[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #131c31;
  --bg-tertiary: #1e293b;
  --bg-sidebar: linear-gradient(180deg, #0f172a 0%, #1a1442 50%, #1e1b4b 100%);
  --bg-sidebar-flat: #0f172a;
  --bg-sidebar-hover: rgba(255, 255, 255, 0.06);
  --bg-sidebar-active: rgba(99, 102, 241, 0.2);
  --bg-card: #1e293b;
  --bg-card-hover: #243044;
  --bg-input: #1e293b;
  --bg-modal-overlay: rgba(0, 0, 0, 0.7);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #0f172a;
  --text-sidebar: rgba(255, 255, 255, 0.55);
  --text-sidebar-active: #c7d2fe;
  --text-link: #818cf8;

  --border-primary: rgba(99, 102, 241, 0.1);
  --border-secondary: #475569;
  --border-focus: #818cf8;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(99, 102, 241, 0.05);
  --shadow-card-hover: 0 8px 25px -5px rgba(99, 102, 241, 0.15), 0 4px 6px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .auth-card {
  background: rgba(30, 41, 59, 0.9);
  border: 1px solid rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .auth-logo-text {
  background: linear-gradient(135deg, #a5b4fc, #c4b5fd);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}