* { box-sizing: border-box; margin: 0; padding: 0; }
body { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #0d1117; color: #e6edf3; font-family: system-ui, sans-serif; touch-action: manipulation; user-select: none; }
.wrap { width: min(100vw, 360px); padding: 12px; text-align: center; }
.hud { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; }
.hud__title { font-weight: 700; }
.toolbar { display: flex; gap: 8px; justify-content: center; margin-bottom: 8px; }
.mode { padding: 6px 14px; border-radius: 8px; border: 1px solid #30363d; background: #21262d; color: #fff; cursor: pointer; font-size: 12px; }
.mode--active { border-color: #58a6ff; background: #30363d; }
.board { display: grid; grid-template-columns: repeat(9, 1fr); gap: 2px; padding: 6px; border: 2px solid #30363d; border-radius: 10px; background: #161b22; }
.cell { aspect-ratio: 1; border: none; border-radius: 4px; background: #21262d; color: #58a6ff; font-size: 11px; font-weight: 700; cursor: pointer; }
.cell--open { background: #161b22; cursor: default; }
.cell--flag { color: #f85149; }
.cell--mine { background: #f85149; }
.hint { margin-top: 8px; font-size: 12px; color: #8b949e; }