#subliminal-container { z-index: 9999; }
.subliminal-msg {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Orbitron', sans-serif;
    font-size: 10vw;
    font-weight: 900;
    color: white;
    text-transform: uppercase;
    white-space: nowrap;
    opacity: 0;
    text-align: center;
}
.subliminal-msg:nth-child(1) { animation: flash1 13s infinite; }
.subliminal-msg:nth-child(2) { animation: flash2 17s infinite; }
.subliminal-msg:nth-child(3) { animation: flash3 23s infinite; }

@keyframes flash1 { 0%, 98%, 100% { opacity: 0; } 99% { opacity: 0.1; } }
@keyframes flash2 { 0%, 98%, 100% { opacity: 0; } 99% { opacity: 0.15; color: red; } }
@keyframes flash3 { 0%, 98%, 100% { opacity: 0; } 99% { opacity: 0.1; color: cyan; } }