.chapters-shell { min-height: 100vh; }
.chapters-shell a:focus-visible { outline: 3px solid var(--gold); outline-offset: 5px; }
.chapters-intro { max-width: 1200px; margin: 0 auto; padding: 64px 32px 76px; position: relative; }
.chapters-intro h1 { font-family: 'IBM Plex Serif', serif; font-size: clamp(36px, 5vw, 64px); font-weight: 500; color: var(--white); line-height: 1.12; max-width: 850px; margin: 20px 0; }
.chapters-intro p { max-width: 690px; margin: 0; text-align: left; color: #cdd8e3; font-size: 18px; line-height: 1.7; }
.chapters-eyebrow { display: flex; align-items: center; gap: 14px; color: #ef7d1c; text-transform: uppercase; letter-spacing: 2px; font-size: 12px; font-weight: 600; }
.chapters-eyebrow img { background: #eef2f7; border-radius: 12px; padding: 8px; width: 56px; height: 56px; }
.chapters-main { max-width: 1200px; margin: 0 auto; padding: 56px 32px 80px; }
.chapters-heading { margin-bottom: 26px; }
.chapters-heading h2 { font-family: 'IBM Plex Serif', serif; font-size: 34px; margin-top: 10px; }
.chapter-card { display: grid; grid-template-columns: 320px 1fr; background: #fff; border: 1px solid #dbe2e9; border-radius: 16px; overflow: hidden; color: inherit; text-decoration: none; transition: transform .2s, box-shadow .2s; }
.chapter-card:hover { transform: translateY(-4px); box-shadow: 0 16px 36px #14324f15; }
.chapter-card-poster { background: #e8e3d9; }
.chapter-card-poster img { display: block; width: 100%; height: auto; }
.chapter-card-copy { padding: 36px 42px; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.chapter-brand { width: 148px; height: auto; margin-bottom: 22px; }
.chapter-brands { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin-bottom: 22px; }
.chapter-brands .chapter-brand { margin-bottom: 0; }
.chapter-course-logo { width: 190px; height: auto; }
.chapter-card h3 { font-family: 'IBM Plex Serif', serif; font-size: 32px; line-height: 1.2; margin: 14px 0; }
.chapter-card-copy p { line-height: 1.65; color: var(--muted); }
.chapter-pill { display: inline-block; padding: 7px 12px; border: 1px solid #ff1f1f50; color: #9c1414; background: #fff6f4; border-radius: 5px; font-size: 12px; font-weight: 600; letter-spacing: .5px; }
.chapter-facts { display: grid; gap: 8px; padding: 22px 0; list-style: none; font-size: 15px; }
.chapter-card-action { color: var(--teal); font-weight: 600; margin-top: 6px; }
.chapters-origin { border-left: 3px solid var(--gold); padding: 4px 0 4px 24px; margin-top: 42px; max-width: 760px; }
.chapters-origin h2 { font-family: 'IBM Plex Serif', serif; font-size: 24px; margin-bottom: 12px; }
.chapters-origin p { color: var(--muted); line-height: 1.7; }
.chapters-footer { background: var(--teal-dark); color: #d5e0eb; padding: 32px; display: flex; gap: 24px; align-items: center; justify-content: space-between; font-size: 14px; }
.chapters-footer a { color: #fff; text-underline-offset: 4px; }
.depuy-page { --depuy-red: #ff1f1f; --depuy-plum: #2f1849; --depuy-cream: #e8e3d9; background: #f8f6f0; color: var(--depuy-plum); }
.depuy-page a:focus-visible { outline-color: var(--depuy-red); }
.depuy-nav { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 22px 40px; border-bottom: 1px solid #2f184920; }
.depuy-nav-brand { display: flex; align-items: center; gap: 12px; color: var(--depuy-plum); font-size: 14px; font-weight: 600; text-decoration: none; }
.depuy-nav-brand img { width: 42px; height: 42px; }
.depuy-nav-links { display: flex; gap: 24px; flex-wrap: wrap; font-size: 14px; }
.depuy-nav-links a { color: var(--depuy-plum); text-underline-offset: 5px; }
.depuy-hero { display: grid; grid-template-columns: 1fr .88fr; align-items: center; gap: 64px; max-width: 1260px; margin: 0 auto; padding: 58px 40px; }
.depuy-hero-copy .chapter-brand { width: 185px; }
.depuy-hero-copy .chapter-course-logo { width: 250px; }
.chapter-cme-badge { width: 110px; height: auto; }
.depuy-eyebrow { display: block; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; font-weight: 600; color: #a71919; }
.depuy-hero h1 { font-weight: 300; font-size: clamp(42px, 5.4vw, 72px); letter-spacing: -2px; line-height: 1.08; margin: 18px 0; color: var(--depuy-red); }
.depuy-subtitle { font-size: 24px; font-weight: 300; line-height: 1.4; margin-bottom: 20px; }
.depuy-hero-copy > p:not(.depuy-subtitle) { font-size: 16px; line-height: 1.7; }
.depuy-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; border-top: 1px solid var(--depuy-red); padding: 24px 0; margin-top: 28px; }
.depuy-facts dt { font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 8px; }
.depuy-facts dd { font-size: 17px; line-height: 1.5; font-weight: 500; }
.depuy-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.depuy-button { display: inline-flex; justify-content: center; align-items: center; padding: 13px 22px; border: 1px solid var(--depuy-plum); text-decoration: none; color: var(--depuy-plum); font-size: 14px; font-weight: 500; border-radius: 3px; transition: background .2s; }
.depuy-button:hover { background: #2f18490a; }
.depuy-button-primary { background: var(--depuy-plum); color: #fff; }
.depuy-button-primary:hover { background: #452867; }
.depuy-poster { margin: 0; }
.depuy-poster img { display: block; width: 100%; height: auto; box-shadow: 0 14px 36px #2f184920; }
.depuy-poster figcaption { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; padding-top: 14px; }
.depuy-poster a { color: var(--depuy-plum); text-underline-offset: 4px; }
.depuy-strip { background: var(--depuy-cream); padding: 26px 40px; }
.depuy-strip p { max-width: 1180px; margin: auto; font-size: 15px; line-height: 1.7; }
.depuy-section { max-width: 1260px; margin: 0 auto; padding: 64px 40px; }
.depuy-section h2 { font-weight: 300; font-size: 38px; color: var(--depuy-red); line-height: 1.2; margin-bottom: 24px; }
.depuy-overview { display: grid; grid-template-columns: 1.25fr 1fr; gap: 60px; }
.depuy-section p { line-height: 1.75; margin-bottom: 18px; }
.depuy-side { border-left: 1px solid var(--depuy-red); padding-left: 28px; }
.depuy-side h3 { font-size: 19px; font-weight: 500; margin-bottom: 14px; }
.depuy-faculty { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.depuy-faculty figure { margin: 0; }
.depuy-faculty img { display: block; width: 100%; height: auto; aspect-ratio: 345 / 473; object-fit: cover; object-position: top; }
.depuy-faculty figcaption { padding-top: 14px; font-size: 14px; line-height: 1.45; }
.depuy-faculty strong { display: block; font-weight: 600; margin-bottom: 4px; }
.depuy-agenda { border-top: 1px solid #2f184920; }
.depuy-agenda > p { max-width: 740px; }
.depuy-agenda details { margin-top: 20px; border: 1px solid #2f184925; border-radius: 4px; overflow: hidden; }
.depuy-agenda summary { display: flex; justify-content: space-between; gap: 14px; padding: 24px; background: var(--depuy-cream); cursor: pointer; font-size: 18px; font-weight: 500; list-style: none; }
.depuy-agenda summary::-webkit-details-marker { display: none; }
.depuy-agenda summary::after { content: '+'; color: #a71919; font-size: 24px; }
.depuy-agenda details[open] summary::after { content: '−'; }
.depuy-agenda summary:focus-visible { outline: 3px solid var(--depuy-red); outline-offset: -4px; }
.agenda-row { display: grid; grid-template-columns: 150px 1fr 180px; gap: 24px; padding: 22px 24px; border-top: 1px solid #2f184920; font-size: 14px; line-height: 1.6; }
.agenda-row h4 { font-weight: 600; font-size: 15px; }
.agenda-row p { margin: 5px 0 0; }
.agenda-time { font-weight: 500; }
.agenda-faculty { font-size: 13px; }
.agenda-break { background: #e8e3d950; }
.depuy-note { font-size: 13px; margin-top: 18px; }
.depuy-logistics { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; border-top: 1px solid #2f184920; }
.depuy-logistics h3 { margin-bottom: 12px; font-weight: 500; }
.depuy-logistics address { font-style: normal; line-height: 1.8; }
.depuy-footer { background: var(--depuy-cream); color: var(--depuy-plum); }
.depuy-footer a { color: var(--depuy-plum); }
@media (max-width: 900px) {
  .chapter-card { grid-template-columns: 260px 1fr; }
  .chapter-card-copy { padding: 28px; }
  .depuy-hero { gap: 32px; }
  .depuy-overview { gap: 30px; }
  .depuy-faculty { gap: 14px; }
  .agenda-row { grid-template-columns: 125px 1fr; gap: 16px; }
  .agenda-faculty { grid-column: 2; }
}
@media (max-width: 640px) {
  .chapters-intro, .chapters-main { padding: 36px 20px; }
  .chapter-card { grid-template-columns: 1fr; }
  .chapter-card-poster { padding: 24px; }
  .chapter-card-poster img { max-width: 290px; margin: auto; }
  .chapter-card-copy { padding: 28px 24px; }
  .chapter-card h3 { font-size: 28px; }
  .chapters-footer { flex-direction: column; align-items: flex-start; padding: 28px 20px; }
  .depuy-nav { padding: 18px 20px; flex-direction: column; align-items: flex-start; gap: 14px; }
  .depuy-nav-links { gap: 18px; }
  .depuy-hero { grid-template-columns: 1fr; padding: 36px 20px; }
  .depuy-hero-copy .chapter-course-logo, .chapter-course-logo { width: 170px; }
  .depuy-hero-copy .chapter-brand, .chapter-brands .chapter-brand { width: 120px; }
  .chapter-cme-badge { width: 80px; }
  .depuy-poster { max-width: 420px; margin: 0 auto; }
  .depuy-section { padding: 42px 20px; }
  .depuy-overview, .depuy-logistics { grid-template-columns: 1fr; gap: 24px; }
  .depuy-faculty { grid-template-columns: repeat(2, 1fr); gap: 24px 18px; }
  .depuy-strip { padding: 24px 20px; }
  .depuy-agenda summary { padding: 18px; font-size: 16px; }
  .agenda-row { padding: 18px; grid-template-columns: 1fr; gap: 8px; }
  .agenda-faculty { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .chapter-card, .depuy-button { transition: none; }
}