:root{
  --bg:#0b1020;
  --panel:#0f1630;
  --panel2:#0b1126;
  --text:#e7ecff;
  --muted:#a8b1d6;
  --border:rgba(255,255,255,.12);
  --shadow:0 18px 50px rgba(0,0,0,.35);
  --accent:#7c5cff;
  --good:#2fe4ab;
  --bad:#ff4d6d;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background: radial-gradient(900px 500px at 20% 15%, rgba(124,92,255,.35), transparent 55%),
              radial-gradient(700px 500px at 85% 30%, rgba(47,228,171,.18), transparent 55%),
              linear-gradient(180deg, #070a16, var(--bg));
}

.shell{
  max-width: 980px;
  margin: 0 auto;
  padding: 22px 16px 28px;
}

.topbar{
  display:flex;
  gap: 14px;
  align-items:flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px 14px;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.title .h1{font-size: 22px; font-weight: 750; letter-spacing:.2px}
.title .sub{margin-top:6px; color:var(--muted); font-size: 13px}

.stats{display:flex; gap: 10px; align-items:center; flex-wrap: wrap}
.stat{
  display:flex;
  gap: 10px;
  align-items:baseline;
  padding: 8px 10px;
  background: rgba(0,0,0,.18);
  border:1px solid var(--border);
  border-radius: 12px;
}
.stat .label{color:var(--muted); font-size: 12px}
.stat .value{font-size: 18px; font-weight: 750}

.btn{
  appearance:none;
  border:1px solid var(--border);
  color:var(--text);
  background: rgba(255,255,255,.06);
  border-radius: 12px;
  padding: 10px 12px;
  cursor:pointer;
  font-weight: 650;
}
.btn:hover{background: rgba(255,255,255,.10)}
.btn:active{transform: translateY(1px)}
.btn.primary{border-color: rgba(124,92,255,.5); background: rgba(124,92,255,.18)}
.btn.primary:hover{background: rgba(124,92,255,.25)}

.boardWrap{
  position: relative;
  margin-top: 16px;
  padding: 14px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

canvas{
  display:block;
  width: min(520px, calc(100vw - 60px));
  height: min(520px, calc(100vw - 60px));
  margin: 0 auto;
  background: transparent;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,.04),
    0 18px 55px rgba(0,0,0,.35);
}

.footer{margin-top: 10px; color:var(--muted); font-size: 13px; padding: 0 4px}
.hint{opacity:.95}

.overlay{
  position:absolute;
  inset: 14px;
  display:grid;
  place-items:center;
  background: rgba(7,10,22,.58);
  border-radius: 16px;
  backdrop-filter: blur(6px);
}

.panel{
  width: min(420px, calc(100% - 24px));
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.14);
  background: linear-gradient(180deg, rgba(15,22,48,.92), rgba(11,17,38,.88));
  box-shadow: 0 30px 90px rgba(0,0,0,.55);
  padding: 16px 16px 14px;
}
.panelTitle{font-size: 18px; font-weight: 800; letter-spacing:.2px}
.panelDesc{margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.45}
.panelActions{display:flex; gap: 10px; margin-top: 14px}

@media (max-width: 520px){
  .panelActions{flex-direction: column}
  .btn{width: 100%}
}

/* Ensure HTML `hidden` works even with our overlay styles */
[hidden]{display:none !important}