body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #0f0f0f;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

.logo {
  width: 120px;
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  background: #00ff99;
  border: none;
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}