(--paper); }
.intro-role-flow.is-saving { grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1.25fr) 24px minmax(0, 1.25fr); gap: 10px; }
.intro-flow-node { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 6px; align-self: stretch; min-width: 0; min-height: 112px; padding: 12px 9px; border: 1px solid var(--line-soft); border-radius: 7px; text-align: center; }
.intro-flow-node.is-highlighted { border: 2px solid var(--blue); background: var(--blue-soft); }
.intro-flow-node strong { max-width: 100%; font-size: 13px; line-height: 1.5; overflow-wrap: anywhere; }
.intro-flow-node > span { color: var(--muted); font-size: 12px; }
.intro-flow-node img { object-fit: contain; }
.intro-flow-arrow { display: grid; place-items: center; color: var(--muted); }
.intro-flow-caption { min-height: 24px; margin: 10px 0; color: var(--blue); font-size: 13px; font-weight: 650; line-height: 1.8; }
.intro-role-note { max-width: 72ch; margin: 0; color: var(--text); font-size: 13px; line-height: 1.85; }
.intro-small-note { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.intro-abilities dl { margin: 0; border-top: 1px solid var(--line-soft); }
.intro-abilities dl > div { display: grid; grid-template-columns: 170px minmax(0, 1fr); gap: 18px; padding: 15px 0; border-bottom: 1px solid var(--line-soft); }
.intro-abilities dt { font-weight: 700; }
.intro-abilities dd { margin: 0; color: var(--text); font-size: 13px; line-height: 1.85; }
.intro-disclosure { border-bottom: 1px solid var(--line-soft); }
.intro-disclosure:first-of-type { border-top: 1px solid var(--line-soft); }
.intro-disclosure summary { min-height: 52px; padding: 15px 6px; font-weight: 650; cursor: pointer; }
.intro-disclosure summary::marker { color: var(--blue); }
.intro-disclosure summary:hover { color: var(--blue); }
.intro-disclosure > p { max-width: 72ch; margin: 0 20px 18px; color: var(--text); font-size: 13px; line-height: 1.85; }
.intro-glossary { margin: 0 20px 18px; }
.intro-glossary > div + div { margin-top: 14px; }
.intro-glossary dt { font-size: 13px; font-weight: 700; }
.intro-glossary dd { margin: 4px 0 0; color: var(--text); font-size: 13px; line-height: 1.85; }
.intro-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); }
.intro-comparison table { width: 100%; border-collapse: collapse; text-align: left; font-size: 12px; }
.intro-comparison th, .intro-comparison td { padding: 8px 12px; border-bottom: 1px solid var(--line-soft); }
.intro-comparison thead th { background: #e3eaf5; font-weight: 700; }
.intro-comparison tbody tr:last-child > * { border-bottom: 0; }
.intro-comparison tbody th { width: 155px; }
.intro-comparison tbody td { color: var(--text); line-height: 1.8; }
.intro-comparison a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; max-width: 100%; white-space: nowrap; text-decoration: underline; text-underline-offset: 3px; }
.intro-comparison img { flex-shrink: 0; object-fit: contain; }
.intro-comparison .is-current { background: var(--blue-soft); }
.intro-footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 20px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line-soft); }
.intro-sources { display: flex; flex-wrap: wrap; gap: 0 15px; max-width: 100%; font-size: 12px; }
.intro-sources > span { flex-basis: 100%; color: var(--muted); }
.intro-sources a { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 680px) {
  body[data-view="introduction"] .site-layout { padding: 18px; }
  .intro-hero h1 { font-size: 23px; }
  .intro-definition { font-size: 15px; }
  .intro-abilities dl > div { grid-template-columns: 1fr; gap: 5px; }
  .intro-comparison th, .intro-comparison td { padding: 7px 9px; }
  .intro-comparison tbody th { width: auto; }
  .intro-comparison tbody th img { display: none; }
}
@media (max-width: 460px) {
  body[data-view="introduction"] .site-layout { padding: 16px; }
  .intro-hero { grid-template-columns: 44px minmax(0, 1fr); column-gap: 11px; }
  .intro-brand { width: 44px; height: 44px; padding: 7px; border-radius: 8px; }
  .intro-hero h1 { font-size: 21px; }
  .intro-analogy { padding: 16px; }
  .intro-role-flow, .intro-role-flow.is-saving { grid-template-columns: 1fr; gap: 8px; padding: 14px; }
  .intro-flow-node { min-height: 0; padding: 11px; }
  .intro-flow-arrow { height: 20px; }
  .intro-flow-arrow svg { rotate: 90deg; }
  .intro-comparison table { font-size: 11px; }
  .intro-comparison th, .intro-comparison td { padding: 7px; overflow-wrap: anywhere; }
  .intro-comparison thead th { font-size: 11px; }
  .intro-sources { column-gap: 12px; }
}