/* Click-to-play intro video card (Nicolas, 3:4). Shared by the home page, the strong-* book pages and /welcome.
   Markup: <figure class="intro-video"><video ... poster controls preload="none"><source ...></video>
   <button class="intro-play">...</button><figcaption>...</figcaption></figure>. JS: /assets/avatar-player.js */
.intro-video {
  position: relative;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}
.intro-video video {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: #0D1B2A;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(13,27,42,0.28);
}
.intro-play {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 76px;
  height: 76px;
  margin: -38px 0 0 -38px;
  border: 0;
  border-radius: 50%;
  background: #C9A84C;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  transition: transform 0.15s, background 0.15s;
}
.intro-play:hover { background: #D4B86A; transform: scale(1.06); }
.intro-play span {
  position: absolute;
  left: 30px;
  top: 23px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 15px 0 15px 24px;
  border-color: transparent transparent transparent #0D1B2A;
}
.intro-video.is-playing .intro-play { display: none; }
.intro-video figcaption {
  margin-top: 12px;
  font-size: 13px;
  letter-spacing: 0.02em;
  text-align: center;
  color: #8A9BB0;
}

/* Home page: the founder strip becomes video + text side by side */
.founder-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 44px;
  align-items: center;
  text-align: left;
}
.founder-grid .founder-line { align-items: flex-start; }
@media (max-width: 720px) {
  .founder-grid { grid-template-columns: 1fr; justify-items: center; text-align: center; gap: 28px; }
  .founder-grid .founder-line { align-items: center; }
}

/* Book pages: the card sits in the hero, between the welcome line and the button */
.intro-video--hero { margin-top: 32px; max-width: 280px; }