:root{
  --bg0:#1d2733; --bg1:#0a0e14;
  --panel:rgba(255,255,255,.06); --panel-brd:rgba(255,255,255,.13);
  --ink:#eef4fb; --ink-dim:#9fb0c6; --accent:#7fd8ea; --gold:#f2c14e; --sel:#ffd873;
  --bs:360px; --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family:"Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1100px 700px at 70% -10%,#2b3d4f 0%,transparent 60%),
    radial-gradient(900px 600px at 0% 110%,#172a33 0%,transparent 55%),
    linear-gradient(160deg,var(--bg0),var(--bg1));
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}
.app{display:flex;flex-direction:column;align-items:center;gap:10px;padding:4px 4px 24px;min-height:100dvh}
.app.wide{flex-direction:row;align-items:flex-start;justify-content:center;gap:18px;padding:8px 12px}
.stage{display:flex;flex-direction:column;align-items:stretch;width:var(--bs);flex:none}
.app.wide .stage{position:sticky;top:8px}
.side{width:min(100%,var(--bs));display:flex;flex-direction:column;gap:10px;min-width:0}
.app:not(.wide) .side{width:min(100%,560px)}
.app.wide .side{width:clamp(280px,32vw,420px);max-height:calc(100dvh - 16px);overflow-y:auto;padding-right:2px;scrollbar-width:thin}

/* strips */
.strip{height:38px;display:flex;align-items:center;justify-content:space-between;padding:0 6px;gap:8px}
.who{display:flex;align-items:center;gap:8px;min-width:0}
.avatar{width:24px;height:24px;border-radius:50%;flex:none;background:center/88% no-repeat;box-shadow:0 0 0 1px rgba(255,255,255,.18),0 2px 6px rgba(0,0,0,.5)}
.avatar.w{background-color:#e9dcc0}.avatar.b{background-color:#3a2a20}
.name{font-weight:650;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.strip.turn .name{color:var(--sel)}
.think{display:none;gap:3px}
.think.on{display:inline-flex}
.think i{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:blink 1s infinite ease-in-out}
.think i:nth-child(2){animation-delay:.15s}.think i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,100%{opacity:.2;transform:translateY(0)}50%{opacity:1;transform:translateY(-2px)}}
.caps{display:flex;align-items:center;flex-wrap:nowrap;overflow:hidden;min-width:0}
.caps img{width:20px;height:20px;margin-left:-6px;filter:drop-shadow(0 1px 1px rgba(0,0,0,.6))}
.caps img:first-child{margin-left:0}
.caps img.gap{margin-left:2px}
.caps .adv{margin-left:6px;font-size:13px;font-weight:700;color:var(--ink-dim)}

/* board */
.board{
  position:relative;width:var(--bs);height:var(--bs);border-radius:var(--radius);
  padding:calc(var(--bs) * .034);
  background:
    linear-gradient(160deg,rgba(255,226,190,.25),rgba(255,210,160,0) 30%,rgba(0,0,0,0) 62%,rgba(30,12,2,.45)),
    url("img/frame.jpg") center/cover;
  background-color:#4a1f12;
  box-shadow:0 30px 60px -22px rgba(0,0,0,.95),0 0 0 1px rgba(30,14,4,.9),
    inset 0 2px 0 rgba(255,220,180,.4),inset 0 -3px 0 rgba(20,8,0,.55);
  touch-action:none;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;
}
.board-inner{position:relative;width:100%;height:100%;border-radius:3px;overflow:hidden;background:#3a2212;
  box-shadow:0 0 0 2px rgba(25,10,2,.85),0 0 0 3px rgba(255,214,168,.22)}
.board-inner::after{content:"";position:absolute;inset:0;z-index:4;pointer-events:none;
  background:linear-gradient(118deg,rgba(255,240,215,.13) 0%,rgba(255,240,215,0) 36%,rgba(0,0,0,0) 66%,rgba(0,0,0,.14) 100%);
  box-shadow:inset 0 0 18px rgba(20,8,0,.5)}
.squares{position:absolute;inset:0;display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr)}
.sq{position:relative;background-repeat:no-repeat}
.sq.light{background-image:url("img/maple.jpg");background-color:#e9cf9f;background-size:800% 800%;
  box-shadow:inset 0 0 6px rgba(150,100,40,.18)}
.sq.dark{background-image:linear-gradient(rgba(214,158,108,.24),rgba(190,135,90,.2)),url("img/walnut.jpg");background-color:#5e3c26;
  background-size:100% 100%,800% 800%;box-shadow:inset 0 0 8px rgba(10,4,0,.25)}
.coord{position:absolute;font-weight:700;font-size:calc(var(--bs) * .026);line-height:1;pointer-events:none;opacity:.85}
.sq.light .coord{color:#7a4f2c}.sq.dark .coord{color:#e6c9a0}
.coord.r{left:4%;top:5%}.coord.f{right:5%;bottom:4%}

.layer,.pieces{position:absolute;inset:0;pointer-events:none}
.hcell{position:absolute;left:0;top:0;width:12.5%;height:12.5%;display:flex;align-items:center;justify-content:center}
.hcell.last{background:rgba(255,214,90,.34)}
.hcell.selected{background:rgba(127,216,234,.42);box-shadow:inset 0 0 0 2px rgba(190,240,250,.7)}
.hcell.hover{box-shadow:inset 0 0 0 3px rgba(255,255,255,.75)}
.hcell.check{background:radial-gradient(circle,rgba(255,40,30,.95) 0%,rgba(230,30,20,.55) 40%,rgba(200,0,0,0) 72%)}
.hcell .dot{width:30%;height:30%;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,var(--sel));
  box-shadow:0 0 10px rgba(255,224,138,.8);opacity:.9;animation:pop .2s ease-out both}
.hcell .ring{position:absolute;inset:5%;border-radius:50%;border:calc(var(--bs) * .008 + 1px) solid var(--sel);
  box-shadow:0 0 12px rgba(255,224,138,.55),inset 0 0 10px rgba(255,224,138,.35);animation:pop .2s ease-out both}
@keyframes pop{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}

.piece{position:absolute;left:0;top:0;width:12.5%;height:12.5%;z-index:2;
  transition:transform .24s cubic-bezier(.3,1.05,.5,1);will-change:transform}
.piece .img{position:absolute;inset:3% 4% 5% 4%;background:center bottom/contain no-repeat;
  transition:transform .15s ease,filter .15s ease}
.piece.b .img{filter:drop-shadow(0 0 1px rgba(255,220,180,.35))}
.piece.lift .img{transform:translateY(-6%) scale(1.06);filter:drop-shadow(0 8px 6px rgba(0,0,0,.5))}
.piece.drag{transition:none;z-index:6}
.piece.drag .img{transform:scale(1.18) translateY(-12%);filter:drop-shadow(0 12px 10px rgba(0,0,0,.55))}
.piece.gone{opacity:0;transition:opacity .2s ease}
.board.mine{cursor:pointer}
.r3d-canvas{position:absolute;z-index:5;pointer-events:none;display:block}
.board.r3d .piece .img{visibility:hidden}

.promo{position:absolute;inset:0;z-index:8;background:rgba(8,12,18,.55);backdrop-filter:blur(2px)}
.promo .col{position:absolute;width:12.5%;display:flex;flex-direction:column;background:#f4ead6;border-radius:8px;
  box-shadow:0 10px 30px rgba(0,0,0,.6);overflow:hidden}
.promo button{border:0;padding:0;aspect-ratio:1;background:center/82% no-repeat;border-bottom:1px solid rgba(0,0,0,.08)}
.promo button:hover,.promo button:focus-visible{background-color:#ffe39a;outline:none}

/* side panel */
.head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;padding:2px 4px 0;flex-wrap:wrap}
h1{margin:0;font-size:clamp(28px,4vw,40px);letter-spacing:.02em;
  background:linear-gradient(180deg,#fff,#a9c3d6);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--ink-dim);font-size:14px;letter-spacing:.02em}
.card{background:var(--panel);border:1px solid var(--panel-brd);border-radius:var(--radius);padding:12px 14px;
  box-shadow:0 10px 24px -14px rgba(0,0,0,.7),inset 0 1px 0 rgba(255,255,255,.05)}
.label{font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#9fb6cc;margin-bottom:8px}
.label.mt{margin-top:12px}
.status{display:flex;align-items:center;gap:12px}
.status-ico{width:30px;height:30px;flex:none;background:center/contain no-repeat;filter:drop-shadow(0 2px 3px rgba(0,0,0,.6))}
.status-title{font-weight:750;font-size:18px}
.status-sub{color:var(--ink-dim);font-size:14px;margin-top:2px;line-height:1.35}
.status.check{border-color:rgba(255,110,90,.6);box-shadow:0 0 0 1px rgba(255,110,90,.25),0 0 22px -6px rgba(255,80,60,.6)}
.status.over{border-color:rgba(242,193,78,.6)}
.seg{display:flex;background:rgba(0,0,0,.25);border-radius:11px;padding:4px;gap:4px}
.seg button{flex:1;white-space:nowrap;border:0;background:transparent;border-radius:8px;padding:9px 4px;font-weight:650;font-size:14px;color:#b8c7d8;min-height:40px}
.seg button.on{background:linear-gradient(180deg,#3e6a86,#2b4f68);color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.15)}
.note{font-size:12px;color:var(--ink-dim);margin-top:8px;min-height:1em;opacity:0;transition:opacity .2s}
.note.on{opacity:1}
.btns{display:flex;gap:8px;margin-top:10px}
.btn{flex:1;display:inline-flex;white-space:nowrap;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:8px 10px;border-radius:11px;
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);font-weight:650;font-size:15px}
.btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.btn:disabled{opacity:.4;cursor:default}
.btn.primary{background:linear-gradient(180deg,#8fe3f2,#4fb3cc);color:#08222b;border-color:rgba(255,255,255,.35);
  box-shadow:0 6px 18px -6px rgba(79,179,204,.8)}
.btn:not(:disabled):active{transform:translateY(1px)}
.moves{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:auto 1fr 1fr;gap:2px 10px;max-height:190px;overflow-y:auto;
  font-variant-numeric:tabular-nums;font-size:15px}
.moves li{display:contents}
.moves .n{color:#6f8398;text-align:right}
.moves .m{padding:1px 6px;border-radius:5px}
.moves .m.cur{background:rgba(127,216,234,.2);color:#fff}
.empty{color:var(--ink-dim);font-size:14px}
.lb{list-style:none;margin:0;padding:0;font-size:15px}
.lb li{display:flex;justify-content:space-between;padding:4px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.lb li:last-child{border-bottom:0}
.lb li.me{color:var(--sel)}
.lb a{color:inherit}
.rules ul{margin:0;padding-left:18px;color:#c8d5e3;font-size:14.5px;line-height:1.45}
.rules li{margin:4px 0}
.rules b{color:#fff}

/* modals */
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:14px;
  background:rgba(6,10,16,.5);backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px)}
.modal[hidden]{display:none}
.sheet{width:min(460px,100%);max-height:calc(100dvh - 28px);overflow-y:auto;
  background:linear-gradient(180deg,rgba(40,58,78,.97),rgba(20,30,42,.97));
  border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:18px 16px 16px;box-shadow:0 30px 70px rgba(0,0,0,.7);
  animation:rise .25s ease-out both}
@keyframes rise{from{transform:translateY(14px);opacity:0}to{transform:none;opacity:1}}
.sheet h2{margin:0;text-align:center;font-size:clamp(22px,6vw,28px)}
.msub{margin:4px 0 12px;text-align:center;color:var(--ink-dim)}
.seg.big{margin-bottom:10px}
.opt{display:flex;align-items:center;gap:14px;width:100%;text-align:left;margin-top:8px;padding:11px 14px;border-radius:12px;
  border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04)}
.opt:hover,.opt:focus-visible{border-color:rgba(127,216,234,.8);background:rgba(127,216,234,.12);outline:none}
.opt.on{border-color:rgba(127,216,234,.8);background:rgba(62,106,134,.45)}
.opt b{display:block;font-size:17px}
.opt small{display:block;color:var(--ink-dim);font-size:13.5px;margin-top:1px}
.pips{width:48px;flex:none;display:flex;gap:4px}
.pips i{width:11px;height:11px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff3cf,#c79a4c);box-shadow:0 1px 2px rgba(0,0,0,.5)}
.pips i.d{background:radial-gradient(circle at 35% 30%,#9a6a48,#2a170d)}
.sheet.end{text-align:center}
.trophy{width:72px;height:72px;margin:0 auto 6px;background:center/contain no-repeat;filter:drop-shadow(0 6px 10px rgba(0,0,0,.6))}

/* online */
.online .on-text{color:#c8d5e3;font-size:14.5px;line-height:1.4}
.online .on-text b{color:#fff}
.online.live{border-color:rgba(127,216,234,.45)}
.online.alert{border-color:rgba(242,193,78,.7);box-shadow:0 0 0 1px rgba(242,193,78,.25),0 0 22px -8px rgba(242,193,78,.7)}
.on-link{margin-top:10px}
.on-link input{width:100%;min-height:40px;border-radius:10px;border:1px solid rgba(255,255,255,.16);background:rgba(0,0,0,.28);
  color:var(--ink);font:inherit;font-size:13.5px;padding:8px 10px;text-overflow:ellipsis}
.btns.wrap{flex-wrap:wrap}
.btns.wrap .btn{flex:1 1 130px}
.btn.danger{border-color:rgba(255,120,100,.45);color:#ffc4b8}
.btn.danger.armed{background:rgba(220,70,50,.35);color:#fff}
.btn.small{flex:0 0 auto;min-height:36px;font-size:13.5px;padding:6px 12px;color:var(--ink-dim)}
.label.mt2{margin:16px 0 0}
.pips.net{justify-content:center}
.pips.net svg{width:26px;height:26px;fill:none;stroke:var(--accent);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.dotlive{display:inline-block;width:8px;height:8px;border-radius:50%;background:#5fd38a;margin-right:6px;vertical-align:1px;box-shadow:0 0 8px #5fd38a}
.dotlive.off{background:#8a97a6;box-shadow:none}