styles.css

body {
    font-family: 'Roboto', Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: url('rm251-mind-16.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #ffffff;
}

.container {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.score {
    display: flex;
    justify-content: space-around;
    font-size: 18px;
    margin-bottom: 20px;
    color: #4ecdc4;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-gap: 10px;
    margin: 20px auto;
    max-width: 300px;
}

.cell {
    aspect-ratio: 1 / 1;
    background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid #4ecdc4;
    font-size: 48px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.cell:hover, .cell:focus {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
    outline: none;
}

.cell.x, .cell.o {
    cursor: not-allowed;
}

.cell.x::before, .cell.o::before {
    display: block;
    animation: appear 0.3s ease-in-out;
}

.cell.x::before {
    content: 'X';
    color: #ff6b6b;
}

.cell.o::before {
    content: 'O';
    color: #4ecdc4;
}

@keyframes appear {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

.status {
    font-size: 24px;
    margin: 20px 0;
    min-height: 1.2em;
    color: #feca57;
    text-shadow: 0 0 5px #feca57;
}

button {
    font-size: 18px;
    padding: 10px 20px;
    cursor: pointer;
    background-color: #ff6b6b;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

button:hover, button:focus {
    background-color: #ff5252;
    transform: scale(1.05);
    outline: none;
}

@media (max-width: 480px) {
    .board {
        grid-template-columns: repeat(3, 1fr);
    }

    .cell {
        font-size: 36px;
    }

    .status {
        font-size: 18px;
    }

    button {
        font-size: 16px;
    }
}