body {
  margin: 0;
  font-family: Arial;
  background: #0f0f1a;
  color: white;
}

.center {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.card {
  background: #1a1a2e;
  padding: 30px;
  border-radius: 12px;
  width: 300px;
}

input {
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  border: none;
  border-radius: 8px;
}

button {
  width: 100%;
  padding: 12px;
  background: #6c5ce7;
  border: none;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

.navbar {
  background: #141427;
  padding: 15px;
  text-align: center;
}

.container {
  padding: 20px;
}

.balance {
  background: linear-gradient(135deg, #6c5ce7, #00cec9);
  padding: 20px;
  border-radius: 12px;
}

.actions {
  display: flex;
  gap: 10px;
  margin: 20px 0;
}

.actions button {
  flex: 1;
}

.history {
  background: #1a1a2e;
  padding: 15px;
  border-radius: 10px;
}

@media (max-width: 600px) {
  .actions {
    flex-direction: column;
  }
}