body {
    background: #f8f9fa;
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
}

.game-container {
    width: 100%;
    max-width: 350px;
    margin: 50px auto;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.07);
    padding: 32px 20px 24px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    margin-bottom: 16px;
    color: #333;
    font-size: 2rem;
    letter-spacing: 1px;
}

#player-indicator {
    margin-bottom: 18px;
    font-size: 1.1rem;
    color: #444;
}

#current-player {
    font-weight: 700;
    color: #2196f3;
    font-size: 1.2em;
}

#board {
    display: grid;
    grid-template-columns: repeat(3, 64px);
    grid-template-rows: repeat(3, 64px);
    gap: 8px;
    margin-bottom: 22px;
}

.cell {
    width: 64px;
    height: 64px;
    background: #f1f3f4;
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: #333;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    user-select: none;
}

.cell:hover {
    background: #e3e8ee;
    box-shadow: 0 2px 8px rgba(33,150,243,0.08);
}

.cell.winner {
    background: #bbf7d0;
    color: #15803d;
    font-weight: bold;
}

#reset-btn {
    background: #2196f3;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 22px;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 12px;
    transition: background 0.2s;
}

#reset-btn:hover {
    background: #1769aa;
}

#game-message {
    min-height: 28px;
    font-size: 1.1rem;
    color: #e53935;
    margin-top: 6px;
    text-align: center;
    font-weight: 500;
}