body {
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.matrix-input {
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.matrix {
    display: grid;
    grid-template-columns: repeat(2, 60px);
    gap: 10px;
    margin: 20px 0;
}

input[type="number"] {
    width: 60px;
    height: 30px;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 8px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

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

#canvas-container {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

.instructions {
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.instructions p {
    margin: 5px 0;
    color: #666;
}

.mode-display {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    margin: 10px 0;
    text-align: center;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}