見かけるいろんなリセットCSS

*{
    box-sizing:border-box;
}
ul{
    list-style: none;
    margin:0;
}

h1,h2,h3,h4,h5,h6,p,span,button{
    margin:0;
    padding:0;
    font-weight:normal;
}

a{
    color:inherit; 
    text-decoration:none;   
}

body{
    color:#555;
    margin:0;
    line-height:1.6;
}

しっかり目

/* 
html5doctor.com Reset Stylesheet
v1.6.1
Last Updated: 2010-09-17
Author: Richard Clark - http://richclarkdesign.com 
Twitter: @rich_clark
*/

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

html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  outline: 0;
  font-size: 100%;
  font-weight: normal;
  vertical-align: baseline;
  background: transparent; }

body {
  line-height: 1; }

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block; }

nav, ul, li {
  list-style: none; }

blockquote, q {
  quotes: none; }

blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none; }

a {
  text-decoration: none;
  color: inherit;
  margin: 0;
  padding: 0;
  font-size: 100%;
  vertical-align: baseline;
  background: transparent; }

a:visited {
  color: inherti;
}

/* change colours to suit your needs */
ins {
  background-color: #ff9;
  color: #000;
  text-decoration: none; }

/* change colours to suit your needs */
mark {
  background-color: #ff9;
  color: #000;
  font-style: italic;
  font-weight: bold; }

del {
  text-decoration: line-through; }

abbr[title], dfn[title] {
  border-bottom: 1px dotted;
  cursor: help; }

table {
  border-collapse: collapse;
  border-spacing: 0; }

/* change border colour to suit your needs */
hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #cccccc;
  margin: 1em 0;
  padding: 0; }

input, select {
  vertical-align: middle; }