tutorial.css

#tutorial {
    transition: 200ms;

    position: absolute;
    top: 0;

    background-color: var(--bg);
    width: 400px;
}

#tutorial.hidden {
    transform: scale(80%);
    opacity: 0;
    pointer-events: none;
}

.tuto-inner {
    display: flex;
    flex-direction: column;
    padding: calc(5 * var(--pixel));
}

#tuto-left-anchor {
    position: absolute;
    left: 50px;
    top: 50%;

    width: 0px;
    height: 0px;
}

#tuto-right-anchor {
    position: absolute;
    right: 50px;
    top: 50%;

    width: 0px;
    height: 0px;
}

.tuto-right {
    right: 50px;
}

#tuto-title {
    font-weight: bold;
}

.progress-bar {
    width: 100%;
    height: calc(2 * var(--pixel));
    background-color: var(--bg-l);
}

.bar-fill {
    height: 100%;
    background-color: var(--prim);
    transition: 200ms;
    width: 100%;
}

#tuto-btns {
    margin-top: calc(3 * var(--pixel));
}

#tuto-highlight {
    pointer-events: none;
    position: absolute;
    background-color: #0f03;
    outline: var(--pixel) solid var(--prim);
    animation: 800ms infinite highlight-anim;
    z-index: 100;
}

.tuto-command {
    color: var(--txt-d);
}

#close-tutorial {
    position: absolute;
    right: 0;
    top: 0;

    width: calc(6 * var(--pixel));
    height: calc(6 * var(--pixel));

    text-align: center;
}

#close-tutorial > span {
    display: block;
    transform: translate(calc(-0.8 * var(--pixel)), calc(-3 * var(--pixel)));
    color: var(--txt-d);
}

@keyframes highlight-anim {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.2;
    }
    100% {
        opacity: 1;
    }
}