body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

#username-screen, #game-screen {
    max-width: 600px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
    padding: 25px;
    margin: 20px auto;
    text-align: center;
}

#username-screen h1, #game-screen h1 {
    font-size: 24px;
    margin-bottom: 20px;
}

#username-input {
    width: calc(100% - 30px);
    padding: 10px;
    margin: 10px 0;
    font-size: 18px;
    border-radius: 5px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

button {
    margin: 10px 5px;
    padding: 10px 20px;
    font-size: 18px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

#game-board {
    width: 80vmin;
    height: 80vmin;
    background-color: #000;
    display: grid;
    grid-template-columns: repeat(64, 1fr);
    grid-template-rows: repeat(64, 1fr);
    gap: 0;
    margin: 20px auto;
}

#controls {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

#controls button {
    margin: 5px;
    padding: 15px 30px;
    font-size: 16px;
}

#info {
    margin-top: 20px;
    font-size: 18px;
}

#info span {
    margin-right: 20px;
}