:root{--bg:#1f2430;--panel:#2d3342;--text:#eaf3ff;--line:#46506b}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:monospace;-webkit-text-size-adjust:100%}
.wrap{max-width:980px;margin:0 auto;padding:16px}
.headerRow{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}
.titleCol{min-width:0;flex:1}
h1{margin:0 0 6px;line-height:1.1}
.subtitle{opacity:.9;margin:0}
.qrBox{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px;display:flex;flex-direction:column;align-items:center;gap:6px;min-width:158px}
.qrImg{width:150px;height:150px;object-fit:cover;border-radius:6px;background:#fff}
.qrText{font-size:12px;opacity:.95;text-align:center}
.hud{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:10px 0}
.hud>div,.result{background:var(--panel);border:1px solid var(--line);padding:8px;border-radius:8px}
#cityCanvas{width:100%;height:auto;max-width:940px;aspect-ratio:900/520;border:1px solid #5d6888;border-radius:8px;background:#0f1420;display:block;margin-top:10px;touch-action:none}
.controls{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:10px}
button{padding:12px;border-radius:8px;border:1px solid #5f6b8a;background:#36405a;color:#fff;font-size:15px;touch-action:manipulation}
input{padding:10px;border-radius:8px;border:1px solid #5f6b8a;background:#141a27;color:#fff}
.legend{margin-top:8px;opacity:.9}
.leaderboard{margin-top:10px;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px}
.hiddenPanel{display:none}
.leaderboard-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
#leaderboardList{margin:10px 0 0 18px;padding:0}
.submitStatus{opacity:.9;margin-top:6px;min-height:18px}
@media (max-width: 800px){
  .hud{grid-template-columns:repeat(2,minmax(0,1fr))}
  .controls{grid-template-columns:repeat(2,minmax(0,1fr))}
  .qrImg{width:150px;height:150px}
  .qrBox{min-width:158px;padding:6px}
  .qrText{font-size:11px}
}