/* === Tema claro === */
body {
  background: #f4f6f9;
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: #212529;
}

.card {
  border: none;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.form-control {
  border-radius: 0.6rem;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

.btn {
  border-radius: 0.6rem;
  padding: 0.6rem 1.2rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.card-title, .navbar-brand {
  font-weight: 600;
}

.container {
  max-width: 1100px;
}

label.form-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: #333;
}

/* === Tema oscuro === */
body.dark-mode {
  background: #181a1b;
  color: #e4e6eb;
}

body.dark-mode .card {
  background: #242526;
  color: #e4e6eb;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

body.dark-mode .navbar {
  background: #111 !important;
}

body.dark-mode .form-control,
body.dark-mode .form-select {
  background: #3a3b3c;
  color: #e4e6eb;
  border: 1px solid #555;
}

body.dark-mode label.form-label {
  color: #ddd;
}