/* Shared reading layout for the six AI production lectures. */
.ai-production { --ai-accent: #355c82; --ai-soft: #e1e8ee; }
.ai-production [id] { scroll-margin-top: 96px; }
.ai-production :is(a, button, summary):focus-visible { outline: 3px solid var(--ai-accent); outline-offset: 4px; }
.ai-hero { background: var(--paper); border-bottom: 1px solid var(--line); }
.ai-hero-inner { width: min(1280px, calc(100% - 80px)); margin: auto; padding: 66px 0; display: grid; grid-template-columns: 1fr 1.1fr; gap: 52px; align-items: center; }
.ai-eyebrow, .ai-section-index { color: var(--ai-accent); font: 600 12px/1.6 var(--mono); letter-spacing: .06em; }
.ai-hero h1 { font-size: clamp(32px, 3.6vw, 54px); letter-spacing: -.055em; line-height: 1.2; word-break: keep-all; margin: 18px 0 22px; }
.ai-lead { color: var(--muted); font-size: 17px; line-height: 1.8; word-break: keep-all; }
.ai-hero-meta { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.ai-hero figure { margin: 0; min-width: 0; }
.ai-hero img { display: block; width: 100%; height: auto; border-radius: 4px; }
.ai-hero figcaption { margin-top: 12px; color: var(--muted); font-size: 12px; line-height: 1.7; }
.ai-layout { width: min(1180px, calc(100% - 80px)); margin: 0 auto; padding: 58px 0 100px; display: grid; grid-template-columns: minmax(0, 1fr) 210px; gap: 70px; align-items: start; }
.ai-article { min-width: 0; }
.ai-section { padding-bottom: 44px; margin-bottom: 44px; border-bottom: 1px solid var(--line); }
.ai-section h2 { margin: 10px 0 20px; font-size: clamp(23px, 2.4vw, 31px); line-height: 1.4; letter-spacing: -.04em; word-break: keep-all; }
.ai-section h3 { margin: 28px 0 12px; font-size: 19px; letter-spacing: -.025em; }
.ai-section p, .ai-section li { font-size: 16px; line-height: 1.9; word-break: keep-all; overflow-wrap: anywhere; }
.ai-section p { margin: 14px 0; }
.ai-section ul, .ai-section ol { padding-left: 23px; }
.ai-section li { margin: 10px 0; padding-left: 3px; }
.ai-section strong { color: var(--ink-strong); font-weight: 750; }
.ai-section code { font-family: var(--mono); font-size: .87em; overflow-wrap: anywhere; }
.ai-section mark { color: inherit; background: #f3e6ab; padding: .05em .12em; }
.ai-note { margin: 24px 0; padding: 18px 22px; border-left: 3px solid var(--ai-accent); background: var(--ai-soft); }
.ai-note p { margin: 0; font-size: 15px; }
.ai-flow { list-style: none; padding: 0 !important; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 28px 0; border-top: 1px solid var(--line-strong); }
.ai-flow li { margin: 0; padding: 18px 16px 10px 0; }
.ai-flow span { display: block; color: var(--ai-accent); font: 12px/1.5 var(--mono); margin-bottom: 7px; }
.ai-flow strong { display: block; font-size: 16px; }
.ai-flow p { font-size: 13px; line-height: 1.7; margin-top: 8px; }
.ai-table-wrap { width: 100%; overflow-x: auto; margin: 24px 0; }
.ai-table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.8; }
.ai-table caption { text-align: left; font-weight: 700; margin-bottom: 10px; }
.ai-table th, .ai-table td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 13px 15px; word-break: keep-all; overflow-wrap: anywhere; }
.ai-table th { background: var(--ai-soft); font-weight: 700; }
.ai-table td:first-child { min-width: 105px; font-weight: 650; }
.ai-prompt { margin: 24px 0; background: #20282d; color: #edf1f3; border-radius: 4px; overflow: hidden; }
.ai-prompt-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 18px; border-bottom: 1px solid #526069; }
.ai-prompt-bar span { color: #d1dce3; font-size: 12px; }
.ai-prompt button { color: #fff; background: transparent; border: 1px solid #8998a2; padding: 7px 12px; border-radius: 3px; font-size: 12px; cursor: pointer; min-height: 36px; }
.ai-prompt button:focus-visible { outline-color: #c1dff5; }
.ai-prompt pre { margin: 0; padding: 22px; white-space: pre-wrap; overflow-wrap: anywhere; font: 14px/1.9 var(--mono); color: inherit; background: transparent; }
.ai-section details { margin: 12px 0; border: 1px solid var(--line); border-radius: 3px; }
.ai-section summary { padding: 17px 20px; font-size: 15px; font-weight: 700; cursor: pointer; }
.ai-section .details-motion-content { padding: 0 20px 18px; }
.ai-section details p { font-size: 15px; }
.ai-toc { position: sticky; top: 100px; }
.ai-toc p { font: 12px/1.5 var(--mono); color: var(--ai-accent); margin: 0 0 18px; }
.ai-toc ol { list-style: none; padding: 0; margin: 0; }
.ai-toc a { display: block; padding: 10px 0 10px 12px; border-left: 2px solid var(--line); color: var(--muted); font-size: 13px; line-height: 1.5; }
.ai-toc a[aria-current="location"] { color: var(--ai-accent); border-color: var(--ai-accent); font-weight: 700; }
.ai-mobile-nav { display: none; }
.ai-bridge { display: flex; justify-content: space-between; gap: 24px; padding-top: 10px; font-size: 14px; line-height: 1.8; }
.ai-bridge span { display: block; color: var(--muted); font-size: 12px; }
.ai-project-notice { margin: 8px 0 4px; font-size: 12px; color: var(--muted); line-height: 1.8; padding: 8px 0; }
.ai-project-notice strong { font-weight: 650; }
.ai-archive { max-width: 760px; margin: 60px auto; padding: 0 24px; }
.ai-archive h1 { font-size: 32px; margin: 20px 0; line-height: 1.4; }
.ai-archive p { line-height: 1.9; }
@media (max-width: 1000px) {
  .ai-hero-inner { gap: 32px; width: calc(100% - 48px); }
  .ai-layout { width: calc(100% - 48px); grid-template-columns: minmax(0, 1fr) 170px; gap: 32px; }
}
@media (max-width: 760px) {
  .ai-hero-inner { grid-template-columns: 1fr; padding: 36px 0; gap: 26px; }
  .ai-hero h1 { max-width: 550px; font-size: 36px; }
  .ai-layout { display: block; padding-top: 28px; }
  .ai-toc { display: none; }
  .ai-mobile-nav { display: block; border-bottom: 1px solid var(--line); margin-bottom: 35px; padding-bottom: 15px; }
  .ai-mobile-nav summary { font-size: 14px; cursor: pointer; }
  .ai-mobile-nav ol { padding-left: 20px; }
  .ai-mobile-nav a { display: block; padding: 7px 0; font-size: 14px; }
  .ai-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ai-section { margin-bottom: 32px; padding-bottom: 30px; }
  .ai-table th, .ai-table td { padding: 10px 9px; }
  .ai-table { min-width: 480px; }
  .ai-bridge { flex-direction: column; gap: 12px; }
}
@media print {
  .ai-toc, .ai-mobile-nav, .ai-prompt button { display: none; }
  .ai-layout { display: block; width: 100%; padding: 20px 0; }
  .ai-hero-inner { width: 100%; padding: 20px 0; }
  .ai-prompt, .ai-note { break-inside: avoid; }
}