:root{--bg-color: #e8e8e8;--cell-hidden-bg: #c0c0c0;--cell-hidden-border-light: #ffffff;--cell-hidden-border-dark: #808080;--cell-revealed-bg: #d0d0d0;--cell-exploded-bg: #ff4444;--accent: #4a90d9;--text-color: #222}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-color);color:var(--text-color);overflow-x:hidden;user-select:none;-webkit-user-select:none}.app{display:flex;flex-direction:column;align-items:center;padding:8px;min-height:100vh;max-width:520px;margin:0 auto}.title{font-size:22px;font-weight:700;margin-bottom:8px;text-align:center}.settings{width:100%;margin-bottom:8px}.presets{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.preset-btn{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 12px;border:2px solid #b0b0b0;border-radius:8px;background:#fff;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s;color:var(--text-color)}.preset-btn:active,.preset-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.preset-info{font-size:10px;font-weight:400;opacity:.7}.custom-settings{margin-top:8px;padding:10px;background:#fff;border-radius:10px;border:1px solid #ccc}.custom-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.custom-row label{font-size:14px;font-weight:500}.custom-row input{width:70px;padding:6px 8px;border:1px solid #bbb;border-radius:6px;font-size:14px;text-align:center}.start-btn{width:100%;padding:10px;margin-top:4px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer}.start-btn:active{opacity:.8}.status-bar{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 12px;margin-bottom:6px;background:#333;color:#f44;border-radius:8px;font-family:Courier New,monospace;font-size:18px;font-weight:700}.status-mines,.status-time{min-width:70px}.status-time{text-align:right}.status-face{background:none;border:none;font-size:28px;cursor:pointer;line-height:1;padding:0 4px}.game-message{padding:8px 20px;margin-bottom:6px;border-radius:8px;font-size:16px;font-weight:700;text-align:center}.game-message.won{background:#d4edda;color:#155724}.game-message.lost{background:#f8d7da;color:#721c24}.board-container{overflow:auto;max-width:100%;touch-action:manipulation}.board-wrapper{display:inline-block;background:#999;padding:2px;border-radius:4px}.board{background:#999}.cell{display:flex;align-items:center;justify-content:center;font-weight:700;cursor:pointer;transition:none;position:relative}.cell.hidden-cell{background:var(--cell-hidden-bg);border-top:2px solid var(--cell-hidden-border-light);border-left:2px solid var(--cell-hidden-border-light);border-right:2px solid var(--cell-hidden-border-dark);border-bottom:2px solid var(--cell-hidden-border-dark)}.cell.hidden-cell:active{border:1px solid #999;background:#b8b8b8}.cell.flagged{background:var(--cell-hidden-bg);border-top:2px solid var(--cell-hidden-border-light);border-left:2px solid var(--cell-hidden-border-light);border-right:2px solid var(--cell-hidden-border-dark);border-bottom:2px solid var(--cell-hidden-border-dark)}.cell.revealed{background:var(--cell-revealed-bg);border:1px solid #bbb;cursor:default}.cell.exploded{background:var(--cell-exploded-bg)!important}.board-container::-webkit-scrollbar{height:4px}.board-container::-webkit-scrollbar-thumb{background:#aaa;border-radius:2px}