:root{
  --lt-purple: #7C3AED;
  --lt-blue: #2563EB;
  --lt-dark: #0F1115;
  --lt-light: #F7F7FA;
  --lt-text: #101114;
  --lt-gradient: linear-gradient(135deg, var(--lt-purple), var(--lt-blue));
}
/* Utility classes */
.lt-gradient{ background: var(--lt-gradient); }
.lt-logo-shadow{ filter: drop-shadow(0 8px 24px rgba(37,99,235,0.35)); }