:root{
  --bg:#0d0d0d; --bg2:#000000; --panel:#1a1a1a; --stone:#333333;
  --gold:#ffcc00; --gold-dim:#cc9900; --ink:#ffffff; --dim:#999999; --err:#ff5c5c;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:radial-gradient(1200px 800px at 50% -10%, #1a1a1a 0%, var(--bg) 55%);
  color:var(--ink); font-family:"Trebuchet MS","Segoe UI",system-ui,sans-serif;
  min-height:100%; -webkit-user-select:none; user-select:none;
}
button{font:inherit;font-weight:700;cursor:pointer;border:none;border-radius:10px;
  padding:11px 22px;color:#141414;background:linear-gradient(#ffe066,var(--gold-dim));
  box-shadow:0 5px 0 #8a6a00, 0 8px 18px rgba(0,0,0,.5); transition:transform .05s}
button:active{transform:translateY(3px);box-shadow:0 2px 0 #8a6a00,0 5px 12px rgba(0,0,0,.5)}
button.ghost{background:transparent;color:var(--ink);border:1px solid var(--stone);box-shadow:none}
button.ghost:active{transform:none}

nav{display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;max-width:1080px;margin:0 auto}
.brand{font-size:20px;font-weight:700;color:var(--gold)}
.brand span{color:var(--dim);font-weight:400;font-size:13px}
.nav-right{display:flex;gap:10px;align-items:center}
.nav-right .who{color:var(--dim);font-size:14px;margin-right:4px}

/* Landing */
#landing{max-width:820px;margin:40px auto 60px;padding:0 20px;text-align:center}
.hero h1{font-size:clamp(26px,5vw,42px);line-height:1.12;letter-spacing:.3px}
.lede{color:var(--dim);max-width:560px;margin:18px auto 0;line-height:1.6;font-size:16px}
.cta-row{display:flex;gap:12px;justify-content:center;margin:26px 0}
.prize-strip{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:8px}
.prize-strip .p{background:var(--panel);border:1px solid var(--stone);border-radius:12px;
  padding:10px 16px;font-size:14px}
.prize-strip .p b{color:var(--gold);display:block;font-size:18px}
.steps{max-width:560px;margin:44px auto 0;text-align:left;color:var(--dim);
  line-height:1.7;padding-left:22px}
.steps b{color:var(--ink)}

/* Arena */
#arena{max-width:1080px;margin:20px auto 60px;padding:0 20px;
  display:grid;grid-template-columns:1fr 320px;gap:24px;align-items:start}
.play-head{display:flex;justify-content:space-between;align-items:center;
  padding:6px 4px 12px;font-size:15px}
.play-head b{color:var(--gold);font-variant-numeric:tabular-nums}
.play-head .status{color:var(--dim);font-size:13px}
.stage{position:relative;border:2px solid var(--stone);border-radius:14px;overflow:hidden;
  background:radial-gradient(700px 500px at 50% 42%, #1f1f1f, #050505);
  box-shadow:0 18px 50px rgba(0,0,0,.45), inset 0 0 60px rgba(0,0,0,.35);touch-action:none}
canvas{display:block;margin:0 auto}
.cover{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:14px;text-align:center;padding:24px;
  background:rgba(0,0,0,.85);backdrop-filter:blur(3px)}
.cover.hidden{display:none}
.cover h2{font-size:28px;color:var(--gold)}
.cover p{max-width:400px;color:var(--dim);line-height:1.5;font-size:14px}
.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:10px}
kbd{background:var(--stone);border-radius:4px;padding:1px 6px;font-size:11px}

/* Board */
.board-col{background:var(--panel);border:1px solid var(--stone);border-radius:14px;
  padding:16px;position:sticky;top:16px}
.board-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:4px}
.board-head h3{font-size:16px}
.reset{color:var(--dim);font-size:12px}
.myrank{color:var(--dim);font-size:13px;margin:8px 0 12px;min-height:18px}
.myrank b{color:var(--gold)}
.board{list-style:none;display:flex;flex-direction:column;gap:2px}
.board li{display:flex;align-items:center;gap:10px;padding:8px 8px;border-radius:8px;font-size:14px}
.board li.me{background:rgba(255,204,0,.14)}
.board .rk{width:26px;text-align:center;color:var(--dim);font-weight:700}
.board li.top1 .rk,.board li.top2 .rk,.board li.top3 .rk{color:var(--gold)}
.board .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.board .pt{color:var(--gold);font-variant-numeric:tabular-nums;font-weight:700}
.board .pz{font-size:11px;color:var(--dim);margin-left:6px}
.board .empty{color:var(--dim);font-size:13px;padding:14px 4px}

/* Modal */
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  background:rgba(0,0,0,.75);backdrop-filter:blur(3px);z-index:50;padding:20px}
.modal.hidden{display:none}
.card{background:var(--panel);border:1px solid var(--stone);border-radius:16px;
  padding:26px;width:100%;max-width:360px;position:relative}
.card h2{color:var(--gold);margin-bottom:16px}
.x{position:absolute;top:10px;right:10px;background:none;box-shadow:none;color:var(--dim);
  font-size:22px;padding:4px 10px}
.x:active{transform:none}
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;color:var(--dim);margin-bottom:5px}
.field input{width:100%;background:var(--bg2);border:1px solid var(--stone);border-radius:9px;
  padding:11px 12px;color:var(--ink);font:inherit}
.field input:focus{outline:none;border-color:var(--gold-dim)}
.card > button{width:100%;margin-top:6px}
.err{color:var(--err);font-size:13px;min-height:18px;margin-bottom:6px}
.swap{text-align:center;color:var(--dim);font-size:13px;margin-top:14px}
.swap a{color:var(--gold)}

.hidden{display:none}
@media(max-width:820px){#arena{grid-template-columns:1fr}.board-col{position:static}}