:root{
  --bg:#3A2A1A;
  --ink:#EEF7F2;
  --muted:#9CC2B2;
  --felt:#E3B873;
  --felt-d:#14583D;
  --gold:#FFD166;
  --paper:#fff;
  --paper-ink:#16302A;
  --paper-muted:#5E7A6E;
  --font:"Rubik", "Segoe UI", system-ui, sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{background:var(--bg)}
body{margin:0;color:var(--ink);font:16px/1.35 var(--font);padding-inline:10px;padding-block:6px 10px;-webkit-tap-highlight-color:transparent;
  background:radial-gradient(110% 70% at 50% 30%,#5A4128 0%,#1E140A 80%) fixed,var(--bg)}
.app{max-width:760px;margin-inline:auto;min-height:calc(100dvh - 16px);display:grid;grid-template-rows:auto auto 1fr auto;gap:8px}
.bar{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px}
.back{color:var(--muted);text-decoration:none;font-weight:600;font-size:15px;white-space:nowrap}
.back:hover{color:var(--ink)}
.title{margin:0;font-weight:800;font-size:clamp(1.3rem,4vw,1.9rem)}
.title span{color:var(--gold)}
.bar-actions{display:flex;gap:8px;align-items:center}
.icon-btn{width:42px;height:42px;border-radius:12px;border:0;background:rgba(255,255,255,.1);color:var(--ink);display:grid;place-items:center;cursor:pointer;padding:0}
.icon-btn span{display:grid;place-items:center}
.icon-btn span[hidden]{display:none}
.icon-btn svg{width:22px;height:22px}
button{font:inherit;cursor:pointer}
.btn{border:0;border-radius:12px;background:#E6F2EA;color:var(--paper-ink);font-weight:800;padding:10px 18px;box-shadow:0 4px 0 rgba(0,0,0,.25)}
.btn:active{translate:0 3px;box-shadow:0 1px 0 rgba(0,0,0,.25)}
.btn.small{padding:8px 12px;font-size:14px}
.btn.primary{background:var(--gold);color:#3D2B00;box-shadow:0 4px 0 #B8902A}
.btn.big{font-size:1.15rem;padding:12px 26px;width:100%}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}

.score{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.side{display:flex;align-items:center;gap:8px;background:rgba(0,0,0,.3);border-radius:999px;padding:5px 14px 5px 6px;font-weight:700;border:3px solid transparent}
.side.cur{border-color:var(--gold)}
.side .disc{width:26px;height:26px}
.side b{font-size:1.3rem;color:var(--gold);font-variant-numeric:tabular-nums}
.board-wrap{display:grid;place-items:center;min-height:0}
.board{--sz:min(calc(100vw - 28px),calc(100dvh - 210px),620px);width:var(--sz);height:var(--sz);display:grid;grid-template-columns:repeat(8,1fr);gap:3px;padding:8px;background:#0E3B29;border-radius:16px;box-shadow:0 12px 30px rgba(0,0,0,.4),inset 0 0 0 3px #2B6B4F}
.cell{border:0;padding:0;border-radius:6px;background:var(--felt);display:grid;place-items:center;position:relative;cursor:default}
.cell.alt{background:#1C7450}
.cell.can{cursor:pointer}
.cell.can::after{content:"";width:26%;height:26%;border-radius:50%;background:rgba(255,255,255,.28)}
.cell.can:hover::after{background:rgba(255,255,255,.5)}
.cell.best::after{background:var(--gold);box-shadow:0 0 0 4px rgba(255,209,102,.35);animation:pulse 1s ease-in-out infinite}
@keyframes pulse{50%{scale:1.3}}
.cell.last{box-shadow:inset 0 0 0 3px rgba(255,209,102,.6)}
.disc{width:84%;height:84%;border-radius:50%;position:relative;transition:transform .35s;transform-style:preserve-3d}
.disc.b{background:radial-gradient(circle at 35% 30%,#4A4A55,#15151B 70%);box-shadow:0 3px 0 rgba(0,0,0,.45)}
.disc.w{background:radial-gradient(circle at 35% 30%,#fff,#D9DDE2 70%);box-shadow:0 3px 0 rgba(0,0,0,.35)}
.disc.flip{animation:flip .4s}
.disc.new{animation:drop .3s}
@keyframes flip{50%{transform:rotateY(90deg) scale(1.1)}}
@keyframes drop{from{transform:scale(1.5);opacity:0}}
.hintline{margin:0;text-align:center;color:var(--muted);font-weight:600;min-height:1.4em}
.row{display:flex;gap:10px;justify-content:center}

.overlay{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:16px;background:rgba(5,15,10,.8);overflow-y:auto}
.overlay[hidden]{display:none}
.sheet{width:100%;max-width:460px;background:var(--paper);color:var(--paper-ink);border-radius:22px;padding:18px 20px;display:grid;gap:10px;box-shadow:0 20px 50px rgba(0,0,0,.5)}
.sheet.center{text-align:center;justify-items:center}
.sheet h2{margin:0;font-size:1.5rem}
.help{margin:0;font-size:13.5px;color:var(--paper-muted);line-height:1.55}
.help b{color:var(--paper-ink)}
.trophy{font-size:54px;line-height:1}
.end-title{margin:0;font-weight:800;font-size:1.5rem}
.lead{margin:0;color:var(--paper-muted);font-weight:700}
fieldset{border:0;margin:0;padding:0;display:grid;gap:6px;min-width:0}
fieldset[hidden],.seg[hidden]{display:none}
legend{font-size:12.5px;font-weight:800;letter-spacing:.07em;text-transform:uppercase;color:var(--paper-muted);margin-bottom:3px;padding:0;display:flex;align-items:center;gap:6px}
.seg{display:flex;border:3px solid rgba(22,48,42,.12);border-radius:12px;overflow:hidden}
.seg label{position:relative;cursor:pointer;flex:1;min-width:0}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;padding:8px 6px;font-size:14px;font-weight:700;color:var(--paper-muted);text-align:center}
.seg label + label span{border-left:2px solid rgba(22,48,42,.1)}
.seg input:checked + span{background:var(--paper-ink);color:#fff}
.seg input:focus-visible + span{outline:3px solid #3D8BFD;outline-offset:-3px}
.names input[type=text]{width:100%;font:700 1rem var(--font);color:var(--paper-ink);padding:8px 10px;border-radius:11px;border:3px solid rgba(22,48,42,.12);background:#EFF6F1}
.toggle{display:flex;align-items:center;gap:6px;font-weight:600;font-size:14px}
.toggle input{width:20px;height:20px;accent-color:var(--paper-ink)}
.mini{width:18px;height:18px;border-radius:50%;display:inline-block}
.mini.b{background:#15151B}.mini.w{background:#fff;box-shadow:inset 0 0 0 2px #ccc}
@media (max-width:560px){ .back-tx{display:none} .back{font-size:20px} .side{font-size:14px} }
.board{grid-template-columns:repeat(13,1fr);gap:0;padding:10px;background:#C99A55;box-shadow:0 12px 30px rgba(0,0,0,.4),inset 0 0 0 3px #A57B3E}
.cell{border-radius:0;background:transparent !important;position:relative;cursor:pointer}
.cell::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1.5px;background:#7A5A2A;translate:-50% 0}
.cell::after{content:"";position:absolute;top:50%;left:0;right:0;height:1.5px;background:#7A5A2A;translate:0 -50%;width:auto;border-radius:0}
.cell .disc{width:86%;height:86%;z-index:1}
.cell.best .ring{position:absolute;inset:18%;border-radius:50%;box-shadow:0 0 0 3px #FFD166;animation:pulse 1s ease-in-out infinite;z-index:2}
.cell.danger .ring{position:absolute;inset:18%;border-radius:50%;box-shadow:0 0 0 3px #E5484D;animation:pulse 1s ease-in-out infinite;z-index:2}
.cell.win .disc{box-shadow:0 0 0 3px #FFD166,0 0 12px #FFD166}
.cell.last .disc{outline:2px solid #FFD166;outline-offset:-6px}
.cell:hover::after{background:#5A3A10}