body {
    background-color: #252525;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: 'Roboto', sans-serif;
}

#gameContainer {
    text-align: center;
    color: white;
}

.cell {
    width: 75px;
    height: 75px;
    border: 2px solid #ffcc00;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
    line-height: 75px;
    font-size: 36px;
    cursor: pointer;
    color: #ffcc00;
    background-color: #1a1a1a;
    transition: background-color 0.3s, color 0.3s, transform 0.2s;
}

.cell:hover {
    background-color: #ffcc00;
    color: #1a1a1a;
    transform: scale(1.1);
}

.winning-cell {
    background-color: #ffcc00;
    color: #1a1a1a;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

#cellContainer {
    display: grid;
    grid-template-columns: repeat(3, auto);
    width: 225px;
    margin: auto;
    gap: 5px;
}

#restartBtn {
    background-color: #ffcc00;
    color: #1a1a1a;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
    border-radius: 5px;
    transition: background-color 0.3s, color 0.3s, transform 0.2s;
}

#restartBtn:hover {
    background-color: #1a1a1a;
    color: #ffcc00;
    transform: scale(1.05);
}