:root {
  --bg: #0b0b12;
  --fg: #f4f1ea;
  --muted: rgba(244, 241, 234, 0.45);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  overflow: hidden;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

main {
  position: fixed;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 0 16px;
  pointer-events: none;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 12vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.9;
  mix-blend-mode: difference;
}

.hint {
  margin: 1.5rem 0 0;
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: lowercase;
  color: var(--muted);
  transition: opacity 1.5s ease;
}

.hint.gone { opacity: 0; }

#sound {
  position: fixed;
  right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom, 0px));
  padding: 0.5rem 0.9rem;
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  background: rgba(11, 11, 18, 0.6);
  border: 1px solid var(--muted);
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(4px);
}

#sound:hover,
#sound[aria-pressed="true"] { color: var(--fg); border-color: var(--fg); }

#sound:focus-visible { outline: 2px solid var(--fg); outline-offset: 3px; }