body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #0f0f0f, #1a1a1a);
  color: #fff;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  text-align: center;
}

.titulo-app {
  font-size: 3rem;
  color: #00ff88;
  margin-bottom: 0.2em;
}

.subtitulo-app {
  font-size: 1.2rem;
  color: #ccc;
}

.botao-principal {
  margin-top: 2em;
  padding: 1em 2.5em;
  font-size: 1.2rem;
  font-weight: bold;
  border: none;
  border-radius: 10px;
  background: #00ff88;
  color: #111;
  cursor: pointer;
  transition: 0.3s ease;
}

.botao-principal:hover {
  background: #00cc6a;
  transform: scale(1.05);
}

.rodape {
  margin-top: 4em;
  font-size: 0.9rem;
  color: #888;
}