Web-based application architecture diagram, modern minimalist background, whiteboard style, colorful icons, 3D boxes, arrows, lines, nodes, clouds, servers, databases, APIs, microservices, containers, virtual machines, laptops, desktops, mobile devices, screens, keyboards, mice, routers, firewalls, networks, cables, plugs, sockets, clean composition, simple shapes, bold lines, bright colors, isometric perspective, 3/4 view, soft shadows, gentle lighting.