:root {
  color-scheme: dark;
  --bg: #000;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.stage {
  position: relative;
  min-height: 100svh;
  width: 100%;
  background: #000;
}

.mark-link {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: clamp(170px, 28vw, 300px);
  transform: translate(-50%, -50%);
  line-height: 0;
  outline: none;
}

.mark {
  display: block;
  width: 100%;
  height: auto;
  -webkit-user-drag: none;
  user-select: none;
}

.mark-link:hover .mark,
.mark-link:focus-visible .mark {
  filter: drop-shadow(0 0 18px rgba(255, 255, 255, 0.28));
}