diff --git a/.vitepress/theme/layouts/Article.vue b/.vitepress/theme/layouts/Article.vue
index a29aa8f..2abf87b 100644
--- a/.vitepress/theme/layouts/Article.vue
+++ b/.vitepress/theme/layouts/Article.vue
@@ -134,13 +134,13 @@ if (typeof window !== "undefined") {
 
 <template>
   <Header />
-  <section id="article-content">
+  <main id="article-content">
     <Content />
     <PrevNext />
-  </section>
-  <section id="article-indicator">
+  </main>
+  <div id="article-indicator">
     <PageIndicator />
-  </section>
+  </div>
   <ImageViewer
     v-if="showImageViewer"
     :images="articleImages"
diff --git a/.vitepress/theme/styles/layouts/Article.scss b/.vitepress/theme/styles/layouts/Article.scss
index 0175de4..ed8e376 100644
--- a/.vitepress/theme/styles/layouts/Article.scss
+++ b/.vitepress/theme/styles/layouts/Article.scss
@@ -1,756 +1,746 @@
 @use "../mixin";
 
-section {
-  &#article-content {
-    display: flex;
-    flex-direction: column;
-    grid-column: 1 / 10;
+main#article-content {
+  display: flex;
+  flex-direction: column;
+  grid-column: 1 / 10;
 
-    & > div {
-      width: 100%;
+  & > div {
+    width: 100%;
+  }
+
+  *[class^="language-"] {
+    position: relative;
+
+    margin-block-end: 12px;
+
+    border-radius: var(--md-sys-shape-corner-large-increased);
+
+    overflow: hidden;
+
+    button.copy {
+      position: absolute;
+      right: 0px;
+      top: 0px;
+
+      height: 42px;
+      width: 42px;
+
+      margin-block-start: 6px;
+      margin-inline-end: 6px;
+      padding: 0px;
+
+      border: none;
+      border-radius: var(--md-sys-shape-corner-extra-large);
+
+      background-color: transparent;
+
+      cursor: pointer;
+      opacity: 0;
+      transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
+        opacity var(--md-sys-motion-spring-default-effect-duration) var(--md-sys-motion-spring-default-effect);
+      visibility: hidden;
+      z-index: 2;
+
+      &::before {
+        @include mixin.material-symbols($name: "content_copy", $size: 18, $line-height: 42);
+
+        color: var(--md-ref-palette-neutral90);
+      }
+
+      &:active {
+        border-radius: var(--md-sys-shape-corner-large);
+      }
+
+      &:focus-visible {
+        @include mixin.focus-ring($thickness: 2, $z-index: 3);
+
+        outline-color: var(--md-ref-palette-neutral90) !important;
+      }
     }
 
-    *[class^="language-"] {
-      position: relative;
+    span.lang {
+      @include mixin.typescale-style("body-medium", $font-family: Source Code Pro, $font-variation-settings: "wght" 700);
 
-      margin-block-end: 12px;
+      position: absolute;
+      right: 0px;
+      top: 0px;
 
-      border-radius: var(--md-sys-shape-corner-large-increased);
+      margin-block-start: 6px;
+      margin-inline-end: 9px;
 
-      overflow: hidden;
+      color: var(--md-ref-palette-neutral50);
+      text-transform: uppercase;
+
+      transition: color var(--md-sys-motion-spring-default-effect-duration) var(--md-sys-motion-spring-default-effect);
+      z-index: 1;
+    }
+
+    pre.shiki {
+      grid-column: 2/3;
+      grid-row: 1;
+
+      margin: 0px;
+      padding-block: 15px;
+
+      overflow: overlay;
+      z-index: 0;
+
+      code {
+        padding: 0px;
+      }
+    }
+
+    div.line-numbers-wrapper {
+      grid-column: 1/2;
+      grid-row: 1;
+
+      width: max-content;
+
+      padding-block: 15px;
+      padding-inline: 12px;
+
+      text-align: right;
+      vertical-align: middle;
+
+      color: var(--md-ref-palette-neutral-variant50);
+
+      border-right: 1px solid var(--md-ref-palette-neutral-variant50);
+      background-color: var(--md-ref-palette-neutral10);
+
+      user-select: none;
+      -moz-user-select: none;
+      z-index: 0;
+
+      span {
+        @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
+      }
+    }
+
+    &.line-numbers-mode {
+      display: grid;
+      grid-template-columns: max-content auto;
+    }
+
+    &:hover {
+      span.lang {
+        opacity: 0;
+        visibility: hidden;
+      }
 
       button.copy {
-        position: absolute;
-        right: 0px;
-        top: 0px;
+        opacity: 1;
+        visibility: visible;
 
-        height: 42px;
-        width: 42px;
+        &:hover {
+          background-color: var(--md-ref-palette-neutral10);
 
-        margin-block-start: 6px;
-        margin-inline-end: 6px;
-        padding: 0px;
-
-        border: none;
-        border-radius: var(--md-sys-shape-corner-extra-large);
-
-        background-color: transparent;
-
-        cursor: pointer;
-        opacity: 0;
-        transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial),
-          opacity var(--md-sys-motion-spring-default-effect-duration) var(--md-sys-motion-spring-default-effect);
-        visibility: hidden;
-        z-index: 2;
-
-        &::before {
-          @include mixin.material-symbols($name: "content_copy", $size: 18, $line-height: 42);
-
-          color: var(--md-ref-palette-neutral90);
-        }
-
-        &:active {
-          border-radius: var(--md-sys-shape-corner-large);
-        }
-
-        &:focus-visible {
-          @include mixin.focus-ring($thickness: 2, $z-index: 3);
-
-          outline-color: var(--md-ref-palette-neutral90) !important;
-        }
-      }
-
-      span.lang {
-        @include mixin.typescale-style("body-medium", $font-family: Source Code Pro, $font-variation-settings: "wght" 700);
-
-        position: absolute;
-        right: 0px;
-        top: 0px;
-
-        margin-block-start: 6px;
-        margin-inline-end: 9px;
-
-        color: var(--md-ref-palette-neutral50);
-        text-transform: uppercase;
-
-        transition: color var(--md-sys-motion-spring-default-effect-duration) var(--md-sys-motion-spring-default-effect);
-        z-index: 1;
-      }
-
-      pre.shiki {
-        grid-column: 2/3;
-        grid-row: 1;
-
-        margin: 0px;
-        padding-block: 15px;
-
-        overflow: overlay;
-        z-index: 0;
-
-        code {
-          padding: 0px;
-        }
-      }
-
-      div.line-numbers-wrapper {
-        grid-column: 1/2;
-        grid-row: 1;
-
-        width: max-content;
-
-        padding-block: 15px;
-        padding-inline: 12px;
-
-        text-align: right;
-        vertical-align: middle;
-
-        color: var(--md-ref-palette-neutral-variant50);
-
-        border-right: 1px solid var(--md-ref-palette-neutral-variant50);
-        background-color: var(--md-ref-palette-neutral10);
-
-        user-select: none;
-        -moz-user-select: none;
-        z-index: 0;
-
-        span {
-          @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
-        }
-      }
-
-      &.line-numbers-mode {
-        display: grid;
-        grid-template-columns: max-content auto;
-      }
-
-      &:hover {
-        span.lang {
-          opacity: 0;
-          visibility: hidden;
-        }
-
-        button.copy {
-          opacity: 1;
-          visibility: visible;
-
-          &:hover {
-            background-color: var(--md-ref-palette-neutral10);
-
-            &::before {
-              color: var(--md-ref-palette-neutral90);
-            }
+          &::before {
+            color: var(--md-ref-palette-neutral90);
           }
         }
       }
     }
+  }
 
-    .custom-block {
-      display: grid;
-      column-gap: 12px;
-      grid-template-columns: 24px auto;
+  .custom-block {
+    display: grid;
+    column-gap: 12px;
+    grid-template-columns: 24px auto;
 
-      position: relative;
+    position: relative;
 
-      margin-block-end: 12px;
-      padding-block: 12px;
-      padding-inline: 12px;
+    margin-block-end: 12px;
+    padding-block: 12px;
+    padding-inline: 12px;
 
-      border-radius: var(--md-sys-shape-corner-large-increased);
+    border-radius: var(--md-sys-shape-corner-large-increased);
 
-      z-index: 0;
+    z-index: 0;
+
+    &::before {
+      @include mixin.material-symbols($size: 24);
+
+      grid-column: 1;
+    }
+
+    p.custom-block-title {
+      grid-column: 2;
+
+      margin: 0px;
+      padding: 0px;
+
+      font-variation-settings: "wght" 700;
+
+      user-select: none;
+      -moz-user-select: none;
+    }
+
+    > * {
+      grid-column: 2 / 3;
+
+      margin-inline: 0px;
+      padding-block: 0px;
+    }
+
+    &.details {
+      display: block;
+      transition: background-color var(--md-sys-motion-spring-slow-effect-duration) var(--md-sys-motion-spring-slow-effect);
+
+      padding: 0px;
 
       &::before {
-        @include mixin.material-symbols($size: 24);
-
-        grid-column: 1;
+        display: none;
       }
 
-      p.custom-block-title {
-        grid-column: 2;
+      summary {
+        @include mixin.typescale-style("body-large");
 
-        margin: 0px;
-        padding: 0px;
+        display: grid;
+        column-gap: 12px;
+        grid-template-columns: 24px auto;
+
+        padding-block: 12px;
+        padding-inline: 12px;
 
         font-variation-settings: "wght" 700;
 
+        border-radius: var(--md-sys-shape-corner-large-increased);
+
+        cursor: pointer;
+        transition: var(--md-sys-motion-spring-slow-spatial-standard-duration)
+          var(--md-sys-motion-spring-slow-spatial-standard);
         user-select: none;
         -moz-user-select: none;
-      }
-
-      > * {
-        grid-column: 2 / 3;
-
-        margin-inline: 0px;
-        padding-block: 0px;
-      }
-
-      &.details {
-        display: block;
-        transition: background-color var(--md-sys-motion-spring-slow-effect-duration) var(--md-sys-motion-spring-slow-effect);
-
-        padding: 0px;
 
         &::before {
-          display: none;
+          @include mixin.material-symbols("expand_more");
+
+          font-variation-settings: "wght" 500;
+
+          transform: rotateZ(-90deg);
+          transition: var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
         }
 
+        &:focus-visible {
+          @include mixin.focus-ring($thickness: 3);
+        }
+      }
+
+      :not(summary) {
+        margin-inline: 12px;
+      }
+
+      img {
+        display: block;
+      }
+
+      &:hover {
+        background-color: var(--md-sys-color-inverse-on-surface);
+      }
+
+      &[open] {
+        padding-block-end: 12px;
+
+        background-color: var(--md-sys-color-inverse-on-surface);
+
         summary {
-          @include mixin.typescale-style("body-large");
-
-          display: grid;
-          column-gap: 12px;
-          grid-template-columns: 24px auto;
-
-          padding-block: 12px;
-          padding-inline: 12px;
-
-          font-variation-settings: "wght" 700;
-
-          border-radius: var(--md-sys-shape-corner-large-increased);
-
-          cursor: pointer;
-          transition: var(--md-sys-motion-spring-slow-spatial-standard-duration)
-            var(--md-sys-motion-spring-slow-spatial-standard);
-          user-select: none;
-          -moz-user-select: none;
-
-          &::before {
-            @include mixin.material-symbols("expand_more");
-
-            font-variation-settings: "wght" 500;
-
-            transform: rotateZ(-90deg);
-            transition: var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
-          }
-
-          &:focus-visible {
-            @include mixin.focus-ring($thickness: 3);
-          }
-        }
-
-        :not(summary) {
-          margin-inline: 12px;
-        }
-
-        img {
-          display: block;
-        }
-
-        &:hover {
-          background-color: var(--md-sys-color-inverse-on-surface);
-        }
-
-        &[open] {
           padding-block-end: 12px;
 
-          background-color: var(--md-sys-color-inverse-on-surface);
-
-          summary {
-            padding-block-end: 12px;
-
-            &::before {
-              transform: rotateZ(0deg);
-            }
+          &::before {
+            transform: rotateZ(0deg);
           }
         }
       }
-
-      &.info {
-        color: var(--md-sys-color-on-blue-container);
-
-        background-color: var(--md-sys-color-blue-container);
-
-        &::before {
-          content: "info";
-
-          color: var(--md-sys-color-on-blue-container);
-        }
-      }
-
-      &.tip {
-        color: var(--md-sys-color-on-green-container);
-
-        background-color: var(--md-sys-color-green-container);
-
-        &::before {
-          content: "lightbulb_2";
-
-          color: var(--md-sys-color-on-green-container);
-        }
-      }
-
-      &.warning {
-        color: var(--md-sys-color-on-yellow-container);
-
-        background-color: var(--md-sys-color-yellow-container);
-
-        &::before {
-          content: "brightness_alert";
-
-          color: var(--md-sys-color-on-yellow-container);
-        }
-      }
-
-      &.danger {
-        color: var(--md-sys-color-on-red-container);
-
-        background-color: var(--md-sys-color-red-container);
-
-        &::before {
-          content: "dangerous";
-
-          color: var(--md-sys-color-on-red-container);
-        }
-      }
     }
 
-    .headline-block {
-      position: relative;
+    &.info {
+      color: var(--md-sys-color-on-blue-container);
 
-      padding-block-end: 12px;
-      padding-inline-start: 24px;
+      background-color: var(--md-sys-color-blue-container);
 
-      a.title-anchor {
-        @include mixin.typescale-style("body-large");
+      &::before {
+        content: "info";
 
-        display: inline-flex;
-        align-items: center;
-        flex-direction: column;
-        gap: 6px;
+        color: var(--md-sys-color-on-blue-container);
+      }
+    }
 
-        position: absolute;
-        left: -54px;
-        top: 0px;
+    &.tip {
+      color: var(--md-sys-color-on-green-container);
+
+      background-color: var(--md-sys-color-green-container);
+
+      &::before {
+        content: "lightbulb_2";
+
+        color: var(--md-sys-color-on-green-container);
+      }
+    }
+
+    &.warning {
+      color: var(--md-sys-color-on-yellow-container);
+
+      background-color: var(--md-sys-color-yellow-container);
+
+      &::before {
+        content: "brightness_alert";
+
+        color: var(--md-sys-color-on-yellow-container);
+      }
+    }
+
+    &.danger {
+      color: var(--md-sys-color-on-red-container);
+
+      background-color: var(--md-sys-color-red-container);
+
+      &::before {
+        content: "dangerous";
+
+        color: var(--md-sys-color-on-red-container);
+      }
+    }
+  }
+
+  .headline-block {
+    position: relative;
+
+    padding-block-end: 12px;
+    padding-inline-start: 24px;
+
+    a.title-anchor {
+      @include mixin.typescale-style("body-large");
+
+      display: inline-flex;
+      align-items: center;
+      flex-direction: column;
+      gap: 6px;
+
+      position: absolute;
+      left: -54px;
+      top: 0px;
+
+      height: 54px;
+      width: 54px;
+
+      color: var(--md-sys-color-on-surface);
+      text-decoration: none;
+
+      border-radius: var(--md-sys-shape-corner-full);
+
+      opacity: 0;
+      transition: var(--md-sys-motion-spring-fast-effect-duration) var(--md-sys-motion-spring-fast-effect);
+      user-select: none;
+      -moz-user-select: none;
+
+      &:focus-visible {
+        @include mixin.focus-ring($thickness: 2, $z-index: 2);
+
+        opacity: 1;
+
+        span:nth-of-type(1) {
+          opacity: 1;
+        }
+      }
+
+      span:nth-of-type(1) {
+        @include mixin.material-symbols($size: 24);
+
+        display: block;
 
         height: 54px;
         width: 54px;
 
-        color: var(--md-sys-color-on-surface);
-        text-decoration: none;
+        line-height: 54px;
+        text-align: center;
 
         border-radius: var(--md-sys-shape-corner-full);
 
+        background-color: transparent;
+
         opacity: 0;
-        transition: var(--md-sys-motion-spring-fast-effect-duration) var(--md-sys-motion-spring-fast-effect);
-        user-select: none;
-        -moz-user-select: none;
-
-        &:focus-visible {
-          @include mixin.focus-ring($thickness: 2, $z-index: 2);
-
-          opacity: 1;
-
-          span:nth-of-type(1) {
-            opacity: 1;
-          }
-        }
-
-        span:nth-of-type(1) {
-          @include mixin.material-symbols($size: 24);
-
-          display: block;
-
-          height: 54px;
-          width: 54px;
-
-          line-height: 54px;
-          text-align: center;
-
-          border-radius: var(--md-sys-shape-corner-full);
-
-          background-color: transparent;
-
-          opacity: 0;
-        }
-
-        span.visually-hidden {
-          @include mixin.typescale-style("label-medium");
-
-          padding-block: 3px;
-          padding-inline: 9px;
-
-          word-break: keep-all;
-
-          border-radius: var(--md-sys-shape-corner-small);
-
-          background-color: var(--md-sys-color-surface-container-low);
-
-          opacity: 0;
-          visibility: hidden;
-        }
       }
 
-      h1,
-      h2,
-      h3,
-      h4,
-      h5,
-      h6 {
-        display: inline-block;
+      span.visually-hidden {
+        @include mixin.typescale-style("label-medium");
 
-        padding-block-end: 12px;
+        padding-block: 3px;
+        padding-inline: 9px;
 
-        line-height: 54px;
-
-        a {
-          text-decoration: none;
-        }
-      }
-
-      &:hover {
-        a.title-anchor {
-          opacity: 1;
-
-          span:nth-of-type(1) {
-            opacity: 1;
-          }
-
-          &:hover {
-            span:nth-of-type(1):hover {
-              background-color: var(--md-sys-color-surface-container-low);
-
-              + span.visually-hidden {
-                opacity: 1;
-                visibility: visible;
-              }
-            }
-          }
-        }
-      }
-    }
-
-    a {
-      text-decoration: underline solid;
-    }
-
-    blockquote {
-      position: relative;
-
-      margin-inline: 0px;
-      padding-inline-start: 24px;
-
-      color: var(--md-sys-color-on-tertiary-container);
-
-      &::before {
-        content: "";
-
-        display: block;
-
-        position: absolute;
-        left: calc(24px / 2 - 3px);
-
-        height: 100%;
-        width: 6px;
+        word-break: keep-all;
 
         border-radius: var(--md-sys-shape-corner-small);
 
-        background-color: var(--md-sys-color-inverse-on-surface);
-      }
+        background-color: var(--md-sys-color-surface-container-low);
 
-      blockquote {
-        margin-inline: 12px;
-      }
-
-      p {
-        margin-block: 12px;
-        margin-inline: 0px;
-        padding-block-end: 0px;
-      }
-
-      .task-list-container {
-        padding-block-end: 0px;
-        padding-inline: 0px;
-
-        li.task-list-item {
-          display: grid;
-          align-items: center;
-          gap: 12px;
-          grid-template-columns: 20px auto;
-
-          input.task-list-item-checkbox[type="checkbox"] {
-            &::before {
-              @include mixin.material-symbols("check_box_outline_blank", $size: 20);
-
-              font-variation-settings: "FILL" 1;
-            }
-
-            appearance: none;
-
-            grid-column: 1 / 2;
-
-            margin: 0px;
-
-            height: 20px;
-            width: 20px;
-
-            &:checked {
-              &::before {
-                @include mixin.material-symbols("check_box", $size: 20);
-              }
-            }
-          }
-
-          &::before {
-            display: none;
-          }
-        }
-      }
-
-      & > {
-        ul,
-        ol {
-          margin-inline: 0px;
-        }
+        opacity: 0;
+        visibility: hidden;
       }
     }
 
-    code {
-      @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
-
+    h1,
+    h2,
+    h3,
+    h4,
+    h5,
+    h6 {
       display: inline-block;
 
-      width: max-content;
+      padding-block-end: 12px;
 
-      padding-block: 24px;
+      line-height: 54px;
 
-      text-indent: initial;
-      vertical-align: baseline;
-      word-break: break-word;
+      a {
+        text-decoration: none;
+      }
+    }
+
+    &:hover {
+      a.title-anchor {
+        opacity: 1;
+
+        span:nth-of-type(1) {
+          opacity: 1;
+        }
+
+        &:hover {
+          span:nth-of-type(1):hover {
+            background-color: var(--md-sys-color-surface-container-low);
+
+            + span.visually-hidden {
+              opacity: 1;
+              visibility: visible;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  a {
+    text-decoration: underline solid;
+  }
+
+  blockquote {
+    position: relative;
+
+    margin-inline: 0px;
+    padding-inline-start: 24px;
+
+    color: var(--md-sys-color-on-tertiary-container);
+
+    &::before {
+      content: "";
+
+      display: block;
+
+      position: absolute;
+      left: calc(24px / 2 - 3px);
+
+      height: 100%;
+      width: 6px;
 
       border-radius: var(--md-sys-shape-corner-small);
 
-      overflow: initial;
-
-      &::selection {
-        color: var(--md-sys-color-on-tertiary);
-
-        background-color: var(--md-sys-color-tertiary);
-      }
-
-      span.line {
-        display: inline-block;
-
-        width: 100%;
-
-        padding-inline: 12px;
-
-        &.highlighted {
-          background-color: var(--md-ref-palette-neutral10);
-
-          span {
-            background-color: var(--md-ref-palette-neutral10);
-          }
-        }
-
-        span {
-          @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
-        }
-      }
+      background-color: var(--md-sys-color-inverse-on-surface);
     }
 
-    hr {
-      margin-block-end: 24px;
-      margin-block-start: 12px;
+    blockquote {
+      margin-inline: 12px;
     }
 
     p {
-      position: relative;
+      margin-block: 12px;
+      margin-inline: 0px;
+      padding-block-end: 0px;
+    }
 
-      margin-block-start: 12px;
-      padding-block-end: 12px;
+    .task-list-container {
+      padding-block-end: 0px;
+      padding-inline: 0px;
 
-      code {
-        @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
-        display: inline;
+      li.task-list-item {
+        display: grid;
+        align-items: center;
+        gap: 12px;
+        grid-template-columns: 20px auto;
 
-        min-width: max-content;
+        input.task-list-item-checkbox[type="checkbox"] {
+          &::before {
+            @include mixin.material-symbols("check_box_outline_blank", $size: 20);
 
-        padding: 0px;
+            font-variation-settings: "FILL" 1;
+          }
 
-        vertical-align: baseline;
-      }
+          appearance: none;
 
-      em {
-        display: inline-block;
+          grid-column: 1 / 2;
 
-        font-style: normal;
+          margin: 0px;
 
-        transform: skewX(-10deg);
-      }
+          height: 20px;
+          width: 20px;
 
-      s {
-        opacity: 0.5;
-      }
+          &:checked {
+            &::before {
+              @include mixin.material-symbols("check_box", $size: 20);
+            }
+          }
+        }
 
-      strong {
-        font-variation-settings: "wght" 700;
-      }
-
-      img {
-        width: calc(50% - 6px);
-
-        margin-inline: 3px;
-
-        border-radius: var(--md-sys-shape-corner-medium);
-
-        cursor: pointer;
-        transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
-
-        &:hover {
-          border-radius: var(--md-sys-shape-corner-extra-large);
+        &::before {
+          display: none;
         }
       }
     }
 
-    pre {
-      padding-block-end: 12px;
-
-      overflow: overlay;
-
-      &.shiki {
-        position: relative;
+    & > {
+      ul,
+      ol {
+        margin-inline: 0px;
       }
     }
+  }
+
+  code {
+    @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
+
+    display: inline-block;
+
+    width: max-content;
+
+    padding-block: 24px;
+
+    text-indent: initial;
+    vertical-align: baseline;
+    word-break: break-word;
+
+    border-radius: var(--md-sys-shape-corner-small);
+
+    overflow: initial;
+
+    &::selection {
+      color: var(--md-sys-color-on-tertiary);
+
+      background-color: var(--md-sys-color-tertiary);
+    }
+
+    span.line {
+      display: inline-block;
+
+      width: 100%;
+
+      padding-inline: 12px;
+
+      &.highlighted {
+        background-color: var(--md-ref-palette-neutral10);
+
+        span {
+          background-color: var(--md-ref-palette-neutral10);
+        }
+      }
+
+      span {
+        @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
+      }
+    }
+  }
+
+  hr {
+    margin-block-end: 24px;
+    margin-block-start: 12px;
+  }
+
+  p {
+    position: relative;
+
+    margin-block-start: 12px;
+    padding-block-end: 12px;
+
+    code {
+      @include mixin.typescale-style("body-large", $font-family: Source Code Pro);
+      display: inline;
+
+      min-width: max-content;
+
+      padding: 0px;
+
+      vertical-align: baseline;
+    }
+
+    em {
+      display: inline-block;
+
+      font-style: normal;
+
+      transform: skewX(-10deg);
+    }
+
+    s {
+      opacity: 0.5;
+    }
 
     strong {
       font-variation-settings: "wght" 700;
     }
 
-    sup.footnote-ref {
-      position: absolute;
-      top: -10px;
+    img {
+      width: calc(50% - 6px);
 
-      a[href] {
-        @include mixin.typescale-style("label-small");
+      margin-inline: 3px;
 
-        text-decoration: none;
-      }
-    }
+      border-radius: var(--md-sys-shape-corner-medium);
 
-    table {
-      margin-block-end: 12px;
-    }
+      cursor: pointer;
+      transition: border-radius var(--md-sys-motion-spring-fast-spatial-duration) var(--md-sys-motion-spring-fast-spatial);
 
-    ul,
-    ol {
-      padding-block-end: 12px;
-
-      li {
-        @include mixin.typescale-style("body-large");
-
-        position: relative;
-
-        margin-block-start: 12px;
-
-        vertical-align: middle;
-
-        code {
-          display: inline;
-
-          padding: 0px;
-        }
-
-        ul {
-          padding: 0px;
-        }
-      }
-    }
-
-    ol {
-      li {
-        &::marker {
-          font-variation-settings: "wght" 700;
-        }
-
-        p {
-          margin-inline: 0px;
-          padding-block: 0px;
-        }
-      }
-    }
-
-    ul {
-      padding-inline-start: 24px;
-
-      list-style-type: none;
-
-      li {
-        position: relative;
-
-        &::before {
-          content: "";
-
-          display: inline-block;
-          position: absolute;
-          left: -20px;
-          top: var(--bullet-top);
-
-          height: 16px;
-          width: 16px;
-
-          background-color: var(--md-sys-color-on-surface);
-
-          -webkit-mask: var(--via-svg-list-bullet) 0 0/100% no-repeat;
-          mask: var(--via-svg-list-bullet) 0 0/100% no-repeat;
-
-          transform: rotate(var(--random-rotation, 0deg));
-        }
+      &:hover {
+        border-radius: var(--md-sys-shape-corner-extra-large);
       }
     }
   }
 
-  &#article-indicator {
-    grid-column: 10 / 13;
+  pre {
+    padding-block-end: 12px;
 
-    position: sticky;
-    top: 120px;
+    overflow: overlay;
+
+    &.shiki {
+      position: relative;
+    }
+  }
+
+  strong {
+    font-variation-settings: "wght" 700;
+  }
+
+  sup.footnote-ref {
+    position: absolute;
+    top: -10px;
+
+    a[href] {
+      @include mixin.typescale-style("label-small");
+
+      text-decoration: none;
+    }
+  }
+
+  table {
+    margin-block-end: 12px;
+  }
+
+  ul,
+  ol {
+    padding-block-end: 12px;
+
+    li {
+      @include mixin.typescale-style("body-large");
+
+      position: relative;
+
+      margin-block-start: 12px;
+
+      vertical-align: middle;
+
+      code {
+        display: inline;
+
+        padding: 0px;
+      }
+
+      ul {
+        padding: 0px;
+      }
+    }
+  }
+
+  ol {
+    li {
+      &::marker {
+        font-variation-settings: "wght" 700;
+      }
+
+      p {
+        margin-inline: 0px;
+        padding-block: 0px;
+      }
+    }
+  }
+
+  ul {
+    padding-inline-start: 24px;
+
+    list-style-type: none;
+
+    li {
+      position: relative;
+
+      &::before {
+        content: "";
+
+        display: inline-block;
+        position: absolute;
+        left: -20px;
+        top: var(--bullet-top);
+
+        height: 16px;
+        width: 16px;
+
+        background-color: var(--md-sys-color-on-surface);
+
+        -webkit-mask: var(--via-svg-list-bullet) 0 0/100% no-repeat;
+        mask: var(--via-svg-list-bullet) 0 0/100% no-repeat;
+
+        transform: rotate(var(--random-rotation, 0deg));
+      }
+    }
   }
 }
 
-@media screen and (max-width: 1600px) {
-  section {
-    &#article-content {
-      grid-column: 1 / 10;
-    }
+div#article-indicator {
+  grid-column: 10 / 13;
 
-    &#article-indicator {
-      grid-column: 10 / 13;
-    }
+  position: sticky;
+  top: 120px;
+}
+
+@media screen and (max-width: 1600px) {
+  main#article-content {
+    grid-column: 1 / 10;
+  }
+
+  div#article-indicator {
+    grid-column: 10 / 13;
   }
 }
 
 @media screen and (max-width: 1200px) {
-  section {
-    &#article-content {
-      grid-column: 1 / 7;
-    }
+  main#article-content {
+    grid-column: 1 / 7;
+  }
 
-    &#article-indicator {
-      grid-column: 7 / 9;
-    }
+  div#article-indicator {
+    grid-column: 7 / 9;
   }
 }
 
 @media screen and (max-width: 840px) {
-  section {
-    &#article-content {
-      grid-column: 1 / 7;
-    }
+  main#article-content {
+    grid-column: 1 / 7;
+  }
 
-    &#article-indicator {
-      grid-column: 5 / 7;
-    }
+  div#article-indicator {
+    grid-column: 5 / 7;
   }
 }
 
 @media screen and (max-width: 600px) {
-  section {
-    &#article-content {
-      grid-column: 1 / 5;
-    }
+  main#article-content {
+    grid-column: 1 / 5;
+  }
 
-    &#article-indicator {
-      grid-column: 3 / 5;
-    }
+  div#article-indicator {
+    grid-column: 3 / 5;
   }
 }