body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #1c1c1a;
  font-family: sans-serif;
  color: #e8e6dc;
}
h1 { font-size: 16px; font-weight: 500; margin: 0 0 12px; }
p.hint { font-size: 13px; color: #a9a79c; margin: 8px 0 0; }
canvas {
  background: #2a2a27;
  border: 2px solid #5f5e5a;
  image-rendering: pixelated;
}
#popup {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.6);
}
#popup .box {
  background: #2a2a27;
  border: 2px solid #7f77dd;
  border-radius: 12px;
  padding: 32px 48px;
  text-align: center;
}
#popup .box h2 { margin: 0 0 8px; font-size: 22px; color: #cecbf6; }
#popup .box button {
  margin-top: 16px;
  padding: 8px 20px;
  background: transparent;
  border: 1px solid #7f77dd;
  color: #cecbf6;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
#debug {
  margin-top: 8px;
  font-size: 12px;
  color: #f0997b;
}