:root {
  --bg: #0b1220;
  --panel: rgba(10, 18, 32, 0.82);
  --panel-border: rgba(148, 163, 184, 0.2);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #f97316;
  --accent-2: #22c55e;
  --danger: #ef4444;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(249, 115, 22, 0.25), transparent 30%),
    linear-gradient(180deg, #172554 0%, #0b1220 55%, #020617 100%);
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px;
  overflow: hidden;
}

.game-shell {
  width: min(100%, 980px);
  display: grid;
  gap: 16px;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.hud-item,
.controls,
.overlay {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hud-item {
  border-radius: 18px;
  padding: 14px 18px;
}

.hud-item .label {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.hud-item strong {
  font-size: 1.5rem;
}

.canvas-wrap {
  position: relative;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow);
}

canvas {
  display: block;
  width: 900px;
  max-width: 100%;
  height: auto;
  background:
    linear-gradient(180deg, rgba(30, 41, 59, 0.55), rgba(15, 23, 42, 0.95)),
    radial-gradient(circle at top, rgba(96, 165, 250, 0.16), transparent 40%);
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}

.overlay.hidden {
  display: none;
}

.overlay h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.8rem);
}

.overlay p {
  margin: 6px 0;
  max-width: 520px;
  color: var(--text);
}

button {
  margin-top: 18px;
  border: 0;
  border-radius: 999px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, var(--accent), #fb7185);
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
}

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

.controls {
  border-radius: 18px;
  padding: 14px 18px;
  color: var(--muted);
}

kbd {
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  color: var(--text);
}

@media (max-width: 640px) {
  body {
    padding: 14px;
  }

  .hud {
    grid-template-columns: 1fr;
  }

  .hud-item strong {
    font-size: 1.25rem;
  }
}