#create-game-form button[type='submit'],
a[href*=':token'] {
    position: relative;
}


#create-game-form button[type='submit']::after,
a[href*=':token']::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 5px;
    background-color: #9b2828;
    display: none;
}

#create-game-form button[type='submit'].loading::after,
a[href*=':token'].loading::after {
    display: block;
    animation: loadAnimation 2s ease-in-out infinite;
}

@keyframes loadAnimation {
    0% {
        left: 0;
        width: 0;
    }
    50% {
        left: 0;
        width: 100%;
    }
    100% {
        left: 100%;
        width: 0;
    }
}