.game-board {
    display: grid;
    gap: 2px;
    margin: 20px auto;
    background-color: #ccc;
    padding: 2px;
    border-radius: 4px;
    justify-content: center;
}

.cell {
    width: 30px;
    height: 30px;
    background-color: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    border-radius: 2px;
}

.cell:hover {
    background-color: #ddd;
}

.cell.revealed {
    background-color: #fff;
}

.cell.mine {
    background-color: #ff4444;
    color: white;
}

.cell.flagged {
    background-color: #ffeb3b;
}

.cell[data-number="1"] { color: #2196F3; }
.cell[data-number="2"] { color: #4CAF50; }
.cell[data-number="3"] { color: #FF5722; }
.cell[data-number="4"] { color: #673AB7; }
.cell[data-number="5"] { color: #795548; }
.cell[data-number="6"] { color: #607D8B; }
.cell[data-number="7"] { color: #000000; }
.cell[data-number="8"] { color: #757575; }

@media (max-width: 640px) {
    .cell {
        width: 25px;
        height: 25px;
        font-size: 14px;
    }
}

/* 自定义难度对话框样式 */
.custom-dialog {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
    background: var(--b1);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 0 1rem rgba(0, 0, 0, 0.2);
}

.custom-dialog.show {
    display: block;
}

.dialog-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.dialog-overlay.show {
    display: block;
}

/* 作弊面板样式 */
#cheatPanel {
    transition: opacity 0.3s ease;
    opacity: 1;
}

#cheatPanel.hidden {
    display: none;
    opacity: 0;
}

/* 作弊按钮悬停效果 */
.btn-error:hover {
    transform: scale(1.05);
    transition: transform 0.2s ease;
}