:root {
  --bg: #020202;
  --line: rgba(255,255,255,0.15);
  --pulse: rgba(0, 210, 255, 0.22);
  --player: #7afcff;
  --enemy: #ff5c5c;
  --enemy-alert: #ffcc5c;
  --text: #e7f7ff;
}
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #000;
  color: var(--text);
  font-family: "Segoe UI", sans-serif;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
}
.game-shell {
  display: grid;
  grid-template-columns: 900px auto;
  gap: 16px;
  padding: 16px;
}
canvas {
  border: 2px solid rgba(255,255,255,0.12);
  background: #000;
}
.hud {
  display: flex;
  flex-direction: column;
  gap: 12px;
  color: var(--text);
  max-width: 240px;
}
.hud div {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 10px;
  border-radius: 10px;
}
#alert {
  min-height: 42px;
  font-weight: 700;
}
.network-panel {
  display: flex;
  gap: 8px;
}
.network-panel input {
  flex: 1;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.05);
  color: var(--text);
}
.network-panel button {
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 8px;
  background: rgba(0, 210, 255, 0.12);
  color: var(--text);
  cursor: pointer;
}
.network-panel button:hover {
  background: rgba(0, 210, 255, 0.18);
}