:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f7f7f2;
  color: #161616;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: max(1.5rem, env(safe-area-inset-top)) max(1.5rem, env(safe-area-inset-right)) max(1.5rem, env(safe-area-inset-bottom)) max(1.5rem, env(safe-area-inset-left));
}

main {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1.25rem, 6vw, 3.5rem);
  width: 100%;
}

button {
  flex: 0 0 auto;
  width: clamp(6.5rem, 28vw, 8rem);
  aspect-ratio: 1;
  border: 0;
  border-radius: 50%;
  background: #f4ff56;
  color: #161616;
  font: inherit;
  font-size: clamp(0.88rem, 3.8vw, 1rem);
  font-weight: 750;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 0.45rem 0 #161616;
  transform: translateY(-0.2rem);
  transition: transform 100ms ease, box-shadow 100ms ease, background 160ms ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
}

button:hover {
  background: #ecfa22;
}

button:active,
button.is-pressed {
  box-shadow: 0 0.1rem 0 #161616;
  transform: translateY(0.15rem);
}

button:focus-visible {
  outline: 0.22rem solid #161616;
  outline-offset: 0.35rem;
}

output {
  min-width: 4.2ch;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
  font-size: clamp(2.6rem, 13vw, 5.5rem);
  font-weight: 720;
  line-height: 1;
  letter-spacing: 0.035em;
  font-variant-numeric: tabular-nums;
}

output.refresh {
  animation: refresh 180ms ease-out;
}

@keyframes refresh {
  from { opacity: 0.25; transform: translateY(0.12em); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 23rem) {
  main {
    gap: 1rem;
  }

  button {
    width: 6rem;
    font-size: 0.78rem;
  }

  output {
    font-size: 2.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  button,
  output {
    transition: none;
    animation: none !important;
  }
}