/* Jump Tag — polished UI with glow */
:root{
  --bg:#0f1724;
  --card:#0b1220;
  --accent:#7c3aed;
  --accent-2:#06b6d4;
  --muted:#9aa4b2;
  --glow: 0 6px 30px rgba(124,58,237,0.18);
  --glass: rgba(255,255,255,0.03);
  --radius:14px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;background:linear-gradient(180deg,#071025 0%, #081426 60%);color:#e6eef6}
.game-shell{max-width:1200px;margin:28px auto;padding:22px;border-radius:18px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));box-shadow:var(--glow)}
.game-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,0.03)}
.title{display:flex;gap:14px;align-items:center}
.title .icon{font-size:36px;filter:drop-shadow(0 6px 12px rgba(124,58,237,0.15))}
.title h1{margin:0;font-size:20px;letter-spacing:0.2px}
.title p{margin:0;color:var(--muted);font-size:13px}
.controls{display:flex;gap:8px;align-items:center}
.btn{background:transparent;border:1px solid rgba(255,255,255,0.06);padding:8px 12px;border-radius:10px;color:#e6eef6;cursor:pointer;font-weight:600;backdrop-filter: blur(4px)}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));border:none;color:white;box-shadow:0 10px 30px rgba(6,182,212,0.06),0 4px 10px rgba(124,58,237,0.08);transform:translateZ(0)}
.btn.ghost{background:transparent;border:1px dashed rgba(255,255,255,0.06)}
.btn:disabled{opacity:0.4;cursor:not-allowed}

.game-area{padding:18px 0}
.hud{display:flex;gap:16px;align-items:center;color:var(--muted);margin-bottom:12px}
.hud .score{background:var(--glass);padding:8px 12px;border-radius:10px;font-size:13px;border:1px solid rgba(255,255,255,0.02)}

.arena-wrap{display:flex;gap:18px;align-items:flex-start}
canvas{border-radius:12px;background:
  linear-gradient(180deg, rgba(6,6,10,0.15), rgba(7,12,18,0.5));
  box-shadow: 0 12px 40px rgba(3,7,18,0.6), inset 0 1px 0 rgba(255,255,255,0.02);
  border:1px solid rgba(255,255,255,0.03);
  display:block;}

.legend{width:230px;background:linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02));padding:14px;border-radius:12px;border:1px solid rgba(255,255,255,0.03);color:var(--muted)}
.legend h3{margin:6px 0;font-size:14px}
.legend ul{padding-left:18px;margin:0}
.legend kbd{background:#081426;padding:4px 6px;border-radius:6px;border:1px solid rgba(255,255,255,0.03);font-weight:700}

.tips{margin-top:12px;color:var(--muted);font-size:13px}

/* HUD glow for big events */
.flash-win{animation:flashWin 1s ease forwards}
@keyframes flashWin{0%{box-shadow:none}50%{box-shadow:0 0 40px rgba(6,182,212,0.14)}100%{box-shadow:none}}

/* responsive */
@media (max-width:920px){
  .arena-wrap{flex-direction:column}
  .legend{width:100%}
  canvas{width:100%;height:auto}
}