:root {
  --bg: #070914;
  --panel: rgba(255, 255, 255, 0.06);
  --panel2: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.9);
  --muted: rgba(255, 255, 255, 0.55);
  --accent: rgba(75, 255, 210, 0.95);
  --danger: rgba(255, 85, 125, 0.95);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 700px at 30% 20%, #101a3a 0%, transparent 60%),
              radial-gradient(900px 600px at 70% 60%, #1a1042 0%, transparent 55%),
              var(--bg);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  display: grid;
  place-items: center;
  padding: 28px;
}

.wrap {
  width: min(960px, 100%);
  display: grid;
  gap: 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.4px;
}

.sub {
  margin: 6px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.stats {
  display: flex;
  gap: 10px;
  align-items: center;
}

.pill {
  background: var(--panel2);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 999px;
  padding: 10px 12px;
  display: grid;
  gap: 2px;
  min-width: 90px;
  text-align: center;
}
.pill span { font-size: 11px; color: var(--muted); }
.pill b { font-size: 16px; }

.board {
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

canvas {
  width: min(560px, 100%);
  height: auto;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.10);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
}

.hud {
  width: min(560px, 100%);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.hint b {
  display: block;
  font-size: 14px;
}
.hint small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.buttons {
  display: flex;
  gap: 10px;
}

button {
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.07);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.06s ease, background 0.2s ease, border 0.2s ease;
}
button:hover {
  background: rgba(255,255,255,0.10);
  border-color: rgba(255,255,255,0.22);
}
button:active { transform: translateY(1px); }

.footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  padding: 0 6px;
}
.muted { opacity: 0.8; }