* {
  box-sizing: border-box;
}

:root {
  --bg-a: #060f1b;
  --bg-b: #17344f;
  --panel: rgba(3, 10, 21, 0.82);
  --panel-border: rgba(174, 212, 245, 0.45);
  --text: #f2f8ff;
  --accent-a: #4fd7ff;
  --accent-b: #ffd166;
}

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--text);
  font-family: "Courier New", monospace;
  background:
    radial-gradient(1200px 550px at 8% 0%, rgba(101, 194, 255, 0.22), transparent 68%),
    radial-gradient(1100px 620px at 95% 100%, rgba(255, 162, 81, 0.24), transparent 70%),
    linear-gradient(140deg, var(--bg-a), var(--bg-b));
}

.app {
  width: min(1020px, 98vw);
  margin: 8px auto;
  display: grid;
  gap: 8px;
}

.hud {
  display: none;
  gap: 8px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.chip {
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  padding: 8px 10px;
  display: grid;
  backdrop-filter: blur(6px);
}

.chip span {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #b8d9f5;
}

.chip strong {
  font-size: 19px;
  color: #ffffff;
}

.stage {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(162, 223, 255, 0.35);
  box-shadow:
    0 10px 26px rgba(0, 0, 0, 0.5),
    inset 0 0 16px rgba(89, 196, 255, 0.06);
}

canvas {
  width: 100%;
  height: auto;
  display: block;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  justify-items: center;
  align-content: center;
  text-align: center;
  gap: 10px;
  padding: 16px;
  background: rgba(3, 10, 18, 0.45);
}

.overlay.hidden {
  display: none;
}

.overlay h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: 0.03em;
  text-shadow:
    0 0 8px rgba(79, 215, 255, 0.62);
}

.overlay p {
  margin: 0;
  max-width: 680px;
  font-size: clamp(12px, 1.5vw, 17px);
  color: #e6f4ff;
}

.overlay-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  border: none;
  border-radius: 4px;
  padding: 9px 18px;
  font-size: 16px;
  font-weight: 700;
  color: #0a1b2d;
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b));
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

button.ghost {
  color: #dff3ff;
  background: rgba(107, 179, 237, 0.22);
  border: 1px solid rgba(190, 231, 255, 0.6);
}

.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 12px;
  color: #a8bfd6;
}

.controls p {
  margin: 0;
}

kbd {
  display: inline-block;
  min-width: 24px;
  text-align: center;
  margin: 0 2px;
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid rgba(216, 238, 255, 0.55);
  background: rgba(7, 13, 23, 0.78);
  font-size: 12px;
}

@media (max-width: 780px) {
  .hud {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .controls {
    justify-content: flex-start;
    padding-inline: 4px;
  }
}

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

/* Library release: make the bundled music attribution reachable. */
.game-music-credits { position:fixed; z-index:20001; right:9px; top:calc(env(safe-area-inset-top, 0px) + 4px); color:#e7f5ff; background:rgba(2,9,21,.8); padding:4px 7px; border-radius:6px; font:11px/1.3 system-ui,sans-serif; text-decoration:underline; }
.game-music-credits:focus-visible { outline:2px solid #83dcff; outline-offset:3px; }