:root {
  --bg: #08090b;
  --panel: #12161c;
  --panel-strong: #171b22;
  --line: #303946;
  --text: #eee7d7;
  --muted: #b8b0a3;
  --danger: #a3283a;
  --danger-strong: #d83c54;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  width: min(1100px, calc(100vw - 32px));
}

.hud-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 24px;
  align-items: end;
  margin-bottom: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.eyebrow {
  margin: 0;
  color: var(--danger-strong);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 4rem;
  line-height: 0.95;
}

h2 {
  margin-bottom: 12px;
  font-size: 3rem;
}

p {
  color: var(--muted);
  line-height: 1.55;
}

button {
  font: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.text-link {
  color: var(--muted);
  font-weight: 700;
  text-decoration: none;
}

.text-link:focus-visible,
.text-link:hover {
  color: var(--text);
  outline: none;
}

.hud-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.hud-side {
  display: grid;
  justify-items: end;
  gap: 10px;
}

.language-controls {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0c1015;
}

.language-controls button {
  min-width: 42px;
  min-height: 32px;
  border: 1px solid transparent;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.language-controls button[aria-pressed="true"] {
  border-color: var(--danger-strong);
  background: var(--danger);
  color: var(--text);
}

.language-controls button:hover,
.language-controls button:focus-visible {
  border-color: var(--danger-strong);
  color: var(--text);
  outline: none;
}

.hud-stats p {
  min-width: 120px;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--text);
  font-weight: 700;
  text-align: center;
}

.game-wrap {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #030304;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  outline: none;
}

canvas:focus-visible {
  box-shadow: inset 0 0 0 3px var(--danger-strong);
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 24px;
  background: rgba(8, 9, 11, 0.82);
  text-align: center;
}

.overlay[hidden] {
  display: none;
}

.overlay h2 {
  color: var(--text);
}

.overlay p {
  max-width: 520px;
  margin-bottom: 10px;
}

.audio-note {
  color: var(--danger-strong);
  font-weight: 700;
}

.level-select {
  display: grid;
  gap: 8px;
  justify-items: center;
  margin: 6px 0 4px;
}

.level-select p {
  margin: 0;
  color: var(--text);
  font-size: 0.86rem;
  font-weight: 800;
  text-transform: uppercase;
}

.level-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.overlay button {
  min-width: 132px;
  min-height: 44px;
  margin-top: 10px;
  border: 1px solid var(--danger-strong);
  border-radius: 6px;
  background: var(--danger);
  color: var(--text);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.level-buttons button {
  min-width: 92px;
  min-height: 36px;
  margin-top: 0;
  border-color: var(--line);
  border-radius: 6px;
  background: #0c1015;
  color: var(--muted);
  font-size: 0.9rem;
}

.level-buttons button[aria-pressed="true"] {
  border-color: var(--danger-strong);
  background: #2a1118;
  color: var(--text);
}

.overlay button:hover,
.overlay button:focus-visible {
  background: var(--danger-strong);
}

.overlay button:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 3px;
}

.status-text {
  min-height: 1.6em;
  margin: 14px 0 0;
  color: var(--text);
  font-weight: 700;
}

.audio-demo-shell {
  width: min(920px, calc(100vw - 32px));
}

.demo-console {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(9, 11, 14, 0.94);
}

.demo-readout {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.demo-meter {
  height: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #07090c;
}

.demo-meter span {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #6b7a72, var(--danger), var(--danger-strong));
  transition: width 160ms ease;
}

.demo-controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.demo-controls button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-strong);
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
}

.demo-controls button:hover,
.demo-controls button:focus-visible {
  border-color: var(--danger-strong);
  background: #252b34;
  outline: none;
}

@media (max-width: 720px) {
  body {
    padding: 16px 0;
  }

  .shell {
    width: min(100vw - 20px, 1100px);
  }

  .hud-panel {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 2rem;
  }

  .hud-stats {
    justify-content: stretch;
  }

  .hud-side {
    justify-items: stretch;
  }

  .language-controls {
    justify-self: start;
  }

  .hud-stats p {
    flex: 1 1 130px;
  }

  .demo-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .overlay {
    padding: 16px;
  }
}