/* fundo darkzão */
body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0a0a0a;
    /* quase preto */
    font-family: 'Courier New', monospace;
    color: #ccc;
}

/* esconde telas */
.hidden {
    display: none;
}

.container {
    text-align: center;
    color: #ccc;
}

/* título dark neon */
h1,
h2 {
    color: #ccc;
    text-shadow: 0 0 10px #8000ff88;
}

.menu {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.menu input {
    width: 220px;
    padding: 10px;
    border: none;
    border-radius: 8px;
    outline: none;
    text-align: center;
    font-size: 1rem;
    background: #111;
    color: #0f0;
    border: 2px solid #8000ff55;
    box-shadow: 0 0 8px #8000ff55;
}

.menu button {
    margin-top: 10px;
    padding: 12px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: #8000ff;
    color: #fff;
    font-weight: bold;
    transition: 0.3s;
}

.menu button:hover {
    background: #0f0;
    color: #000;
    box-shadow: 0 0 15px #0f0;
}

/* layout jogo painel central */
.game {
    display: flex;
    justify-content: center;
    align-items: start;
    background: #111;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 0 20px #8000ff33;
    margin: 0 auto;
}

/* tabuleiro centralizado */
.board-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* tabuleiro */
.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 8px;
    margin: 20px 0;
}

.cell {
    background: #111;
    border: 2px solid #8000ff88;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2.5rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 12px;
    transition: 0.2s;
}

.cell:hover {
    background: #8000ff22;
    transform: scale(1.05);
}

.cell.taken {
    cursor: not-allowed;
    opacity: 0.6;
}

.cell.x {
    color: #0f0;
    text-shadow: 0 0 10px #0f0;
}

.cell.o {
    color: #8000ff;
    text-shadow: 0 0 10px #8000ff;
}

.winner {
    margin-top: 10px;
    font-size: 1.2rem;
    color: #0f0;
    text-shadow: 0 0 10px #0f0;
}

button {
    margin-top: 10px;
    padding: 10px 16px;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    background: #8000ff;
    color: #fff;
    transition: 0.3s;
}

button:hover {
    background: #0f0;
    color: #000;
}

/* ranking fixo no canto superior esquerdo */
.ranking {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 200px;
    padding: 15px;
    border: 2px solid #8000ff55;
    border-radius: 12px;
    background: #0a0a0a;
    box-shadow: 0 0 15px #8000ff22 inset;
    text-align: center;
    z-index: 1000;
}

.ranking h2 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #ccc;
    text-shadow: 0 0 10px #8000ff77;
}

/* responsivo: celular */
@media (max-width: 600px) {
    .game {
        flex-direction: column;
        gap: 20px;
    }

    .ranking {
        position: fixed;
        top: 10px;
        left: 10px;
        right: 10px;
        width: auto;
        padding: 10px;
        font-size: 0.9rem;
    }

    .ranking h2 {
        font-size: 1rem;
        margin-bottom: 5px;
    }

    .board {
        grid-template-columns: repeat(3, 80px);
        grid-template-rows: repeat(3, 80px);
    }

    .cell {
        font-size: 1.8rem;
    }
}