*{box-sizing:border-box}
:root{
--bg:#08131f;
--cyan:#57f0ff;
--blue:#368dff;
--purple:#8b5cff;
--pink:#ff4ecb;
--gold:#ffd96a;
--white:#fff;
--text:#dbf6ff;
}

html,body{
margin:0;
min-height:100%;
font-family:Arial,sans-serif;
background:
radial-gradient(circle at top,#16345c,#08131f 60%);
color:var(--text);
overflow-x:hidden;
}

body:before{
content:"";
position:fixed;
inset:0;
pointer-events:none;
background:
radial-gradient(circle at 15% 20%,rgba(87,240,255,.16),transparent 12%),
radial-gradient(circle at 82% 12%,rgba(255,78,203,.16),transparent 14%),
linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
background-size:auto,auto,50px 50px;
}

.topbar{
position:sticky;
top:0;
z-index:10;
display:flex;
justify-content:space-between;
align-items:center;
padding:14px;
background:rgba(8,19,31,.82);
backdrop-filter:blur(12px);
border-bottom:2px solid rgba(87,240,255,.16);
}

.logo{
font-weight:900;
font-size:14px;
text-decoration:none;
color:var(--cyan);
letter-spacing:1px;
}

nav{
display:flex;
gap:8px;
}

nav a{
text-decoration:none;
color:#a8dfff;
font-size:13px;
font-weight:900;
padding:8px 10px;
border-radius:999px;
}

nav a.active{
background:linear-gradient(135deg,var(--cyan),var(--pink));
color:#09131e;
}

.wrap{
max-width:540px;
margin:0 auto;
padding:18px 12px 40px;
}

.hidden{display:none!important}

.intro{
min-height:calc(100vh - 70px);
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
text-align:center;
gap:18px;
}

.hero{
width:130px;
height:130px;
border-radius:32px;
display:grid;
place-items:center;
font-size:72px;
background:
linear-gradient(145deg,var(--blue),var(--purple),var(--pink));
border:4px solid rgba(255,255,255,.22);
box-shadow:
0 16px 0 rgba(0,0,0,.25),
0 0 35px rgba(87,240,255,.28);
animation:float 1.8s infinite ease-in-out;
}

@keyframes float{
50%{transform:translateY(-10px) rotate(4deg)}
}

h1{
margin:0;
font-size:clamp(40px,12vw,68px);
line-height:.9;
color:var(--cyan);
text-shadow:0 4px 0 #17325a;
}

p{
margin:0;
max-width:360px;
line-height:1.6;
font-size:16px;
color:#c6e9ff;
}

button{
border:none;
cursor:pointer;
font-family:inherit;
font-weight:900;
}

.primary,.restart{
padding:16px 34px;
border-radius:22px;
background:linear-gradient(135deg,#fff,var(--cyan),var(--pink));
color:#08131f;
font-size:16px;
box-shadow:0 8px 0 #224f91;
}

button:active{
transform:translateY(4px);
box-shadow:0 3px 0 #224f91;
}

.stats{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:8px;
margin-bottom:12px;
}

.stats div{
background:rgba(255,255,255,.06);
border:2px solid rgba(87,240,255,.16);
border-radius:18px;
padding:10px;
text-align:center;
}

.stats span{
display:block;
font-size:12px;
color:#9fdfff;
font-weight:900;
}

.stats b{
font-size:22px;
color:var(--cyan);
}

.arena-shell{
padding:10px;
border-radius:28px;
background:linear-gradient(145deg,var(--blue),var(--purple),var(--pink));
box-shadow:0 14px 0 rgba(0,0,0,.22);
}

.board{
display:grid;
grid-template-columns:repeat(8,1fr);
gap:5px;
padding:7px;
height:min(88vw,500px);
border-radius:22px;
background:#0c1b2c;
}

.tile{
border-radius:14px;
display:grid;
place-items:center;
font-size:clamp(18px,6vw,32px);
background:linear-gradient(145deg,#12253d,#0d1a2a);
border:1px solid rgba(255,255,255,.06);
}

.wall{
background:repeating-linear-gradient(
45deg,
#57f0ff 0 8px,
#ff4ecb 8px 16px
);
}

.collect{
background:radial-gradient(circle,#fff,#57f0ff,#8b5cff);
box-shadow:0 0 18px rgba(87,240,255,.55);
}

.enemy{
background:radial-gradient(circle,#fff,#ff4ecb,#2a0933);
box-shadow:0 0 18px rgba(255,78,203,.55);
}

.goal{
background:radial-gradient(circle,#fff,#ffd96a,#57f0ff);
box-shadow:0 0 20px rgba(255,217,106,.7);
}

.player{
background:radial-gradient(circle,#fff,#57f0ff,#368dff);
box-shadow:0 0 22px rgba(87,240,255,.75);
}

.message{
margin:12px 0;
padding:12px;
border-radius:18px;
background:rgba(255,255,255,.06);
text-align:center;
font-weight:900;
}

.controls{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:10px;
max-width:300px;
margin:0 auto;
}

.controls button{
height:64px;
border-radius:20px;
background:linear-gradient(#fff,var(--cyan),var(--pink));
font-size:28px;
color:#08131f;
box-shadow:0 7px 0 #224f91;
}

.controls button:nth-child(1){grid-column:2}
.controls button:nth-child(2){grid-column:1}
.controls button:nth-child(3){grid-column:2}
.controls button:nth-child(4){grid-column:3}

.restart{
width:100%;
margin-top:12px;
}

.page{
max-width:760px;
margin:0 auto;
padding:30px 18px 70px;
}

.card{
background:rgba(255,255,255,.06);
border:2px solid rgba(87,240,255,.14);
border-radius:22px;
padding:22px;
margin:16px 0;
}

.card h1,.card h2{
color:var(--cyan);
}

footer{
text-align:center;
padding:24px;
font-size:13px;
color:#bcecff;
}

@media(max-width:390px){
.topbar{flex-direction:column}
.controls button{height:58px}
}




.back-lobby{
position:fixed;
left:12px;
bottom:12px;
z-index:9999;
display:inline-flex;
align-items:center;
gap:7px;
padding:11px 14px;
border-radius:999px;
background:linear-gradient(135deg,#fff,#ffd15c,#ff4ecb);
color:#17091e!important;
font-family:Arial,sans-serif;
font-size:13px;
font-weight:900;
text-decoration:none!important;
box-shadow:0 7px 0 rgba(0,0,0,.28),0 0 22px rgba(255,78,203,.35);
border:1px solid rgba(255,255,255,.45);
}
.back-lobby:active{
transform:translateY(4px);
box-shadow:0 3px 0 rgba(0,0,0,.28);
}