modnorm.min.css

progress,sub,sup{vertical-align:baseline}*,::after,::before{box-sizing:border-box}html{line-height:1.15;-webkit-text-size-adjust:100%;-moz-tab-size:4;tab-size:4}body{margin:0;font-family:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif,'Apple Color Emoji','Segoe UI Emoji'}hr{height:0;color:inherit}abbr[title]{text-decoration:underline dotted}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:ui-monospace,SFMono-Regular,Consolas,'Liberation Mono',Menlo,monospace;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit}button,input,optgroup,select,textarea{font-family:inherit;font-size:100%;line-height:1.15;margin:0}button,select{text-transform:none}[type=button],[type=reset],[type=submit],button{-webkit-appearance:button;appearance:button;}::-moz-focus-inner{border-style:none;padding:0}:-moz-focusring{outline:ButtonText dotted 1px}:-moz-ui-invalid{box-shadow:none}legend{padding:0}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none;appearance:none;}::-webkit-file-upload-button{-webkit-appearance:button;appearance:button;font:inherit}summary{display:list-item}html{font-size:62.5%;}body{font-size:1.6rem;}img{width:100%;height:auto;user-select:none;}button{color:inherit;}a,button{touch-action: manipulation;}svg{height:100%;width:100%;fill:currentColor;pointer-events:none;}iframe,video{height:100%;width:100%}

Just a minified version of modern-normalize with a few minor additions of my own at the end. All credit to sindresorhus: https://github.com/sindresorhus/modern-normalize for the original work.