:root {
  --win-bg: #008080;
  --win-face: #c0c0c0;
  --win-light: #ffffff;
  --win-shadow: #808080;
  --win-dark: #404040;
  --text: #000000;
  --danger: #ff0000;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--win-bg);
  color: var(--text);
  font-family: "MS Sans Serif", Tahoma, Verdana, sans-serif;
  overscroll-behavior: none;
}

body {
  display: flex;
  justify-content: center;
  padding: max(8px, env(safe-area-inset-top)) 8px max(8px, env(safe-area-inset-bottom));
}

.app {
  width: min(96vw, 420px);
}

.home-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  min-width: 40px;
  min-height: 40px;
  border: 2px solid;
  border-color: var(--win-light) var(--win-dark) var(--win-dark) var(--win-light);
  background: var(--win-face);
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 700;
}

.home-btn:active {
  border-color: var(--win-dark) var(--win-light) var(--win-light) var(--win-dark);
}

.header {
  margin-top: 8px;
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
}

.subtitle {
  margin: 6px 0 10px;
  font-size: 0.86rem;
}

.controls {
  background: var(--win-face);
  border: 3px solid;
  border-color: var(--win-light) var(--win-dark) var(--win-dark) var(--win-light);
  padding: 8px;
}

.stat-group {
  display: flex;
  justify-content: space-between;
  gap: 6px;
}

.stat {
  flex: 1;
  background: #000000;
  border: 2px solid;
  border-color: var(--win-shadow) var(--win-light) var(--win-light) var(--win-shadow);
  color: var(--danger);
  padding: 4px 6px;
}

.stat-label {
  display: block;
  color: #ffb0b0;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat strong {
  font-size: 1.15rem;
  font-family: "Courier New", monospace;
}

.button-group {
  margin-top: 8px;
  display: flex;
  gap: 6px;
}

button {
  appearance: none;
  border: 2px solid;
  border-color: var(--win-light) var(--win-dark) var(--win-dark) var(--win-light);
  background: var(--win-face);
  color: var(--text);
  border-radius: 0;
  padding: 9px 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

button:active {
  border-color: var(--win-dark) var(--win-light) var(--win-light) var(--win-dark);
}

#mode-toggle {
  flex: 1;
}

#mode-toggle.flag-mode {
  background: #ffe8a8;
}

#restart {
  min-width: 92px;
}

.status {
  min-height: 1.25rem;
  margin: 8px 2px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #000000;
}

.status.lose {
  color: #7a0000;
}

.status.win {
  color: #007000;
}

.board {
  --cols: 14;
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  gap: 0;
  background: var(--win-face);
  border: 3px solid;
  border-color: var(--win-shadow) var(--win-light) var(--win-light) var(--win-shadow);
  padding: 6px;
  touch-action: manipulation;
}

.cell {
  aspect-ratio: 1 / 1;
  min-height: 22px;
  border: 2px solid;
  border-color: var(--win-light) var(--win-shadow) var(--win-shadow) var(--win-light);
  border-radius: 0;
  background: var(--win-face);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0;
  line-height: 1;
}

.cell:active:not(.revealed) {
  border-color: var(--win-shadow) var(--win-light) var(--win-light) var(--win-shadow);
  background: #b8b8b8;
}

.cell.revealed {
  border-width: 1px;
  border-style: solid;
  border-color: #7b7b7b;
  background: var(--win-face);
}

.cell.flagged {
  color: #d40000;
  font-size: 0.96rem;
}

.cell.mine {
  background: #ff0000;
  color: #000000;
}

.cell.n1 {
  color: #0000ff;
}

.cell.n2 {
  color: #008000;
}

.cell.n3 {
  color: #ff0000;
}

.cell.n4 {
  color: #000080;
}

.cell.n5 {
  color: #800000;
}

.cell.n6 {
  color: #008080;
}

.cell.n7 {
  color: #000000;
}

.cell.n8 {
  color: #808080;
}

@media (min-width: 560px) {
  .app {
    width: min(95vw, 500px);
  }

  .cell {
    min-height: 24px;
  }
}