A small CSS reset that I wrote in early 2019

expanded: rjset.css

:root {
	--co: #eee;
	--cr: #ff4136;
	--cg: #2ecc40;
	--cb: #0074d9;
	--cc: #00bcd4;
	--cm: #e91e63;
	--cy: #ffdc00;
	--ck: #0a0b08;
	--cbg: #fff;
	--cbgrgb: 255, 255, 255;
	--cfg: var(--ck);
	--fss: arial, 'Helvetica Neue', helvetica, sans-serif;
	--fs: georgia, palatino, 'Palatino Linotype', times, 'Times New Roman', serif;
	--fh: 'Proxima Nova', 'Montserrat', 'Arial Black', 'Arial Bold', gadget, sans-serif;
	--fm: 'Courier New', courier, 'Lucida Sans Typewriter', 'Lucida Typewriter', monospace;
	--s7: 2.80492446em;
	--s6: 2.243939568em;
	--s5: 1.7951516544em;
	--s4: 1.4361213235em;
	--s3: 1.1488970588em;
	--s2: 0.9191176471em;
	--s1: 0.7352941176em;
	--s0: 0.5882352941em;
	--s-1: 0.4705882353em;
	--s-2: 0.3764705882em;
}
*,
*::before,
*::after {
	box-sizing: border-box;
}
html,
body {
	overflow: auto;
}
body,
h1,
h2,
h3,
h4,
p,
li,
blockquote,
figure,
dl,
dd {
	margin: 0;
}
ul[class],
ol[class] {
	list-style: none;
	margin: 0;
	padding: 0;
}
input,
button,
textarea,
select,
pre,
code {
	font: inherit;
	letter-spacing: inherit;
	word-spacing: inherit;
}
button {
	cursor: pointer;
}
html {
	background: var(--cbg);
	color: var(--cfg);
	font: 30.6px/1.7 var(--fss);
}
body {
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	min-height: 100vh;
	text-rendering: optimizeLegibility;
}
h1,
h2,
h3,
h4 {
	font-family: var(--fh);
}
p,
li,
dt,
dd {
	font-family: var(--fs);
}
code,
pre {
	font-family: var(--fm);
	overflow: auto;
}
a {
	color: var(--cb);
}
a[target='_blank'] {
	cursor: alias;
}
a[target='_blank']::after {
	content: '\202F\279A';
	font-family: var(--fs);
}

minified: rjset.css

:root{--co:#eee;--cr:#ff4136;--cg:#2ecc40;--cb:#0074d9;--cc:#00bcd4;--cm:#e91e63;--cy:#ffdc00;--ck:#0a0b08;--cbg:#fff;--cbgrgb:255,255,255;--cfg:var(--ck);--fss:arial,'Helvetica Neue',helvetica,sans-serif;--fs:georgia,palatino,'Palatino Linotype',times,'Times New Roman',serif;--fh:'Proxima Nova','Montserrat','Arial Black','Arial Bold',gadget,sans-serif;--fm:'Courier New',courier,'Lucida Sans Typewriter','Lucida Typewriter',monospace;--s7:2.80492446em;--s6:2.243939568em;--s5:1.7951516544em;--s4:1.4361213235em;--s3:1.1488970588em;--s2:0.9191176471em;--s1:0.7352941176em;--s0:0.5882352941em;--s-1:0.4705882353em;--s-2:0.3764705882em}*,::after,::before{box-sizing:border-box}body,html{overflow:auto}blockquote,body,dd,dl,figure,h1,h2,h3,h4,li,p{margin:0}ol[class],ul[class]{list-style:none;margin:0;padding:0}button,code,input,pre,select,textarea{font:inherit;letter-spacing:inherit;word-spacing:inherit}button{cursor:pointer}html{background:var(--cbg);color:var(--cfg);font:30.6px/1.7 var(--fss)}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;text-rendering:optimizeLegibility}h1,h2,h3,h4{font-family:var(--fh)}dd,dt,li,p{font-family:var(--fs)}code,pre{font-family:var(--fm);overflow:auto}a{color:var(--cb)}a[target='_blank']{cursor:alias}a[target='_blank']::after{content:'\202F\279A';font-family:var(--fs)}