* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

#canvas-container {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background: #ffffff;
}

#canvas {
    position: absolute;
    width: 20000px;
    height: 20000px;
    left: -10000px;
    top: -10000px;
    transform-origin: 10000px 10000px;
    background-image: radial-gradient(circle, #a8d4f0 2px, transparent 3px);
    background-size: 50px 50px;
    background-position: 0 0;
}

.card {
    position: absolute;
    width: 300px;
    height: 500px;
    background: #fef9e7;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: grab;
    user-select: none;
    transition: box-shadow 0.2s ease;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.card.dragging {
    cursor: grabbing;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    z-index: 1000;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    display: block;
}