:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --panel: #101826;
  --muted: #9fb0c3;
  --text: #e7eef8;
  --line: #223048;
  --chip: #162237;
  --btn: #1d2c46;
  --btn2: #24385a;
  --ok: #1f6feb;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(1200px 600px at 20% 0%, #101a2b 0%, var(--bg) 60%);
  color: var(--text);
}

.wrap { max-width: 980px; margin: 0 auto; padding: 18px; }
.top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--panel) 92%, black 8%);
  border-radius: 14px;
}

.title h1 { margin: 0; font-size: 22px; letter-spacing: 0.2px; }
.sub { margin: 6px 0 0; color: var(--muted); font-size: 13px; }

.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: end;
}
label { display: grid; gap: 6px; font-size: 12px; color: var(--muted); }
label.grow { flex: 1; min-width: 220px; }
select, input {
  padding: 10px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0c1422;
  color: var(--text);
  outline: none;
}
select:focus, input:focus { border-color: #2b4a7a; }

.btn {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--btn2), var(--btn));
  color: var(--text);
  cursor: pointer;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }

.main { padding: 18px 0; }
.panel {
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--panel) 92%, black 8%);
  border-radius: 14px;
  padding: 16px;
}

.row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.chip {
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 10px;
  font-size: 12px;
}

.meta { color: var(--muted); font-size: 13px; }

.board {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, minmax(64px, 110px));
  gap: 10px;
  justify-content: start;
}

.cell {
  height: 92px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #0c1422;
  color: var(--text);
  font-size: 34px;
  font-weight: 650;
  cursor: pointer;
}
.cell:hover { border-color: #2b4a7a; }
.cell:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.foot {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  opacity: 0.9;
}
code {
  background: #0c1422;
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 8px;
}