web/assets/css/post.scss

---
---
/*!
  Individual styles for Post
  v2.0
  https://github.com/cotes2020/jekyll-theme-chirpy
  © 2019 Cotes Chung
  MIT License
*/

.post img {
  margin-top: .5rem;
  margin-bottom: 1.5rem;
  max-width: 100%;
  height: auto;
  // filter: drop-shadow(2px 4px 6px rgba(0,0,0,0.08));
  position: relative;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  transform: translateX(-50%);
}

.post-tail {
  margin-top: 3.5rem;
  border-bottom: 1px double var(--main-border, #e9ecef);
  font-size: 0.85rem;
}

.post-navigation {
  padding: 1rem .2rem;
  margin-bottom: 2rem;
}

.post-navigation .btn,
.post-navigation .btn.disabled {
  width: 50%;
  position: relative;
  color: var(--link-color, #2a408e);
  border-color: var(--main-border, #e9ecef);
}

.post-navigation .btn:hover {
  background: #2a408e;
  color: #fff;
  border-color: #2a408e;
}

.post-navigation a.btn.disabled {
  pointer-events: auto;
  cursor: not-allowed;
  background: none;
  color: gray;
  border-color: var(--main-border, #e9ecef);
}

.post-navigation a.btn.btn-outline-primary.disabled:focus {
  box-shadow: none;
}

.post-navigation a > p {
  font-size: 1.1rem;
  line-height: 1.5rem;
  margin-top: .3rem;
  white-space: normal;
}

.post-navigation a:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  left: .5px;
}

.post-navigation a:last-child {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  right: .5px;
}

.post-navigation a::before {
  color: var(--text-muted-color, gray);
  font-size: .65rem;
  text-transform: uppercase;
}

.post-navigation a:first-child::before {
  content: "Older";
}

.post-navigation a:last-child::before {
  content: "Newer";
}

@keyframes fade-up {
  from {
    opacity: 0;
    position: relative;
    top: 2rem;
  }
  to {
    opacity: 1;
    position: relative;
    top: 0;
  }
}

#toc-wrapper {
  border-left: 1px solid rgba(158, 158, 158, 0.17);
  position: -webkit-sticky;
  position: sticky;
  top: 2rem;
  transition: top 0.2s ease-in-out;
  animation: fade-up .8s;
}

#toc-wrapper.topbar-down {
  top: 6rem;
}

#toc-wrapper>h3 {
  font-size: 1rem;
  font-family: 'Oswald', sans-serif;
  color: gray;
}

#toc li>a {
  line-height: 1rem;
  padding-top: .5rem;
  padding-bottom: .5rem;
}


/*--- Related Posts ---*/

#related-posts > h3 {
  color: gray;
  font-size: 1.1rem;
  font-family: 'Oswald', sans-serif;
}

#related-posts .card {
  border: 1px solid var(--main-wrapper-bg, #f1f1f1);
  background-color: var(--card-bg);
  box-shadow: 0 0 5px 0 var(--main-wrapper-bg, rgba(234, 234, 234, 0.7686274509803922));
  -webkit-transition: all .3s ease-in-out;;
  -moz-transition: all .3s ease-in-out;;
  transition: all .3s ease-in-out;
}

#related-posts .card:hover {
  -webkit-transform: translate3d(0, -3px, 0);
  transform: translate3d(0, -3px, 0);
  filter: drop-shadow(2px 4px 6px rgba(0,0,0,0.08));
}

#related-posts .card h3 {
  color: var(--relate-post-title, #353a3d);
}

#related-posts .timeago {
  color: var(--text-muted-color, rgba(30,55,70,.4));
}

#related-posts p {
  font-size: .9rem;
  margin-bottom: .5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

#related-posts a:hover {
  text-decoration: none;
}

#related-posts ul {
  list-style-type: none;
  padding-inline-start: 1.5rem;
}

#related-posts ul > li::before {
  background: #c2c9d4;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  display: block;
  content: "";
  position: relative;
  top: 1rem;
  right: 1rem;
}

#post-extend-wrapper {
  min-height: 2rem;
}

@media all and (max-width: 768px) {
  .post img {
    max-width: calc(100% + 1rem);
  }
}

@media all and (min-width: 768px) {
  .post .post-meta > div:not(:first-child)::before {
    content: "\2022";
    color: rgba(158, 158, 158, 0.8);
    font-weight: bold;
    padding-left: .5rem;
    padding-right: .3rem;
  }

  .post .post-meta.flex-column {
    -webkit-box-orient: horizontal!important;
    -webkit-box-direction: normal!important;
    -ms-flex-direction: row!important;
    flex-direction: row!important;
  }
}

@media all and (min-width: 768px) and (max-width: 830px) {
  .post img {
    max-width: calc(100% + 2rem);
  }
}

/* Hide SideBar and TOC */
@media all and (max-width: 830px) {
  .post img {
    position: relative;
    left: 50%;
    -webkit-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
  }

  .post-navigation {
    padding-left: 0;
    padding-right: 0;
    margin-left: -.5rem;
    margin-right: -.5rem;
  }
}

/*
  The following resposive design aim to make #post-extend-wrapper margin-right same as pannel's width
*/
@media all and (min-width: 1200px) {
  #post-extend-wrapper {
    margin-right: 25%;
  }
}

@media all and (min-width: 1460px) {
  #post-extend-wrapper {
    margin-right: 300px;
  }
}

@media all and (min-width: 1650px) {
  #post-extend-wrapper {
    margin-right: calc((100% - 1150px) / 10 + 300px);
  }
}

@media all and (min-width: 1700px) {
  #post-extend-wrapper {
    margin-right: calc((100% - 1150px) / 8 + 300px);
  }
}

@media (prefers-color-scheme: dark) {
  nav[data-toggle=toc] .nav-link.active,
  nav[data-toggle=toc] .nav-link.active:focus,
  nav[data-toggle=toc] .nav-link.active:hover,
  nav[data-toggle=toc] .nav>li>a:focus,
  nav[data-toggle=toc] .nav>li>a:hover {
    /* Override BS */
    color: var(--toc-highlight)!important;
    border-left-color: var(--toc-highlight)!important;
  }
}