* { box-sizing: border-box; margin: 0; }

html, body {
  height: 100%;
  background: #000;
  color: #fff;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

#app {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

#mensaje {
  padding: 24px;
  text-align: center;
  font-size: 18px;
  opacity: .85;
}

#sonido {
  position: absolute;
  top: calc(16px + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, .92);
  color: #000;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

[hidden] { display: none !important; }