/* Shared, self-hosted explainer videos. Existing image URLs remain in the HTML. */
.explainer-section { margin-block: 1.35rem 2rem; scroll-margin-top: 120px; }
.explainer-heading { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; margin-bottom: .8rem; }
.explainer-heading h2 { margin: 0; font-size: clamp(1.15rem, 2.4vw, 1.5rem); }
.explainer-heading > a { font-size: .88rem; }
.explainer-topics { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1rem; }
.explainer-topics a { display: inline-flex; align-items: center; min-height: 44px; padding: .55rem .9rem; border: 1px solid var(--line-strong); border-radius: var(--radius-pill); background: var(--surface); color: var(--text-strong); text-decoration: none; font-weight: 700; }
.explainer-topics a[aria-current="true"] { color: #fff; background: var(--cta-blue-end); border-color: var(--cta-blue-end); }
.explainer-video { margin: 0; min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-2); scroll-margin-top: 120px; }
.explainer-video[hidden] { display: none !important; }
.explainer-video + .explainer-video { margin-top: 1.2rem; }
.explainer-group.is-enhanced .explainer-video { margin-top: 0; }
.explainer-frame { position: relative; isolation: isolate; aspect-ratio: 16 / 9; background: #0d1822; }
.explainer-frame video { display: block; width: 100%; height: 100%; aspect-ratio: 16 / 9; object-fit: contain; }
.explainer-cover { display: none; }
.explainer-video.is-enhanced:not(.is-playing) .explainer-cover { position: absolute; inset: 0; display: block; }
.explainer-cover img { display: block; width: 100%; height: 100%; min-height: 0 !important; aspect-ratio: auto !important; object-fit: cover; border-radius: 0 !important; }
.explainer-cover::after { content: ""; pointer-events: none; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(5,20,30,.02) 35%, rgba(5,20,30,.58)); }
.explainer-play { position: absolute; inset: 0; z-index: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .75rem; width: 100%; padding: 1rem; border: 0; border-radius: 0; color: #fff; background: transparent; cursor: pointer; font: inherit; }
.explainer-play-icon { display: grid; place-items: center; flex: none; width: clamp(52px, 7vw, 76px); height: clamp(52px, 7vw, 76px); border: 2px solid rgba(255,255,255,.85); border-radius: 50%; color: #fff; background: #096b65; box-shadow: 0 5px 24px rgba(0,0,0,.3); transition: transform .18s ease, background .18s ease; }
.explainer-play-icon svg { width: 26px; height: 26px; fill: currentColor; margin-left: 3px; }
.explainer-play:hover .explainer-play-icon { transform: scale(1.06); background: #075f58; }
.explainer-play-label { display: flex; flex-wrap: wrap; justify-content: center; gap: .4rem .65rem; padding: .5rem .85rem; border-radius: var(--radius-pill); background: rgba(5,20,30,.88); color: #fff; font-size: .92rem; line-height: 1.4; }
.explainer-play:focus-visible { outline: 4px solid #fff; outline-offset: -7px; }
.explainer-caption { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .8rem 1.2rem; padding: 1rem 1.1rem; }
.explainer-caption-copy { flex: 1 1 250px; min-width: 0; }
.explainer-caption strong { display: block; color: var(--text-strong); font-size: 1rem; }
.explainer-caption p { margin: .25rem 0 0; font-size: .86rem; line-height: 1.55; color: var(--text-muted); }
.explainer-caption .btn { flex: 0 1 auto; font-size: .86rem; }
.explainer-status { margin: 0; padding: 0 1rem; font-size: .9rem; color: var(--text-body); }
.explainer-status:empty { display: none; }
.explainer-status:not(:empty) { padding-block: .75rem; }
.explainer-fallback { flex-basis: 100%; margin: 0; padding: 0; font-size: .8rem; }
.explainer-compact { margin-block: 1.1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); overflow: hidden; }
.explainer-compact > summary { display: flex; align-items: center; gap: .85rem; padding: .75rem; list-style: none; cursor: pointer; color: var(--text-strong); }
.explainer-compact > summary::-webkit-details-marker { display: none; }
.explainer-compact-thumb { position: relative; flex: none; width: 92px; aspect-ratio: 16 / 9; overflow: hidden; border-radius: 8px; background: #0d1822; }
.explainer-compact-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.explainer-compact-thumb::after { content: "▶"; position: absolute; inset: 0; display: grid; place-items: center; background: rgba(5,20,30,.28); color: #fff; font-size: 1.35rem; }
.explainer-compact strong { display: block; line-height: 1.4; font-size: .96rem; }
.explainer-compact small { display: block; color: var(--text-muted); font-size: .82rem; }
.explainer-compact[open] > summary { border-bottom: 1px solid var(--line); }
.explainer-compact .explainer-video { border: 0; border-radius: 0; box-shadow: none; }
.explainer-compact > summary:focus-visible, .explainer-topics a:focus-visible { outline: 3px solid var(--brand-focus); outline-offset: -3px; }
.explainer-card-note { display: block; margin-top: .45rem; color: var(--brand-strong); font-size: .82rem; font-weight: 700; }
.explainer-directory-link { margin-top: 1.2rem; }
.video-library-intro { max-width: 740px; }
.video-library-section { margin-top: 2.5rem; scroll-margin-top: 120px; }
.video-library-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; }
.video-library-card { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); text-decoration: none; color: var(--text-body); box-shadow: var(--shadow-2); }
.video-library-card:hover { border-color: var(--brand); }
.video-library-poster { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #0d1822; }
.video-library-poster img { display: block; width: 100%; height: 100%; object-fit: cover; }
.video-library-poster .explainer-play-icon { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 48px; height: 48px; }
.video-library-duration { position: absolute; right: .6rem; bottom: .6rem; padding: .15rem .45rem; border-radius: 5px; background: rgba(5,20,30,.88); color: #fff; font-size: .8rem; }
.video-library-copy { padding: 1rem; }
.video-library-copy h3 { margin: 0 0 .4rem; font-size: 1.12rem; }
.video-library-copy p { margin: 0; font-size: .9rem; }
.video-library-copy > span { display: block; margin-top: .8rem; font-size: .85rem; font-weight: 700; color: var(--brand-strong); }
.video-watch-shell { max-width: 980px; }
.video-watch-shell h1 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
.video-watch-details { margin-top: 1.4rem; }
.video-watch-details h2 { font-size: 1.3rem; }
@media (max-width: 800px) { .video-library-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) {
  .video-library-grid { grid-template-columns: minmax(0, 1fr); }
  .explainer-caption { padding: .8rem; gap: .65rem; }
  .explainer-caption-copy { flex-basis: 100%; }
  .explainer-caption .btn { width: 100%; }
  .explainer-play-label { font-size: .8rem; }
  .explainer-compact-thumb { width: 76px; }
  .explainer-topics a { padding: .5rem .75rem; font-size: .88rem; }
}
@media (prefers-reduced-motion: reduce) { .explainer-play-icon { transition: none; } }