SVG Foundamentals
This example renders a single white, card-like SVG shape with a drop shadow, demonstrating foundational SVG elements and filters. The code defines an SVG canvas with a 1440×550 viewBox, using a `<path>` with `fill-rule="evenodd"` to create the curved panel. A `<filter>` with `feDropShadow`-style operations (`feOffset`, `feGaussianBlur`, `feColorMatrix`, and `feBlend`) adds a soft gray shadow beneath the shape. The page is a bare HTML document with inline CSS and JavaScript, showing how to embed SVG markup directly.