body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    flex-direction: column;
}

#sudoku-container {
    margin-bottom: 20px;
}

input {
    text-align: center;
    font-size: 24px;
    border: 1px solid #000;
    box-sizing: border-box;
}

.button-container {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.button-container button {
    font-size: 24px;
    width: 40px;
    height: 40px;
    margin: 5px;
    border-radius: 6px;
}

.solve-button {
    margin-top: 20px;
    font-size: 28px;
    width: 200px;
    height: 60px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
}

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