* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --x: 50%;
  --y: 50%;
}
section {
  position: relative;
  min-height: 100vh;
  background-color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
}
section h2 {
  color: #fff;
  font-size: 9em;
  cursor: default;
}
.light {
  --x: 50%;
  --y: 50%;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(circle at var(--x) var(--y), transparent 10%, rgba(0, 0, 0, 0.95) 30%);
}