* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #141e30, #243b55);
    color: white;
}

.game-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.08);
    padding: 35px;
    border-radius: 25px;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
    backdrop-filter: blur(12px);
    width: 420px;
}

h1 {
    font-size: 42px;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.scoreboard {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: bold;
    background: rgba(255,255,255,0.1);
    padding: 10px;
    border-radius: 12px;
}

.status {
    margin-bottom: 20px;
    font-size: 22px;
    min-height: 30px;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 110px);
    gap: 10px;
    justify-content: center;
    margin-bottom: 25px;
}

.cell {
    width: 110px;
    height: 110px;
    background: rgba(255,255,255,0.95);
    border-radius: 18px;
    font-size: 46px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: 0.3s;
    user-select: none;
}

.cell:hover {
    transform: scale(1.06);
    background: white;
    box-shadow: 0 0 12px rgba(255,255,255,0.5);
}

button {
    padding: 13px 28px;
    font-size: 18px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    background: white;
    color: #222;
    font-weight: bold;
    transition: 0.3s;
}

button:hover {
    transform: scale(1.05);
    background: #e8e8e8;
    box-shadow: 0 0 10px rgba(255,255,255,0.4);
}

.x-style {
    color: #1e3c72;
    animation: pop 0.3s ease;
}

.o-style {
    color: #c94b4b;
    animation: pop 0.3s ease;
}

.winner {
    background: #8ef58e !important;
    transform: scale(1.08);
    box-shadow: 0 0 18px rgba(142,245,142,0.9);
}

@keyframes pop {
    0% {
        transform: scale(0.4);
        opacity: 0.2;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@media(max-width: 500px) {
    .game-container {
        width: 95%;
        padding: 20px;
    }

    .board {
        grid-template-columns: repeat(3, 90px);
    }

    .cell {
        width: 90px;
        height: 90px;
        font-size: 38px;
    }
}