:root {
  --bg: #080d19;
  --panel: #111a2d;
  --panel-2: #17233b;
  --text: #f4f7ff;
  --muted: #9ba9c4;
  --accent: #c99a52;
  --accent-2: #f1c779;
  --border: rgba(180, 198, 230, .13);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 28px 16px;
  display: grid;
  place-items: center;
  background: radial-gradient(ellipse at top, #172440, var(--bg) 60%);
  color: var(--text);
  font-family: Inter, Arial, sans-serif;
}

button {
  font: inherit;
  cursor: pointer;
}

.game-shell {
  width: min(100%, 560px);
}

.header {
  text-align: center;
  margin-bottom: 24px;
}

.eyebrow {
  color: var(--accent-2);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .22em;
  margin: 0 0 10px;
}

h1 {
  font-size: clamp(2.3rem, 8vw, 3.5rem);
  letter-spacing: -.06em;
  margin: 0;
}

h1 span {
  color: var(--accent-2);
}

.subtitle {
  color: var(--muted);
  font-size: .92rem;
  margin-top: 12px;
}

.scoreboard {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}

.score-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 18px;
}

.score-card span {
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
}

.score-card strong {
  font-size: 1.55rem;
  color: var(--accent-2);
}

.board-wrap {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(201, 154, 82, .35);
  box-shadow: 0 18px 60px #0005;
  background: #0d1627;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5, 10, 20, .68);
  backdrop-filter: blur(5px);
}

.overlay.hidden {
  display: none;
}

.overlay-card {
  text-align: center;
  max-width: 300px;
}

.overlay-card h2 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

.overlay-card p {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.6;
}

.primary-btn,
.secondary-btn {
  border: 0;
  border-radius: 11px;
  padding: 12px 20px;
  font-weight: 800;
  transition: transform .15s;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #1a1309;
}

.secondary-btn {
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
}

button:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.game-actions {
  display: flex;
  gap: 10px;
  margin: 14px 0 20px;
}

.game-actions button {
  flex: 1;
}

.controls {
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 15px;
  padding: 17px;
}

.control-title {
  color: var(--accent-2);
  font-size: .7rem;
  letter-spacing: .18em;
  font-weight: 800;
  margin: 0 0 10px;
}

.desktop-hint {
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.9;
  margin: 0;
}

.touch-controls {
  display: none;
  margin: 12px auto 0;
  width: 170px;
}

.touch-controls button {
  width: 50px;
  height: 45px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--accent-2);
  font-size: 1.1rem;
}

.touch-controls > button {
  display: block;
  margin: 0 auto 6px;
}

.middle-controls {
  display: flex;
  justify-content: center;
  gap: 6px;
}

footer {
  text-align: center;
  color: #72809a;
  font-size: .75rem;
  margin-top: 20px;
}

footer strong {
  color: var(--accent-2);
}

@media (max-width: 600px) {
  body {
    padding: 20px 12px;
  }

  .touch-controls {
    display: block;
  }

  .desktop-hint {
    font-size: .76rem;
  }
}