:root {
  --bg1: #070a12;
  --bg2: #0c1630;
  --ink: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.62);
  --line: rgba(255, 255, 255, 0.1);
  --card: rgba(255, 255, 255, 0.06);
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--ink);
  background: radial-gradient(
      1200px 700px at 30% 20%,
      rgba(90, 180, 255, 0.16),
      transparent 60%
    ),
    radial-gradient(
      900px 600px at 70% 80%,
      rgba(180, 120, 255, 0.12),
      transparent 65%
    ),
    linear-gradient(180deg, var(--bg1), var(--bg2));
  display: flex;
  align-items: center;
  justify-content: center;
}

.page {
  width: min(980px, 92vw);
  padding: 22px;
}

.frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.02)
  );
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.score {
  position: absolute;
  top: 14px;
  left: 14px;
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
}

.score .label {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.score #score {
  font-size: 20px;
  font-weight: 700;
}

.hint {
  position: absolute;
  top: 16px;
  right: 14px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  backdrop-filter: blur(8px);
}