/* Estilos generales */
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

/* Login */
.login-container {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  width: 320px;
  box-shadow: 0px 8px 20px rgba(0,0,0,0.2);
  text-align: center;
}

.login-container h2 {
  margin-bottom: 1.5rem;
  color: #333;
}

.login-container input {
  width: 100%;
  padding: 0.8rem;
  margin: 0.5rem 0;
  border: 1px solid #ddd;
  border-radius: 0.5rem;
  outline: none;
  transition: 0.3s;
}

.login-container input:focus {
  border-color: #4facfe;
  box-shadow: 0px 0px 5px rgba(79,172,254,0.5);
}

.login-container button {
  width: 100%;
  padding: 0.8rem;
  margin-top: 1rem;
  background: linear-gradient(90deg, #4facfe, #00f2fe);
  border: none;
  color: white;
  font-size: 1rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: 0.3s;
}

.login-container button:hover {
  opacity: 0.9;
}

.error {
  color: red;
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* Encuesta */
.survey-container {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  width: 400px;
  box-shadow: 0px 8px 20px rgba(0,0,0,0.2);
  text-align: center;
}

.survey-container h2 {
  margin-bottom: 1rem;
  color: #333;
}

.logout-btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.7rem 1.2rem;
  background: #ff4b5c;
  color: white;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: 0.3s;
}

.logout-btn:hover {
  background: #e63946;
}