:root {
  --ink: #12213a;
  --muted: #52627a;
  --navy: #081a35;
  --blue: #1769aa;
  --green: #35c36f;
  --red: #e84a4a;
  --paper: #ffffff;
  --wash: #f4f7fb;
  --line: #d9e1ec;
  --yellow: #ffd43b;
}
* { box-sizing: border-box; }
html { color-scheme: light; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--wash);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: var(--blue); }
a:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }
.site-header { background: var(--navy); color: white; border-bottom: 5px solid var(--green); }
.header-inner, main, .footer-inner { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: white; text-decoration: none; font-size: 1.15rem; font-weight: 850; letter-spacing: .02em; }
.brand span { color: var(--green); }
.top-link { color: white; text-underline-offset: 4px; }
main { padding: 48px 0 72px; }
.eyebrow { margin: 0 0 8px; color: var(--blue); font-weight: 850; letter-spacing: .08em; text-transform: uppercase; font-size: .82rem; }
h1 { max-width: 850px; margin: 0; color: var(--navy); font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.08; letter-spacing: -.035em; }
.lede { max-width: 780px; margin: 18px 0 0; color: var(--muted); font-size: 1.12rem; }
.notice { margin-top: 28px; padding: 16px 18px; border-left: 5px solid var(--yellow); background: white; box-shadow: 0 8px 25px rgba(18,33,58,.06); }
.series-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; margin-top: 36px; }
.card { overflow: hidden; background: white; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 12px 30px rgba(18,33,58,.08); }
.card img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; background: white; }
.card-body { padding: 22px; }
.part { color: var(--red); font-weight: 850; text-transform: uppercase; letter-spacing: .08em; font-size: .78rem; }
.card h2 { margin: 7px 0 8px; color: var(--navy); font-size: 1.35rem; line-height: 1.25; }
.card p { margin: 0 0 18px; color: var(--muted); }
.button { display: inline-flex; align-items: center; gap: 8px; padding: 10px 15px; border-radius: 10px; color: white; background: var(--blue); font-weight: 800; text-decoration: none; }
.button:hover { background: #10578e; }
.video-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: 30px; margin-top: 34px; align-items: start; }
.cover { width: 100%; display: block; border: 1px solid var(--line); border-radius: 18px; background: white; box-shadow: 0 14px 34px rgba(18,33,58,.1); }
.video-player { width: 100%; aspect-ratio: 16 / 9; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--navy); box-shadow: 0 14px 34px rgba(18,33,58,.1); }
.video-player iframe { display: block; width: 100%; height: 100%; border: 0; }
.video-actions { margin: 12px 0 0; }
.video-actions a { font-weight: 800; text-underline-offset: 3px; }

.downloads, .shared-panel { background: white; border: 1px solid var(--line); border-radius: 18px; padding: 24px; box-shadow: 0 12px 30px rgba(18,33,58,.07); }
.downloads h2, .shared-panel h2 { margin: 0 0 6px; color: var(--navy); font-size: 1.35rem; }
.download-list { list-style: none; padding: 0; margin: 18px 0 0; }
.download-list li { border-top: 1px solid var(--line); }
.download-list a { display: block; padding: 14px 2px; font-weight: 750; text-decoration: none; }
.download-list a:hover { text-decoration: underline; }
.resource-type { display: block; color: var(--muted); font-size: .82rem; font-weight: 600; }
.shared-panel { margin-top: 28px; }
.safety { margin-top: 28px; padding: 22px; border: 2px solid #f4b7b7; border-radius: 16px; background: #fff5f5; }
.safety h2 { margin-top: 0; color: #a72121; }
.safety ol { margin-bottom: 16px; }
.safety .button { background: #a72121; }
.safety .button:hover { background: #861919; }
.pagination { display: flex; justify-content: space-between; gap: 18px; margin-top: 34px; }
.pagination a { font-weight: 800; }
footer { background: var(--navy); color: #cbd7e8; }
.footer-inner { padding: 28px 0; font-size: .92rem; }
code { background: #eef3f8; border-radius: 5px; padding: .08em .3em; }
@media (max-width: 760px) {
  .header-inner { align-items: flex-start; flex-direction: column; padding: 18px 0; }
  main { padding-top: 34px; }
  .series-grid, .video-layout { grid-template-columns: 1fr; }
  .video-layout { gap: 22px; }
  .pagination { flex-direction: column; }
}