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

.cell.revealed {
    border: 1px solid #999;
    background-color: #f5f5f5;
}

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

.cell.mine {
    background-color: #f44336;
}

.cell-1 { color: blue; }
.cell-2 { color: green; }
.cell-3 { color: red; }
.cell-4 { color: darkblue; }
.cell-5 { color: brown; }
.cell-6 { color: teal; }
.cell-7 { color: black; }
.cell-8 { color: gray; }

#mobile-notice-toast {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(10px);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 5vw;
    z-index: 10000;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    /* max-width: 90dvw; */
    text-align: center;
    opacity: 0;
    visibility: hidden;
}

@media (max-width: 768px) {
    .container {
        overflow: hidden;
    }
}