:root {
  --bg0: #030612;
  --bg1: #0b1230;
  --cyan: #33f3ff;
  --pink: #ff4bd8;
  --ink: #e6f0ff;
  --line: rgba(140, 166, 255, 0.25);
  --card: rgba(10, 16, 35, 0.7);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: radial-gradient(1000px 500px at 10% 10%, #14245a 0, transparent 50%),
              radial-gradient(900px 500px at 90% 90%, #320f46 0, transparent 50%),
              linear-gradient(160deg, var(--bg0), var(--bg1));
  overflow: hidden;
}
.bg-fx {
  position: fixed; inset: -20%;
  background:
    radial-gradient(circle at 20% 30%, rgba(51,243,255,.13), transparent 20%),
    radial-gradient(circle at 80% 70%, rgba(255,75,216,.14), transparent 22%);
  filter: blur(20px);
  pointer-events: none;
}
.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  padding: max(12px, env(safe-area-inset-top)) 12px max(12px, env(safe-area-inset-bottom));
  gap: 10px;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  backdrop-filter: blur(8px);
}
.topbar h1 {
  font: 900 clamp(1rem, 5.2vw, 1.5rem)/1.1 Orbitron, sans-serif;
  margin: 0;
  letter-spacing: 0.06em;
}
.sub { margin: 4px 0 0; font-size: 12px; opacity: .82; }
.top-actions { display: flex; gap: 8px; }
.btn {
  border: 1px solid #4d64c8;
  background: rgba(45, 66, 150, .45);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 12px;
  font-weight: 700;
}
.btn-ghost { background: rgba(20, 26, 54, .35); }
.hud-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.chip {
  flex: 1;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 10px;
  font: 700 12px/1 Orbitron, sans-serif;
  letter-spacing: .05em;
}
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; vertical-align: 1px; }
.dot.cyan { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.dot.pink { background: var(--pink); box-shadow: 0 0 12px var(--pink); }
.arena-wrap {
  min-height: 0;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 8px;
}
canvas#game {
  width: 100%;
  height: 100%;
  min-height: 52svh;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(3, 8, 20, 0.9);
  box-shadow: inset 0 0 80px rgba(31, 62, 170, 0.28), 0 20px 60px rgba(0, 0, 0, 0.45);
  touch-action: none;
}
.touch-hint {
  text-align: center;
  font-size: 12px;
  opacity: .78;
}
.footer {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  opacity: .8;
  padding: 0 2px;
}
@media (min-width: 900px) {
  .app-shell { max-width: 1100px; margin: 0 auto; padding-top: 16px; }
  canvas#game { min-height: 64svh; }
}