body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

#game-container {
    text-align: center;
    border: 2px solid #333;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

#controls-hint {
    background-color: #ffe082;
    color: #333;
    padding: 8px 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    font-size: 0.9em;
    font-weight: bold;
}

#game-board {
    background-color: #eee;
    border: 1px solid #ccc;
    display: block;
    margin: 0 auto 15px;
}

#score {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #333;
}

#start-button {
    padding: 10px 20px;
    font-size: 1.2em;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    margin-bottom: 20px;
}

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

#controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
}

.control-button {
    width: 60px;
    height: 60px;
    font-size: 2em;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 10px;
    margin: 5px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.control-button:active {
    background-color: #0056b3;
}

.horizontal-controls {
    display: flex;
    justify-content: space-between;
    width: 200px;
}