HTML tutorial, HTML default style

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: 8 px ; line-height: 1.12 } h1 { font-size: 2 em ; margin: .67 em 0 } h2 { font-size: 1.5 em ; margin: .75 em 0 } h3 { font-size: 1.17 em ; margin: .83 em 0 } h4 , p , blockquote , ul , fieldset , form , ol , dl , dir , menu { margin: 1.12 em 0 } h5 { font-size: .83 em ; margin: 1.5 em 0 } h6 { font-size: .75 em ; margin: 1.67 em 0 } h1 , h2 , h3 , h4 , h5 , h6 , b , strong { font-weight: bolder } blockquote { margin-left: 40 px ; margin-right: 40 px } 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: 1.17 em } small , sub , sup { font-size: .83 em } sub { vertical-align: sub } sup { vertical-align: super } table { border-spacing: 2 px ; } thead , tbody , tfoot { vertical-align: middle } td , th { vertical-align: inherit } s , strike , del { text-decoration: line-through } hr { border: 1 px inset } ol , ul , dir , menu , dd { margin-left: 40 px } 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: 0.1 em } :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 }