/* ===== AI and Research Practice hub (/ai) =====
   Light only. Palette and type from style.css. Ported from the approved
   mockup docs/superpowers/drafts/2026-09-22-ai-hub-demo-mockup.html. */

.ai-page { --tint: rgba(24, 69, 59, 0.12); --soft: #8ba896; --grey: #999; --grey-dark: #555; }

/* ---- Layout ---- */
.ai-layout { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 56px; padding: 0 2rem; width: 100%; flex: 1; }
.ai-layout--wide { grid-template-columns: 56px minmax(0, 1fr); gap: 24px; }
html:not(.js) .ai-layout--wide { grid-template-columns: 250px minmax(0, 1fr); gap: 56px; }
.ai-side { position: sticky; top: 0; align-self: start; max-height: 100vh; overflow-y: auto; }
main.ai-main { max-width: 740px; margin: 0; padding: 40px 0 90px; min-width: 0; width: 100%; }
.ai-layout--wide main.ai-main { max-width: none; }
.ai-main h2[id], .ai-main h3[id] { scroll-margin-top: 24px; }

/* ---- Sidebar ---- */
.ai-toc { padding: 32px 20px 32px 0; border-right: 1px solid var(--border); font-family: "Metropolis", "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 13.5px; line-height: 1.4; }
.ai-toc ul { list-style: none; padding: 0; }
.ai-toc a { display: block; color: var(--text-light); padding: 5px 10px; border-radius: 3px; text-decoration: none; }
.ai-toc a:hover { color: var(--accent); text-decoration: none; }
.ai-toc .ai-toc-title { font-family: Garamond, "EB Garamond", Georgia, serif; font-size: 1.4rem; line-height: 1.15; font-weight: bold; color: var(--accent); padding: 0 0 12px; margin-bottom: 14px; border-bottom: 1px solid var(--border); border-radius: 0; }
.ai-toc .sec > a { color: var(--accent); font-weight: bold; }
.ai-toc ul ul { margin: 2px 0 8px 10px; border-left: 1px solid var(--border); }
.ai-toc ul ul a { padding: 4px 10px; }
.ai-toc a.h3 { padding-left: 22px; font-size: 12.5px; }
.ai-toc .grp { font-size: 11px; color: var(--grey); padding: 10px 10px 2px; }
.ai-toc a.here { background: var(--tint); color: var(--accent); font-weight: bold; }
.ai-toc-toggle { display: none; font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 13px; font-weight: bold; color: var(--accent); background: none; border: 1px solid var(--accent); border-radius: 3px; padding: 6px 12px; cursor: pointer; }

/* Wide pages (policies): the sidebar collapses to a slim bar */
.ai-layout--wide .ai-side { overflow: visible; z-index: 40; }
.ai-layout--wide .ai-toc { padding: 32px 0; border-right: 1px solid var(--border); }
.js .ai-layout--wide .ai-toc-list, .js .ai-layout--wide .ai-toc-title { display: none; }
.js .ai-layout--wide .ai-toc-toggle { display: block; writing-mode: vertical-rl; margin: 0 auto; }
.ai-layout--wide .ai-toc.is-open { position: absolute; z-index: 20; background: var(--bg); width: 250px; padding: 24px 20px; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12); }
.ai-layout--wide .ai-toc.is-open .ai-toc-list, .ai-layout--wide .ai-toc.is-open .ai-toc-title { display: block; }
.ai-layout--wide .ai-toc.is-open .ai-toc-toggle { writing-mode: horizontal-tb; margin: 0 0 12px; }

/* ---- Type ---- */
.ai-main { font-size: 1rem; line-height: 1.7; }
.ai-main h1 { font-size: 2rem; font-weight: bold; color: var(--accent); line-height: 1.15; margin: 8px 0 12px; }
.ai-main h2 { font-size: 1.5rem; margin: 44px 0 16px; }
.ai-main h3 { font-size: 1.25rem; font-weight: bold; color: var(--accent); margin: 36px 0 8px; }
.ai-main ul.plain { list-style: disc; padding-left: 1.4rem; margin-bottom: 1rem; }
.ai-main ul.plain li { margin-bottom: 0.4rem; }
.crumb { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 12.5px; color: var(--text-light); }
.lede { font-size: 1.12rem; line-height: 1.5; margin-bottom: 30px; }
.claim { font-size: 1.05rem; line-height: 1.5; font-weight: normal; font-style: italic; color: var(--text-light); }
.ai-status { display: inline-block; font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 11.5px; font-weight: bold; color: var(--accent); background: var(--tint); padding: 2px 10px; border-radius: 3px; }
.ai-verified, .limits, .setup, .muted { color: var(--text-light); }
.ai-verified { font-size: 0.85rem; margin-top: 18px; }
.setup { font-size: 0.9rem; margin-top: 8px; }
.asked { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 11px; color: var(--accent); background: var(--tint); padding: 1px 8px; border-radius: 3px; margin-left: 6px; vertical-align: 2px; }
.ai-main details { margin: 14px 0; padding: 0 0 0 14px; border: 0; border-left: 2px solid var(--border); }
.ai-main details summary { cursor: pointer; font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 13px; font-weight: bold; color: var(--accent); list-style: none; }
.ai-main details summary::-webkit-details-marker { display: none; }
.ai-main details summary::before { content: "+ "; }
.ai-main details[open] summary::before { content: "\2212  "; }
.ai-main details summary:focus { outline: none; }
.ai-main details summary:focus-visible { outline: 2px solid var(--accent-hover); outline-offset: 2px; }
.ai-main details[open] summary { margin-bottom: 8px; }

/* ---- Blocks ---- */
.principle { background: var(--tint); padding: 14px 20px; border-radius: 3px; margin: 6px 0 1rem; }
.principle p { margin-bottom: 0.5rem; }
.principle p:last-child { margin-bottom: 0; }
.principle b { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 11.5px; letter-spacing: 0.02em; color: var(--accent); display: block; }
.prompt { background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--accent); padding: 20px 24px; font-size: 1.25rem; line-height: 1.35; }
.blank { display: inline-block; min-width: 120px; border-bottom: 3px solid var(--accent-hover); }
.hub-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 10px 0 20px; }
.hub-card { display: block; background: #fff; border: 1px solid var(--border); border-radius: 4px; padding: 16px 18px; color: var(--text); }
.hub-card:hover { border-color: var(--accent); text-decoration: none; color: var(--text); }
.hub-card h3 { margin: 0 0 4px; }
.hub-card p { margin: 0; font-size: 0.95rem; color: var(--text-light); }
.sessions { list-style: none; padding: 0; margin: 0 0 1rem; }
.sessions li { display: grid; grid-template-columns: 150px 1fr; gap: 14px; padding: 8px 0; border-bottom: 1px solid var(--border); }
.sessions .when { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 13px; color: var(--text-light); padding-top: 3px; }
.video { position: relative; padding-top: 56.25%; margin-bottom: 20px; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.cite { font-size: 0.9rem; color: var(--text-light); border-top: 1px solid var(--border); margin-top: 40px; padding-top: 12px; }
.readings { list-style: none; padding: 0; }
.readings li { margin-bottom: 14px; }
.readings .why { display: block; color: var(--text-light); font-size: 0.95rem; }

/* ---- Demo figures ---- */
.ai-fig, .numline { background: #fff; border: 1px solid var(--border); padding: 24px 26px 20px; overflow-x: auto; }
.fig-cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
.ai-fig h4 { font-family: Garamond, "EB Garamond", Georgia, serif; font-size: 1rem; font-weight: bold; margin: 0; }
.ai-fig .ai-sub { font-size: 0.9rem; color: var(--text-light); margin-bottom: 14px; line-height: 1.35; }
.bar-row { display: grid; grid-template-columns: 128px 1fr 44px; align-items: center; gap: 10px; font-size: 0.95rem; margin: 3px 0; }
.bar-row .w { text-align: right; font-size: 0.9rem; }
.bar { height: 14px; background: var(--accent); border-radius: 2px; }
.bar.dim { background: var(--soft); }
.bar-row .ai-n { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 12px; color: var(--text-light); }
.dots { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 5px; }
.ai-dot { font-size: 0.75rem; text-align: center; padding: 6px 2px; border-radius: 3px; background: var(--accent); color: #fff; line-height: 1.2; }
.ai-dot.alt { background: var(--tint); color: var(--accent); }
.fig-foot { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 11.5px; color: var(--text-light); border-top: 1px solid var(--border); margin-top: 20px; padding-top: 10px; }
.notice { counter-reset: n; list-style: none; padding: 0; }
.notice li { position: relative; padding-left: 42px; margin-bottom: 14px; }
.notice li::before { counter-increment: n; content: counter(n); position: absolute; left: 0; top: 3px; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); font: bold 13px/24px "Metropolis", Arial, sans-serif; text-align: center; }
.runlink { margin-top: 30px; padding-top: 14px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.convo { display: grid; gap: 12px; }
.turn { display: grid; grid-template-columns: 90px 1fr; gap: 16px; align-items: start; }
.who { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 12px; color: var(--text-light); padding-top: 12px; text-align: right; }
.bubble { background: #fff; border: 1px solid var(--border); padding: 10px 18px; border-radius: 6px; overflow-wrap: anywhere; }
.bubble.you { background: var(--tint); border-color: transparent; }
.bubble .tally { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 12px; color: var(--text-light); display: block; margin-top: 2px; }
.big { font-size: 1.4rem; font-weight: bold; color: var(--grey-dark); }
.nl { position: relative; height: 200px; margin: 10px 20px 0; min-width: 420px; }
.axis { position: absolute; left: 0; right: 0; top: 150px; border-top: 1px solid var(--grey); }
.tick { position: absolute; top: 150px; transform: translateX(-50%); font-family: "Metropolis", Arial, sans-serif; font-size: 12px; color: var(--text-light); padding-top: 8px; }
.tick::before { content: ""; position: absolute; left: 50%; top: -5px; height: 9px; border-left: 1px solid var(--grey); }
.truth { position: absolute; top: 0; bottom: 42px; border-left: 2px dashed var(--accent-hover); }
.truth span { position: absolute; top: -4px; left: 8px; white-space: nowrap; font-family: "Metropolis", Arial, sans-serif; font-size: 12px; font-weight: bold; color: var(--accent-hover); }
.stack { position: absolute; transform: translateX(-50%); bottom: 54px; display: flex; flex-direction: column-reverse; gap: 2px; align-items: center; }
.stack i { width: 11px; height: 5px; border-radius: 1px; display: block; }
.stack.s0 i { background: #b0b0b0; }
.stack.s1 i { background: var(--grey-dark); }
.stack label { font-family: "Metropolis", Arial, sans-serif; font-size: 11.5px; white-space: nowrap; margin-top: 4px; order: -1; color: var(--text-light); }
.ai-legend { display: flex; gap: 22px; font-family: "Metropolis", Arial, sans-serif; font-size: 12px; color: var(--text-light); margin-top: 8px; flex-wrap: wrap; }
.ai-legend i { display: inline-block; width: 12px; height: 12px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
.demo-list { list-style: none; padding: 0; }
.demo-list li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.demo-list .result { display: block; color: var(--text-light); font-size: 0.95rem; }

/* ---- Phone ---- */
@media (max-width: 860px) {
  .ai-layout, .ai-layout--wide { grid-template-columns: 1fr; gap: 0; padding: 0 16px; }
  .ai-side { position: static; max-height: none; border-bottom: 1px solid var(--border); }
  .js .ai-side { position: sticky; top: 0; z-index: 5; background: var(--bg); }
  .ai-toc, .ai-layout--wide .ai-toc { border-right: 0; padding: 10px 0; }
  /* Without JavaScript the list simply shows. With it, it folds behind the Contents button. */
  .ai-toc-toggle, .ai-layout--wide .ai-toc-toggle { display: none; }
  .js .ai-toc-toggle, .js .ai-layout--wide .ai-toc-toggle { display: block; writing-mode: horizontal-tb; margin: 0; }
  .ai-layout--wide .ai-toc-list, .ai-layout--wide .ai-toc-title { display: block; }
  .js .ai-toc-list, .js .ai-toc .ai-toc-title { display: none; }
  .ai-toc.is-open .ai-toc-list, .ai-layout--wide .ai-toc.is-open .ai-toc-list { display: block; max-height: 70vh; overflow-y: auto; margin-top: 10px; }
  .ai-layout--wide .ai-toc.is-open { position: static; width: auto; box-shadow: none; padding: 10px 0; }
  main.ai-main { padding-top: 24px; }
  .ai-main h2[id], .ai-main h3[id] { scroll-margin-top: 64px; }
  .fig-cols, .hub-cards { grid-template-columns: 1fr; }
  .turn { grid-template-columns: 1fr; gap: 2px; }
  .who { text-align: left; padding: 0; }
  .sessions li { grid-template-columns: 1fr; gap: 2px; }
  .ai-main h1 { font-size: 1.7rem; }
}
.ai-legend { display: flex; gap: 22px; font-family: "Metropolis", Arial, sans-serif; font-size: 12px; color: var(--text-light); margin-top: 8px; flex-wrap: wrap; }
.ai-legend i { display: inline-block; width: 12px; height: 12px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
.ai-legend i.k0 { background: #b0b0b0; }
.ai-legend i.k1 { background: var(--grey-dark); }
.ai-legend i.kt { border-left: 2px dashed var(--accent-hover); border-radius: 0; width: 0; }
.stat-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.stat-cols .big-n { font-size: 2rem; font-weight: bold; color: var(--accent); line-height: 1.1; }
.stat-cols .big-n.grey { color: var(--grey-dark); }
@media (max-width: 860px) { .stat-cols { grid-template-columns: 1fr; } }
.methods { width: 100%; border-collapse: collapse; font-size: 0.95rem; margin-bottom: 1rem; }
.methods th, .methods td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px solid var(--border); vertical-align: top; }
.methods th { font-family: "Metropolis", "Helvetica Neue", Arial, sans-serif; font-size: 12px; color: var(--text-light); }
.table-wrap { overflow-x: auto; margin-bottom: 1rem; }
.methods td { overflow-wrap: anywhere; }
/* Questions: each one opens on click */
.ai-main details.qa { border: 0; border-bottom: 1px solid var(--border); margin: 0; padding: 10px 0; }
.ai-main details.qa summary { font-family: Garamond, "EB Garamond", Georgia, serif; font-size: 1.08rem; font-weight: bold; color: var(--accent); display: flex; gap: 10px; align-items: baseline; }
.ai-main details.qa summary::before { content: "+"; font-family: "Metropolis", Arial, sans-serif; font-size: 14px; width: 12px; flex: 0 0 12px; }
.ai-main details.qa[open] summary::before { content: "\2212"; }
.ai-main details.qa[open] summary { margin-bottom: 6px; }
.ai-main details.qa p { margin: 0 0 6px 22px; }
.bar-row.idea, .bar-row.idea-head { grid-template-columns: 150px 1fr 60px; }
.idea-bar { display: flex; align-items: center; gap: 8px; }
.idea-bar .bar { display: block; height: 14px; }
.idea-head .ai-n { font-size: 11px; }
.model-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.model-cols p { margin-bottom: 0.4rem; }
.ai-main ol.plain-num { padding-left: 1.3rem; margin: 6px 0 0; }
@media (max-width: 860px) { .model-cols { grid-template-columns: 1fr; } }
.ai-img { margin: 16px 0 20px; }
.ai-img img { width: 100%; height: auto; display: block; border: 1px solid var(--border); border-radius: 4px; background: #fff; }
.ai-main h4[id] { font-size: 1.1rem; font-weight: bold; color: var(--accent); margin: 28px 0 6px; scroll-margin-top: 24px; }
.ai-toc a.h4 { padding-left: 34px; font-size: 12px; }
@media (max-width: 860px) { .ai-main h4[id] { scroll-margin-top: 64px; } }