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CSS

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HTML 

              
                <body class="d-flex flex-column h-100" data-bs-theme="dark">
  <header class="border-bottom border-black fixed-top bg-gradient" id="header">
    <div class="region region-header">
      <nav class="navbar navbar-expand-md">
        <div class="container">
          <!-- Site logo -->
          <a href="/" rel="home" class="site-logo navbar-brand">
            <img src="data:image/svg+xml,%3Csvg version='1.1' id='Logo' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 445 232' style='enable-background:new 0 0 445 232;fill:black;' xml:space='preserve'%3E%3Cg%3E%3Cpolygon points='34.6,0 0.1,0 67,116 0.1,232 34.6,232 34.6,232 84.3,232 84.3,202 51.9,202 84.3,145.9 134,232 168.5,232 '/%3E%3Cpolygon points='168.5,0 149.3,0 134,0 84.5,0 84.5,30 116.7,30 87.3,81.1 104.5,111 '/%3E%3Cpath d='M177,153.6l-28.7-96.5H172l17.3,65.8l17.3-65.8h21.7l-28.7,96.5v47.8H177L177,153.6L177,153.6z'/%3E%3Cpath d='M235.5,57.2h22.7v123.7h37.3v20.6h-60L235.5,57.2L235.5,57.2z'/%3E%3Cpath d='M300.7,91.8c0-23.1,12.2-36.3,34.4-36.3s34.4,13.2,34.4,36.3v75.1c0,23.1-12.2,36.3-34.4,36.3s-34.4-13.2-34.4-36.3V91.8z M323.4,168.3c0,10.3,4.5,14.2,11.8,14.2c7.2,0,11.8-3.9,11.8-14.2V90.3c0-10.3-4.5-14.2-11.8-14.2c-7.2,0-11.8,3.9-11.8,14.2 V168.3z'/%3E%3Cpath d='M374.8,57.2h70.1v20.6h-23.7v123.7h-22.7V77.8h-23.7L374.8,57.2L374.8,57.2z'/%3E%3C/g%3E%3C/svg%3E" alt="Home" height="50">
          </a>
          <!-- Navbar toggler (mobile) -->
          <button class="navbar-toggler px-3 py-2" data-bs-toggle="collapse" data-bs-target="#header-contents" aria-controls="header-contents" aria-expanded="false" aria-label="Toggle navigation">
            <i class="xi-menu"></i>
<!--             <span class="navbar-toggler-icon"></span> -->
          </button>
          <!-- Header contents (menus, etc.) -->
          <div class="collapse navbar-collapse flex-column flex-md-row align-items-center justify-content-center" id="header-contents">
            <!-- Main nav menu -->
            <ul class="navbar-nav me-auto pe-3 gap-1">
              <li class="nav-item"><a href="/people" class="nav-link">People</a></li>
              <li class="nav-item"><a href="/wrestlers" class="nav-link active" aria-current="page">Wrestlers</a></li>
              <li class="nav-item"><a href="/articles" class="nav-link">Articles</a></li>
              <li class="nav-item"><a href="/social" class="nav-link">Social</a></li>
              <li class="nav-item"><a href="/forum" class="nav-link">Forums</a></li>
              <li class="nav-item"><a href="/links" class="nav-link">Links</a></li>
            </ul>
            <!-- QuickBrowse search bar -->
            <form class="me-1 me-lg-3" role="search">
              <input type="search" class="form-control form-control-sm" placeholder="QuickBrowse..." aria-label="Quick Browse">
            </form>
            <!-- User account menu -->
            <div class="dropdown text-end">
              <button class="btn d-block link-dark text-decoration-none dropdown-toggle" data-bs-toggle="dropdown" data-bs-target="#user-menu" aria-expanded="false">
                <img src="https://github.com/mdo.png" alt="mdo" width="32" height="32" class="rounded-circle">
              </button>
              <ul class="dropdown-menu dropdown-menu-end text-small" id="user-menu">
                <li><a class="dropdown-item" href="#">My profile</a></li>
                <li><a class="dropdown-item" href="#">Settings</a></li>
                <li><hr class="dropdown-divider"></li>
                <li><a class="dropdown-item" href="#">Log out</a></li>
              </ul>
            </div>
          </div>
        </div>
      </nav>
    </div>
  </header>
  <main id="main" class="flex-grow-1 py-2">
    <!-- Breadcrumb Region -->
    <div class="region region-breadcrumb container">
      <nav aria-label="breadcrumb" class="rounded-3 bg-darker bg-opacity-40 px-3 py-2 mt-2 mb-3">
        <ol class="breadcrumb plain-links mb-0 d-flex align-items-baseline" id="breadcrumb">
          <li><a href="/" class="link-icon">
            <i class="xi-home"></i>
            <span class="sr-only">Home</span>
          </a></li>
          <li><a href="/wrestlers">Wrestlers</a></li>
          <li><a href="/wrestlers/wwe">WWE</a></li>
          <li class="active" aria-current="page">
            <span class="text-muted">X-Pac</span>
          </li>
        </ol>
      </nav>
    </div>
    <!-- Main Content Region -->
    <div id="main-content" class="container d-flex">
      <!-- Profile image (side) -->
      <aside id="image" class="flex-shrink-0 col-2 col-md-3 pe-md-4 pe-2 pb-3">
        <img src="https://i.imgur.com/PNzsvLl.png" alt="X-Pac">
      </aside>

      <!-- Main body -->
      <article id="bio" class="flex-grow-1 col-8 col-md-9">
        <!-- Title/name & org logo -->
        <div id="title-name" class="d-flex align-items-center py-2 justify-content-between">
          <div class="page-title w-100">
            <h1 class="mb-0 d-flex align-items-center">
              <span>X-Pac</span>
              <span class="text-size-3 ms-auto pb-1">
                <a href="/people/sean-waltman/wwe">Entire WWE listing</a>
              </span>
              <i class="xi-arrow-right-circle ms-3 me-4 text-size-4"></i>
            </h1>
          </div>
          <a href="/wrestlers/wwe" aria-label="Back to WWE Wrestlers" class="h-100 rounded-4 border border-secondary bg-dark p-2 go-back-up"><img src="https://image.ibb.co/d7bGxJ/WWE_Logo_100x100_x2.png" width="50"></a>
        </div>
        <!-- Gimmick infobar -->
        <div id="info-bar" class="d-flex align-items-center gap-2 gap-md-4 color-links mb-4">
          <!-- <- -->
          <div class="arrow-left fs-4">
            <i class="xi-arrow-left"></i>
          </div>
          <!-- Previous Gimmick -->
          <div class="gimmick-prev w-25">
            <div class="text-small text-bold text-white">Previous gimmick:</div>
            <div>
              <a href="/wrestlers/wcw/syxx">Syxx</a>
              (<a href="/wrestlers/wcw">WCW</a>)
            </div>
          </div>
          <!-- Next Gimmick -->
          <div class="gimmick-next">
            <div class="text-small text-bold text-white">Next gimmick:</div>
            <div>
              <a href="/wrestlers/xpw/x">X</a>
              (<a href="/wrestlers/xpw">XPW</a>)
            </div>
          </div>
          <!-- -> -->
          <div class="arrow-right fs-4">
            <i class="xi-arrow-right"></i>
          </div>
          <!-- Real Name -->
          <div class="real-name flex-grow-1 text-end">
            <div class="text-small text-bold text-white">Real name:</div>
            <div>
              <a href="/people/sean-waltman">Sean Waltman</a>
            </div>
          </div>
          <!-- Bio Toggle -->
          <div class="bio-toggle align-self-end">
            <button class="btn btn-link icon rounded-circle toggle-bio-text" data-bs-toggle="collapse" data-bs-target="#bio-text" aria-expanded="true" aria-controls="bio-text" aria-label="Expand/collapse Bio Text area">
              <i class="xi-chevron-up when-expanded"><span class="sr-only">Collapse bio</span></i>
              <i class="xi-chevron-down when-collapsed"><span class="sr-only">Expand bio</span></i>
            </button>
          </div>
        </div>
        <!-- Bio -->
        <div id="bio-text" class="collapse show">
          <div class="bio-container d-flex">
            <div class="bio-stats col-8 pe-4">
              <h2>Stats</h2>
              <ul class="wrestler-stats list-unstyled">
                <li class="text-muted">
                  <span class="fw-bold">Birthday:</span>
                  July 13, 1972
                </li>
                <li class="text-muted">
                  <span class="fw-bold">Birthplace:</span>
                  Minneapolis, Minnesota
                </li>
                <li class="border-top mt-2 pt-2">
                  <strong>Billed From:</strong>
                  Minneapolis, Minnesota
                </li>
                <li>
                  <strong>Height:</strong>
                  6 ft 1 in (185 cm)
                </li>
                <li>
                  <strong>Weight:</strong>
                  212 lb (96 kg)
                </li>
                <li>
                  <strong>Trained By:</strong>
                  <a href ="/people/eddie-sharkey">Eddie Sharkey</a>,
                  <a href="/people/boris-malenko">Boris Malenko</a>
                </li>
              </ul>
              <ul class="wrestler-timeline list-unstyled">
                <li><strong>First Appearance:</strong> <a href="/shows/wwe/monday-night-raw">Monday Night Raw</a> (March 30, 1998) <em class="text-secondary">&mdash; night after WM 14</em></li>
                <li><strong>Final Appearance:</strong> <a href="/shows/wwe/monday-night-raw">Monday Night Raw</a> (July 8, 2002) <em class="text-secondary">&mdash; night of Nash's quad tear</em></li>
              </ul>
            </div>
            <div class="bio-text  col-4">
              <h2>Bio</h2>
              <p class="wrestler-bio">
                Following a neck injury, <strong>Sean Waltman</strong> was released from his <a href="/companies/world-championship-wrestling">WCW</a> contract by president <a href="/people/eric-bischoff">Eric Bischoff</a> and immediately returned to <strong>WWE</strong> as the newest recruit of <a href="/wrestlers/wwe/d-generation-x">D-Generation X</a>. Undergoing yet another name change, he became <strong>X-Pac</strong>, a brash, lewd Superstar who backed up his big mouth in the ring.
            </p>
            </div>
          </div>
        </div>
        <!-- Themes -->
        <h2>Themes</h2>
        <ul class="nav nav-pills mb-3" id="theme-category--tabs" role="tablist">
          <li class="nav-item" role="presentation">
            <button class="nav-link active" id="theme-category-entrance-tab" data-bs-toggle="pill" data-bs-target="#theme-category-entrance" type="button" role="tab" aria-controls="theme-category-entrance" aria-selected="true">Entrance</button>
          </li>
          <li class="nav-item" role="presentation">
            <button class="nav-link" id="theme-category-exit-tab" data-bs-toggle="pill" data-bs-target="#theme-category-exit" type="button" role="tab" aria-controls="theme-category-exit" aria-selected="false">Exit</button>
          </li>
          <li class="nav-item" role="presentation">
            <button class="nav-link" id="theme-category-parody-tab" data-bs-toggle="pill" data-bs-target="#theme-category-parody" type="button" role="tab" aria-controls="theme-category-parody" aria-selected="false">Parody</button>
          </li>
        </ul>
        <div class="tab-content" id="theme-category--contents">
          <div class="tab-pane theme-category fade show active" id="theme-category-entrance" role="tabpanel" aria-labelledby="theme-category-entrance-tab" tabindex="0">
            <h3 class="sr-only" tabindex="0">Entrance</h3>
            <ol class="theme-listing m-0 p-0">

              <!-- Theme Listing #1 -->
              <li class="d-flex flex-row flex-wrap align-items-center">
                <!-- Title & controls -->
                <div class="theme-line d-flex flex-row align-items-center">
                  <!-- Theme title, artist, etc. -->
                  <span class="theme-title">
                    <em><a href="/wrestlers/wwe/shawn-michaels">[Shawn Michaels 6th]</a></em> ⇒
                    <strong>“Are You Ready?” (Intro Cut)</strong>
                    <small>by</small>
                    <span class="theme-artists">
                      <a href="/artists/jim-johnston">Jim Johnston</a>,
                      <a href="/artists/chris-warren">Chris Warren</a>
                    </span>
                  </span>
                  <!-- Hover tools (show infobox, lyrics, etc.) -->
                  <span class="hover-tools d-flex ms-auto align-items-center">
                    <!-- Toggle Infobox Collapse -->
                    <a href="#infobox_12345" title="More information" data-bs-toggle="collapse" role="button" class="btn btn-link icon rounded-circle toggle-infobox" aria-expanded="false" aria-controls="infobox_12345"><i class="xi-info"><span class="sr-only">View more info</span></i></a>
                    <!-- Toggle Lyrics Offcanvas -->
                    <a href="#lyrics_12345" title="View lyrics" data-bs-toggle="offcanvas" role="button" class="btn btn-link icon rounded-circle toggle-lyrics" aria-controls="lyrics_12345"><i class="xi-file-text-o"><span class="sr-only">View lyrics</span></i></a>
                  </span>
                </div>
                <!-- Infobox -->
                <div id="infobox_12345" class="theme-infobox collapse w-100">
                  <div class="theme-infobox-contents card card-body bg-dark rounded-4 p-3 m-2 text-small">
                    <div class="theme-artists">
                      <strong>Artist(s):</strong>
                      <span>Jim Johnston feat. Chris Warren</span>
                    </div>
                    <div class="theme-albums">
                      <strong>Album(s):</strong>
                      <span>WWF: The Music, Vol. 3</span>
                    </div>
                    <div class="theme-first-use">
                      <strong>First used:</strong>
                      <span>RAW is WAR (Mar 30, 1998)</span>
                    </div>
                    <div class="theme-notes d-flex">
                      <div class="flex-shrink-1 me-1"><strong>Notes:</strong></div>
                      <div>
                        Alternate title: "Break It Down" - WWE: Anthology<br>
                        <em class="text-muted">Usage starts at 0:23</em>
                      </div>
                    </div>
                    <div class="theme-video-proof">
                      <strong>Video Proof:</strong><br>
                      <iframe width="400" height="224" class="rounded-3 mx-auto border" src="https://www.youtube.com/embed/vU7mP3LZ86U?start=240" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen=""></iframe>
                    </div>
                  </div>
                </div>
              </li>

              <!-- Theme Listing #2 -->
              <li class="d-flex flex-row flex-wrap align-items-center">
                <div class="theme-line d-flex flex-row align-items-center">
                  <span class="theme-title color-links">
                    <strong>“Make Some Noise”</strong>
                    <small>by</small>
                    <a href="/artists/jim-johnston">Jim Johnston</a>,
                    <a href="/artists/chris-warren">Chris Warren</a>,
                    <a href="/artists/lucky-luke">Lucky Luke</a>,
                    <a href="/artists/prince-michael">Prince Michael</a>
                  </span>
                  <span class="hover-tools d-flex ms-auto">
                    <a href="#infobox_12346" title="More information" data-bs-toggle="collapse" role="button" class="btn btn-link icon rounded-circle toggle-infobox" aria-expanded="false" aria-controls="infobox_12346"><i class="xi-info"><span class="sr-only">View more info</span></i></a>
                    <a href="#lyrics_12346" title="View lyrics" data-bs-toggle="offcanvas" role="button" class="btn btn-link icon rounded-circle toggle-lyrics" aria-controls="lyrics_12346"><i class="xi-file-text-o"><span class="sr-only">View lyrics</span></i></a>
                  </span>
                </div>
              </li>

              <!-- Theme Listing #... -->
              <li class="d-flex flex-row flex-wrap align-items-center">
                ...
              </li>

            </ol>
          </div>
          <div class="tab-pane fade" id="theme-category-exit" role="tabpanel" aria-labelledby="theme-category-exit-tab" tabindex="0">
            <h3 class="sr-only" tabindex="0">Exit</h3>
            <p>Content here.</p>
          </div>
          <div class="tab-pane fade" id="theme-category-parody" role="tabpanel" aria-labelledby="theme-category-parody-tab" tabindex="0">
            <h2 class="sr-only" tabindex="0">Parody</h2>
            <p>Content here.</p>
          </div>
        </div>
      </article>
    </div>
  </main>
  <footer id="footer" class="footer mt-auto py-5 bg-black">
    <div class="region region-footer container d-flex">
      <div>
        Lorem ipsum footer left.
      </div>
      <div class="ms-auto">
        Lorem ipsum footer right.
      </div>
    </div>
  </footer>
  
  <div class="offcanvas offcanvas-end" tabindex="-1" id="lyrics_12345" aria-labelledby="lyrics_12345_title">
    <div class="offcanvas-header">
      <h5 class="offcanvas-title" id="lyrics_12345_title">Lyrics: &ldquo;Are You Ready?&rdquo; (Intro Cut)</h5>
      <button type="button" class="btn-close" data-bs-dismiss="offcanvas" aria-label="Close"></button>
    </div>
    <div class="offcanvas-body px-4 text-small">
      <p>
        Break it down
      </p>
      <p>
        Degenerate into something fool<br>
        We just got tired of doing what you told us to do<br>
        That's the breaks boy<br>
        Yeah, that's the breaks, little man<br>
        Break it down
      </p>
      <p>
        D-Generation X!<br>
        D-Generation!
      </p>
      <p>
        You think you can tell me what to do?<br>
        You know who you're talking to?<br>
        Well, you better get used to the way the ball bounces<br>
        I see what you got, it measures in ounces<br>
        But that's the breaks, boy<br>
        Yeah, that's the breaks, little man<br>
        Break it down
      </p>
      <p>
        D-Generation X!<br>
        D-Generation!
      </p>
      <p>
        You think you're a big man?<br>
        I'll treat you like you're a little man
      </p>
      <p>
        Yeah<br>
        Break it down
      </p>
      <p>
        Yo, tell me what it's like to be half a man<br>
        It must break your heart to see what I am<br>
        But, that's the breaks, boy<br>
        Yeah, that's the breaks, little man
      </p>
      <p>
        Break it down
      </p>
      <p>
        D-Generation X!<br>
        D-Generation!
      </p>
      <p>
        You think you can tell me what to do?<br>
        You know who you're talking to?<br>
        Just stop wanting me to be someone else<br>
        Put it away like a book on a shelf<br>
        That you can't read boy<br>
        Yeah, that you can't read, little man
      </p>
    </div>
  </div>
</body>
!

CSS 

              
                $link-color: #3cf;

body {
  font-family: 'Roboto', sans-serif;
  counter-reset: themes;
}
strong, em {
  color: white;
}
[data-bs-theme=dark] {
  --bs-body-color: #fff;
  --bs-body-color-rgb: 255,255,255;
  --bs-body-bg: #17242c;
  --bs-body-bg-rgb: 23,36,44;
  
  .dropdown-menu {
    --bs-dropdown-link-hover-bg: #069;
  }
  
  .navbar {
    --bs-navbar-nav-link-padding-x: 0.5rem;
    
    @media (min-width: 992px) {
      --bs-navbar-nav-link-padding-x: 1rem;
    }
    
  } // .navbar
  
  .nav-link {
    --bs-nav-link-font-size: 0.75rem;
    
    @media (min-width: 992px) {
      --bs-nav-link-font-size: 1rem;
    }
    
  } // .nav-link
  
  .navbar-toggler {
    --bs-navbar-color: var(--bs-body-bg);
    --bs-navbar-toggler-border-color: var(--bs-navbar-color);
  }
  
} // DARK THEME
main, footer {
  color: #ccc;
  
  img, video {
    max-width: 100%;
    height: auto;
  }
  
  img, svg, video, canvas, audio, iframe, embed, object {
    display: block;
    vertical-align: middle;
  }
  
  h1, h2, h3, h4, h5, h6,
  .h1, .h2, .h3, .h4, .h5, .h6 {
    color: white;
    font-family: 'Patua One', serif;
  }
}
header.fixed-top + main {
  margin-top: 76px;
}

/// BASIC ///
.sr-only:not(:focus):not(:active) {
  clip: rect(0 0 0 0); 
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap; 
  width: 1px;
}

/// FONT SIZES ///
// Relative sizing.
.text-small {
  font-size: 87.5%;
}
.text-xs, .text-tiny {
  font-size: 75%;
}
.text-micro {
  font-size: 66.6667%;
}
// Ranged sizing (0.5 – 2.5 rem).
@for $i from 0 through 8 {
  .text-size-#{$i} {
    font-size: #{($i + 2) / 4}rem;
  }
}

/// COLLAPSE TOGGLE ICONS ///
[data-bs-toggle=collapse] {
  &[aria-expanded=true] i.when-collapsed,
  &[aria-expanded=false] i.when-expanded {
    display: none;
  }
}

.btn.btn-link.icon {
  text-decoration: none;
  line-height: 1.75rem;
  height: 2.5rem;
  width: 2.5rem;
  
  &.toggle-bio-text {
    border: 1px solid #09f9;
    
    &:hover,
    &:active {
      border-color: #09f;
    }
    
  } // &.toggle-bio-text
  
  &:hover,
  &:active {
    background: #09f6;
    
    i {
      color: white;
    }
  }
  
} // link icons

/// ALT COLORS ///
.bg-gradient {
  background-image: linear-gradient(160deg, #009bf5 0%, #80d0c7 100%) !important;
}
.bg-darker {
  background: #0006 !important;
}

/// HEADER ///
#header {
  
  ul.navbar-nav {
    
    li.nav-item {
      
      a.nav-link {
        border-radius: 0.5rem;
        color: black;
        
        &:hover {
          background: var(--bs-body-bg);
          color: #09f;
        }
        
        &.active {
          background: #fff6;
          color: black;
        }
        
      } // a.nav-link
      
      + li.nav-item {
        margin-left: 0.25rem;
      }
      
    } // li.nav-item
    
  } // ul.navbar-nav
  
} // #header

/// BREADCRUMB ///
#breadcrumb {
  
  li {
    line-height: 1;
    
    + li {
      margin-left: 0.5rem;

      &::before {
        content: '\00BB ';
        margin-right: 0.5rem;
      }

    } // + li
    
  } // li
  
} // .breadcrumb

/// PERSON/WRESTLER PROFILE IMAGE ///
#image {
  
  img {
    position: sticky;
    top: 6rem;
  }
  
} // #image

/// TITLE/NAME & ORG LOGO ///
#title-name {
  background-color: var(--bs-body-bg);
  height: 5rem;
  position: sticky;
  top: 4.75rem;

  // Page title/name
  .page-title {

    h1 {}

  } // .page-title
  
  // "Back to [Org] [Type]" logo link
  .go-back-up {}

} // #title-name

/// BIO & THEMES ///
#bio {
    
  .theme-category {
    
    ol.theme-listing {
      list-style-type: none;
      
      li {
        border-radius: 1.25rem;
        line-height: 2.5rem;
        min-height: 2.5rem;
        
        + li {
          margin-top: 0.25rem;
        }
        
        &::before {
          background: #09f;
          border-radius: 50%;
          box-shadow: 2px 2px 2px #0006;
          counter-increment: themes;
          content: counter(themes);
          color: #000;
          font-weight: bold;
          height: 1.5rem;
          line-height: 1.5rem;
          margin: 0.25rem 0.5rem;
          max-height: 1.5rem;
          min-width: 1.5rem;
          text-align: center;
          width: 1.5rem;
        }
        
        &.infobox-opened::before {
          background: white;
        }
        
        &:hover {
          background: #09f1;
          box-shadow: 0 0 2px #0cf;
        }
        
        &.infobox-opened {
          background: #09f3;
          box-shadow: 0 0 3px #fff;
        }
        
        .theme-line {
          width: calc(100% - 2.5rem);
          
          .theme-title {
            line-height: 1rem;
            
            .theme-artists a {
              white-space: nowrap;
            }
            
          } // .theme-title
          
          .hover-tools {
            
            .btn.btn-link.icon {
              width: 2rem;
              height: 2rem;
              margin: 0.25rem 0.25rem 0.25rem 0;
              line-height: 1.25rem;
              display: flex;
              justify-content: center;
            }
            
          } // .hover-tools
          
        } // .theme-line
        
        .theme-infobox {
          transition: all 0.5s ease-in-out;
          line-height: 1.5rem;
        }
        
        &.infobox-opened .theme-line .hover-tools {
          display: flex !important;
          
          .toggle-infobox {
            border-color: $link-color;
            
            i {
              color: white;
            }
            
          } // .toggle-infobox
          
        } // .hover-tools (within .infobox-opened)
        
        &:not(:hover) .hover-tools {
          display: none !important;
        }
        
      } // li
      
    } // ol.theme-listing
    
  } // .theme-category
  
} // #bio

/// OPACITY HELPERS ///
$opacities: 10 20 30 40 50 60 70 80 90 100;
@each $opac in $opacities {
  .opacity-#{$opac},
  .o-#{$opac} {
    opacity: #{$opac / 100};
  }
}

/// LINKS ///
a {
  cursor: pointer;
  
  header & {
    font-weight: 600;
  }
  
  main &,
  footer & {
    color: $link-color;
    text-decoration: none;

    &:hover,
    &:active {
      color: white;
      text-decoration: underline;
    }

  } // main/footer links
  
  &.link-icon {
    text-decoration: none !important;
    
    &:hover,
    &:active {
      
      i:before {
        color: white;
      }
      
    } // hover/active
    
  } // &.link-icon
  
} // a

.btn.btn-link i {
  color: $link-color;
  text-decoration: none;
}

/// HELPERS ///
.left-0 {
  left: 0;
}
.right-0 {
  right: 0;
}
.top-0 {
  top: 0;
}
.bottom-0 {
  bottom: 0;
}
!

JS 

              
                $(function() {
  
  // Prevent links from going anywhere.
  $('a').on('click', e => {
    e.preventDefault();
    return false;
  });
  
  // Toggling infobox also toggles parent <li> marker bg color.
  $('.toggle-infobox').on('click', e => {
    $(e.currentTarget).parents('li').toggleClass('infobox-opened');
  });
  
});
!
999px

Console