:root {
  --ink: #d1d6e6;
  --dim: #b8bed1;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --text: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #0a0a0f;
  color: var(--ink);
  font-family: var(--text);
  -webkit-font-smoothing: antialiased;
}

#stage {
  display: block;
  position: fixed;
  inset: 0;
  touch-action: none;
  cursor: crosshair;
}

/* Readout, not a control. Faint enough to ignore, legible when wanted. */
#hud {
  position: fixed;
  left: 22px;
  bottom: 20px;
  margin: 0;
  z-index: 5;
  pointer-events: none;
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1.85;
  letter-spacing: 0.06em;
  color: var(--dim);
  opacity: 0.75;
  text-shadow: 0 0 12px rgba(0, 0, 0, 0.9);
}

#hud span {
  display: inline-block;
  width: 5.8em;
  color: #3a3a4a;
  text-transform: lowercase;
}

#veil {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 6vh 7vw;
  background: radial-gradient(120% 90% at 50% 45%, rgba(10, 10, 15, 0.78), rgba(10, 10, 15, 0.95));
  backdrop-filter: blur(3px);
  /* Opacity only. `visibility` is a discrete property, and transitioning it
     makes the show and hide directions fight over one delay — `esc` ends up
     looking dead for 1.6s and then popping the title in. Interactivity is
     already handled by pointer-events; the semantics ride on aria-hidden. */
  transition: opacity 1.6s cubic-bezier(0.37, 0, 0.63, 1);
  /* the first gesture belongs to the instrument, not to the legend */
  pointer-events: none;
}

#veil.gone {
  opacity: 0;
}

#veil .inner {
  max-width: 46rem;
  width: 100%;
}

#veil h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(2.1rem, 5.4vw, 3.5rem);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: #ffffff;
}

#veil .lede {
  margin: 0 0 2.4rem;
  max-width: 34rem;
  font-size: clamp(0.95rem, 1.5vw, 1.06rem);
  line-height: 1.62;
  color: #b8bed1;
}

.gestures {
  display: grid;
  grid-template-columns: minmax(9.5rem, max-content) 1fr;
  gap: 0.44rem 1.9rem;
  margin: 0 0 2.6rem;
  font-size: 12.5px;
  line-height: 1.5;
}

.gestures dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: #ff00e5;
  white-space: nowrap;
}

.gestures dd {
  margin: 0;
  color: #b8bed1;
}

#veil .go {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #1a7aff;
  animation: breathe 4.4s cubic-bezier(0.37, 0, 0.63, 1) infinite;
}

@keyframes breathe {
  0%,
  100% {
    opacity: 0.42;
  }
  50% {
    opacity: 1;
  }
}

@media (max-width: 620px) {
  .gestures {
    grid-template-columns: 1fr;
    gap: 0.1rem 0;
  }
  .gestures dd {
    margin-bottom: 0.5rem;
  }
}