html,body{margin:0;padding:0;overflow:hidden;width:100%;height:100%}.container{max-width:100vw}.pulse-border{border-radius:12px;box-shadow:inset 0 0 #09f9;animation:pulseBorderInward 3s ease-in-out infinite}@keyframes pulseBorderInward{0%{box-shadow:inset 0 0 12px 4px #09f9}50%{box-shadow:inset 0 0 16px 6px #0099ffe6}to{box-shadow:inset 0 0 12px 4px #09f9}}@media (prefers-reduced-motion: reduce){.pulse-border:after{animation:none;box-shadow:0 0 #0099ff59}}.dead-border{border-radius:12px;box-shadow:inset 0 0 16px 6px #ff003999}