:root {
  --page-bg: #f0f0f0;
  --cell-bg: #d0d0d0;
  --cell-revealed-bg: #e8e8e8;
  --text-dark: #333333;
  --text-light: #f5f5f5;
  --accent: #4a6fa5;
  --border: #999999;
  --gap: 2px;
  --radius: 4px;
  --cell-size: 28px;

  --panel-bg: #ffffff;
  --panel-border: #e0e0e0;
  --panel-radius: 10px;
  --text-muted: #767676;

  --win: #2e9e5b;
  --loss: #c0392b;
  --mine-bg: #e08080;

  --n1: #0000fe;
  --n2: #007b00;
  --n3: #fe0000;
  --n4: #00007b;
  --n5: #7b0000;
  --n6: #007b7b;
  --n7: #000000;
  --n8: #7b7b7b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--page-bg);
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--text-dark);
}

.container {
  width: auto;
  max-width: 95vw;
}

.header {
  text-align: center;
  margin-bottom: 16px;
}

.title {
  font-size: 2rem;
  font-weight: bold;
  margin: 0;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.stat-box {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-dark);
  border-radius: var(--panel-radius);
  padding: 6px 16px;
  text-align: center;
  min-width: 70px;
}

.stat-label {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.stat-value {
  display: block;
  font-size: 1.15rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.new-game-btn {
  background: var(--accent);
  color: var(--text-light);
  border: none;
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: bold;
  cursor: pointer;
}

.new-game-btn:hover {
  opacity: 0.9;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.controls label {
  color: var(--text-muted);
}

.controls select {
  appearance: none;
  background: var(--panel-bg) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="6" viewBox="0 0 10 6"><path d="M1 1l4 4 4-4" fill="none" stroke="%23767676" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg>')
    no-repeat right 10px center;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  color: var(--text-dark);
  font-size: 0.9rem;
  font-family: inherit;
  padding: 6px 28px 6px 12px;
  cursor: pointer;
}

.controls select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.best-time-label {
  color: var(--text-muted);
}

.best-time-label #best-time {
  font-weight: 600;
  color: var(--text-dark);
  font-variant-numeric: tabular-nums;
}

.board-wrapper {
  max-width: 95vw;
  overflow-x: auto;
  display: flex;
  justify-content: center;
}

.board-frame {
  position: relative;
  display: inline-block;
}

.board {
  display: inline-grid;
  gap: var(--gap);
  background: var(--border);
  border-radius: var(--radius);
  padding: var(--gap);
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cell-bg);
  box-shadow:
    inset 2px 2px 0 rgba(255, 255, 255, 0.7),
    inset -2px -2px 0 rgba(0, 0, 0, 0.25);
  font-size: calc(var(--cell-size) * 0.55);
  font-weight: bold;
  line-height: 1;
  user-select: none;
  cursor: pointer;
  touch-action: manipulation;
}

.cell.revealed {
  cursor: default;
  background: var(--cell-revealed-bg);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.cell.mine {
  background: var(--mine-bg);
}

.cell.n1 { color: var(--n1); }
.cell.n2 { color: var(--n2); }
.cell.n3 { color: var(--n3); }
.cell.n4 { color: var(--n4); }
.cell.n5 { color: var(--n5); }
.cell.n6 { color: var(--n6); }
.cell.n7 { color: var(--n7); }
.cell.n8 { color: var(--n8); }

.notice-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  max-width: 90%;
  margin: 0 auto 12px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: bold;
  text-align: center;
  color: var(--text-light);
  background: var(--accent);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.notice-pill[hidden] {
  display: none;
}

.notice-pill.win {
  background: var(--win);
}

.notice-pill.loss {
  background: var(--loss);
}

.confetti-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  pointer-events: none;
}