:root{
  --bg:#070911;
  --bg2:#0d1120;
  --panel:#101528;
  --panel-border:#232a45;
  --cyan:#00e5ff;
  --pink:#ff2e88;
  --purple:#7c4dff;
  --yellow:#ffd23f;
  --text:#e8ecff;
  --text-dim:#8a90b3;
  --radius:16px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(124,77,255,.25), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(0,229,255,.15), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

a{color:inherit;text-decoration:none;}

.font-display{font-family:'Orbitron',sans-serif;}

/* ---------- Nav ---------- */
.topnav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:22px 6vw;
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter:blur(10px);
  background:rgba(7,9,17,.55);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.brand{
  font-family:'Orbitron',sans-serif;
  font-weight:800;
  font-size:1.25rem;
  letter-spacing:.08em;
  display:flex;
  align-items:center;
  gap:.5em;
}
.brand .dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 12px 3px var(--cyan);
}
.brand span.hi{
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.nav-links{display:flex;gap:28px;font-size:.9rem;color:var(--text-dim);}
.nav-links a{transition:color .2s;}
.nav-links a:hover{color:var(--cyan);}

/* ---------- Hero ---------- */
.hero{
  padding:8vh 6vw 6vh;
  text-align:center;
}
.hero h1{
  font-family:'Orbitron',sans-serif;
  font-size:clamp(2.2rem,6vw,4.2rem);
  font-weight:900;
  margin:0 0 .3em;
  line-height:1.05;
  background:linear-gradient(100deg,#fff 10%,var(--cyan) 45%,var(--purple) 75%,var(--pink) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  text-shadow:0 0 60px rgba(0,229,255,.25);
}
.hero p{
  color:var(--text-dim);
  font-size:1.05rem;
  max-width:560px;
  margin:0 auto;
}

/* ---------- Game grid ---------- */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:26px;
  padding:2vh 6vw 10vh;
  max-width:1200px;
  margin:0 auto;
  width:100%;
}
.card{
  position:relative;
  background:linear-gradient(160deg,var(--panel),rgba(16,21,40,.4));
  border:1px solid var(--panel-border);
  border-radius:var(--radius);
  padding:28px 24px;
  overflow:hidden;
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  isolation:isolate;
}
.card::before{
  content:"";
  position:absolute;inset:0;
  z-index:-1;
  background:radial-gradient(240px 160px at 20% 0%, var(--glow,var(--cyan)) , transparent 70%);
  opacity:0;
  transition:opacity .3s ease;
}
.card:hover{
  transform:translateY(-6px);
  border-color:rgba(255,255,255,.18);
  box-shadow:0 20px 40px -20px rgba(0,0,0,.6);
}
.card:hover::before{opacity:.18;}
.card .icon{
  width:56px;height:56px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.8rem;
  margin-bottom:18px;
  background:linear-gradient(135deg, var(--glow,var(--cyan)), transparent);
  box-shadow:0 0 30px -6px var(--glow,var(--cyan));
}
.card h3{
  font-family:'Orbitron',sans-serif;
  margin:0 0 8px;
  font-size:1.15rem;
  letter-spacing:.02em;
}
.card p{
  color:var(--text-dim);
  font-size:.9rem;
  line-height:1.5;
  margin:0 0 20px;
  min-height:42px;
}
.play-btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.85rem;
  font-weight:600;
  padding:10px 18px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--glow,var(--cyan)),rgba(255,255,255,.05));
  color:#04060c;
  transition:transform .2s ease, filter .2s ease;
}
.card:hover .play-btn{transform:translateX(3px);filter:brightness(1.1);}

/* ---------- Footer ---------- */
footer{
  text-align:center;
  padding:28px;
  color:var(--text-dim);
  font-size:.8rem;
  border-top:1px solid rgba(255,255,255,.06);
}
footer .heart{color:var(--pink);}

/* ---------- Game page shell ---------- */
.game-shell{
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:24px 4vw 60px;
  flex:1;
}
.game-header{
  width:100%;
  max-width:760px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:18px;
}
.back-link{
  font-size:.85rem;
  color:var(--text-dim);
  display:flex;
  align-items:center;
  gap:6px;
  transition:color .2s;
}
.back-link:hover{color:var(--cyan);}
.game-title{
  font-family:'Orbitron',sans-serif;
  font-size:1.4rem;
  letter-spacing:.05em;
}
.hud{
  display:flex;
  gap:22px;
  width:100%;
  max-width:760px;
  margin-bottom:14px;
  font-family:'Orbitron',sans-serif;
  font-size:.85rem;
  color:var(--text-dim);
}
.hud b{color:var(--text);font-size:1rem;}
.hud .pill{
  background:var(--panel);
  border:1px solid var(--panel-border);
  padding:8px 16px;
  border-radius:10px;
}

.stage-wrap{
  position:relative;
  border-radius:var(--radius);
  padding:3px;
  background:linear-gradient(135deg,var(--cyan),var(--purple),var(--pink));
  box-shadow:0 25px 60px -20px rgba(0,0,0,.7);
}
canvas{
  display:block;
  background:#050710;
  border-radius:calc(var(--radius) - 3px);
  touch-action:none;
  max-width:100%;
  height:auto;
}

.overlay{
  position:absolute;inset:3px;
  border-radius:calc(var(--radius) - 3px);
  background:rgba(5,7,16,.86);
  backdrop-filter:blur(3px);
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:14px;
  text-align:center;
  padding:20px;
}
.overlay.hidden{display:none;}
.overlay h2{
  font-family:'Orbitron',sans-serif;
  font-size:1.6rem;
  margin:0;
  background:linear-gradient(90deg,var(--cyan),var(--pink));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.overlay p{color:var(--text-dim);margin:0;font-size:.9rem;}
.btn{
  border:none;
  cursor:pointer;
  font-family:'Orbitron',sans-serif;
  font-weight:700;
  font-size:.85rem;
  letter-spacing:.04em;
  padding:12px 26px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--cyan),var(--purple));
  color:#04060c;
  transition:transform .15s ease, filter .15s ease;
}
.btn:hover{transform:translateY(-2px);filter:brightness(1.1);}
.btn:active{transform:translateY(0);}

.help-text{
  margin-top:16px;
  color:var(--text-dim);
  font-size:.8rem;
  text-align:center;
  max-width:520px;
}

.touch-controls{
  display:none;
  gap:14px;
  margin-top:18px;
}
@media (max-width:640px){
  .touch-controls{display:flex;}
}
.tbtn{
  width:56px;height:56px;
  border-radius:14px;
  background:var(--panel);
  border:1px solid var(--panel-border);
  color:var(--text);
  font-size:1.4rem;
  display:flex;align-items:center;justify-content:center;
  user-select:none;
}
.tbtn:active{background:var(--purple);}