:root {
  color-scheme: dark;
  --bg: #0d1116;
  --panel: #1d2733;
  --ink: #f1f8ff;
  --accent: #8df08c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Gill Sans", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 10% 0%, #26384a, var(--bg) 60%);
}

.wrap { max-width: 980px; margin: 0 auto; padding: 16px; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.top h1 { margin: 0; }
.top p { margin: 4px 0 0; opacity: 0.85; }

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  background: var(--accent);
  color: #0f2b0e;
}

.hud {
  margin: 12px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.hud div {
  background: var(--panel);
  border: 1px solid #33475b;
  border-radius: 12px;
  padding: 10px;
}

.hud span { display: block; font-size: 0.78rem; opacity: 0.78; }

.game-frame {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #33475b;
}

canvas { width: 100%; height: auto; display: block; background: #0c141d; }

.tip { opacity: 0.88; }

@media (max-width: 760px) {
  .hud { grid-template-columns: repeat(2, 1fr); }
}