body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #3f51b5, #2196f3);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.form-container, .inicio-container {
  background: rgba(255,255,255,0.1);
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
  text-align: center;
  width: 300px;
}

input {
  width: 90%;
  padding: 10px;
  margin: 10px 0;
  border: none;
  border-radius: 8px;
}

button, .btn {
  background: #ffeb3b;
  color: #000;
  border: none;
  padding: 10px 20px;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  margin: 10px;
  transition: all 0.3s ease;
}

button:hover, .btn:hover {
  background: #ffc107;
}

.btn.prueba {
  background: #4caf50;
  color: white;
}

.error {
  color: #ff5722;
}