:root {
  --bg: #0a0712;
  --panel: rgba(22, 18, 35, 0.92);
  --text: #f4f0ff;
  --muted: #b8a9d4;
  --line: rgba(168, 85, 247, 0.28);
  --accent: #c084fc;
  --accent-hot: #f472b6;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Manrope", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 120% 70% at 50% -15%, rgba(168, 85, 247, 0.32), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 50%, rgba(244, 114, 182, 0.1), transparent 45%);
}

.game-header {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 7, 18, 0.82);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.game-header-inner {
  width: min(960px, 92vw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.game-title {
  font-family: "Unbounded", sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent);
}

main {
  width: min(960px, 92vw);
  margin: 0 auto;
  padding: 1.75rem 0 3rem;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding: 0.65rem 1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.hud-stat {
  font-size: 0.9rem;
  color: var(--muted);
}

.hud-stat strong {
  color: var(--accent-hot);
  font-weight: 700;
}

.canvas-wrap,
.board-wrap {
  display: flex;
  justify-content: center;
  margin: 0 auto;
}

canvas.game-canvas {
  display: block;
  max-width: 100%;
  width: auto;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #120e1c;
  touch-action: none;
  margin-left: auto;
  margin-right: auto;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  justify-content: center;
}

.btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  color: var(--bg);
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  transition: filter 0.2s, transform 0.15s;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn:active {
  transform: scale(0.98);
}

.hint {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}

.overlay-msg {
  text-align: center;
  padding: 0.75rem;
  margin-top: 0.75rem;
  border-radius: 10px;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid var(--line);
  font-size: 0.95rem;
  display: none;
}

.overlay-msg.visible {
  display: block;
}

/* Hub cards */
.hub-hero {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
}

.hub-hero h1 {
  font-family: "Unbounded", sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin-bottom: 0.65rem;
  background: linear-gradient(135deg, #fff, var(--accent), var(--accent-hot));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hub-hero p {
  color: var(--muted);
  max-width: 32rem;
  margin: 0 auto;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  padding-bottom: 3rem;
}

.hub-card {
  display: block;
  padding: 1.35rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.hub-card:hover {
  transform: translateY(-3px);
  border-color: rgba(192, 132, 252, 0.55);
  box-shadow: 0 16px 40px -18px rgba(168, 85, 247, 0.55);
}

.hub-card h2 {
  font-family: "Unbounded", sans-serif;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.hub-card p {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

.hub-card .play {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-hot);
}

.hub-icon {
  font-size: 1.75rem;
  line-height: 1;
  margin-bottom: 0.65rem;
  filter: grayscale(0.2);
}