css - the "pseudo element :after" part of an element is overriding overflow-x:hidden -


i have built sample 2 arrows. arrows built standard boxes - 1 h2 1 p 

<header>     <h2 class="maintitle">test</h2>     <p class="subtitle">test test</p> </header>

each box has 2 pseudo elements :before , :after. 1 creates rectangle other extends box towards page border borderless arrow. used css looks that. 

  html,   body {     overflow-x:hidden;   }    .wrap {     width: 50em;     margin: 0 auto;   }    section {     margin-top:6em;     width:100%;     background-color: green;     height:30em;   }    .maintitle,   .subtitle {     height: 3.5rem;     line-height: 3.5rem;     position:relative;   }    .maintitle {     background-color: orange;     padding-left:1rem;     top: -1.77rem;     text-align: left;     &:before {         content: "";         position:absolute;         top:0;         bottom:0;         width: 999em;         right:100%;       background-color: orange;     }     &:after {         content: "";         position:absolute;         top:0;         bottom:0;         width:999em;         left:100%;     }   }    .subtitle {     text-align: left;     left:0;     top:-1.77rem;     padding-left: 3rem;       background-color: grey;      &:before {         content: "";         position:absolute;         top:0;         bottom:0;         width: 999em;         right:100%;     }     &:after {         content: "";         position:absolute;         top:0;         bottom:0;         width: 999em;         left:100%;     background-color: grey;      }    }    @media(min-width: 800px) {     .maintitle {          text-align: right;         padding-right:1rem;         &:after {              right:-1.75rem;             width:0;             height:0;             background:transparent;             border-top: 1.8rem solid transparent;             border-left: 1.8rem solid orange;             border-bottom: 1.8rem solid transparent;        }     }     .subtitle {         top: 0;         left:1.75rem;         padding-left: 1rem;        &:before {             left:-1.75rem;             width:0;             height:0;             background:transparent;             border-top: 1.77rem solid transparent;             border-right: 1.77rem solid grey;             border-bottom: 1.77rem solid transparent;         }      }   }

a pen showing output here

problem pseudo element of grey arrow on right ignoring overflow-x:hidden statement in e.g. safari (in chrome works). if click mouse , drag right that:

overflow-x gets ignored

if remove pseudo element on right , enlarge width of grey box extensively respects overflow-x:hidden shown in following pen. there way work .subtitle:after version too?


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