HTML Header bottom border does not wrap arround ToC, but the text does. How do I fix this?-CodePudding

I've got a ToC (Table of Content) table that's implemented as a Div. It uses the following HTML and CSS:

h3.articletitle {
    font-weight: bold;
    font-size: 30px;
    border-bottom: 1px solid #4F120B;
}

h4.articlesubtitle {
    font-weight: bold;
    font-size: 22px;
    border-bottom: 1px solid #4F120B;
}

h5.articlesubtitle {
    font-weight: bold;
    font-size: 18px;
    border-bottom: 1px solid #4F120B;
}

#toc_container {
    background: rgba(92, 9, 0, 0.14);
    border: 1px solid #4F120B;
    display: block;
    font-size: 90%;
    margin-bottom: 1em;
    margin-right: 1em;
    padding: 20px;
    width: auto;
}

<div >
<h3 >Title</h3>
<article>
<div style="float: left; margin-left: auto;" id="toc_container">
<p >Contents</p>
<ul >
<li><a  href="#Scociety">Scociety</a></li>
<ul>
<li><a href="#ArtHistory">Art</a></li>
<li><a href="#PopCulture">Pop Culture</a></li>
<li><a href="#HighCulture">High Culture</a></li>
<li><a href="#CommunicationAndTheSpreadOfIdeas">Communication And The Spread Of Ideas</a></li>
<li><a href="#Holidays">Holidays</a></li>
<li><a href="#GenderAndGenderRoles">Gender and Gender Roles</a></li>
<li><a href="#SubculturesAndAlternativeLifestyles">Subcultures and Alternative Lifestyles</a></li>
<li><a href="#UniversalFears">Universal Fears</a></li>
</ul>
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
<h4  id="Scociety">Scociety</h4>
<h5  id="ArtHistory">Art</h5>
<p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt.</p>
</div>

You can see how the border under the headers extends under the ToC's div. How do I get them to wrap with the text? I tried putting them in their own divs and adjusting the width via percentages, but that only worked fullscreen. When resizing, the borders will poke back into the ToC.

I'm new to web design, please keep explanations noob friendly.

CodePudding user response：

Adding the

.articlesubtitle {
    overflow: hidden;
}

rule solves the problem.

h3.articletitle {
    font-weight: bold;
    font-size: 30px;
    border-bottom: 1px solid #4F120B;
}

h4.articlesubtitle {
    font-weight: bold;
    font-size: 22px;
    border-bottom: 1px solid #4F120B;
}

h5.articlesubtitle {
    font-weight: bold;
    font-size: 18px;
    border-bottom: 1px solid #4F120B;
}

.articlesubtitle {
    overflow: hidden;
}

#toc_container {
    background: rgba(92, 9, 0, 0.14);
    border: 1px solid #4F120B;
    display: block;
    font-size: 90%;
    margin-bottom: 1em;
    margin-right: 1em;
    padding: 20px;
    width: auto;
}

<div >
<h3 >Title</h3>
<article>
<div style="float: left; margin-left: auto;" id="toc_container">
<p >Contents</p>
<ul >
<li><a  href="#Scociety">Scociety</a></li>
<ul>
<li><a href="#ArtHistory">Art</a></li>
<li><a href="#PopCulture">Pop Culture</a></li>
<li><a href="#HighCulture">High Culture</a></li>
<li><a href="#CommunicationAndTheSpreadOfIdeas">Communication And The Spread Of Ideas</a></li>
<li><a href="#Holidays">Holidays</a></li>
<li><a href="#GenderAndGenderRoles">Gender and Gender Roles</a></li>
<li><a href="#SubculturesAndAlternativeLifestyles">Subcultures and Alternative Lifestyles</a></li>
<li><a href="#UniversalFears">Universal Fears</a></li>
</ul>
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
<h4  id="Scociety">Scociety</h4>
<h5  id="ArtHistory">Art</h5>
<p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt.</p>
</div>

CodePudding user response：

Adding "overflow: hidden;" to the CSS for headers resulted in the expected behavior.