/* PigHero styles: clean, high-contrast, performant (no large images) */
:root{
  --bg:#0c0f14; --fg:#e7f2ff; --accent:#ff6388; --good:#7cf7b6; --warn:#ffd56b; --hp:#59d; --hpbg:#20324a;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:linear-gradient(180deg,#0c0f14,#131a24);color:var(--fg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,sans-serif}
#game{display:block;width:100%;height:auto;max-height:100vh;image-rendering:pixelated;background:
  radial-gradient(ellipse at center,rgba(255,255,255,.06),rgba(255,255,255,0) 60%),
  repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 2px,transparent 2px 10px),
  linear-gradient(180deg,#0a0e13,#0e131b)
}
#ui{position:fixed;inset:0;pointer-events:none}
#topbar{position:absolute;top:0;left:0;right:0;height:44px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:6px 10px;backdrop-filter:blur(6px);background:linear-gradient(180deg,rgba(20,24,32,.75),rgba(20,24,32,.25));border-bottom:1px solid rgba(255,255,255,.07);pointer-events:auto}
#topbar .left,#topbar .right{display:flex;align-items:center;gap:10px}
#topbar button{border:none;border-radius:8px;padding:6px 10px;background:#1e2633;color:var(--fg);cursor:pointer;box-shadow:0 0 0 1px rgba(255,255,255,.06) inset}
#topbar button:hover{background:#263144}
#topbar #levelLabel,#topbar #waveLabel{font-weight:700;letter-spacing:.5px}
.hpbar{width:240px;height:12px;border-radius:8px;background:var(--hpbg);box-shadow:0 0 0 1px rgba(255,255,255,.08) inset;overflow:hidden}
.hpbar__fill{height:100%;width:100%;background:linear-gradient(90deg,#59d,#84e);transition:width .15s ease}

.hidden{display:none}
#between,#gameover{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(ellipse at center,rgba(0,0,0,.55),rgba(0,0,0,.75));animation:fadeIn .2s ease}
.panel{pointer-events:auto;width:min(760px,92vw);background:#141a24;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:18px;box-shadow:0 18px 60px rgba(0,0,0,.4)}
.panel h2{margin:6px 0 12px 0}
.panel p{opacity:.85;margin:.25rem 0 .75rem}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.upg{padding:10px;border-radius:10px;background:#1a2230;border:1px solid rgba(255,255,255,.08);cursor:pointer;transition:transform .06s ease, background .2s}
.upg:hover{transform:translateY(-2px);background:#202a3b}
.upg .t{font-weight:700}
.upg .d{opacity:.9;font-size:.92rem}

#btnNext,#btnRetry{margin-top:10px;padding:10px 14px;border-radius:10px;border:0;background:var(--accent);color:white;font-weight:700;cursor:pointer}
#btnNext:hover,#btnRetry:hover{filter:brightness(1.05)}

@keyframes fadeIn{from{opacity:0}to{opacity:1}}