body {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #fff;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', sans-serif;
}
.login-box {
  background-color: #1c1f26;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.4);
  width: 100%;
  max-width: 400px;
}
.form-control {
  background-color: #2a2f3a;
  color: #fff;
  border: none;
}
.form-control::placeholder {
  color: #aaa;
}
.form-control:focus {
  background-color: #2a2f3a;
  border-color: #0dcaf0;
  box-shadow: none;
}
.btn-primary {
  background-color: #0dcaf0;
  border: none;
}
.btn-primary:hover {
  background-color: #31d2f2;
}
.branding {
  font-weight: bold;
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
  color: #0dcaf0;
}
.footer {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: #888;
  text-align: center;
}
.error {
  margin-top: 10px;
  color: #ff5f5f;
}