:root{
  --bg:#0b0e14;
  --panel:#121826;
  --panel2:#0f1422;
  --text:#e6e8ee;
  --muted:#a6adbb;
  --border:#283044;

  /* Tabuleiro */
  --light:#e7eef7;
  --dark:#5f778f;
  --grid: rgba(10, 14, 20, .35);

  /* Peças ("branco" = azul) */
  --whitePiece:#4aa3ff;
  --blackPiece:#0f1116;

  --hl:#f7ec64;     /* xeque */
  --danger:#ff5b5b; /* mate */
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial;
  background:linear-gradient(180deg, var(--bg), #070a10 70%);
  color:var(--text);
}

.top{
  display:flex;
  gap:16px;
  align-items:flex-end;
  justify-content:space-between;
  padding:18px 18px 10px;
  border-bottom:1px solid var(--border);
  background:rgba(0,0,0,0.25);
  backdrop-filter: blur(10px);
  position:sticky;
  top:0;
  z-index:10;
}

h1{margin:0;font-size:20px;letter-spacing:0.2px}
.subtitle{margin-top:4px;color:var(--muted);font-size:13px}

.pillRow{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(18,24,38,.7);
  font-size:12px;
  color:rgba(230,232,238,.95);
}
.pill.muted{color:rgba(230,232,238,.75)}

.btn{
  padding:10px 12px;
  border-radius:12px;
  background:var(--panel);
  border:1px solid var(--border);
  color:var(--text);
  cursor:pointer;
}
.btn:hover{filter:brightness(1.08)}
.btn:disabled{opacity:.5;cursor:not-allowed}

.layout{
  display:flex;
  justify-content:center;
  gap:18px;
  padding:18px;
  align-items:start;
}
@media (max-width: 980px){
  .layout{flex-direction:column;align-items:center}
  .top{align-items:flex-start}
  .pillRow{justify-content:flex-start}
}

.boardWrap{position:relative}

/* Painel abaixo do tabuleiro */
.bottomPanel{margin-top:14px;width:100%}
.bottomPanel .panelCard{width:100%}

/* Moldura: coordenadas fora do tabuleiro + sizing em pixels inteiros */
.boardFrame{
  --coord: 28px;
  --sq: 72px;
  --gap: 2px;

  width: calc(var(--coord) + (var(--sq) * 8) + (var(--gap) * 9));
  height: calc(var(--coord) + (var(--sq) * 8) + (var(--gap) * 9));
  display:grid;
  grid-template-columns: var(--coord) calc((var(--sq) * 8) + (var(--gap) * 9));
  grid-template-rows: calc((var(--sq) * 8) + (var(--gap) * 9)) var(--coord);
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  background: rgba(18,24,38,.65);
}

.ranks{display:flex;flex-direction:column;padding: var(--gap);gap: var(--gap);}
.files{display:flex;padding: var(--gap);gap: var(--gap);}
.corner{background: rgba(0,0,0,.15)}

.coordLabel{
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  color: rgba(230,232,238,.75);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace;
  letter-spacing:.3px;
  user-select:none;
}
.ranks .coordLabel{height: var(--sq); width: 100%}
.files .coordLabel{width: var(--sq); height: 100%}

.board{
  width: calc((var(--sq) * 8) + (var(--gap) * 9));
  height: calc((var(--sq) * 8) + (var(--gap) * 9));
  display:grid;
  grid-template-columns: repeat(8, var(--sq));
  grid-auto-rows: var(--sq);
  gap: var(--gap);
  padding: var(--gap);
  background: var(--grid);
}

.sq{
  width: var(--sq);
  height: var(--sq);
  display:flex;
  align-items:center;
  justify-content:center;
  user-select:none;
  cursor:pointer;
  position:relative;
  overflow:hidden;
}
.sq.light{background:var(--light)}
.sq.dark{background:var(--dark)}
.sq:hover{filter:brightness(1.03)}

/* Peças */
.pieceTok{
  width: calc(var(--sq) * 0.60);
  height: calc(var(--sq) * 0.60);
  display:flex;
  align-items:center;
  justify-content:center;
  pointer-events:none;
  transform: translateZ(0);
}
.pieceTok svg{width:100%;height:100%;display:block}
.pieceTok.w{color: var(--whitePiece); filter: drop-shadow(0 2px 0 rgba(0,0,0,.25));}
.pieceTok.b{color: var(--blackPiece); filter: drop-shadow(0 2px 0 rgba(255,255,255,.20));}

/* Seleção / destinos */
.sq.sel::after{
  content:"";
  position:absolute;
  inset:0;
  outline: 3px solid rgba(255,255,255,.75);
  outline-offset:-3px;
}
.sq.to::before{
  content:"";
  width: 22%;
  height: 22%;
  border-radius:999px;
  background: rgba(10,14,20,.30);
  position:absolute;
}
.sq.to.capture::before{
  width: 84%;
  height: 84%;
  border: 4px solid rgba(10,14,20,.30);
  background: transparent;
}
.sq.from{box-shadow: inset 0 0 0 4px rgba(247,236,100,.35)}

/* Rei em xeque / xeque-mate */
.sq.kingCheck{ box-shadow: inset 0 0 0 4px var(--hl); }
.sq.kingMate{ box-shadow: inset 0 0 0 4px var(--danger); }

.panelCard{
  padding:14px;
  border:1px solid var(--border);
  border-radius:16px;
  background:rgba(18,24,38,.7);
  box-shadow: 0 10px 30px rgba(0,0,0,.20);
}

.statusLine{font-size:14px}
.statusLine.warn{color:var(--hl); font-weight:800; font-size:16px}
.statusLine.danger{color:var(--danger); font-weight:900; font-size:16px}
.statusLine.muted{color:rgba(230,232,238,.92)}

.lastMove{margin-top:6px;color:var(--muted);font-size:13px; line-height:1.25}

/* Side */
.side{width: 340px; min-width: 300px;}
@media (max-width: 980px){
  .side{width: min(660px, 94vw);}
}
.panelTitle{font-weight:900; margin-bottom:10px; letter-spacing:.2px}
.players{display:flex; flex-direction:column; gap:8px;}
.playerRow{display:flex; align-items:center; gap:10px;}
.pname{color:rgba(230,232,238,.95); font-weight:700}
.spectators{margin-top:10px;color:var(--muted);font-size:13px}
.tag{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:2px 10px;
  border-radius:999px;
  font-weight:900;
  font-size:12px;
  border:1px solid rgba(255,255,255,.16);
}
.tag.white{background: rgba(74,163,255,.14); border-color: rgba(74,163,255,.22)}
.tag.black{background: rgba(15,17,22,.10);}

/* Chat */
.chatCard{margin-top:14px}
.chatLog{
  height: 330px;
  overflow:auto;
  padding:10px;
  border:1px solid rgba(255,255,255,.10);
  border-radius:12px;
  background: rgba(0,0,0,.18);
}
.chatMsg{margin:0 0 10px 0; line-height:1.25; font-size:13px;}
.chatName{font-weight:900; color: rgba(230,232,238,.95)}
.chatText{color: rgba(230,232,238,.88)}
.chatTime{color: rgba(230,232,238,.55); font-size:11px; margin-left:6px}
.chatBox{display:flex; gap:10px; margin-top:10px}
.chatInput{
  flex:1;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(0,0,0,.18);
  color: var(--text);
  outline:none;
}
.chatInput:focus{border-color: rgba(247,236,100,.55)}
.chatHint{margin-top:8px; color: rgba(230,232,238,.60); font-size:12px}

/* Toast */
.toast{
  position:fixed;
  top:14px;
  right:14px;
  z-index:100;
  padding:10px 12px;
  border-radius:14px;
  border:1px solid var(--border);
  background: rgba(18,24,38,.92);
  box-shadow: 0 18px 60px rgba(0,0,0,.55);
  font-weight:900;
}
.toast.warn{color:var(--hl)}
.toast.danger{color:var(--danger)}
.toast.muted{color:rgba(230,232,238,.92)}
.hidden{display:none}

/* Overlays */
.overlay{
  position:fixed;
  inset:0;
  z-index:200;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(0,0,0,.60);
  padding: 18px;
}
.overlay.hidden{display:none}
.modal{
  width: min(620px, 96vw);
  background: rgba(18,24,38,.95);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 18px 60px rgba(0,0,0,.55);
  padding: 16px;
}
.modalTitle{font-weight:1000; font-size:18px; margin-bottom:10px}
.modalText{color: rgba(230,232,238,.86); font-size:13px; line-height:1.35; margin-bottom:12px}
.modalSmall{margin-top:10px; color: rgba(230,232,238,.62); font-size:12px}
.row{display:flex; gap:10px; align-items:center;}
.textInput{
  flex:1;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(0,0,0,.18);
  color: var(--text);
  outline:none;
}
.textInput:focus{border-color: rgba(247,236,100,.55)}
.err{margin-top:10px; color: var(--danger); font-weight:800; font-size:13px}