html, body {
  height: 100%;
  background: #f4f5f7;
}

.app-shell {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  background: #f4f5f7;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 24px rgba(0, 0, 0, 0.08);
}

.app-view {
  min-height: 100vh;
  min-height: 100dvh;
  flex-direction: column;
}

.app-view.d-none {
  display: none !important;
}

.scan-fab {
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(13, 110, 253, 0.35);
}

.scan-fab-icon {
  font-size: 3rem;
  line-height: 1;
}

#qr-reader {
  max-width: 480px;
}

#qr-reader video {
  object-fit: cover;
}

.warning-icon {
  font-size: 3.5rem;
  color: #dc3545;
}

.done-icon {
  font-size: 3.5rem;
  color: #198754;
}

.app-footer img {
  flex-shrink: 0;
}

.app-footer span {
  line-height: 1.2;
}