:root {
  color-scheme: dark;
  --bg: #111827;
  --panel: rgba(17, 24, 39, .82);
  --panel-2: rgba(31, 41, 55, .92);
  --text: #f9fafb;
  --muted: #a7b0c0;
  --accent: #38bdf8;
  --accent-2: #f472b6;
  --danger: #fb7185;
  --good: #34d399;
  --cell: #94a3b8;
  --cell-dark: #64748b;
  --open: #dbe4ee;
  --open-2: #cbd5e1;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
  min-height: 100svh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 15%, rgba(56, 189, 248, .22), transparent 32rem),
    radial-gradient(circle at 82% 12%, rgba(244, 114, 182, .16), transparent 28rem),
    linear-gradient(135deg, #0f172a, var(--bg));
  display: grid;
  place-items: center;
  padding: 22px;
}

.app { width: min(100%, 980px); display: grid; gap: 18px; }
.hero { text-align: center; }
.eyebrow { margin: 0 0 6px; color: var(--accent); text-transform: uppercase; letter-spacing: .16em; font-size: .76rem; font-weight: 800; }
h1 { margin: 0; font-size: clamp(2.2rem, 8vw, 5rem); line-height: .92; letter-spacing: -.07em; }
.intro { margin: 14px auto 0; color: var(--muted); max-width: 38rem; }

.panel {
  margin-inline: auto;
  width: fit-content;
  max-width: 100%;
  padding: clamp(14px, 3vw, 24px);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 24px 70px rgba(0,0,0,.42), inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter: blur(14px);
}

.stats { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center; margin-bottom: 14px; }
.stats > div {
  min-width: 88px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(0,0,0,.28);
  text-align: center;
  border: 1px solid rgba(255,255,255,.08);
}
.stats span { display: block; font: 800 1.55rem/1 ui-monospace, SFMono-Regular, Menlo, monospace; color: #fef3c7; }
.stats small { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; }
#newGame {
  width: 58px; height: 58px; border: 0; border-radius: 18px; cursor: pointer;
  font-size: 1.8rem; background: linear-gradient(145deg, #e2e8f0, #94a3b8); box-shadow: 0 8px 0 #475569, 0 18px 24px rgba(0,0,0,.32);
}
#newGame:active { transform: translateY(4px); box-shadow: 0 4px 0 #475569, 0 10px 18px rgba(0,0,0,.25); }

.controls { display: flex; justify-content: space-between; gap: 12px; align-items: end; flex-wrap: wrap; margin-bottom: 10px; color: var(--muted); font-size: .9rem; }
select { display: block; margin-top: 5px; color: var(--text); background: var(--panel-2); border: 1px solid rgba(255,255,255,.14); border-radius: 12px; padding: 9px 34px 9px 10px; }
.flag-mode { display: flex; gap: 7px; align-items: center; padding-bottom: 8px; user-select: none; }
.status { min-height: 1.3em; margin: 6px 0 14px; color: var(--muted); text-align: center; }
.status.win { color: var(--good); font-weight: 800; }
.status.lose { color: var(--danger); font-weight: 800; }

.board {
  --cols: 9;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  gap: 3px;
  justify-content: center;
  overflow: auto;
  max-width: calc(100vw - 54px);
  padding: 8px;
  border-radius: 18px;
  background: rgba(15, 23, 42, .78);
  border: 1px solid rgba(255,255,255,.08);
}
.cell {
  width: var(--cell-size); height: var(--cell-size);
  border: 0; border-radius: 7px;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--cell), var(--cell-dark));
  color: #0f172a; font-weight: 900; font-size: calc(var(--cell-size) * .5);
  cursor: pointer; user-select: none;
  box-shadow: inset 2px 2px 0 rgba(255,255,255,.28), inset -2px -2px 0 rgba(15,23,42,.24);
}
.cell:hover:not(.open) { filter: brightness(1.09); }
.cell.open { cursor: default; background: linear-gradient(145deg, var(--open), var(--open-2)); box-shadow: inset 0 0 0 1px rgba(15,23,42,.1); }
.cell.flagged { color: #ef4444; }
.cell.mine.open { background: linear-gradient(145deg, #fecdd3, #fb7185); }
.cell.n1 { color: #2563eb; } .cell.n2 { color: #16a34a; } .cell.n3 { color: #dc2626; }
.cell.n4 { color: #7c3aed; } .cell.n5 { color: #b45309; } .cell.n6 { color: #0891b2; }
.cell.n7 { color: #111827; } .cell.n8 { color: #64748b; }
.hint { margin: 14px 0 0; color: var(--muted); font-size: .85rem; text-align: center; }

/* The training wheels are structural. */
.board.henodus-board .cell {
  width: min(58vw, 220px);
  height: min(58vw, 220px);
  font-size: clamp(3rem, 20vw, 7rem);
  border-radius: 30px;
}

@media (max-width: 680px) {
  body { padding: 14px; }
  .panel { border-radius: 22px; width: 100%; }
  .stats > div { min-width: 70px; }
  .board { justify-content: start; max-width: 100%; }
}