curl --request POST \
  --url https://api.iotools.cloud/v1/tool/css-gradient-shadow-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "gradientType": "linear",
  "angle": "135",
  "color1": "#ff5f6d",
  "position1": "0",
  "color2": "#a855f7",
  "position2": "50",
  "useColor3": "",
  "color3": "#00d4ff",
  "position3": "100",
  "useColor4": "",
  "color4": "#facc15",
  "position4": "100",
  "blur": "40",
  "spread": "20",
  "opacity": "80",
  "borderRadius": "16"
}
'

{
  "tool": "css-gradient-shadow-generator",
  "tool_version": "1.0.2",
  "outputs": {
    "cssCode": ".glow {\n  position: relative;\n  isolation: isolate;\n}\n\n.glow::before {\n  content: \"\";\n  position: absolute;\n  inset: -20px;\n  z-index: -1;\n  border-radius: 16px;\n  opacity: 0.80;\n  filter: blur(40px);\n  background: linear-gradient(135deg, #ff5f6d 0%, #a855f7 50%);\n}",
    "previewHtml": "<div style=\"position:relative;display:inline-block;isolation:isolate;\"><div style=\"position:absolute;inset:-20px;z-index:-1;border-radius:16px;opacity:0.80;filter:blur(40px);background:linear-gradient(135deg, #ff5f6d 0%, #a855f7 50%);\"></div><div style=\"position:relative;width:200px;height:120px;border-radius:16px;background:#18181b;display:flex;align-items:center;justify-content:center;color:#fff;font:600 14px system-ui, sans-serif;\">Your content</div></div>"
  },
  "credits_used": 5,
  "credits_remaining": null
}