/* Lettore a schermo intero: niente interazione, niente cursore, sfondo nero. */
html, body { margin: 0; height: 100%; background: #000; overflow: hidden; cursor: none; }
#palco { position: fixed; inset: 0; }
.strato { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; transition: opacity .8s ease; }
.strato.visibile { opacity: 1; }
.vuoto { position: absolute; inset: 0; display: grid; place-items: center; background: #f6f3ee; }
.vuoto img { max-width: 40vw; max-height: 30vh; object-fit: contain; }
.messaggio { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); margin: 0; color: #cfd8da;
  font: 600 2.2vmin/1.4 system-ui, sans-serif; text-align: center; }
.diagnosi { position: fixed; left: 1vmin; bottom: 1vmin; padding: .6em .9em; border-radius: 8px; background: rgba(0,0,0,.7);
  color: #fff; font: 1.4vmin/1.4 ui-monospace, monospace; white-space: pre; }
[hidden] { display: none !important; }