.ia-intro { padding-top: 56px; padding-bottom: 40px; }
.ia-intro h1 { font-size: clamp(38px, 4.8vw, 64px); line-height: 1.08; letter-spacing: -.045em; margin: 20px 0 24px; font-weight: 550; }
.ia-intro .ia-lead { color: var(--ink); font-size: 24px; letter-spacing: -.02em; margin-bottom: 16px; }
.ia-description { max-width: 680px; color: var(--muted); line-height: 1.7; }
.ia-version-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.ia-version-nav a { display: inline-flex; align-items: center; gap: 12px; padding: 10px 16px; min-height: 44px; border: 1px solid var(--border); border-radius: 8px; color: var(--ink); }
.ia-version-nav a:hover { background: var(--soft); }
.ia-nav-current { font-size: 12px; color: var(--teal); }
.ia-map { padding-top: 0; padding-bottom: 64px; }
.ia-root { position: relative; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); padding: 24px 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.ia-root h2 { font-size: 28px; letter-spacing: -.03em; margin: 8px 0; font-weight: 550; }
.ia-root p { color: var(--muted); font-size: 14px; }
.ia-root p a { color: var(--teal); text-decoration: underline; text-underline-offset: 3px; }
.ia-root > .button { white-space: nowrap; }
.ia-root::after { content: ""; position: absolute; top: 100%; left: 50%; height: 32px; border-left: 1px solid var(--border); }
.ia-versions { position: relative; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin-top: 64px; align-items: start; }
.ia-versions::before { content: ""; position: absolute; top: -32px; left: 10%; right: 10%; border-top: 1px solid var(--border); }
.ia-version { position: relative; min-width: 0; padding: 24px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; scroll-margin-top: 32px; }
.ia-version::before { content: ""; position: absolute; bottom: 100%; left: 50%; height: 32px; border-left: 1px solid var(--border); }
.ia-current { border-color: var(--teal); box-shadow: 0 6px 20px rgba(33,26,18,.035); }
.ia-version-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.ia-version-top h2 { margin: 0; font-size: 28px; font-weight: 550; letter-spacing: -.035em; }
.ia-status { color: var(--muted); font-size: 11px; border-bottom: 1px solid var(--border); padding: 3px 0; }
.ia-current .ia-status { color: var(--teal); border-color: var(--teal); }
.ia-version .ia-version-description { font-size: 13px; line-height: 1.5; color: var(--muted); min-height: 40px; margin: 12px 0 24px; }
.ia-tree { list-style: none; margin: 0; padding: 0 0 0 10px; border-left: 1px solid var(--border); }
.ia-tree > li { position: relative; padding: 0 0 12px 0; }
.ia-tree > li:last-child { padding-bottom: 0; }
.ia-tree > li::before { content: ""; position: absolute; width: 10px; top: 21px; right: 100%; border-top: 1px solid var(--border); }
.ia-node { position: relative; display: flex; flex-direction: column; gap: 3px; padding: 10px 12px 10px 8px; min-height: 44px; border-radius: 6px; font-size: 13px; color: var(--ink); line-height: 1.4; }
a.ia-node { padding-right: 18px; }
a.ia-node:hover { background: var(--soft); color: var(--teal); }
.ia-node code { font-family: inherit; font-size: 11px; color: var(--muted); overflow-wrap: anywhere; }
.ia-arrow { position: absolute; right: 0; top: 10px; font-size: 14px; color: var(--teal); }
.ia-family { color: var(--muted); padding-bottom: 4px; }
.ia-family-label { font-size: 10px; color: var(--teal); margin-top: 3px; }
.ia-group { color: var(--muted); }
.ia-node + .ia-tree { margin: 8px 0 4px 8px; }
.ia-shared-note { margin-top: 24px; border-top: 1px solid var(--border); padding-top: 16px; font-size: 12px; line-height: 1.5; }
.ia-shared-note p { color: var(--muted); margin-bottom: 12px; }
.ia-shared-note a { display: flex; align-items: center; min-height: 44px; color: var(--teal); }
.ia-utilities { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; border-top: 1px solid var(--border); padding-top: 48px; padding-bottom: 48px; }
.ia-utilities h2 { font-size: 32px; letter-spacing: -.035em; font-weight: 550; margin: 12px 0 16px; }
.ia-utilities p { max-width: 420px; color: var(--muted); }
.ia-utilities ul { margin: 0; padding: 0; list-style: none; }
.ia-utilities li + li { border-top: 1px solid var(--border); }
.ia-utilities li a { display: grid; grid-template-columns: 1fr auto 20px; align-items: center; gap: 16px; padding: 20px 0; font-size: 16px; }
.ia-utilities code { font-size: 13px; color: var(--muted); }
.ia-utilities a:hover { color: var(--teal); }
.ia-explainer { display: flex; align-items: baseline; gap: 12px; padding-bottom: 80px; }
.ia-explainer p { color: var(--muted); font-size: 13px; max-width: 760px; }
.ia-live-dot { width: 7px; height: 7px; flex-shrink: 0; border-radius: 50%; background: var(--teal); }
@media (max-width: 1150px) {
  .ia-versions { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 48px; }
  .ia-versions::before, .ia-version::before { display: none; }
  .ia-root::after { height: 48px; }
  .ia-version { padding: 24px; }
  .ia-version .ia-version-description { min-height: 0; }
}
@media (max-width: 700px) {
  .ia-intro { padding-top: 56px; padding-bottom: 40px; }
  .ia-intro h1 { font-size: 42px; max-width: 100%; overflow-wrap: anywhere; }
  .ia-intro .ia-lead { font-size: 21px; }
  .ia-description { font-size: 16px; }
  .ia-version-nav { gap: 8px; margin-top: 24px; }
  .ia-version-nav a { padding: 10px 14px; gap: 8px; }
  .ia-root { padding: 24px; align-items: flex-start; flex-direction: column; }
  .ia-root h2 { font-size: 26px; }
  .ia-root::after { left: 24px; }
  .ia-versions { display: flex; flex-direction: column; border-left: 1px solid var(--border); margin-left: 24px; padding-left: 20px; gap: 24px; }
  .ia-version { width: 100%; padding: 24px 20px; }
  .ia-version::before { display: block; top: 36px; left: -21px; height: 0; width: 20px; border-left: 0; border-top: 1px solid var(--border); }
  .ia-tree { padding-left: 16px; }
  .ia-node { font-size: 15px; padding-top: 12px; padding-bottom: 12px; }
  .ia-node code { font-size: 12px; }
  .ia-map { padding-bottom: 48px; }
  .ia-utilities { grid-template-columns: 1fr; gap: 24px; padding-top: 40px; }
  .ia-explainer { padding-bottom: 64px; }
}