:root{
  --bg: #0f0f12;
  --panel: #15151a;
  --white: #f2f2f2;
  --gray: #9a9aa3;
}

* { box-sizing: border-box; }
body{
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 50% 20%, #1b1b22, var(--bg));
  color: var(--white);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  display: grid;
  place-items: center;
}

.wrap{
  width: min(980px, 94vw);
}

.topbar{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap: 16px;
  margin-bottom: 10px;
}

h1{
  margin: 0;
  font-size: 20px;
  letter-spacing: .5px;
}

.hint{
  color: var(--gray);
  font-size: 12px;
  text-align: right;
}

.board{
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  padding: 12px;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
}

canvas{
  width: 100%;
  height: auto;
  display:block;
  border-radius: 10px;
  background: #0b0b0e;
}

.footer{
  margin-top: 10px;
  color: var(--gray);
  font-size: 12px;
  display:flex;
  justify-content:center;
}