:root {
  --hs: 210, 100%;
  --valid: hsl(var(--hs), 90%);
  --complete: hsl(var(--hs), 75%);
  --winner: gold;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Lilita One", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue",
    sans-serif;
  font-size: 2rem;
}

input {
  font: inherit;
  border: 2px solid hsla(0, 0%, 0%, 0.2);
  padding: 0.5em;
  text-align: center;
  border-radius: 4px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-size), 1fr);
  grid-template-rows: repeat(var(--grid-size), 1fr);
  margin: 1rem;
  gap: 2px;
}

.grid span {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.grid input:valid {
  background-color: var(--valid);
}

.confetti {
  align-items: center;
  background-image: url(confetti.webp);
  background-position: center;
  background-size: cover;
  bottom: 0;
  display: var(--confetti-display, none);
  font-size: 5em;
  font-weight: 900;
  justify-content: center;
  left: 0;
  letter-spacing: 0.125ch;
  position: absolute;
  right: 0;
  text-align: center;
  top: 0;
}