.emisor .qr-panel {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  margin-bottom: 1.5rem;
}

.emisor .qr-container {
  min-width: 280px;
  min-height: 280px;
}

.emisor .qr-container img,
.emisor .qr-container canvas {
  max-width: min(320px, 85vw);
  height: auto;
  display: block;
  margin: 0 auto;
}

.emisor .info-panel {
  text-align: center;
}

.emisor .window-time,
.emisor .countdown {
  margin: 0.5rem 0;
  font-size: 1.1rem;
}

.emisor .label {
  color: #555;
  margin-right: 0.35rem;
}

.emisor #countdown {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #1565c0;
}