:root {
  color-scheme: dark;
  --bg: #0d1028;
  --panel: rgba(255, 255, 255, 0.09);
  --line: rgba(255, 255, 255, 0.18);
  --text: #fff7db;
  --muted: #c9c1ee;
  --gold: #ffd36e;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 211, 110, 0.22), transparent 28rem),
    radial-gradient(circle at 85% 20%, rgba(115, 196, 255, 0.2), transparent 24rem),
    linear-gradient(180deg, #141948, var(--bg));
}

.shell {
  width: min(100%, 980px);
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 14px max(18px, env(safe-area-inset-bottom));
}

.topline {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}

.back {
  flex: none;
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: var(--panel);
}

.kicker {
  margin: 0 0 3px;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 900;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 4.2rem);
  line-height: 0.95;
}

.game-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.34);
}

#game {
  width: 100%;
  min-height: min(74vh, 620px);
  touch-action: none;
}

#game canvas {
  display: block;
  width: 100% !important;
  height: auto !important;
}

.help {
  padding: 14px 16px 16px;
  color: var(--muted);
  line-height: 1.45;
}

.help strong { color: var(--text); }