:root {
  color-scheme: dark;
  --bg: #06070e;
  --panel: #11172c;
  --line: #41507f;
  --text: #edf2ff;
  --muted: #a8b6e8;
  --accent: #7af7ff;
  --good: #8bff9a;
  --warn: #ffd08f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 12% -5%, #2f4178 0%, #0b1122 43%, #05060c 100%);
  display: flex;
  justify-content: center;
  padding: 1rem;
}

.app {
  width: min(980px, 100%);
  display: grid;
  gap: 0.85rem;
}

.hero,
.hud,
.stage,
.controls {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(19, 27, 50, 0.94), rgba(8, 12, 22, 0.96));
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.42), inset 0 0 0 1px rgba(180, 197, 255, 0.08);
}

.hero { padding: 0.95rem 1.1rem; }

.hero h1 {
  margin: 0;
  color: var(--accent);
  text-shadow: 0 0 15px rgba(122, 247, 255, 0.35);
  font-size: clamp(1.45rem, 2.8vw, 2rem);
}

.hero p {
  margin: 0.42rem 0 0;
  color: var(--muted);
}

.hud {
  padding: 0.7rem 0.9rem;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.hud div {
  border: 1px solid #34406b;
  border-radius: 10px;
  background: rgba(7, 11, 22, 0.76);
  padding: 0.52rem 0.58rem;
  display: grid;
  gap: 0.2rem;
}

.hud span {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #95a4d9;
}

.hud strong {
  font-size: 1.03rem;
  color: #f7fbff;
}

.stage {
  padding: 0.85rem;
}

canvas {
  width: 100%;
  max-width: 680px;
  height: auto;
  display: block;
  margin-inline: auto;
  border-radius: 12px;
  border: 1px solid #5f72af;
  background: radial-gradient(circle at center, #111a33 0%, #060a14 70%);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.44);
}

.status {
  margin: 0.7rem 0 0;
  text-align: center;
  color: var(--warn);
  min-height: 1.35rem;
}

.status.good {
  color: var(--good);
}

.controls {
  padding: 0.75rem;
  display: flex;
  gap: 0.6rem;
  justify-content: center;
}

button {
  border: 1px solid #5b70b5;
  border-radius: 10px;
  background: #19254e;
  color: #f0f6ff;
  font-weight: 700;
  padding: 0.62rem 1rem;
  cursor: pointer;
}

button:hover:not(:disabled) {
  filter: brightness(1.12);
}

button.primary {
  border-color: #9af8ff;
  background: linear-gradient(180deg, #2e93b4, #1c6282);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (max-width: 840px) {
  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}