/* Neon sign glowing effect for START button on start page */
/* Staggered left-to-right brightness wave on border and text */

.start-button-glow {
    position: relative;
    animation: traveling-wave 5s ease-in-out infinite;
}

/* Brightness wave that travels left to right */
/* Increased intensity: Base 1.0 → peak 1.35 (was 1.15) */
@keyframes traveling-wave {
    0% {
        filter: brightness(1.0);
    }
    33% {
        filter: brightness(1.35);
    }
    66% {
        filter: brightness(1.0);
    }
    100% {
        filter: brightness(1.0);
    }
}