.example {
    border: 1px solid var(--light-gray);
    text-align: center;
    background: var(--dark-green);
    position: relative;
}

.progress {
    margin: 8.6rem auto;
    padding: 1em 0;
    font-size: 3.6rem;
    width: 18ch;
    
    --button-color: rgba(255,255,255, .7);
    background: transparent;
    color: var(--button-color);
    border: 1px solid var(--button-color);
    border-radius: .35em;
    
    position: relative;
    transition: all .6s;
}

@media (max-width: 480px) {
    .progress {
        font-size: 2rem;
    }    
}


.progress:hover {
    --button-color: #fff;
}

.progress::before {
    content:'';
    width: 5px;
    height: 5px;
    border-radius: 8px;
    background: white;
    position: absolute;
    left: 0;
    bottom: -3px;
    box-shadow: 0 0 12px 4px #B3F0F5;
    opacity: 0;
}

.progress.active {
    border-radius: 0;
    border-color: transparent;
    border-bottom-color: var(--button-color);    
}

.progress.active::before {
    transition: left 6s linear;
    opacity: 1;
    left: 100%;
}

.progress:focus {
    outline: none;
}

.instructions {
    color: transparent;
    font-size: .8em;
    text-align: right;
    padding-right: 1.2rem;
    transition: color .5s;
    transition-delay: 5s;
}

.instructions.show {
    color: #ccc;
}