:root {
  color-scheme: light;
  --background: #edf4fc;
  --paper: #ffffff;
  --ink: #102340;
  --muted: #576c87;
  --line: #d9e6f4;
  --blue: #2f80ed;
  --blue-dark: #185ba9;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at 85% 8%, #e1efff 0%, var(--background) 52%, #f7faff 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; border-radius: 4px; }
.skip-link { position: absolute; left: 12px; top: -100px; z-index: 10; padding: 12px 16px; background: white; }
.skip-link:focus { top: 12px; }
.site-wrap { width: min(1120px, 100%); margin: 0 auto; padding: 0 28px; }
.site-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; letter-spacing: -.7px; font-size: 22px; }
.brand img { display: block; width: 44px; height: 44px; object-fit: contain; }
.brand-accent { color: var(--blue); }
.site-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.site-nav a { text-decoration: none; padding: 11px 14px; border-radius: 10px; font-size: 14px; font-weight: 650; color: var(--muted); }
.site-nav a:hover { background: #e2edfc; color: var(--blue-dark); }
.site-nav .current { background: #dcecff; color: var(--blue-dark); }
.page-intro { max-width: 760px; padding: 60px 0 42px; }
.eyebrow, .small-label { margin: 0; color: var(--blue-dark); text-transform: uppercase; letter-spacing: 1.5px; font-size: 11px; font-weight: 800; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 4px #d6e9ff; }
.page-intro h1 { margin: 16px 0; font-size: clamp(36px, 5vw, 62px); font-weight: 800; letter-spacing: -2.5px; line-height: 1.06; }
.page-intro h1 span { color: var(--blue); }
.page-intro > p:last-child { max-width: 640px; margin: 0; color: var(--muted); line-height: 1.7; font-size: 16px; }
.video-section { overflow: hidden; background: var(--paper); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 18px 60px #1b3f6c10; }
.section-heading { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px; padding: 24px 28px; }
.section-heading h2 { font-size: clamp(19px, 2.4vw, 25px); letter-spacing: -.5px; margin: 7px 0 0; }
.youtube-link { display: inline-flex; align-items: center; gap: 8px; color: var(--blue-dark); font-size: 14px; font-weight: 700; text-decoration: none; }
.youtube-link:hover, .player-caption a:hover { text-decoration: underline; }
.player-frame { background: #081725; position: relative; width: 100%; aspect-ratio: 16 / 9; }
.player-frame iframe { display: block; width: 100%; height: 100%; border: 0; }
.player-caption { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; padding: 22px 28px; }
.player-caption strong { font-size: 15px; }
.player-caption p { font-size: 13px; line-height: 1.65; color: var(--muted); max-width: 590px; margin: 6px 0 0; }
.player-caption a { white-space: nowrap; font-size: 13px; font-weight: 700; color: var(--blue-dark); text-decoration: none; }
.back-strip { display: flex; justify-content: space-between; align-items: center; gap: 22px; flex-wrap: wrap; padding: 32px 0 52px; }
.back-strip strong { font-size: 17px; }
.back-strip p { margin: 6px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.back-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.back-actions a { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 44px; padding: 11px 16px; border-radius: 10px; font-size: 14px; font-weight: 700; text-decoration: none; }
.button-primary { background: var(--blue); color: #fff; border: 1px solid var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { border: 1px solid #bad0e9; background: #fff; color: var(--blue-dark); }
.button-secondary:hover { background: #e4effc; }
.site-footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 24px 0 34px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); line-height: 1.6; }
@media (max-width: 640px) {
  .site-wrap { padding: 0 16px; }
  .site-header { gap: 8px; padding: 16px 0; }
  .brand { font-size: 19px; }
  .brand img { width: 38px; height: 38px; }
  .site-nav { width: 100%; justify-content: space-between; gap: 4px; }
  .site-nav a { font-size: 13px; padding: 10px 9px; }
  .page-intro { padding: 40px 0 26px; }
  .page-intro h1 { letter-spacing: -1.5px; }
  .page-intro > p:last-child { font-size: 15px; }
  .section-heading { padding: 20px; }
  .player-caption { padding: 18px 20px 22px; }
  .back-strip { padding: 28px 0 36px; }
  .back-actions { width: 100%; }
  .back-actions a { flex: 1; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}