diff --git a/assets/css/_addon/main.scss b/assets/css/_addon/main.scss
index 91b97ac..1dc79ea 100644
--- a/assets/css/_addon/main.scss
+++ b/assets/css/_addon/main.scss
@@ -87,7 +87,7 @@ $sidebar-display: "sidebar-display";
     a {
       font-weight: 900;
       font-size: 1.5rem;
-      letter-spacing: .5px;
+      letter-spacing: 0.5px;
       &:hover {
         color: #fff;
         text-decoration: none;
@@ -101,17 +101,17 @@ $sidebar-display: "sidebar-display";
     color: #828282;
     line-height: 1.2rem;
     word-spacing: 1px;
-    margin: .5rem 1.5rem 2rem 1.5rem;
+    margin: 0.5rem 1.5rem 2rem 1.5rem;
   }
 
   .sidebar-bottom {
     .icon-border + a { // the icon behide mode-toggle
-      margin-left: .1rem;
+      margin-left: 0.1rem;
     }
   }
   .nav-link {
     border-radius: 0;
-    font-size: .95rem;
+    font-size: 0.95rem;
     font-weight: 600;
     letter-spacing: 1px;
   }
@@ -133,8 +133,8 @@ $sidebar-display: "sidebar-display";
     display: -webkit-box;
     display: -ms-flexbox;
 
-    >li:last-child {
-      >a {
+    > li:last-child {
+      > a {
         margin-right: -3px;
         max-width: calc(100% - 3px);
       }
@@ -160,15 +160,15 @@ $sidebar-display: "sidebar-display";
       $top: -$offset * $tab-height + $tab-cursor-height / 2;
 
       @if $i < $tab-count {
-        >li.active:nth-child(#{$i}),
-        >li.nav-item:nth-child(#{$i}):hover {
+        > li.active:nth-child(#{$i}),
+        > li.nav-item:nth-child(#{$i}):hover {
           ~li:last-child::after {
             @include fix-cursor($top);
           }
         }
       } @else {
-        >li.active:nth-child(#{$i}):last-child::after,
-        >li.nav-item:nth-child(#{$i}):last-child:hover::after {
+        > li.active:nth-child(#{$i}):last-child::after,
+        > li.nav-item:nth-child(#{$i}):last-child:hover::after {
           @include fix-cursor($top);
         }
       }
@@ -181,7 +181,7 @@ $sidebar-display: "sidebar-display";
     font-size: 1.2rem;
     margin: 2rem 2.5rem 1.6rem;
     a {
-      margin-bottom: .5rem; // icons may have multi lines
+      margin-bottom: 0.5rem; // icons may have multi lines
     }
 
     a:hover, #mode-toggle-wrapper > i:hover {
@@ -204,7 +204,7 @@ $sidebar-display: "sidebar-display";
       width: 3px;
       height: 3px;
       border-radius: 50%;
-      margin-top: .75rem;
+      margin-top: 0.75rem;
     }
   }
 } // #sidebar
@@ -228,7 +228,7 @@ $sidebar-display: "sidebar-display";
 }
 
 #avatar {
-  >a {
+  > a {
     display: block;
     width: 6rem;
     height: 6rem;
@@ -295,7 +295,7 @@ $sidebar-display: "sidebar-display";
 #breadcrumb {
   font-size: 1rem;
   color: gray;
-  padding-left: .5rem;
+  padding-left: 0.5rem;
   a:hover {
     @extend %link-hover;
   }
@@ -323,7 +323,7 @@ $sidebar-display: "sidebar-display";
   padding: 0 .5rem;
   i {
     z-index: 2;
-    font-size: .9rem;
+    font-size: 0.9rem;
     color: var(--search-icon-color);
   }
   .fa-times-circle { /* button 'clean up' */
@@ -341,7 +341,7 @@ $sidebar-display: "sidebar-display";
   background: center;
   border: 0;
   border-radius: 0;
-  padding: .18rem .3rem;
+  padding: 0.18rem .3rem;
   color: var(--text-color);
 }
 
@@ -366,12 +366,12 @@ $sidebar-display: "sidebar-display";
     font-size: 1rem;
     background: var(--search-tag-bg);
     border: none;
-    padding: .5rem;
+    padding: 0.5rem;
     margin: 0 1rem 1rem 0;
     &::before {
       content: "#";
       color: var(--text-muted-color);
-      padding-right: .2rem;
+      padding-right: 0.2rem;
     }
   }
 }
@@ -388,17 +388,17 @@ $sidebar-display: "sidebar-display";
       @extend %link-hover;
     }
   }
-  >div {
+  > div {
     max-width: 100%;
     &:not(:last-child) {
       margin-bottom: 1rem;
     }
     i { // icons
       color: #818182;
-      margin-right: .15rem;
+      margin-right: 0.15rem;
       font-size: 80%;
     }
-    >p {
+    > p {
       overflow: hidden;
       text-overflow: ellipsis;
       display: -webkit-box;
@@ -476,13 +476,13 @@ footer {
   font-size: 0.8rem;
   color: #7a7b7d;
   background-color: var(--footer-bg-color);
-  >div.d-flex {
+  > div.d-flex {
     line-height: 1.2rem;
     width: 95%;
     max-width: 1045px;
     border-top: 1px solid var(--main-border-color);
     margin-bottom: 1rem;
-    >div {
+    > div {
       width: 350px;
     }
   }
@@ -527,13 +527,13 @@ footer {
     @include panel-label;
   }
   .post-content {
-    font-size: .9rem;
+    font-size: 0.9rem;
   }
 }
 
 
 #access-tags {
-  >div.post-content > div {
+  > div.post-content > div {
     max-width: 80%;
   }
   .post-tag {
@@ -542,8 +542,8 @@ footer {
     font-size: 0.85rem;
     background: none;
     border: 1px solid var(--btn-border-color);
-    border-radius: .8rem;
-    padding: .3rem .5rem;
+    border-radius: 0.8rem;
+    padding: 0.3rem .5rem;
     margin: 0 .35rem .5rem 0;
     &:hover {
       background-color: #2a408e;
@@ -556,7 +556,7 @@ footer {
 
 #access-lastmod {
   ul {
-    >li {
+    > li {
       height: 1.8rem;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -659,12 +659,12 @@ sup {
 }
 
 .footnotes ol {
-  margin-top: .5rem;
-  >li {
-    padding-top: .2rem;
+  margin-top: 0.5rem;
+  > li {
+    padding-top: 0.2rem;
     margin-top: -0.2rem;
-    >p {
-      padding-left: .2em;
+    > p {
+      padding-left: 0.2em;
     }
     &:not(:last-child) {
       margin-bottom: -.8rem;
@@ -694,11 +694,11 @@ sup {
 
 .reversefootnote {
   @at-root a#{&} {
-    font-size: .6rem;
+    font-size: 0.6rem;
     position: absolute;
     line-height: 1;
-    padding-top: .5em;
-    margin-left: .5em;
+    padding-top: 0.5em;
+    margin-left: 0.5em;
     border-bottom-style: none !important;
   }
 }
@@ -737,7 +737,7 @@ img {
     margin-bottom: 1rem;
   }
   em { /* MarkDown italic */
-    padding-right: .2rem;
+    padding-right: 0.2rem;
   }
   a:hover {
     code {
@@ -751,7 +751,7 @@ img {
 div.post-content .table-wrapper {
   overflow-x: auto;
 
-  >table {
+  > table {
     min-width: 60%;
     overflow-x: auto;
     border-spacing: 0;
@@ -812,8 +812,8 @@ div.post-content .table-wrapper {
   word-wrap: break-word;
 
   @mixin img($caption: false) {
-    >img:not([style]) {
-      margin: .5rem 0;
+    > img:not([style]) {
+      margin: 0.5rem 0;
 
       &:not(.normal):not(.left):not(.right) {
         @include align-center;
@@ -825,12 +825,12 @@ div.post-content .table-wrapper {
 
       &.left {
         float: left;
-        margin: .75rem 1rem 1rem 0;
+        margin: 0.75rem 1rem 1rem 0;
       }
 
       &.right {
         float: right;
-        margin: .75rem 0 1rem 1rem;
+        margin: 0.75rem 0 1rem 1rem;
       }
 
     }
@@ -876,12 +876,12 @@ div.post-content .table-wrapper {
   min-width: 2rem;
   text-align: center;
   background: var(--tag-bg);
-  border-radius: .3rem;
+  border-radius: 0.3rem;
   padding: 0 .4rem;
   color: inherit;
   line-height: 1.3rem;
   &:not(:last-child) {
-    margin-right: .2rem;
+    margin-right: 0.2rem;
   }
 
   &:hover {
@@ -942,7 +942,7 @@ div.post-content .table-wrapper {
 }
 
 .tooltip-inner { /* Overrided BS4 Tooltip */
-  font-size: .7rem;
+  font-size: 0.7rem;
   max-width: 220px;
   text-align: left;
 }
@@ -1005,10 +1005,10 @@ div.post-content .table-wrapper {
 
   footer {
     height: $footer-height;
-    >div.d-flex {
+    > div.d-flex {
       width: 100%;
       padding: 1.5rem 0;
-      margin-bottom: .3rem;
+      margin-bottom: 0.3rem;
       flex-wrap: wrap;
       justify-content: left!important;
       -ms-flex-pack: distribute!important;
@@ -1335,14 +1335,14 @@ div.post-content .table-wrapper {
 
   #main > div.row {
     padding-left: calc((100% - #{$main-content-max-width}) / 2);
-    >div.col-xl-8 {
+    > div.col-xl-8 {
       max-width: 850px;
     }
   }
 
   #search-result-wrapper {
     padding-right: 2rem;
-    >div {
+    > div {
       max-width: 1110px;
     }
   }
@@ -1367,8 +1367,8 @@ div.post-content .table-wrapper {
 
   #main > div.row > div.col-xl-8 {
     padding-left: 0;
-    >div:first-child {
-      padding-left: .55rem !important;
+    > div:first-child {
+      padding-left: 0.55rem !important;
       padding-right: 1.9rem !important;
     }
   }
@@ -1401,14 +1401,14 @@ div.post-content .table-wrapper {
       -webkit-box-pack: normal !important;
       -ms-flex-pack: normal !important;
       justify-content: normal !important;
-      >a {
+      > a {
         width: 6.2rem;
         height: 6.2rem;
       }
     }
 
     .profile-text {
-      margin-left: .5rem;
+      margin-left: 0.5rem;
       /* .d-flex */
       display: -webkit-box!important;
       display: -ms-flexbox!important;
@@ -1419,7 +1419,7 @@ div.post-content .table-wrapper {
       /* .align-content-center */
       -ms-flex-line-pack: center!important;
       align-content: center!important;
-      >div {
+      > div {
         text-align: left !important;
         width: 100%;
       }
@@ -1437,12 +1437,12 @@ div.post-content .table-wrapper {
 
     .site-subtitle {
       word-spacing: 0;
-      margin: .3rem 0 0 0;
+      margin: 0.3rem 0 0 0;
     }
 
     ul {
       margin-left: 3%;
-      >li > a {
+      > li > a {
         padding-left: 2.5rem;
         -webkit-box-pack: start!important;
         -ms-flex-pack: start!important;
@@ -1451,14 +1451,14 @@ div.post-content .table-wrapper {
     }
 
     .nav-link {
-      >span {
+      > span {
         letter-spacing: 3px;
       }
-      >i {
+      > i {
         @include icon-round(1.65rem);
         line-height: 1rem;
-        font-size: .6rem;
-        padding: .5em 0 0 .1em;
+        font-size: 0.6rem;
+        padding: 0.5em 0 0 .1em;
         display: inline-block!important;
       }
     }
@@ -1477,22 +1477,22 @@ div.post-content .table-wrapper {
         i {
           text-align: center;
           width: 1.25em;
-          padding-top: .44rem;
+          padding-top: 0.44rem;
         }
       }
 
       #mode-toggle-wrapper {
-        font-size: .9rem;
+        font-size: 0.9rem;
         i {
           @include icon-round(2rem);
-          padding-top: .44rem;
+          padding-top: 0.44rem;
           bottom: 0;
         }
       }
 
       .icon-border {
         @include ml-mr(.2rem);
-        margin-top: .85rem;
+        margin-top: 0.85rem;
         +a {
           margin-left: 0;
         }
@@ -1506,7 +1506,7 @@ div.post-content .table-wrapper {
 
   #search-result-wrapper {
     width: calc(100% - #{$sidebar-width-large});
-    >div {
+    > div {
       max-width: #{$main-content-max-width};
     }
   }
diff --git a/assets/css/_addon/module.scss b/assets/css/_addon/module.scss
index 283fe56..94505f4 100644
--- a/assets/css/_addon/module.scss
+++ b/assets/css/_addon/module.scss
@@ -100,14 +100,14 @@
 }
 
 @mixin panel-label {
+  @include label(inherit);
   display: block;
   line-height: 1.2;
-  padding-top: .5rem;
-  padding-bottom: .5rem;
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
   margin-top: 0;
   margin-bottom: 0;
   letter-spacing: -0.02em;
-  @include label(inherit);
 }
 
 @mixin align-center {
diff --git a/assets/css/archives.scss b/assets/css/archives.scss
index b13a854..db6224a 100644
--- a/assets/css/archives.scss
+++ b/assets/css/archives.scss
@@ -33,7 +33,7 @@
       background-image: linear-gradient(
         to left, #fff, #fbfbfb, #fbfbfb, #fbfbfb, #fff);
     }
-    >div {
+    > div {
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -111,12 +111,12 @@
   } // #archives .date
 
   ul {
-    >li {
-      >div>a {
+    > li {
+      > div > a {
         /* post title in Archvies */
         margin-left: 2.5rem;
         position: relative;
-        top: .1rem;
+        top: 0.1rem;
       }
       &::after {
         @extend %date-timeline;
@@ -129,10 +129,10 @@
         top: -1.61rem;
       }
     }
-    &:not(:last-child)>li:last-child::after {
+    &:not(:last-child) > li:last-child::after {
       height: 3.4rem;
     }
-    &:last-child>li:last-child::after {
+    &:last-child > li:last-child::after {
       display: none;
     }
   } // #archives ul
diff --git a/assets/css/categories.scss b/assets/css/categories.scss
index c7b7a54..a72ebe9 100644
--- a/assets/css/categories.scss
+++ b/assets/css/categories.scss
@@ -22,7 +22,7 @@
     border-left: none;
     border-right: none;
     padding-left: 2rem;
-    >i {
+    > i {
       @extend %category-icon-color;
     }
     &:first-child {
@@ -32,7 +32,7 @@
 
   }
 
-  .card-header>span>i:first-child {
+  .card-header > span > i:first-child {
     @extend %category-icon-color;
   }
 
@@ -50,9 +50,9 @@
   border-radius: 50%;
   text-align: center;
   color: #6c757d!important;
-  >i.fas {
+  > i.fas {
     position: relative;
-    height: .7rem;
+    height: 0.7rem;
     width: 1rem;
     transition: 300ms ease all;
   }
@@ -68,4 +68,4 @@
   -ms-transform: rotate(-90deg); /* IE 9 */
   -webkit-transform: rotate(-90deg); /* Safari 3-8 */
   transform: rotate(-90deg);
-}
\ No newline at end of file
+}
diff --git a/assets/css/category-tag.scss b/assets/css/category-tag.scss
index 274e58e..87c2041 100644
--- a/assets/css/category-tag.scss
+++ b/assets/css/category-tag.scss
@@ -10,9 +10,9 @@
 {% include_relative _addon/main.scss %}
 
 #page-category, #page-tag {
-  ul>li {
+  ul > li {
     line-height: 1.5rem;
-    padding: .6rem 0;
+    padding: 0.6rem 0;
     &::before { // dot
       background: #999;
       width: 5px;
@@ -21,25 +21,25 @@
       display: block;
       content: "";
       position: relative;
-      top: .6rem;
-      margin-right: .5rem;
+      top: 0.6rem;
+      margin-right: 0.5rem;
     }
-    >a { /* post's title */
+    > a { /* post's title */
       font-size: 1.1rem;
       @extend %no-bottom-border;
     }
-    >span:last-child {
+    > span:last-child {
       white-space: nowrap;
     }
     /* post's date */
   }
 }
 
-#page-tag h1>i { // tag icon
+#page-tag h1 > i { // tag icon
   font-size: 1.2rem;
 }
 
-#page-category h1>i {
+#page-category h1 > i {
   font-size: 1.25rem;
 }
 
@@ -59,15 +59,15 @@ a:hover {
 
 @media all and (max-width: 576px) {
   #page-category, #page-tag {
-    ul>li {
+    ul > li {
       &::before {
         margin: 0 .5rem;
       }
-      >a {
+      > a {
         white-space: nowrap;
         overflow: hidden;
         text-overflow: ellipsis;
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/assets/css/home.scss b/assets/css/home.scss
index 50a275d..0cbf7e5 100644
--- a/assets/css/home.scss
+++ b/assets/css/home.scss
@@ -10,7 +10,7 @@
 
 #post-list {
   margin-top: 1rem;
-  padding-right: .5rem;
+  padding-right: 0.5rem;
 
   .post-preview {
     padding-top: 1.5rem;
@@ -21,13 +21,13 @@
       font-size: 1.4rem;
       margin: 0;
       ~i { // pinned icon
-        font-size: .86rem;
+        font-size: 0.86rem;
       }
     }
 
     .post-meta {
       i {
-        font-size: .73rem;
+        font-size: 0.73rem;
         &:not(:first-child) { // post-meta icons on the homepage
           margin-left: 1.5rem;
         }
@@ -35,8 +35,8 @@
     }
 
     .post-content {
-      margin-top: .6rem;
-      margin-bottom: .6rem;
+      margin-top: 0.6rem;
+      margin-bottom: 0.6rem;
       color: var(--post-list-text-color);
       >p {
         /* Make preview shorter on the homepage */
@@ -128,7 +128,7 @@
   }
 
   .pagination {
-    font-size: .85rem;
+    font-size: 0.85rem;
     .page-item .page-link {
       width: 2.2rem;
       height: 2.2rem;
@@ -142,4 +142,4 @@
   #post-list {
     padding-right: 0;
   }
-}
\ No newline at end of file
+}
diff --git a/assets/css/post.scss b/assets/css/post.scss
index 8a57d8e..77a6eec 100644
--- a/assets/css/post.scss
+++ b/assets/css/post.scss
@@ -89,20 +89,20 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   p {
     font-size: 1.1rem;
     line-height: 1.5rem;
-    margin-top: .3rem;
+    margin-top: 0.3rem;
     white-space: normal;
   }
 
   a, span {
     &::before {
       color: var(--text-muted-color);
-      font-size: .65rem;
+      font-size: 0.65rem;
       text-transform: uppercase;
     }
     &:first-child {
       border-top-right-radius: 0;
       border-bottom-right-radius: 0;
-      left: .5px;
+      left: 0.5px;
       &::before {
         content: $prompt-older
       }
@@ -110,7 +110,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     &:last-child {
       border-top-left-radius: 0;
       border-bottom-left-radius: 0;
-      right: .5px;
+      right: 0.5px;
       &::before {
         content: $prompt-newer
       }
@@ -148,8 +148,8 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
 
 #toc li>a {
   line-height: 1rem;
-  padding-top: .5rem;
-  padding-bottom: .5rem;
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
 }
 
 
@@ -181,8 +181,8 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   }
 
   p {
-    font-size: .9rem;
-    margin-bottom: .5rem;
+    font-size: 0.9rem;
+    margin-bottom: 0.5rem;
     overflow: hidden;
     text-overflow: ellipsis;
     display: -webkit-box;
@@ -233,7 +233,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     font-size: 1.2rem;
     a {
       &:not(:last-child) {
-        margin-right: .25rem;
+        margin-right: 0.25rem;
       }
       &:hover {
         text-decoration: none;
@@ -243,7 +243,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
       }
     }
     >i {
-      padding-top: .35rem;
+      padding-top: 0.35rem;
       &:hover {
         @extend %btn-share-hovor;
       }
@@ -291,7 +291,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     font-weight: 400;
   }
   span:last-child {
-    font-size: .85rem;
+    font-size: 0.85rem;
   }
 } // .license-wrapper
 
@@ -320,8 +320,8 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
         content: "\2022";
         color: rgba(158, 158, 158, 0.8);
         font-weight: bold;
-        padding-left: .5rem;
-        padding-right: .3rem;
+        padding-left: 0.5rem;
+        padding-right: 0.3rem;
       }
       &.flex-column {
         -webkit-box-orient: horizontal!important;
diff --git a/assets/css/tags.scss b/assets/css/tags.scss
index 0b708fb..e8e4f8c 100644
--- a/assets/css/tags.scss
+++ b/assets/css/tags.scss
@@ -12,7 +12,7 @@
 .tag {
   border-radius: 0.7em;
   padding: 6px 8px 7px;
-  margin-right: .8rem;
+  margin-right: 0.8rem;
   line-height: 3rem;
   letter-spacing: 0;
   border: 1px solid var(--tag-border) !important;
@@ -22,4 +22,4 @@
     font-size: 0.7em;
     font-family: 'Oswald', sans-serif;
   }
-}
\ No newline at end of file
+}