*{box-sizing:border-box}
:root{
  --bg:#0b0b11;--panel:#131323;--panel-2:#1b1b33;--text:#f3f3f8;
  --accent:#ff7a00;--accent-2:#8a2be2;--good:#36d399;--bad:#ff5577;
}
html,body{height:100%;margin:0;background:linear-gradient(180deg,#0b0b11 0%,#1a1428 100%);color:var(--text);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,'Helvetica Neue',Arial;}
body.game-active{overflow:hidden;touch-action:none}
.app-header,.app-footer{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0.75rem 1rem;background:var(--panel);border-bottom:1px solid #222}
.app-footer{border-top:1px solid #222;border-bottom:none;flex-wrap:wrap}
.app-header h1{margin:0;font-size:1.25rem;letter-spacing:0.3px}
.top-links{display:flex;gap:.5rem;align-items:center;opacity:.85}
.top-links a{color:var(--text);text-decoration:none}.top-links .sep{opacity:.6}
.layout{display:grid;grid-template-columns:1fr;gap:1rem;max-width:1000px;margin:1rem auto;padding:0 1rem}
@media(min-width:900px){.layout{grid-template-columns:420px 1fr}}
.game-wrap{position:relative;background:var(--panel-2);border:1px solid #2a2a3a;border-radius:12px;padding:12px;display:flex;flex-direction:column;align-items:center}
canvas{width:100%;height:auto;border-radius:10px;background:#04060a;touch-action:none}
.hud{display:flex;gap:.75rem;align-items:center;justify-content:center;margin-top:.75rem;flex-wrap:wrap}
.hud .btn{margin-left:auto}
.btn{background:#262646;color:var(--text);border:1px solid #3a3a6a;border-radius:8px;padding:.5rem .8rem;cursor:pointer}
.btn.primary{background:linear-gradient(90deg,var(--accent),#ff3e7f);border-color:#000}
.btn.install{margin-left:auto}
.sidebar{background:var(--panel-2);border:1px solid #2a2a3a;border-radius:12px;padding:1rem;max-height:40vh;overflow-y:auto}
.highscores{margin:0;padding-left:1.25rem}
.highscores li{margin:.25rem 0;padding:.15rem .25rem;border-left:3px solid #333}
.highscores li:nth-child(1){border-color:gold}
.highscores li:nth-child(2){border-color:silver}
.highscores li:nth-child(3){border-color:#cd7f32}
.overlay{position:absolute;inset:12px;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;border-radius:10px}
.overlay.hidden{display:none}
.card{background:#111528;border:1px solid #2c2f4f;border-radius:12px;padding:1rem;max-width:360px;width:100%;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.card h2{margin-top:0}
.score-form{display:grid;gap:.5rem;margin:.5rem 0 1rem}
.score-form input{background:#0b0f22;color:var(--text);border:1px solid #2d355a;border-radius:8px;padding:.6rem}
.actions{display:flex;justify-content:center}
#btn-sound[aria-pressed="true"]{outline:2px solid var(--accent)}
.app-footer small{opacity:.7}
.hidden{display:none}
@media(max-width:900px){.layout{grid-template-columns:1fr}.sidebar{order:3;margin-top:1rem}}
.fg-logo{width:180px;height:auto;filter:drop-shadow(0 2px 18px rgba(255,122,0,.2));margin-bottom:.5rem}
.made-by{opacity:.7;font-size:.85rem;margin:.5rem 0 0}
.splash {
  position: fixed; inset: 0; background:#0b0b11;
  display:flex; align-items:center; justify-content:center;
  z-index: 9999; transition: opacity .8s ease;
}
.splash.hide { opacity: 0; pointer-events:none; }
.fg-logo-large { width:240px; height:auto; animation: fadeLogo 3s ease; }
@keyframes fadeLogo { 0%{opacity:0;transform:scale(.9);}50%{opacity:1;}100%{transform:scale(1);} }