#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 6px 24px rgba(30, 32, 36, 0.18);
  color: var(--ink);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-1);
}

.hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  padding: max(0.75rem, env(safe-area-inset-top)) max(0.75rem, env(safe-area-inset-right)) max(0.75rem, env(safe-area-inset-bottom)) max(0.75rem, env(safe-area-inset-left));
}

.hud > * {
  pointer-events: auto;
}

.hud-tl {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  max-width: min(22rem, calc(100vw - 10.5rem));
  padding: 0.7rem 0.9rem;
}

.hud-tl h1 {
  font-size: 1.15rem;
  margin: 0 0 0.3rem;
}

#hud-hint {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0;
}

.hide-hint #hud-hint {
  display: none;
}

.hud-tr {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 9rem;
  padding: 0.4rem 0.5rem 0.5rem;
  text-align: center;
}

#gizmo {
  width: 96px;
  height: 96px;
  display: block;
  margin: 0 auto;
}

.grav {
  font-size: 0.75rem;
  line-height: 1.3;
  margin: 0;
  color: var(--ink-soft);
}

.grav b {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink);
}

#meter {
  position: absolute;
  left: 50%;
  bottom: 5.5rem;
  transform: translateX(-50%);
  width: min(26rem, calc(100vw - 1.5rem));
  padding: 0.6rem 0.8rem;
  text-align: center;
}

#meter[hidden] {
  display: none;
}

#meter .bar {
  position: relative;
  height: 8px;
  background: #c2bfb6;
  margin-bottom: 0.4rem;
}

#meter-fill {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: background 0.2s;
}

#meter-fill.ready {
  background: var(--accent-bright);
  box-shadow: 0 0 10px var(--accent-bright);
}

#meter .mark {
  position: absolute;
  left: 70%;
  top: -3px;
  bottom: -3px;
  width: 2px;
  background: var(--ink);
}

#meter-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.hud-bl {
  position: absolute;
  left: 0.75rem;
  bottom: 0.75rem;
  right: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  pointer-events: none;
}

.hud-bl .btn {
  pointer-events: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem 0.8rem;
  min-height: 2.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.btn:hover {
  border-color: var(--accent);
  background: #f6f4ef;
}

.btn.primary {
  background: var(--ink);
  color: #f1f0eb;
  border-color: var(--ink);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-inline: 1.4rem;
}

.btn.primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}

#stick {
  display: none;
  position: absolute;
  left: 1.5rem;
  bottom: 4.5rem;
  width: 8.5rem;
  height: 8.5rem;
  border-radius: 50%;
  background: rgba(236, 234, 228, 0.5);
  border: 2px solid rgba(6, 122, 140, 0.7);
  touch-action: none;
}

#stick-knob {
  position: absolute;
  left: calc(50% - 1.6rem);
  top: calc(50% - 1.6rem);
  width: 3.2rem;
  height: 3.2rem;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.85;
  pointer-events: none;
}

@media (pointer: coarse) {
  #stick {
    display: block;
  }

  .hud-bl {
    left: auto;
    justify-content: flex-end;
    flex-direction: column;
    align-items: flex-end;
    bottom: 0.75rem;
  }

  .hud-bl kbd {
    display: none;
  }

  #btn-mute {
    display: none;
  }

  #meter {
    bottom: 11rem;
  }
}

#toast {
  position: absolute;
  top: 38%;
  left: 50%;
  transform: translate(-50%, 0);
  max-width: min(30rem, calc(100vw - 2rem));
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: #f1f0eb;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
  opacity: 0;
  pointer-events: none;
}

#toast.show {
  animation: toast 3.2s ease both;
}

@keyframes toast {
  0% { opacity: 0; transform: translate(-50%, 8px); }
  10%, 80% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; }
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 1rem;
  overflow-y: auto;
  background: rgba(214, 217, 218, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

.overlay[hidden] {
  display: none;
}

.sheet {
  width: min(38rem, 100%);
  padding: 1.5rem 1.6rem;
  background: rgba(238, 236, 231, 0.96);
}

.sheet h2 {
  font-size: clamp(1.6rem, 6vw, 2.4rem);
}

.sheet > p {
  max-width: 60ch;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.2rem 0;
}

.levels {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.level-btn {
  justify-content: flex-start;
  gap: 0.8rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.level-btn .num {
  display: inline-grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  background: var(--ink);
  color: #f1f0eb;
  font-size: 0.9rem;
}

.level-btn.current {
  border-color: var(--accent);
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.4rem 1rem;
  margin: 0 0 1rem;
  font-size: 0.85rem;
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.controls div {
  display: flex;
  flex-direction: column;
}

.controls dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.controls dd {
  margin: 0;
}

.rule {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 0;
}

#nogl {
  position: fixed;
  left: 50%;
  top: 40%;
  transform: translate(-50%, -50%);
  padding: 1rem 1.4rem;
  z-index: 20;
}

#nogl[hidden] {
  display: none;
}

@media (max-width: 520px) {
  .hud-tl {
    max-width: calc(100vw - 10.5rem);
  }

  .hud-tl h1 {
    font-size: 1rem;
  }

  #hud-hint {
    font-size: 0.78rem;
  }
}