:root {
  color-scheme: dark;
  --bg: #080b16;
  --panel: rgba(255, 255, 255, .08);
  --panel-strong: rgba(255, 255, 255, .14);
  --text: #eef4ff;
  --muted: #9fb0ca;
  --accent: #64e5ff;
  --accent-2: #a78bfa;
  --danger: #ff5d73;
  --good: #57e389;
  --shadow: 0 24px 70px rgba(0, 0, 0, .45);
  --cell: 34px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100svh;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(100, 229, 255, .24), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(167, 139, 250, .22), transparent 32%),
    linear-gradient(145deg, #080b16 0%, #11182b 50%, #090d18 100%);
}
.app { width: min(1120px, calc(100% - 28px)); margin: 0 auto; padding: 38px 0 52px; }
.hero { text-align: center; margin-bottom: 22px; }
.eyebrow { margin: 0 0 8px; color: var(--accent); text-transform: uppercase; letter-spacing: .18em; font-size: 12px; font-weight: 800; }
h1 { margin: 0; font-size: clamp(42px, 9vw, 92px); line-height: .92; letter-spacing: -.07em; text-shadow: 0 12px 42px rgba(100,229,255,.22); }
.subtitle { margin: 14px auto 0; color: var(--muted); max-width: 620px; font-size: 18px; }
.panel {
  border: 1px solid rgba(255,255,255,.13);
  background: linear-gradient(180deg, rgba(255,255,255,.105), rgba(255,255,255,.055));
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.controls { display: flex; gap: 14px; align-items: end; justify-content: center; flex-wrap: wrap; padding: 18px; margin-bottom: 14px; }
.field { display: grid; gap: 6px; }
label, .label { color: var(--muted); font-size: 12px; text-transform: uppercase; font-weight: 800; letter-spacing: .08em; }
select, input, button {
  color: var(--text); background: rgba(3, 8, 20, .68); border: 1px solid rgba(255,255,255,.17); border-radius: 14px; padding: 12px 14px; font: inherit;
}
input { width: 86px; }
.custom-grid { display: contents; }
button { cursor: pointer; transition: transform .15s ease, border-color .15s ease, background .15s ease; }
button:hover { transform: translateY(-1px); border-color: rgba(100,229,255,.6); }
.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #07111d; border: 0; font-weight: 900; }
.status { display: flex; justify-content: center; gap: clamp(24px, 7vw, 72px); align-items: center; padding: 14px 20px; margin-bottom: 14px; }
.status div { display: grid; justify-items: center; gap: 4px; min-width: 92px; }
.status strong { font-size: 34px; font-variant-numeric: tabular-nums; letter-spacing: .04em; }
.face { width: 58px; height: 58px; border-radius: 18px; font-size: 31px; display: grid; place-items: center; background: var(--panel-strong); }
.board-wrap { padding: 16px; overflow-x: auto; }
.message { text-align: center; color: var(--muted); min-height: 24px; margin: 0 0 14px; font-weight: 700; }
.board { display: grid; gap: 4px; justify-content: center; margin: auto; width: max-content; touch-action: manipulation; }
.cell {
  width: var(--cell); height: var(--cell); border: 0; border-radius: 9px; padding: 0; display: grid; place-items: center;
  color: var(--text); background: linear-gradient(145deg, rgba(255,255,255,.20), rgba(255,255,255,.08));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.18), 0 5px 12px rgba(0,0,0,.20);
  font-weight: 900; font-size: 17px; user-select: none;
}
.cell:hover { background: linear-gradient(145deg, rgba(100,229,255,.30), rgba(167,139,250,.16)); }
.cell.revealed { background: rgba(2, 8, 22, .54); box-shadow: inset 0 0 0 1px rgba(255,255,255,.055); cursor: default; }
.cell.flagged { color: #ffd166; }
.cell.mine { background: rgba(255, 93, 115, .22); color: var(--danger); }
.cell.n1 { color: #7cc7ff; } .cell.n2 { color: #57e389; } .cell.n3 { color: #ffd166; } .cell.n4 { color: #c4a7ff; }
.cell.n5 { color: #ff8fab; } .cell.n6 { color: #5eead4; } .cell.n7 { color: #f4f4f5; } .cell.n8 { color: #a1a1aa; }
.help { margin-top: 14px; padding: 18px 22px; color: var(--muted); }
.help h2 { color: var(--text); margin: 0 0 8px; }
.help ul { margin: 0; padding-left: 22px; }
.win { color: var(--good); } .lose { color: var(--danger); }
@media (max-width: 720px) { :root { --cell: 30px; } .controls { align-items: stretch; } .field, .primary { width: 100%; } select { width: 100%; } }