@import url("https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  --stroke-width: clamp(4px, 0.5vw, 8px);

  display: grid;
  place-items: center;
  background: #f1f1f1;
  font-family: "Space Mono";
  font-weight: 700;
  font-size: clamp(0.75rem, 1.25vw, 1.5rem);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.grid {
  width: 100vw;
  min-height: 100vh;
  display: grid;
  gap: clamp(0.75rem, 1.5vw, 2rem);
  padding: clamp(0.75rem, 1.5vw, 2rem);
  background: #fff;
  grid-column: 1;
}

.grid div {
  position: relative;
  background-size: cover;
  background-position: center center;
}

.grid div:hover {
  opacity: 0.5;
}

.circle:after {
  position: absolute;
  content: "";
  top: 50%;
  left: 50%;
  width: 20%;
  aspect-ratio: 1 / 1;
  background: #000;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.circle--outline:after {
  background: #fff;
  border: var(--stroke-width) solid #000;
}

.tracker {
  position: fixed;
  top: 0;
  left: 0;
  font-size: 3rem;
  line-height: 3rem;
  transform: translate(-50%, -50%);
  color: red;
  font-weight: 400;
  pointer-events: none;
  opacity: 0;
}

.instruction {
  text-decoration: underline;
  text-underline-offset: 0.125rem;
  text-decoration-thickness: 0.125rem;
  color: blue;
}