@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700;900&display=swap');

*{box-sizing:border-box;margin:0;padding:0}

html,body{
  width:100%;
  height:100%;
  overflow:hidden;
  background:#02030a;
  color:white;
  font-family:'Space Grotesk',system-ui,sans-serif;
  touch-action:none;
}

body{display:flex;flex-direction:column}

.topbar{
  height:58px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 10px;
  background:rgba(0,0,0,.66);
  border-bottom:1px solid rgba(255,255,255,.08);
}

.title{
  font-weight:900;
  letter-spacing:1.5px;
  font-size:1rem;
}

.top-actions{display:flex;gap:7px}

.topbtn{
  border:none;
  background:#151c2f;
  color:white;
  padding:9px 11px;
  border-radius:14px;
  text-decoration:none;
  font-weight:900;
  cursor:pointer;
}

.hud{
  height:42px;
  display:flex;
  align-items:center;
  justify-content:space-around;
  background:#0a1020;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-weight:900;
}

canvas{
  flex:1;
  width:100%;
  height:100%;
  display:block;
  background:#02030a;
}

.overlay{
  position:fixed;
  inset:0;
  z-index:9999;
  display:none;
  align-items:center;
  justify-content:center;
  padding:20px;
  background:rgba(0,0,0,.58);
  backdrop-filter:blur(10px);
}

.overlay.show{display:flex}

.card{
  width:min(430px,100%);
  padding:24px;
  border-radius:26px;
  text-align:center;
  background:rgba(10,16,34,.86);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:0 30px 90px rgba(0,0,0,.6);
}

.card h1{
  font-size:2rem;
  margin-bottom:14px;
  font-weight:900;
}

.card p{
  opacity:.84;
  line-height:1.5;
  margin-bottom:18px;
}

.card button,.menuBtn{
  width:100%;
  border:none;
  background:linear-gradient(135deg,#29f2d4,#7c5cff);
  color:#061018;
  padding:14px;
  border-radius:18px;
  font-weight:900;
  font-size:1rem;
  margin-top:12px;
  text-decoration:none;
  display:block;
  cursor:pointer;
}

@media(max-width:720px){
  .topbar{height:56px;padding:0 7px}
  .title{font-size:.78rem;letter-spacing:1px}
  .topbtn{font-size:.7rem;padding:8px 8px}
  .hud{font-size:.82rem}
}