/* Viền sáng chạy quanh mép màn hình: tím -> chàm -> vàng -> trắng */
.tarot-app::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;border-radius:0;
  box-shadow:inset 0 0 70px 6px rgba(139,92,246,.42),inset 0 0 160px 10px rgba(139,92,246,.16);
  animation:fxEdgeGlow 14s ease-in-out infinite alternate}
@keyframes fxEdgeGlow{
  0%{box-shadow:inset 0 0 70px 6px rgba(139,92,246,.42),inset 0 0 160px 10px rgba(139,92,246,.16)}
  30%{box-shadow:inset 0 0 80px 8px rgba(99,102,241,.40),inset 0 0 170px 12px rgba(212,175,55,.14)}
  60%{box-shadow:inset 0 0 70px 6px rgba(212,175,55,.36),inset 0 0 160px 10px rgba(139,92,246,.2)}
  100%{box-shadow:inset 0 0 70px 6px rgba(255,255,255,.34),inset 0 0 170px 12px rgba(196,181,253,.22)}}
@media (prefers-reduced-motion:reduce){.tarot-app::after{animation:none}}