:root {
    --ring-width: 2px;
    --ring-color: white;
    --ring-spacing: 25px;
    --largest-ring-size: 200px;
}

* {
    margin: 0;
    padding: 0;
}

body {
    width: 100vw;
    height: 100vh;
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image_box {
    width: 100%;
    height: 100%;
    position: absolute;
    background-image: url("./scary_eyes.jpg");
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 0;
}

.two_eyes_flex {
    position: absolute;
    width: 100%;
    height: 100%;
}

.pupil {
    position: absolute;
    width: 280px;
    aspect-ratio: 1/1;
    background-color: black;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
}

#pupil_a {
    transform: translate(58vw, 210px);
}
#pupil_b {
    transform: translate(250px, 350px);
}

.ring {
    aspect-ratio: 1/1;
    background-color: black;
    border-radius: 50%;
    box-shadow: 0px 0px 0px var(--ring-width) var(--ring-color);
    position: absolute;
    transition: width 2s;
}

#ring_a {
    width: var(--largest-ring-size);
}
#ring_b {
    width: calc(var(--largest-ring-size) - var(--ring-spacing));
}
#ring_c {
    width: calc(var(--largest-ring-size) - var(--ring-spacing) * 2);
}
#ring_d {
    width: calc(var(--largest-ring-size) - var(--ring-spacing) * 3);
}