body {
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: #020617;
  padding: 24px;
  border-radius: 12px;
  width: 320px;
  text-align: center;
}

.plans {
  display: flex;
  gap: 12px;
  margin: 20px 0;
}

.plan {
  flex: 1;
  padding: 16px;
  border: 1px solid #334155;
  border-radius: 10px;
  cursor: pointer;
}

.plan.selected {
  border-color: #22c55e;
}

.plan.popular span {
  color: #22c55e;
  font-size: 12px;
}

button {
  width: 100%;
  padding: 12px;
  background: #22c55e;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

button:disabled {
  background: #334155;
  cursor: not-allowed;
}