:root{--bg:#0d1024;--card:#161a38;--line:#2a3063;--tx:#eef0ff;--mut:#9aa2d6;--acc:#a855f7}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--tx);font:15px/1.45 ui-rounded,"Nunito","Segoe UI",system-ui,sans-serif;padding:env(safe-area-inset-top) 12px env(safe-area-inset-bottom)}
.app{max-width:880px;margin:0 auto;padding:14px 0 28px}
header{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
h1{margin:0;font-size:24px;font-weight:800;letter-spacing:.02em}
main{display:grid;grid-template-columns:150px auto 190px;gap:16px;justify-content:center;align-items:start}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;margin:0 0 12px}
.card h2{margin:0 0 8px;font-size:13px;font-weight:600;color:var(--mut)}
canvas{display:block;margin:0 auto;max-width:100%}
.stats div{display:flex;justify-content:space-between;align-items:baseline;padding:4px 0}
.stats span{color:var(--mut);font-size:13px}.stats b{font-size:19px;font-variant-numeric:tabular-nums}
.board-wrap{position:relative;width:300px;border:2px solid var(--line);border-radius:6px;overflow:hidden;background:#080a1a}
#board{width:100%;height:auto;aspect-ratio:1/2}
#overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:20px;background:rgba(8,10,26,.84)}
#overlay[hidden]{display:none}
#overlay h2{margin:0;font-size:28px}#overlay p{margin:0;color:var(--mut)}
.btn{font:inherit;font-weight:700;color:#fff;background:var(--acc);border:0;border-radius:10px;padding:10px 20px;cursor:pointer}
.btn:hover{filter:brightness(1.12)}.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--tx)}
.btn.sm{padding:6px 12px;font-size:13px}
button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid #22d3ee;outline-offset:2px}
#acct{display:flex;gap:8px;align-items:center}#acct .who{font-weight:700}
#lb{margin:0;padding-left:22px;font-size:14px}#lb li{padding:2px 0}#lb li.me{color:#facc15}#lb span{float:right;font-variant-numeric:tabular-nums;color:var(--mut)}
.help p{margin:3px 0;font-size:13px;color:var(--mut)}
kbd{background:#0d1024;border:1px solid var(--line);border-radius:5px;padding:0 6px;font:inherit;font-size:12px;color:var(--tx)}
#touch{display:none;grid-template-columns:repeat(3,1fr);gap:8px;max-width:340px;margin:14px auto 0}
#touch button{font:inherit;font-weight:700;font-size:18px;color:var(--tx);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 0;touch-action:none;user-select:none;-webkit-user-select:none}
#touch button:active{background:var(--acc)}
dialog{background:var(--card);color:var(--tx);border:1px solid var(--line);border-radius:14px;padding:22px;width:min(340px,92vw)}
dialog::backdrop{background:rgba(5,6,16,.7)}
dialog h2{margin:0 0 12px}
label{display:block;margin-bottom:12px;font-size:13px;color:var(--mut)}
input{display:block;width:100%;margin-top:4px;padding:10px;font:inherit;color:var(--tx);background:#0d1024;border:1px solid var(--line);border-radius:8px}
#er{min-height:20px;margin:0 0 8px;color:#f87171;font-size:13px}
.row{display:flex;gap:8px}.sw{margin:14px 0 0;font-size:13px}.sw a{color:#22d3ee}
@media (max-width:780px){
  main{grid-template-columns:1fr}
  .board-wrap{order:-1;margin:0 auto;width:min(300px,100%,calc((100dvh - 270px)/2))}
  .side{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
  .side .help{display:none}
}
@media (pointer:coarse){#touch{display:grid}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}