<!-- start Simple Custom CSS and JS -->
<style type="text/css">
/* --- Section vidéo --- */
.section-video {
  position: relative;
  width: 100%;
  overflow: hidden;
 height: 100vh; /* prend toute la hauteur écran */
}

/* --- Iframe YouTube --- */
#youtube-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: -1;
}

#youtube-bg iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120vw;  /* zoom léger */
  height: 120vh;
  transform: translate(-50%, -50%);
  pointer-events: none;
}




/* --- Bouton son --- */
#sound-btn {
  position: absolute;
  bottom: 20px;
  right: 20px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  padding: 10px 15px;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
  z-index: 9;
  transition: background 0.3s;
}
#sound-btn:hover {
  background: rgba(0,0,0,0.8);
}
</style>
<!-- end Simple Custom CSS and JS -->
