:root { --fg:#111; --bg:#fff; --muted:#666; --accent:#2563eb; }
body { background: var(--bg); color: var(--fg); }
.card { border-radius: 12px; }
.text-secondary.small { color: var(--muted) !important; }

/* --- Buttons visibility fixes --- */
.btn.btn-primary, .btn-primary {
  color: #fff !important;
}
.btn.btn-primary:disabled, .btn-primary:disabled {
  color: #fff !important;
  opacity: .75;
}

/* Hover/active states for clarity */
.btn-primary:hover, .btn-primary:focus {
  filter: brightness(0.95);
}

/* Dark-mode safe navbar/link contrast */
:root[data-theme="dark"] .navbar {
  background-color: #0e1627;
  border-bottom: 1px solid #23324f;
}
:root[data-theme="light"] .navbar {
  background-color: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}
:root[data-theme="dark"] .navbar .nav-link,
:root[data-theme="dark"] .navbar .navbar-brand {
  color: #e6f0ff !important;
}
:root[data-theme="light"] .navbar .nav-link,
:root[data-theme="light"] .navbar .navbar-brand {
  color: #0f172a !important;
}
.navbar .nav-link.active { font-weight: 600; }