Minimal CSS reset

reset.css

/* Box sizing rules */
* {
  box-sizing: border-box;
}

*:before,
*:after {
  box-sizing: inherit;
}

/* Remove margin and padding from elements */
body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
li,
dd,
figure,
figcaption,
dl,
dd,
dt {
  margin: 0px;
  padding: 0px;
}

body {
  /* Hide persistent scrollbar in IE (10/11) and Edge */
  -ms-overflow-style: -ms-autohiding-scrollbar;

  /* Anchor links will transition rather than skip */
  scroll-behavior: smooth;

  /* Reset font size to 1rem, in case it has a pixel value */
  font-size: 1rem;

  min-height: 100vh;
}

/* Remove list styles on ul, ol elements with a class attribute */
ul[class],
ol[class] {
  list-style: none;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
  text-decoration: underline;
  text-decoration-skip-ink: auto;
  cursor: pointer;
}
/* Turn off the recent search in WebKit. */
::-webkit-search-decoration {
  display: none;
}

/* Normalise form field line-height in WebKit */
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder,
select::-webkit-input-placeholder {
  line-height: normal;
}

/* Make a search box appear like a text box */
input[type='search'] {
  -webkit-appearance: textfield;
}

/* Make images responsive */
img {
  max-width: 100%;
}

/* Remove _all_ animations and transitions for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
  * {
    -webkit-animation: none !important;
            animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

reset.min.css

*{box-sizing:border-box}:after,:before{box-sizing:inherit}body,dd,dl,dt,figcaption,figure,h1,h2,h3,h4,li,ol,p,ul{margin:0;padding:0}body{-ms-overflow-style:-ms-autohiding-scrollbar;scroll-behavior:smooth;font-size:1rem;min-height:100vh}ol[class],ul[class]{list-style:none}a:not([class]){text-decoration:underline;text-decoration-skip-ink:auto;cursor:pointer}::-webkit-search-decoration{display:none}input::-webkit-input-placeholder,select::-webkit-input-placeholder,textarea::-webkit-input-placeholder{line-height:normal}input[type=search]{-webkit-appearance:textfield}img{max-width:100%}@media (prefers-reduced-motion:reduce){*{-webkit-animation:none!important;animation:none!important;transition:none!important;scroll-behavior:auto!important}}