/* MicroTower UI — dark "control room" chrome so the tower canvas is the star */
:root {
  --bg: #14151c;
  --panel: #1e2029;
  --panel-edge: #2c2f3d;
  --ink: #e8eaf2;
  --ink-dim: #8b90a3;
  --accent: #ffd257;   /* elevator-cab yellow */
  --ok: #4caf50;
  --bad: #ff5d5d;
  --mono: "Courier New", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body {
  display: flex; flex-direction: column;
  background: var(--bg); color: var(--ink);
  font: 14px/1.4 system-ui, sans-serif;
  overflow: hidden;
}

/* ---------- top HUD ---------- */
#hud {
  display: flex; align-items: center; gap: 20px;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 2px solid var(--panel-edge);
  user-select: none;
}
.brand { font-weight: 800; letter-spacing: 2px; }
.brand span { color: var(--accent); }
.hud-group { display: flex; flex-direction: column; }
.hud-group label { font-size: 10px; text-transform: uppercase; letter-spacing: 1px; color: var(--ink-dim); }
.hud-group span { font-family: var(--mono); font-size: 16px; }
#hud-stars { color: var(--accent); }
.hud-group.right { margin-left: auto; flex-direction: row; gap: 8px; }
.hud-btn {
  background: var(--panel-edge); color: var(--ink);
  border: 1px solid #3a3e50; border-radius: 4px;
  padding: 6px 12px; cursor: pointer;
}
.hud-btn:hover { border-color: var(--accent); }

#speeds { flex-direction: row; gap: 4px; align-items: center; }
.spd-btn {
  background: var(--panel-edge); color: var(--ink-dim);
  border: 1px solid #3a3e50; border-radius: 4px;
  width: 40px; padding: 5px 0; cursor: pointer; font-family: var(--mono);
}
.spd-btn.active { background: var(--accent); color: #1a1a1a; border-color: var(--accent); }

/* ---------- stage ---------- */
#stage { position: relative; flex: 1; min-height: 0; }
#game { width: 100%; height: 100%; display: block; cursor: crosshair; }

#msgbar {
  position: absolute; left: 12px; bottom: 12px;
  max-width: 60%;
  background: rgba(20, 21, 28, 0.85);
  border: 1px solid var(--panel-edge);
  border-left: 3px solid var(--accent);
  padding: 8px 12px; border-radius: 4px;
  font-family: var(--mono); font-size: 13px;
  pointer-events: none;
}
#msgbar.flash { animation: flash 0.5s ease-out; }
@keyframes flash { from { border-left-color: var(--bad); background: rgba(60, 30, 30, 0.9); } }
@media (prefers-reduced-motion: reduce) { #msgbar.flash { animation: none; } }

/* ---------- toolbar ---------- */
#toolbar {
  display: flex; gap: 6px; align-items: stretch;
  padding: 8px 12px; overflow-x: auto;
  background: var(--panel);
  border-top: 2px solid var(--panel-edge);
}
.tb-sep { width: 2px; background: var(--panel-edge); margin: 2px 6px; }
.tb-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  min-width: 84px; padding: 6px 8px;
  background: var(--panel-edge); color: var(--ink);
  border: 1px solid #3a3e50; border-radius: 6px;
  cursor: pointer; font-size: 12px;
}
.tb-btn small { color: var(--ink-dim); font-family: var(--mono); font-size: 10px; }
.tb-btn canvas { image-rendering: pixelated; border-radius: 2px; }
.tb-btn:hover { border-color: var(--accent); }
.tb-btn.active { outline: 2px solid var(--accent); background: #2a2410; }
.tb-btn.locked { opacity: 0.35; cursor: not-allowed; }
.tb-btn:focus-visible { outline: 2px solid var(--accent); }

#helpbar {
  padding: 4px 12px; font-size: 11px; color: var(--ink-dim);
  background: var(--panel); border-top: 1px solid var(--panel-edge);
}
#helpbar b { color: var(--ink); }