lement.style { } a { color: #337ab7; text-decoration: none; } a { background-color: transparent; } * { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } Atributo style { text-align: center; } body { font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.42857143; color: #333; background-color: #fff; } html { font-size: 10px; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); } html { font-family: sans-serif; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; } :after, :before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } :after, :before { -webkit-box-sizing: border-box; -moz-box-sizing Box Model addition in CSS3. : border-box; box-sizing: border-box; }