body {
            font-family: 'Inter', sans-serif;
        }
        @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');
        .wall-canvas {
            background-image: linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px);
            background-size: 20px 20px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            border: 1px solid #e2e8f0;
            overflow: hidden; /* Important for containing posters */
        }
        .poster {
            position: absolute;
            cursor: grab;
            transition: box-shadow 0.2s ease-in-out, transform 0.2s ease-in-out;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            border: 2px solid white;
            overflow: hidden;
            user-select: none;
            background-size: cover;
            background-position: center;
            background-color: #e2e8f0;
        }
        .poster:hover {
            box-shadow: 0 6px 12px rgba(0,0,0,0.25);
            transform: scale(1.02);
        }
        .poster.dragging {
            cursor: grabbing;
            z-index: 1000;
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
            transform: scale(1.05);
        }
        .control-panel::-webkit-scrollbar {
            width: 8px;
        }
        .control-panel::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        .control-panel::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 4px;
        }
        .control-panel::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }