html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #584f40;
  overscroll-behavior: none;
}

#sheet {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

/* Честная плашка сбоя: игра не умирает молча */
#crash {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(46, 38, 26, 0.55);
  z-index: 10;
}
#crash[hidden] { display: none; }

.crash-card {
  background: #f8f3e0;
  border: 2px solid #2c4a91;
  border-radius: 10px;
  padding: 22px 30px;
  text-align: center;
  font-family: "Segoe Print", "Comic Sans MS", cursive, sans-serif;
  color: #2c4a91;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.crash-title { font-size: 22px; font-weight: bold; }
.crash-text  { font-size: 17px; margin-top: 8px; }
.crash-err   {
  font-size: 12px;
  margin-top: 10px;
  opacity: 0.6;
  max-width: 260px;
  word-break: break-word;
}