body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
    color: #333;
}

.container {
    text-align: center;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

h1 {
    margin-top: 0;
    color: #2c3e50;
}

#status {
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: bold;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 5px;
    margin-bottom: 20px;
    background-color: #34495e;
    border: 5px solid #34495e;
    border-radius: 5px;
}

.cell {
    background-color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

.cell:hover {
    background-color: #f9f9f9;
}

/* Cores diferentes para X e O */
.cell.x { color: #e74c3c; }
.cell.o { color: #3498db; }

button {
    padding: 10px 20px;
    font-size: 1rem;
    font-weight: bold;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #2ecc71;
}