body {
    margin: 0;
    padding: 0;
    background-color: #f0f2f5;
    font-family: Arial, sans-serif;
    overflow: hidden;
}

.canvas {
    position: absolute;
    width: 100000px;
    height: 100000px;
    background-image: 
        linear-gradient(90deg, rgba(229,232,235,0.4) 1px, transparent 1px),
        linear-gradient(rgba(229,232,235,0.4) 1px, transparent 1px);
    background-size: 10px 10px;
    background-position: 0px 0px;
    background-color: #ffffff;
    transform-origin: 0 0;
    background-attachment: local;
}

.canvas.dragover {
    background-color: rgba(0, 123, 255, 0.1);
}

.image-container {
    position: absolute;
    cursor: move;
    padding: 10px;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-radius: 4px;
    transition: box-shadow 0.3s;
}

.image-container:hover {
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.image-container img {
    max-width: 200px;
    display: block;
}

.upload-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.image-container.selected {
    outline: 2px solid #007bff;
}

.image-container img {
    max-width: 200px;
    height: auto;
    user-select: none;
}

.image-container.dragging {
    opacity: 0.8;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
}