Reference: the default html css style attribute of the browser

This "Default html css style attribute of the browser" is useful when you need to restore the default value. Apply the wildcard selector * {margin: 0; padding: 0;} at the beginning. When you need to use the margin, You need to restore the default html css value.

I have been searching for this document all the time. I saw it on w3. In addition to the definition of inline and block, the main thing is to pay attention to the body | h1 ~ H6 | blockquote | menu | ul | ol | default style (margin and font-size) of the dd and other labels ).

Code

html, address, 
blockquote, 
body, dd, div, 
dl, dt, fieldset, form, 
frame, frameset, 
h1, h2, h3, h4, 
h5, h6, noframes, 
ol, p, ul, center, 
dir, hr, menu, pre   { display: block } 
li              { display: list-item } 
head            { display: none } 
table           { display: table } 
tr              { display: table-row } 
thead           { display: table-header-group } 
tbody           { display: table-row-group } 
tfoot           { display: table-footer-group } 
col             { display: table-column }  
colgroup        { display: table-column-group } 
td, th          { display: table-cell; } 
caption         { display: table-caption } 
th              { font-weight: bolder; text-align: center } 
caption         { text-align: center } 
body            { margin: 8px; line-height: 1.12 } 
h1              { font-size: 2em; margin: .67em 0 } 
h2              { font-size: 1.5em; margin: .75em 0 } 
h3              { font-size: 1.17em; margin: .83em 0 } 
h4, p, 
blockquote, ul, 
fieldset, form, 
ol, dl, dir, 
menu            { margin: 1.12em 0 }  

h5              { font-size: .83em; margin: 1.5em 0 } 
h6              { font-size: .75em; margin: 1.67em 0 } 
h1, h2, h3, h4, 
h5, h6, b, 
strong          { font-weight: bolder } 
blockquote      { margin-left: 40px; margin-right: 40px } 
i, cite, em, 
var, address    { font-style: italic } 
pre, tt, code, 
kbd, samp       { font-family: monospace } 
pre             { white-space: pre } 
button, textarea, 
input, object,  
select          { display:inline-block; } 
big             { font-size: 1.17em } 
small, sub, sup { font-size: .83em } 
sub             { vertical-align: sub }  
sup             { vertical-align: super } 
table           { border-spacing: 2px; } 
thead, tbody, 
tfoot           { vertical-align: middle } 
td, th          { vertical-align: inherit } 
s, strike, del  { text-decoration: line-through } 
hr              { border: 1px inset } 
ol, ul, dir, 
menu, dd        { margin-left: 40px } 
ol              { list-style-type: decimal } 
ol ul, ul ol, 
ul ul, ol ol    { margin-top: 0; margin-bottom: 0 } 
u, ins          { text-decoration: underline } 
br:before       { content: "\A" } 
:before, :after { white-space: pre-line }  

center          { text-align: center } 
abbr, acronym   { font-variant: small-caps; letter-spacing: 0.1em } 
:link, :visited { text-decoration: underline } 
:focus          { outline: thin dotted invert } 

/* Begin bidirectionality settings (do not change) */ 
BDO[DIR="ltr"]  { direction: ltr; unicode-bidi: bidi-override } 
BDO[DIR="rtl"]  { direction: rtl; unicode-bidi: bidi-override } 

*[DIR="ltr"]    { direction: ltr; unicode-bidi: embed } 
*[DIR="rtl"]    { direction: rtl; unicode-bidi: embed } 

@media print { 
  h1            { page-break-before: always } 
  h1, h2, h3, 
  h4, h5, h6    { page-break-after: avoid } 
  ul, ol, dl    { page-break-before: avoid }