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- var f = .7, ay = f*ax;
- d *= f , fs *= f, ad *=f, sw *=f, pr *= f, pr1 *= f, pr2 *= f;

svg(viewBox=[-d, -.5*d, 2*d, d].join(' ') 
		| * { fill: #{darken}; font: #{fs}px consolas, monaco, monospace }
		| svg > [d], [r] { fill: none; stroke: #{darken}; stroke-width: #{2*sw} }
		| [x] + [d] { marker-end: url(#e) }
		| [d] + [x] { font: italic 1em times new roman, serif }
		| [r='#{hr}'] { stroke: #{llight} }
		| [r] + [d] { stroke: #{purple}; stroke-width: #{4*sw} }
		| [d] + [d] { stroke: #{orange}; stroke-width: #{~~(3*sw)} }
		| [r] ~ [d] ~ * { fill: #{orange} }
	marker#e(markerWidth=ad markerHeight=ad 
						viewBox='0 -4 8 8' 
						orient='auto' refX='7')
		path(d='M8 0 0-4V4')
	//-radius text
	text(x=+(-.5*(hrd + fs)).toFixed(e) y=-(.5*hrd + .2*fs)) R
	text(x=+(.5*(hrd - .2*fs)).toFixed(e) y=-(.5*hrd + .2*fs)) R
	path(d=`M${-ax} 0H${ax}`)
	text(x=+(ax - .5*fs).toFixed(e) y=+(-.5*fs).toFixed(e)) x
	text(x=.4*fs y=(ay - .2*fs)) y
	//-helper circles
	circle(cx=-hrd r=hr)
	circle(cx=hrd r=hr)
	//-radius lines
	path(d=`M${-hrd} 0 0${-hrd} ${hrd} 0`)
	//-segment connecting circle central & intersection points
	path(d=`M${-hrd} 0H${hrd}M0${-hrd}V${hrd}`)
	//-highlighted points
	circle(cx=-hrd r=+(pr1).toFixed(e))
	circle(cx=hrd r=+(pr1).toFixed(e))
	circle(cy=-hrd r=+(pr).toFixed(e))
	circle(cy=hrd r=+(pr1).toFixed(e))

// minimal SVG
<svg viewBox='-1750 -875 3500 1750' xmlns=''><style>*{fill:#333;font:105px consolas,monaco,monospace}svg>[d],[r]{fill:none;stroke:#333;stroke-width:7}[x]+[d]{marker-end:url(#e)}[d]+[x]{font:italic 1em times new roman,serif}[r='625']{stroke:#ccc}[r]+[d]{stroke:#95a;stroke-width:14}[d]+[d]{stroke:#f90;stroke-width:10}[r]~[d]~*{fill:#f90}</style><marker id='e' markerWidth='7' markerHeight='7' viewBox='0 -4 8 8' orient='auto' refX='7'><path d='M8 0 0-4V4'/></marker><text x='-274' y='-242'>R</text><text x='211' y='-242'>R</text><path d='M-1230 0H1230'/><text x='1178' y='-53'>x</text><path d='M0-861V861'/><text x='42' y='840'>y</text><circle cx='-442' r='625'/><circle cx='442' r='625'/><path d='M-442 0 0-442 442 0'/><path d='M-442 0H442M0-442V442'/><circle cx='-442' r='13'/><circle cx='442' r='13'/><circle cy='-442' r='18'/><circle cy='442' r='13'/></svg>


                body {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	margin: 0;
	height: 100vh;

svg { display: block }


                // minimal SVG: