:root {
  --bg: #0d1023;
  --surface: #151a33;
  --text: #e7eafc;
  --muted: #a8b0d8;
  --accent: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #1b2752 0%, var(--bg) 56%, #080b17 100%);
  min-height: 100vh;
}
.container { max-width: 860px; margin: 0 auto; padding: 20px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.topbar a { color: var(--accent); text-decoration: none; font-weight: 700; }
.topbar h1 { margin: 0; font-size: 2rem; }
.hud {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  background: var(--surface);
  border: 1px solid #2a3360;
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 12px;
}
.hud p { margin: 0; color: var(--muted); }
button {
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 8px 12px;
  cursor: pointer;
}
canvas {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid #2a3360;
  background: #090d20;
}
.status { color: var(--muted); margin-top: 10px; }
@media (max-width: 680px) {
  .hud { grid-template-columns: 1fr 1fr; }
  button { grid-column: span 2; }
}