.bt-flow { font-family: Arial, sans-serif; padding: 20px; max-width: 600px; margin: auto; }
.bt-flow .step { margin-bottom: 30px; }
.bt-flow input, .bt-flow button { padding: 8px; margin: 5px 0; width: 100%; }
.bt-address, .bt-plan, .bt-slot {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 10px;
  margin: 6px 0;
  cursor: pointer;
}
.bt-address.active, .bt-plan.active, .bt-slot.active {
  background-color: #0073aa;
  color: #fff;
  border-color: #0073aa;
}
.bt-flow button { background: #0073aa; color: #fff; border: none; cursor: pointer; border-radius: 5px; }
.bt-flow button:hover { background: #005d8f; }