:root{
  --bg0:#06070b;
  --bg1:#0b0f1a;
  --card:rgba(17, 20, 30, 0.78);
  --stroke:rgba(255,255,255,0.10);
  --text:#e8ecff;
  --muted:#a5abc4;
  --accent:#8ef0c8;
  --accent2:#8aa8ff;
  --danger:#ff5c7a;
  --shadow: 0 22px 80px rgba(0,0,0,0.55);
  --radius: 18px;

  --sqLight: #2a314b;
  --sqDark: #1a1f33;
  --sqHi: rgba(142,240,200,0.22);
  --sqMove: rgba(138,168,255,0.22);

  --pieceWhite: #f7f8ff;
  --pieceBlack: #0b0f1a;
  --pieceOutline: rgba(255,255,255,0.18);
}

body[data-theme="graphite"]{
  --bg0:#070707;
  --bg1:#0f1115;
  --card:rgba(22, 23, 26, 0.78);
  --stroke:rgba(255,255,255,0.10);
  --text:#f2f2f2;
  --muted:#b3b3b3;
  --accent:#b6ff77;
  --accent2:#7cc2ff;
  --sqLight:#2a2d33;
  --sqDark:#1a1c20;
}

body[data-theme="neon"]{
  --bg0:#05010a;
  --bg1:#12002a;
  --card:rgba(24, 10, 44, 0.78);
  --stroke:rgba(255,255,255,0.12);
  --text:#fff2ff;
  --muted:#d7c6ea;
  --accent:#40ffb0;
  --accent2:#ff6bd6;
  --sqLight:#2b1b4d;
  --sqDark:#1b1035;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  color:var(--text);
  font-family: ui-rounded, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(circle at 20% 10%, rgba(138,168,255,0.28), transparent 40%),
              radial-gradient(circle at 80% 20%, rgba(142,240,200,0.22), transparent 45%),
              radial-gradient(circle at 40% 80%, rgba(255,92,122,0.16), transparent 45%),
              linear-gradient(180deg, var(--bg1), var(--bg0));
}

.bg{
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(rgba(255,255,255,0.055) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: 0.35;
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 5;
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  backdrop-filter: blur(12px);
  background: rgba(0,0,0,0.25);
}

.brand{ display:flex; align-items:center; gap: 12px; }
.logo{ width: 40px; height: 40px; display:grid; place-items:center; border: 1px solid var(--stroke); border-radius: 14px; background: rgba(255,255,255,0.06); }
.title{ font-weight: 900; letter-spacing: 0.3px; }
.subtitle{ color: var(--muted); font-size: 12px; }

.topActions{ display:flex; gap: 10px; align-items:center; flex-wrap: wrap; justify-content:flex-end; }

.shell{ width: min(1100px, calc(100% - 28px)); margin: 18px auto 56px; display:grid; gap: 16px; }

.card{
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 16px;
}

h2{ margin: 0 0 10px; }
h3{ margin: 0 0 10px; }

.muted{ color: var(--muted); }
.tiny{ font-size: 12px; }

.form{ display:grid; gap: 12px; }
.field{ display:grid; gap: 6px; }
.field span{ color: var(--muted); font-size: 12px; }

input, .select{
  width:100%;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  outline:none;
}

input:focus, .select:focus{ box-shadow: 0 0 0 4px rgba(142,240,200,0.18); border-color: rgba(142,240,200,0.45); }

.btn{
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-weight: 900;
  cursor: pointer;
  transition: transform 120ms ease, filter 120ms ease;
  user-select:none;
}

.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); filter: brightness(0.96); }

.btnPrimary{ background: linear-gradient(180deg, rgba(142,240,200,0.32), rgba(255,255,255,0.06)); border-color: rgba(142,240,200,0.30); }
.btnSoft{ background: rgba(255,255,255,0.06); }
.btnDanger{ background: linear-gradient(180deg, rgba(255,92,122,0.36), rgba(255,255,255,0.06)); border-color: rgba(255,92,122,0.35); }

.avatarGrid{ display:grid; grid-template-columns: repeat(8, minmax(0,1fr)); gap: 8px; }
.avatar{
  border: 1px solid var(--stroke);
  border-radius: 14px;
  background: rgba(0,0,0,0.20);
  padding: 10px 0;
  cursor:pointer;
  font-size: 18px;
}
.avatar[data-selected="true"]{ outline: 2px solid rgba(142,240,200,0.65); }

.rowBetween{ display:flex; justify-content: space-between; align-items: center; gap: 12px; }
.rowBetween.wrap{ flex-wrap: wrap; align-items:flex-start; }

.grid2{ display:grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.panel{ border: 1px dashed rgba(255,255,255,0.14); border-radius: 16px; padding: 14px; background: rgba(0,0,0,0.18); }
.joinRow{ display:grid; grid-template-columns: 1fr auto; gap: 10px; align-items:center; }
.mt{ margin-top: 14px; }

.gamesList{ display:grid; gap: 10px; }
.gameRow{ display:flex; justify-content: space-between; align-items:center; gap: 12px; padding: 12px; border:1px solid var(--stroke); border-radius: 16px; background: rgba(0,0,0,0.18); }
.gameLeft{ display:grid; gap: 2px; }
.badge{ display:inline-flex; align-items:center; gap: 8px; font-weight: 900; }
.pill{ font-size: 12px; color: var(--muted); border: 1px solid var(--stroke); background: rgba(255,255,255,0.04); padding: 6px 10px; border-radius: 999px; }

.boardWrap{ display:grid; grid-template-columns: auto 1fr; gap: 14px; align-items:start; }

.board{
  width: min(540px, 92vw);
  aspect-ratio: 1 / 1;
  display:grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  border-radius: 16px;
  overflow:hidden;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(0,0,0,0.18);
}

.square{
  display:grid;
  place-items:center;
  font-size: clamp(26px, 4.8vw, 44px);
  line-height: 1;
  position:relative;
  cursor:pointer;
  user-select:none;
  min-width: 0;
  min-height: 0;
}

.square.light{ background: var(--sqLight); }
.square.dark{ background: var(--sqDark); }
.square.sel{ box-shadow: inset 0 0 0 4px rgba(142,240,200,0.35); }
.square.hi{ box-shadow: inset 0 0 0 4px var(--sqHi); }
.square.move{ box-shadow: inset 0 0 0 4px var(--sqMove); }

.piece{
  display:grid;
  place-items:center;
  width: 100%;
  height: 100%;
  /* default */
  color: var(--pieceWhite);
  text-shadow: 0 2px 0 rgba(0,0,0,0.55), 0 0 18px rgba(0,0,0,0.25);
}

.piece.w{ color: var(--pieceWhite); }
.piece.b{
  color: var(--pieceBlack);
  /* subtle outline so black pieces still read on dark squares */
  text-shadow:
    1px 0 var(--pieceOutline),
    -1px 0 var(--pieceOutline),
    0 1px var(--pieceOutline),
    0 -1px var(--pieceOutline),
    0 2px 0 rgba(0,0,0,0.55),
    0 0 18px rgba(0,0,0,0.25);
}

/* pseudo-pixel effect */
.piece{ filter: contrast(1.05) saturate(1.02); }

.side{ display:grid; gap: 12px; min-width: 0; }

.status{
  padding: 12px;
  border-radius: 16px;
  border:1px solid var(--stroke);
  background: rgba(0,0,0,0.18);
  font-weight: 900;
}

.box{ border:1px solid var(--stroke); border-radius: 16px; background: rgba(0,0,0,0.18); padding: 12px; }
.boxTitle{ font-weight: 900; margin-bottom: 10px; }

.moves{ margin:0; padding-left: 20px; display:grid; gap: 4px; max-height: 280px; overflow:auto; }
.moves li{ color: var(--muted); }

.drawBox{ margin-bottom: 10px; }
.row{ display:flex; gap: 10px; }

.activity{ font-size: 13px; line-height: 1.4; }

.gameActions{ display:flex; flex-wrap: wrap; gap: 10px; justify-content:flex-end; }

#toast{ position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); width: min(760px, calc(100% - 28px)); padding: 12px 14px; border-radius: 999px; text-align:center; }

@media (max-width: 980px){
  .boardWrap{ grid-template-columns: 1fr; }
  .board{ width: 100%; max-width: 620px; margin: 0 auto; }
}

@media (max-width: 720px){
  .grid2{ grid-template-columns: 1fr; }
  .avatarGrid{ grid-template-columns: repeat(6, minmax(0,1fr)); }
}