web/assets/css/_src/main.scss

/*!
* The main styles.
* © 2018-2019 Cotes Chung
* MIT Licensed
*/

html, body {
  height: 100%;
  font-size: 16px;
}

/* Solved jumping scrollbar */
html {
  overflow-y: scroll;
}

body {
  line-height: 1.75rem;
  background: #fafafa;
  color: #212529;
  -webkit-font-smoothing: antialiased;
  font-family: 'Source Sans Pro', 'Microsoft Yahei', sans-serif;
}

/*--- sidebar layout ---*/

#sidebar {
  padding-left: 0;
  padding-right: 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  overflow-y: auto;
  width: 260px;
  background: rgb(35, 37, 46);
  z-index: 99;
  transition: transform 0.4s ease;
  -webkit-transition: transform 0.4s ease;
  background: rgb(42, 30, 107);
  background: radial-gradient(circle, rgba(42, 30, 107, 1) 0%, rgba(35, 37, 46, 1) 100%);
}

#sidebar a {
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.35s ease-in-out;
}

#sidebar .nav-item {
  height: 20%;
}

#sidebar .nav-link {
  border-radius: 0;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: 1px;
}

#sidebar .nav-item:hover .nav-link {
  color: #f8f9facf;
}

#sidebar .nav-item.active .nav-link {
  color: #fcfcfc;
}

#sidebar ul {
  height: 16.5rem;
  display: -webkit-box;
  display: -ms-flexbox;
}

#sidebar ul > li.active:nth-child(1) ~ li:last-child::after,
#sidebar ul > li.nav-item:nth-child(1):hover ~ li:last-child::after {
  // top: calc(-400% + (26px / 2));
  top: -195px;
  visibility: visible;
}

#sidebar ul > li.active:nth-child(2) ~ li:last-child::after,
#sidebar ul > li.nav-item:nth-child(2):hover ~ li:last-child::after {
  // top: calc(-300% + (26px / 2));
  top: -143px;
  visibility: visible;
}

#sidebar ul > li.active:nth-child(3) ~ li:last-child::after,
#sidebar ul > li.nav-item:nth-child(3):hover ~ li:last-child::after {
  // top: calc(-200% + (26px / 2));
  top:  -91px;
  visibility: visible;
}

#sidebar ul > li.active:nth-child(4) ~ li:last-child::after,
#sidebar ul > li.nav-item:nth-child(4):hover ~ li:last-child::after {
  // top: calc(-100% + (26px / 2));
  top: -39px;
  visibility: visible;
}

#sidebar ul > li.active:nth-child(5):last-child::after,
#sidebar ul > li.nav-item:nth-child(5):last-child:hover::after {
  // top: calc(26px / 2);
  top: 13px;
  visibility: visible;
}

#sidebar ul > li:last-child > a {
  margin-right: -3px;
  max-width: calc(100% - 3px);
}

#sidebar ul > li:last-child::after {
  visibility: hidden;
  content: "";
  position: relative;
  width: 3px;
  height: 26px;
  background: #fcfcfc;;
  pointer-events: none;
}

@media (hover: hover) {
  #sidebar ul>li:last-child::after {
    -webkit-transition: top .5s ease;
    -moz-transition: top .5s ease;
    -o-transition: top .5s ease;
    transition: top .5s ease;
  }
}

#nav-wrap {
  width: 100%;
  flex-grow: 1;
}

#profile-wrap {
  margin-top: 2rem;
}

#avatar>a {
  display: block;
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  border: 2px solid #b6b6b6;
  overflow: hidden;
  transform: translateZ(0); /* fixed the zoom in Safari */
  -webkit-transition: border-color 0.35s ease-in-out;
  -moz-transition: border-color 0.35s ease-in-out;
  transition: border-color 0.35s ease-in-out;
}

#avatar:hover>a {
  border-color: #fff;
}

#avatar img {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-repeat: no-repeat;
  -webkit-transition: all .5s !important;
  -moz-transition: all .5s !important;
  transition: all .5s !important;
}

#avatar img:hover {
  -ms-transform: scale(1.2);
  -moz-transform: scale(1.2);
  -webkit-transform: scale(1.2);
  transform: scale(1.2);
}

#site-title {
  text-align: center;
}

#site-title a {
  color: #b6b6b6;
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: .5px;
}

#site-title a:hover {
  color: #fff;
  text-decoration: none;
}

#site-subtitle {
  font-size: 95%;
  text-align: center;
  color: #828282;
  line-height: 1.2rem;
  word-spacing: 1px;
  margin: .5rem 1.5rem 2rem 1.5rem;
}

.sidebar-expand {
  box-shadow: 4px 0 8px 0 rgba(0, 0, 0, 0.2), 6px 0 20px 0 rgba(0, 0, 0, 0.19) !important;
}

#search-result-wrap {
  display: none;
  position: fixed;
  top: 3rem;
  height: 100%;
  width: calc(100% - 260px);
  overflow: auto;
}

#search-result-wrap>div.row>div {
  min-height: calc(100vh - 3rem - 2rem);
}

#search-result-wrap .post-content {
  margin-top: 2rem;
}

.contact {
  font-size: 1.2rem;
  margin: 2rem 2.5rem;
  flex-shrink: 0;
  -webkit-flex-shrink: 0;
  -ms-flex-shrink: 0;
  /*box-shadow: inset 0 0 0.25em 0 rgba(0, 0, 0, 0.22);*/
}

#sidebar .contact a:hover {
  color: #fff;
}

/*--- top-bar ---*/

#topbar {
  height: 3rem;
  position: fixed;
  top: 0;
  left: 260px; /* same as sidebar width */
  right: 0;
  transition: top 0.2s ease-in-out;
  z-index: 50;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
  box-shadow: 0 3px 5px 0 rgba(0, 0, 0, 0.05);
}

#topbar i.fas { // icons
  color: #999;
}

#breadcrumb {
  font-size: 1rem;
  color: gray;
  padding-left: 1rem;
}

#breadcrumb span:not(:last-child)::after {
  content: "›";
  padding: 0 .3rem;
}

#sidebar-trigger,
#search-trigger {
  margin: 0 1rem;
  display: none;
}

#search-wrap i {
  position: relative;
  top: 1rem;
  left: .5rem;
  z-index: 2;
  font-size: .9rem;
  color: #c2c6cc!important;
}

#search-input {
  position: relative;
  top: -.86rem;
  background: #f5f5f5;
  border-color: #e9ecef;
  border-radius: 0.9rem;
  padding: .18rem .75rem .18rem 2rem;
  color: #797878;
}

#search-input:focus {
  box-shadow: none;
  background: center;
}

#topbar-title {
  display: none;
  font-size: 1.1rem;
  font-weight: 600;
  font-family: sans-serif;
  color: rgb(78, 78, 78);
  text-align: center;
  width: 70%;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: keep-all;
  white-space: nowrap;
}

#search-wrap+a {
  color: #2a408e;
  display: none;
}

#mask {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: #c1c3c5;
  opacity: 0.5;
  z-index: 1;
}

.sidebar-expand~#mask {
  display: block!important;
}

/*--- main wrap ---*/

#main-wrap {
  position: relative;
  min-height: 100%;
  padding-bottom: 6rem; /* equals to or greatter than footer's height */
  padding-left: 0;
  padding-right: 0;
  margin-left: 260px;
  transition: transform 0.4s ease;
  -webkit-transition: transform 0.4s ease;
}

#main>div.row>div {
  margin-top: 3rem; /* same as the height of topbar */
}

#main>div.row>div:first-child {
  min-height: calc(100vh - 3rem - 6rem); /* 3rem for topbar, 6rem for footer */
}

#topbar.row,
#main>.row,
#search-result-wrap>.row {
  margin-left: 0;
  margin-right: 0;
}

footer {
  position: absolute;
  bottom: 0;
  height: 6rem; /* see the height of #main-wrap */
  padding: 1rem;
  font-size: 0.8rem;
  color: #7a7b7d;
  background: #f3f3f3;
}

footer>div.d-flex {
  line-height: 1.2rem;
  width: 90%;
}

footer a:link,
footer a:hover {
  text-decoration: none;
}

footer>.d-flex>div {
  width: 350px;
}

footer .copyright a,
footer .license a {
  font-weight: 600;
  color: inherit;
}


/*--- Panels ---*/
.access {
  top: 2rem;
  transition: top 0.2s ease-in-out;
  margin-right: 1.5rem;
  margin-top: 3rem;
  margin-bottom: 6rem;
  color: #6c757d;
}

.access:only-child {
  position: -webkit-sticky; /* Safari */
  position: sticky;
}

.access.topbar-down {
  top: 6rem;
}

.access>div {
  padding-left: 1rem;
  border-left: 1px solid rgba(158, 158, 158, 0.17);
}

.access>div:not(:first-child) {
  margin-top: 4rem;
}

.access h3 {
  padding-top: .5rem;
  padding-bottom: .5rem;
  margin-top: 0;
  margin-bottom: 0;
  letter-spacing: -0.02em;
  font-size: 1rem;
  font-family: 'Oswald', sans-serif;
}

.access .post-content {
  font-size: .9rem;
}

#access-tags>div.post-content>div {
  max-width: 80%;
}

#access-tags .post-tag {
  display: inline-block;
  line-height: 1rem;
  font-size: 0.85rem;
  background: none;
  border: 1px solid #e9ecef;
  border-radius: .8rem;
  padding: .3rem .5rem;
  margin: 0 .35rem .5rem 0;
}

#access-tags .post-tag:hover {
  background-color: #2a408e;
  border-color: #2a408e;
  color: #fff;
  transition: none;
}

#access-lastmod ul>li {
  height: 1.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  list-style: none;
}

#access-lastmod ul a {
  color: #6c757d;
}

/*--- button back-to-top ---*/

#back-to-top {
  display: none;
  z-index: 1;
  cursor: pointer;
  position: fixed;
  background: #fff;
  color: #686868;
  height: 2.6em;
  width: 2.7em;
  border-radius: 50%;
  border: 1px solid #f1f1f1;
  transition: 0.2s ease-out;
  -webkit-transition: 0.2s ease-out;
}

#back-to-top:hover {
  transform: translate3d(0, -5px, 0);
  -webkit-transform: translate3d(0, -5px, 0);
}

/*--- Typography ---*/

h1 {
  font-size: 1.8rem;
  font-weight: 400;
}

h2 {
  font-size: 1.35rem;
  font-weight: 400;
}

h3 {
  font-size: 1.25rem;
}

h4 {
  font-size: 1.15rem;
}

h5 {
  font-size: 1.1rem;
}

h2, h3, h4 {
  line-height: 1.2;
  margin-bottom: 1rem;
}

blockquote {
  border-left: 5px solid #eee;
  padding-left: 1rem;
  color: #9a9a9a;
}

.post-content blockquote a {
  color: #2a408e;
}

kbd {
  margin: 0 .3rem;
}

h2, h3, h4, sup {
  padding-top: 4rem;
  margin-top: -2.5rem;
}

div.footnotes>ol {
  padding-inline-start: 2rem;
  margin-top: .5rem;
}

div.footnotes>ol>li>p {
  padding-left: .2em;
}

div.footnotes>ol>li:not(:last-child) {
  margin-bottom: -.8rem;
}

div.footnotes>ol>li:target>p {
  background-color: lightcyan;
  width: fit-content;
  -webkit-transition: background-color 1.5s ease-in-out; /* Safari prior 6.1 */
  transition: background-color 1.5s ease-in-out;
}

a.footnote {
  margin: 0 .2em;
  -webkit-transition: background-color 1.5s ease-in-out; /* Safari prior 6.1 */
  transition: background-color 1.5s ease-in-out;
}

sup:target>a.footnote {
  background-color: lightcyan;
  padding: 0 2px;
  outline: thin dotted;
}

a.reversefootnote {
  font-size: .6rem;
  position: absolute;
  line-height: 1;
  padding-top: .5em;
  margin-left: .5em;
  border-bottom-style: none !important;
}

.post-content a {
  color: #2a408e;
  border-bottom: 1px dotted #c2c6cc;
}

#search-results a {
  font-size: 1.1rem;
  line-height: 2.5rem;
}

p>a, span>a,
.post-preview a,
.categories a,
#tags a,
#page-category a,
#page-tag a,
#archives a,
#search-results a {
  color: #2a408e;
}

.categories a,
.access a,
#archives a,
#page-tag a,
#page-category a,
#search-results a {
  border-bottom: none;
}

.post h1 {
  margin-top: 3rem;
}

#breadcrumb a:hover,
#search-results a:hover,
.post-preview a:hover,
.post-meta a:hover,
.post-content a:hover,
.post a:hover code,
footer a:hover,
#post-wrap .post-content a:hover,
#page .post-content a:hover,
#access-lastmod a:hover {
  color: #d2603a;
  border-bottom: 1px solid #d2603a;
  text-decoration: none;
}

.post em { /* MarkDown italic */
  padding-right: .2rem;
}

/*--- Begin of Markdown table style ---*/

div.post-content>table,
div.post-content li>table {
  min-width: 40%;
  border-collapse: collapse;
  border-spacing: 0;
  margin-bottom: 1.5rem;
}

table thead {
  border-bottom: solid 2px rgba(210, 215, 217, 0.75);
}

table thead+tbody tr {
  border-bottom: solid 1px rgba(210, 215, 217, 0.75);
}

table thead+tbody tr:nth-child(2n + 1) {
  background-color: #f8f9fa;
}

table thead th,
table tbody td {
  padding: .35rem .8rem;
  font-size: 95%;
}


/*--- Home page ---*/

#post-list {
  margin-top: 1rem;
  padding-right: .5rem;
}

.pagination {
  font-size: 1rem;
}

.pagination a:hover {
  text-decoration: none;
}

.post-preview {
  padding-top: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(158, 158, 158, 0.17);
}

.post-preview>h1 {
  font-size: 1.4rem;
  margin: 0;
}

.post-preview i.far {
  /* fontawesome icons */
  font-size: 86%;
}

.post-preview .post-content {
  margin-top: .6rem;
  margin-bottom: .6rem;
  color: dimgray;
}

/* Make preview shorter in Home page*/
.post-preview .post-content>p {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.page-item .page-link {
  color: #555555;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  text-align: center;
  display: -webkit-box;
  display: flex;
  -webkit-box-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  align-items: center;
  border-radius: 50%;
  border: 1px solid #f1f1f1;
  font-family: 'Lato', sans-serif;
}

.page-item.active .page-link {
  background-color: #2a408e;
  box-shadow: 0 0 8px 0 #4b92d2 !important;
  color: #f8f8f8;
}

.page-item.disabled .page-link {
  color: rgba(108, 117, 125, 0.57);
  border-color: #f1f1f1;
}

.page-item.disabled {
  cursor: not-allowed;
}

.page-item:first-child .page-link,
.page-item:last-child .page-link {
  border-radius: 50%;
}

.page-item:not(:last-child) {
  margin-right: 0.6rem;
}

/*--- post ---*/

.post-meta {
  font-size: 0.85rem;
  word-spacing: 1px;
}

.post-meta a {
  color: #2a408e;
  border-bottom: 1px dotted #c2c6cc;
}

.post-meta a:not(:last-child) {
  margin-right: 2px;
}

.post-content {
  line-height: 1.8;
  font-size: 1rem;
  margin-top: 2rem;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

#post-list .post-meta i:not(:first-child) { // post-meta icons on HOME
  margin-left: 1.5rem;
}

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

.post-tag {
  background: rgba(0, 0, 0, 0.075);
  border-radius: .34rem;
  padding: .25rem .4rem;
  margin: 0 .1rem;
  color: #818182;
  line-height: 1.6rem;
}

.tag:hover,
.post-tag:hover {
  background: rgb(222, 226, 230);
  transition: background 0.35s ease-in-out;
}

.post-tag:hover {
  border-bottom: none;
  text-decoration: none;
  color: #d2603a;
}

.post-pager {
  margin: 1rem 0 2rem;
}

.post-pager .btn,
.post-pager .btn.disabled {
  color: #2a408e;
  border-color: #2a408e;
}

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

.post-pager a.btn.disabled {
  pointer-events: auto;
  cursor: not-allowed;
  background: none;
  color: gray;
  border-color: gray;
}

.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));
}

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

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

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

#toc li>a {
  padding-top: 0;
}


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

#related-posts {
  border-bottom: 1px double #e9ecef;
}

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

#related-posts .card {
  border: 1px solid #f1f1f1;
  box-shadow: 0 0 5px 0 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, -8px, 0);
  transform: translate3d(0, -8px, 0);
}

#related-posts .card h3 {
  color: #353a3d;
}

#related-posts .timeago {
  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;
}


/*--- Tab Categories ---*/

.categories {
  margin-bottom: 2rem;
}

.categories .card-header {
  padding-right: 12px;
}

.categories .card-header>span>i:first-child,
.categories .list-group-item>i {
  color: gray;
}

.categories .list-group-item {
  border-left: none;
  border-right: none;
  padding-left: 2rem;
}

.categories .collapsing .list-group-item:first-child,
.categories .collapse .list-group-item:first-child {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.categories i.far,
.categories i.fas { // fontawesome icons
  font-size: 86%;
}

.category-trigger {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  text-align: center;
  color: #6c757d!important;
}

@media (hover: hover) { // only works on desktop
  .category-trigger:hover {
    background-color: #e9ecef;
  }
}

.category-trigger>i.fas.fa-angle-up {
  position: relative;
  bottom: 8%;
  transition: 300ms ease all;
}

.disabled {
  color: rgb(206, 196, 196);
  pointer-events: auto;
  cursor: not-allowed;
}

.hide-border-bottom {
  border-bottom: none!important;
}


/*--- Tab Tags and Tag-Page ---*/

.tag {
  border-radius: 0.7em;
  padding: 6px 8px 7px;
  margin-right: .8rem;
  line-height: 3rem;
  letter-spacing: 0;
  border: 1px solid #dee2e6 !important;
  box-shadow: 0 0 3px 0 #e9ecef;
}

.tag span {
  margin-left: 0.6em;
  font-size: 0.7em;
  font-family: 'Oswald', sans-serif;
}

a.tag:hover {
  text-decoration: none;
}

/*--- Tab Archives --*/

#archives {
  letter-spacing: 0.03rem;
}

#archives li {
  font-size: 1.1rem;
  line-height: 3rem;
}

#archives li:nth-child(odd) {
  background-color: #fff;
  background-image: linear-gradient(to left, #fff, #fbfbfb, #fbfbfb, #fbfbfb, #fff);
}

#archives li>div {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#archives span.lead {
  font-size: 1.5rem;
  font-family: 'Oswald', sans-serif;
  position: relative;
  left: 8px;
}

#archives span.lead:not(:first-child) {
  position: relative;
  left: 4px;
}

#archives span.lead:not(:first-child)::after {
  left: 67px;
}

#archives span.lead::after { /* Year dot */
  content: "";
  display: block;
  position: relative;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  width: 12px;
  height: 12px;
  top: -26px;
  left: 63px;
  border: 3px solid;
  background-color: #ffffff;
  border-color: #c2c6cc;
  box-shadow: 0 0 2px 0 #c2c6cc;
  z-index: 1;
}

#archives .date {
  white-space: nowrap;
  display: inline-block;
}

#archives .date.month {
  width: 1.4rem;
  text-align: center;
  font-family: 'Oswald', sans-serif;
}

#archives .date.day {
  font-size: 85%;
  font-family: sans-serif;
  text-align: center;
  margin-right: -2px;
  width: 1.2rem;
  position: relative;
  left: -.15rem;
}

#archives ul>li>div>a {
/* post title in Archvies */
  margin-left: 2.5rem;
  position: relative;
  top: .1rem;
}

#archives .date.month ~ a::before {
  /* A dot for Month and Day */
  content: "";
  display: inline-block;
  position: relative;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  width: 8px;
  height: 8px;
  float: left;
  top: 1.35rem;
  left: 69px;
  background-color: #c2c6cc;
  box-shadow: 0 0 3px 0 #c2c6cc;
  z-index: 1;
}

/* timeline for date */
#archives ul>li::after,
#archives ul>li:first-child::before {
  content: "";
  width: 4px;
  left: 75px;
  display: inline-block;
  float: left;
  position: relative;
  background-color: rgba(0, 0, 0, 0.075);
}

#archives ul>li::after {
  height: 2.8rem;
  top: -1.3rem;
}

#archives ul>li:first-child::before {
  height: 3.06rem;
  top: -1.61rem;
}

#archives ul:not(:last-child)>li:last-child::after {
  height: 3.4rem;
}

#archives ul:last-child>li:last-child::after {
  display: none;
}


/*--- Page Category and Tag ---*/

#page-category ul>li,
#page-tag ul>li {
  line-height: 1.5rem;
  padding: .6rem 0;
}

#page-category ul>li::before,
#page-tag ul>li::before {
  background: #999;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  display: block;
  content: "";
  position: relative;
  top: .6rem;
  margin-right: .5rem;
}

#page-tag ul>li>a,
#page-category ul>li>a, { /* post's title */
  font-size: 1.1rem;
}

#page-category ul>li>span:last-child,
#page-tag ul>li>span:last-child { /* post's date */
  white-space: nowrap;
}

#page-tag h1>i { // tag icon
  font-size: 1.2rem;
}

#page-category h1>i {
  font-size: 1.25rem;
}

#page-category a:hover,
#page-tag a:hover,
#access-lastmod a:hover {
  margin-bottom: -1px;  // Avoid jumping
}

.dash {
  margin: 0 .5rem .6rem .5rem;
  border-bottom: 2px dotted silver;
}


/* --- Effects classes --- */

.hidden {
  display: none!important;
}

.shown {
  display: block!important;
}

.no-scroll {
  position: fixed;
  width: 100%;
}

.flex-grow-1 {
  -ms-flex-positive: 1!important;
  flex-grow: 1!important;
}

.btn-box-shadow {
  box-shadow: 0 0 8px 0 #eaeaea!important;
}

.topbar-up {
  top: -3rem !important; /* same as topbar height. */
}

.flip {
  -ms-transform: rotate(180deg); /* IE 9 */
  -webkit-transform: rotate(180deg); /* Safari 3-8 */
  transform: rotate(180deg);
}

.no-text-decoration {
  text-decoration: none;
}

div.tooltip-inner { /* Overrided BS4 Tooltip */
  font-size: .7rem;
  max-width: 220px;
}


/*--- Responsive Design ---*/

@media all and (max-width: 576px) {

  #main>div.row>div:first-child {
    min-height: calc(100vh - 3rem - 10rem); /* topbar is 3rem and footer is 10rem */
  }

  #main-wrap {
    padding-bottom: 10rem; /* footer height */
  }

  #avatar>a {
    width: 5rem;
    height: 5rem;
  }

  #site-subtitle {
    margin-left: 1.8rem;
    margin-right: 1.8rem;
  }

  #post-wrap h1 {
    margin-top: 2.2rem;
    font-size: 1.55rem;
  }

  #post-list .post-meta>span i:not(:first-child) {
    margin-left: 1rem;
  }

  .post-content {
    font-size: 1.08rem;
  }

  /* table text in small screens */
  div>table, p~table {
    width: 100%;
    table-layout: fixed;
    word-wrap: break-word;
  }

  #archives {
    margin-top: -1rem;
  }

  #archives ul {
    letter-spacing: 0;
  }

  #page-tag ul>li>a,
  #page-category ul>li>a {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* footer and #main-wrap expand vertical */
  footer {
    height: 10rem;
  }

  footer>div.d-flex {
    flex-wrap: wrap;
    justify-content: left!important;
    -ms-flex-pack: distribute!important;
    justify-content: space-around!important;
  }

}

@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: 831px) {
  /* button 'back-to-Top' position */
  #back-to-top {
    bottom: 9.2rem;
    right: 1.2rem;
  }

  .topbar-up {
    box-shadow: none !important;
  }

  #topbar-title {
    text-align: left;
  }

}

/* iPad 9.7" horizontal */
@media all and (min-width: 992px) and (max-width: 1024px) {
  #main-wrap .col-lg-11 {
    -webkit-box-flex: 0;
    -ms-flex: 0 0 96%;
    flex: 0 0 96%;
    max-width: 96%;
  }
}


@media all and (min-width: 768px) and (max-width: 831px) {
  .post img {
    max-width: calc(100% + 2rem);
  }
}


/* Hide SideBar and TOC */
@media all and (max-width: 831px) {

  .sidebar-expand {
    transform: translateX(0) !important;
  }

  .sidebar-expand~#main-wrap {
    transform: translateX(260px) !important;
  }

  #sidebar {
    transform: translateX(-260px); /* hide */
    -webkit-transform: translateX(-260px);
  }

  #sidebar .cursor {
    -webkit-transition: none;
    -moz-transition: none;
    transition: none;
  }

  #main-wrap {
    margin-left: 0;
  }

  #search-result-wrap {
    width: 100%
  }

  #page h1.dynamic-title {
    display: none;
  }

  #page h1.dynamic-title ~ .post-content {
    margin-top: 3rem;
  }

  #breadcrumb,
  #search-wrap {
    display: none;
  }

  #topbar {
    position: -webkit-sticky;
    position: sticky;
    left: 0;
  }

  .topbar-up {
    top: 0 !important;
  }

  #main>div.row>div {
    margin-top: 0;
  }

  .post img {
    position: relative;
    left: 50%;
    -webkit-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    transform: translateX(-50%);
  }

  #topbar-title,
  #sidebar-trigger,
  #search-trigger {
    display: block;
  }

  #search-wrap.shown {
    padding-left: 1rem;
  }

  #search-wrap.shown~a {
    padding-right: 1rem;
  }

  #search-input {
    margin-left: 0;
    width: 95%;
  }

  #search-result-wrap .post-content {
    letter-spacing: 0;
  }

  #tags {
    -webkit-box-pack: center!important;
    -ms-flex-pack: center!important;
    justify-content: center!important;
  }

  sup {
    padding-top: 3.4rem;
  }

  div.footnotes>ol>li {
    padding-top: 3.5rem;
    margin-top: -4.3rem;
  }

  div.footnotes>ol>li:first-child {
    margin-top: -3.5rem;
  }
}

/* Compact icons in sidebar & TOC hidden */
@media all and (min-width: 832px) and (max-width: 1200px) {

  #sidebar {
    width: 210px;
  }

  #topbar {
    left: 210px;
  }

  #search-result-wrap {
    width: calc(100% - 210px);
  }

  #site-title {
    font-size: 1.3rem;
    margin-left: 0!important;
  }

  #site-subtitle {
    font-size: 90%;
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .contact a {
    padding: 0 0.6rem;
  }

  #main-wrap {
    margin-left: 210px;
  }

  #breadcrumb {
    width: 65%;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: keep-all;
    white-space: nowrap;
  }

}

/* Pannel hidden */
@media all and (max-width: 1200px) {
  #panel-wrap {
    display: none;
  }

  #post-list {
    padding-right: 0;
  }

  .pagination {
    justify-content: center;
  }

  #topbar-main {
    padding: 0;
  }

  footer>div.d-flex {
    width: 95%;
  }

}


/*--- Large screens ---*/

@media all and (min-width: 1200px) {

  #main>div.row .col-xl-8 {
    -webkit-box-flex: 0;
    -ms-flex: 0 0 75%;
    flex: 0 0 75%;
    max-width: 75%;
    padding-left: 3.5rem;
  }

  #back-to-top {
    bottom: 9rem;
    right: 4.3rem;
  }

  #search-wrap {
    width: 22%;
  }

  #search-input {
    width: 100%;
    -webkit-transition: all .3s ease-in-out;
    transition: all .3s ease-in-out;
  }

}

@media all and (min-width: 1650px) {

  #main-wrap {
    margin-left: 350px;
  }

  #main>div.row .col-xl-8 {
    padding-left: 0px;
    padding-right: 1.5rem;
    margin-left: -4rem;
    max-width: 65%;
  }

  #main-wrap .col-xl-3 {
    max-width: 20%;
  }

  #topbar {
    left: 350px;
  }

  #topbar-main {
    max-width: 90%;
  }

  #search-wrap {
    margin-right: 5%;
  }

  #sidebar {
    width: 350px;
  }

  #profile-wrap {
    margin-top: 4rem;
    margin-bottom: 6rem;
    -ms-flex-direction: column!important;
    flex-direction: row!important;
  }

  #avatar {
    margin-left: 2.5rem;
  }

  #avatar>a {
    width: 5rem;
    height: 5rem;
  }

  .profile-text {
    margin-top: 0!important;
    /* .d-flex */
    display: -webkit-box!important;
    display: -ms-flexbox!important;
    display: flex!important;
    /* .flex-wrap */
    -ms-flex-wrap: wrap!important;
    flex-wrap: wrap!important;
    /* .align-content-center */
    -ms-flex-line-pack: center!important;
    align-content: center!important;
  }

  #site-title a {
    letter-spacing: 1px;
  }

  #site-title, #site-subtitle {
    text-align: left;
    margin-left: 1.1rem;
  }

  #site-subtitle {
    word-spacing: 0;
    margin-top: .3rem;
    margin-bottom: 0;
  }

  #sidebar ul>li>a {
    padding-left: 2.5rem;
    -webkit-box-pack: start!important;
    -ms-flex-pack: start!important;
    justify-content: flex-start!important;
  }

  #sidebar .nav-link>span {
    letter-spacing: 3px;
  }

  #sidebar .nav-link>i {
    border: 1px solid;
    border-radius: 50%;
    width: 1.65rem;
    height: 1.65rem;
    line-height: 1rem;
    font-size: .6rem;
    padding: .5em 0 0 .1em;
    display: inline-block!important;
  }

  .contact {
    margin-left: 2.5rem;
    margin-right: 4.5rem;
    font-size: 1.3rem;
    padding-bottom: 1rem;
  }

  .contact a {
    border: 1px solid;
    border-radius: 50%;
    font-size: 1rem;
    width: 2rem;
    height: 2rem;
    text-align: center;
  }

  .contact a>i {
    text-align: center;
    width: 1.25em;
    padding-top: .45rem;
  }

  footer>div.d-flex {
    width: 88%;
  }

}