body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f4f4f4;
}

.container {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    text-align: center;
    color: #333;
}

.image-upload-section, 
.image-preview-section, 
.cell-selection-section, 
.results-section {
    margin-bottom: 20px;
    text-align: center;
}

input[type="file"] {
    margin: 10px 0;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 10px 2px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s;
}

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

.canvas-container {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

#imageCanvas, #overlayCanvas, #resultCanvas {
    max-width: 100%;
    border: 1px solid #ddd;
}

#overlayCanvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

.selected-cells-preview {
    display: flex;
    justify-content: center;
    margin: 10px 0;
}

.selected-cell-thumbnail {
    width: 50px;
    height: 50px;
    margin: 0 5px;
    border: 2px solid #4CAF50;
}

.result-details {
    text-align: center;
}

#cellCountDisplay {
    font-size: 24px;
    font-weight: bold;
    color: #4CAF50;
}