body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: 'Arial', sans-serif;
    background-color: #2c2c54;
}

.container {
    text-align: center;
}

h1 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 2.5rem;
    letter-spacing: 2px;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 10px;
    margin: 0 auto;
}

.cell {
    background-color: #40407a;
    border: 2px solid transparent;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: bold;
    color: #f7f1e3;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s, border-color 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.cell:hover {
    background-color: #596275;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.7);
}

.cell.X {
    color: #ff5252;
}

.cell.O {
    color: #2ecc71;
}

.cell.winning {
    border-color: #ffd700;
    background-color: #333;
    animation: winner-glow 1s ease-in-out infinite alternate;
}

@keyframes winner-glow {
    from {
        box-shadow: 0 0 10px rgba(255, 215, 0, 0.8);
    }
    to {
        box-shadow: 0 0 20px rgba(255, 215, 0, 1);
    }
}

#reset {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #34ace0;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

#reset:hover {
    background-color: #227093;
}

#message {
    margin-top: 20px;
    font-size: 1.5rem;
    color: #ffd700;
    transition: transform 0.5s;
}

.message-show {
    transform: scale(1.1);
}