* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', SimHei, sans-serif;
    background-color: #c0c0c0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.game-container {
    background-color: #c0c0c0;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    padding: 10px;
}

.header {
    margin-bottom: 10px;
}

.info-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #c0c0c0;
    padding: 5px;
    border: 2px solid;
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
    font-size: 18px;
    font-weight: bold;
}

.timer, .mines {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #000;
}

.face {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #000;
}

#face-icon {
    font-size: 24px;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #c0c0c0;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
}

#face-icon:active {
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}

#timer-display, #mine-count {
    color: #ff0000;
    background-color: #000;
    padding: 2px 5px;
    font-family: 'Courier New', monospace;
    font-size: 20px;
    border: 2px solid;
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}

.difficulty-selector {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    justify-content: center;
}

.difficulty-btn {
    padding: 5px 15px;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    background-color: #c0c0c0;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
}

.difficulty-btn:hover {
    background-color: #d0d0d0;
}

.difficulty-btn.active {
    background-color: #c0c0c0;
    color: #000;
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}

.game-board {
    display: grid;
    gap: 1px;
    background-color: #c0c0c0;
    border: 2px solid;
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
    padding: 2px;
    margin-bottom: 10px;
}

.cell {
    width: 24px;
    height: 24px;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    background-color: #c0c0c0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
    cursor: default;
    user-select: none;
}

.cell.revealed {
    border: 1px solid #7b7b7b;
    background-color: #c0c0c0;
}

.cell.mine {
    background-color: #c0c0c0;
    color: #000;
}

.cell.flagged {
    background-color: #c0c0c0;
    color: #000;
}

/* 数字颜色保持经典扫雷的配色 */
.cell.num-1 { color: #0000ff; }
.cell.num-2 { color: #008000; }
.cell.num-3 { color: #ff0000; }
.cell.num-4 { color: #000080; }
.cell.num-5 { color: #800000; }
.cell.num-6 { color: #008080; }
.cell.num-7 { color: #000000; }
.cell.num-8 { color: #808080; }

.controls {
    text-align: center;
}

.control-btn {
    padding: 5px 15px;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    background-color: #c0c0c0;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
}

.control-btn:active {
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}

/* 游戏结束状态 */
.game-over .cell {
    cursor: default;
}

/* 响应式设计 */
@media (max-width: 600px) {
    .cell {
        width: 20px;
        height: 20px;
        font-size: 12px;
    }
    
    .info-panel {
        font-size: 14px;
        padding: 3px;
    }
}

/* 弹窗样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: #c0c0c0;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    padding: 20px;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s;
}

.modal.show .modal-content {
    transform: scale(1);
}

.modal h2 {
    margin-bottom: 15px;
    color: #000;
    font-size: 18px;
}

.qrcode-img {
    width: 180px;
    height: 180px;
    margin-bottom: 15px;
    border: 2px solid;
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}

.close-modal {
    padding: 5px 15px;
    border: 2px solid;
    border-color: #ffffff #7b7b7b #7b7b7b #ffffff;
    background-color: #c0c0c0;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
}

.close-modal:active {
    border-color: #7b7b7b #ffffff #ffffff #7b7b7b;
}