body {
  margin: 0;
  background: linear-gradient(135deg, #2b2b2b, #111);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.card-hotspot {
  background: #2f2f2f;
  border: none;
  color: #fff;
  width: 100%;
  max-width: 420px;
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.6);
  text-align: center;
}

.form-control,
.form-select {
  background: #444;
  border: none;
  color: #fff;
}

.form-control:focus,
.form-select:focus {
  background: #555;
  color: #fff;
  box-shadow: none;
}

.input-group-text {
  background: #3a3a3a;
  border: none;
  color: #aaa;
}

label {
  color: #ccc;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

button {
  font-weight: 600;
}