diff --git a/src/preview-template.html b/src/preview-template.html
index fa8624e..22797f7 100644
--- a/src/preview-template.html
+++ b/src/preview-template.html
@@ -21,13 +21,44 @@
       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
       */
 
+      .markdown-body {
+        --base-size-4: 0.25rem;
+        --base-size-8: 0.5rem;
+        --base-size-16: 1rem;
+        --base-text-weight-normal: 400;
+        --base-text-weight-medium: 500;
+        --base-text-weight-semibold: 600;
+        --fontStack-monospace: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
+      }
+
       @media (prefers-color-scheme: dark) {
         .markdown-body,
         [data-theme="dark"] {
           /*dark*/
           color-scheme: dark;
+          --focus-outlineColor: #1f6feb;
+          --fgColor-default: #e6edf3;
+          --fgColor-muted: #8d96a0;
+          --fgColor-accent: #4493f8;
+          --fgColor-success: #3fb950;
+          --fgColor-attention: #d29922;
+          --fgColor-danger: #f85149;
+          --fgColor-done: #ab7df8;
+          --bgColor-default: #0d1117;
+          --bgColor-muted: #161b22;
+          --bgColor-neutral-muted: #6e768166;
+          --bgColor-attention-muted: #bb800926;
+          --borderColor-default: #30363d;
+          --borderColor-muted: #30363db3;
+          --borderColor-neutral-muted: #6e768166;
+          --borderColor-accent-emphasis: #1f6feb;
+          --borderColor-success-emphasis: #238636;
+          --borderColor-attention-emphasis: #9e6a03;
+          --borderColor-danger-emphasis: #da3633;
+          --borderColor-done-emphasis: #8957e5;
           --color-prettylights-syntax-comment: #8b949e;
           --color-prettylights-syntax-constant: #79c0ff;
+          --color-prettylights-syntax-constant-other-reference-link: #a5d6ff;
           --color-prettylights-syntax-entity: #d2a8ff;
           --color-prettylights-syntax-storage-modifier-import: #c9d1d9;
           --color-prettylights-syntax-entity-tag: #7ee787;
@@ -35,6 +66,7 @@
           --color-prettylights-syntax-string: #a5d6ff;
           --color-prettylights-syntax-variable: #ffa657;
           --color-prettylights-syntax-brackethighlighter-unmatched: #f85149;
+          --color-prettylights-syntax-brackethighlighter-angle: #8b949e;
           --color-prettylights-syntax-invalid-illegal-text: #f0f6fc;
           --color-prettylights-syntax-invalid-illegal-bg: #8e1519;
           --color-prettylights-syntax-carriage-return-text: #f0f6fc;
@@ -53,28 +85,7 @@
           --color-prettylights-syntax-markup-ignored-text: #c9d1d9;
           --color-prettylights-syntax-markup-ignored-bg: #1158c7;
           --color-prettylights-syntax-meta-diff-range: #d2a8ff;
-          --color-prettylights-syntax-brackethighlighter-angle: #8b949e;
           --color-prettylights-syntax-sublimelinter-gutter-mark: #484f58;
-          --color-prettylights-syntax-constant-other-reference-link: #a5d6ff;
-          --color-fg-default: #e6edf3;
-          --color-fg-muted: #848d97;
-          --color-fg-subtle: #6e7681;
-          --color-canvas-default: #0d1117;
-          --color-canvas-subtle: #161b22;
-          --color-border-default: #30363d;
-          --color-border-muted: #21262d;
-          --color-neutral-muted: rgba(110,118,129,0.4);
-          --color-accent-fg: #2f81f7;
-          --color-accent-emphasis: #1f6feb;
-          --color-success-fg: #3fb950;
-          --color-success-emphasis: #238636;
-          --color-attention-fg: #d29922;
-          --color-attention-emphasis: #9e6a03;
-          --color-attention-subtle: rgba(187,128,9,0.15);
-          --color-danger-fg: #f85149;
-          --color-danger-emphasis: #da3633;
-          --color-done-fg: #a371f7;
-          --color-done-emphasis: #8957e5;
         }
       }
 
@@ -83,15 +94,37 @@
         [data-theme="light"] {
           /*light*/
           color-scheme: light;
+          --focus-outlineColor: #0969da;
+          --fgColor-default: #1f2328;
+          --fgColor-muted: #636c76;
+          --fgColor-accent: #0969da;
+          --fgColor-success: #1a7f37;
+          --fgColor-attention: #9a6700;
+          --fgColor-danger: #d1242f;
+          --fgColor-done: #8250df;
+          --bgColor-default: #ffffff;
+          --bgColor-muted: #f6f8fa;
+          --bgColor-neutral-muted: #afb8c133;
+          --bgColor-attention-muted: #fff8c5;
+          --borderColor-default: #d0d7de;
+          --borderColor-muted: #d0d7deb3;
+          --borderColor-neutral-muted: #afb8c133;
+          --borderColor-accent-emphasis: #0969da;
+          --borderColor-success-emphasis: #1a7f37;
+          --borderColor-attention-emphasis: #bf8700;
+          --borderColor-danger-emphasis: #cf222e;
+          --borderColor-done-emphasis: #8250df;
           --color-prettylights-syntax-comment: #57606a;
           --color-prettylights-syntax-constant: #0550ae;
+          --color-prettylights-syntax-constant-other-reference-link: #0a3069;
           --color-prettylights-syntax-entity: #6639ba;
           --color-prettylights-syntax-storage-modifier-import: #24292f;
-          --color-prettylights-syntax-entity-tag: #116329;
+          --color-prettylights-syntax-entity-tag: #0550ae;
           --color-prettylights-syntax-keyword: #cf222e;
           --color-prettylights-syntax-string: #0a3069;
           --color-prettylights-syntax-variable: #953800;
           --color-prettylights-syntax-brackethighlighter-unmatched: #82071e;
+          --color-prettylights-syntax-brackethighlighter-angle: #57606a;
           --color-prettylights-syntax-invalid-illegal-text: #f6f8fa;
           --color-prettylights-syntax-invalid-illegal-bg: #82071e;
           --color-prettylights-syntax-carriage-return-text: #f6f8fa;
@@ -110,28 +143,7 @@
           --color-prettylights-syntax-markup-ignored-text: #eaeef2;
           --color-prettylights-syntax-markup-ignored-bg: #0550ae;
           --color-prettylights-syntax-meta-diff-range: #8250df;
-          --color-prettylights-syntax-brackethighlighter-angle: #57606a;
           --color-prettylights-syntax-sublimelinter-gutter-mark: #8c959f;
-          --color-prettylights-syntax-constant-other-reference-link: #0a3069;
-          --color-fg-default: #1F2328;
-          --color-fg-muted: #656d76;
-          --color-fg-subtle: #6e7781;
-          --color-canvas-default: #ffffff;
-          --color-canvas-subtle: #f6f8fa;
-          --color-border-default: #d0d7de;
-          --color-border-muted: hsla(210,18%,87%,1);
-          --color-neutral-muted: rgba(175,184,193,0.2);
-          --color-accent-fg: #0969da;
-          --color-accent-emphasis: #0969da;
-          --color-success-fg: #1a7f37;
-          --color-success-emphasis: #1f883d;
-          --color-attention-fg: #9a6700;
-          --color-attention-emphasis: #9a6700;
-          --color-attention-subtle: #fff8c5;
-          --color-danger-fg: #d1242f;
-          --color-danger-emphasis: #cf222e;
-          --color-done-fg: #8250df;
-          --color-done-emphasis: #8250df;
         }
       }
 
@@ -139,12 +151,13 @@
         -ms-text-size-adjust: 100%;
         -webkit-text-size-adjust: 100%;
         margin: 0;
-        color: var(--color-fg-default);
-        background-color: var(--color-canvas-default);
+        color: var(--fgColor-default);
+        background-color: var(--bgColor-default);
         font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";
         font-size: 16px;
         line-height: 1.5;
         word-wrap: break-word;
+        scroll-behavior: auto;
       }
 
       .markdown-body .octicon {
@@ -184,7 +197,7 @@
 
       .markdown-body a {
         background-color: transparent;
-        color: var(--color-accent-fg);
+        color: var(--fgColor-accent);
         text-decoration: none;
       }
 
@@ -208,12 +221,12 @@
         font-weight: var(--base-text-weight-semibold, 600);
         padding-bottom: .3em;
         font-size: 2em;
-        border-bottom: 1px solid var(--color-border-muted);
+        border-bottom: 1px solid var(--borderColor-muted);
       }
 
       .markdown-body mark {
-        background-color: var(--color-attention-subtle);
-        color: var(--color-fg-default);
+        background-color: var(--bgColor-attention-muted);
+        color: var(--fgColor-default);
       }
 
       .markdown-body small {
@@ -240,7 +253,7 @@
         border-style: none;
         max-width: 100%;
         box-sizing: content-box;
-        background-color: var(--color-canvas-default);
+        background-color: var(--bgColor-default);
       }
 
       .markdown-body code,
@@ -259,11 +272,11 @@
         box-sizing: content-box;
         overflow: hidden;
         background: transparent;
-        border-bottom: 1px solid var(--color-border-muted);
+        border-bottom: 1px solid var(--borderColor-muted);
         height: .25em;
         padding: 0;
         margin: 24px 0;
-        background-color: var(--color-border-default);
+        background-color: var(--borderColor-default);
         border: 0;
       }
 
@@ -316,7 +329,7 @@
       }
 
       .markdown-body ::placeholder {
-        color: var(--color-fg-subtle);
+        color: var(--fgColor-muted);
         opacity: 1;
       }
 
@@ -350,14 +363,14 @@
       }
 
       .markdown-body details:not([open])>*:not(summary) {
-        display: none !important;
+        display: none;
       }
 
       .markdown-body a:focus,
       .markdown-body [role=button]:focus,
       .markdown-body input[type=radio]:focus,
       .markdown-body input[type=checkbox]:focus {
-        outline: 2px solid var(--color-accent-fg);
+        outline: 2px solid var(--focus-outlineColor);
         outline-offset: -2px;
         box-shadow: none;
       }
@@ -373,7 +386,7 @@
       .markdown-body [role=button]:focus-visible,
       .markdown-body input[type=radio]:focus-visible,
       .markdown-body input[type=checkbox]:focus-visible {
-        outline: 2px solid var(--color-accent-fg);
+        outline: 2px solid var(--focus-outlineColor);
         outline-offset: -2px;
         box-shadow: none;
       }
@@ -390,15 +403,15 @@
       .markdown-body kbd {
         display: inline-block;
         padding: 3px 5px;
-        font: 11px ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;
+        font: 11px var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);
         line-height: 10px;
-        color: var(--color-fg-default);
+        color: var(--fgColor-default);
         vertical-align: middle;
-        background-color: var(--color-canvas-subtle);
-        border: solid 1px var(--color-neutral-muted);
-        border-bottom-color: var(--color-neutral-muted);
+        background-color: var(--bgColor-muted);
+        border: solid 1px var(--borderColor-neutral-muted);
+        border-bottom-color: var(--borderColor-neutral-muted);
         border-radius: 6px;
-        box-shadow: inset 0 -1px 0 var(--color-neutral-muted);
+        box-shadow: inset 0 -1px 0 var(--borderColor-neutral-muted);
       }
 
       .markdown-body h1,
@@ -417,7 +430,7 @@
         font-weight: var(--base-text-weight-semibold, 600);
         padding-bottom: .3em;
         font-size: 1.5em;
-        border-bottom: 1px solid var(--color-border-muted);
+        border-bottom: 1px solid var(--borderColor-muted);
       }
 
       .markdown-body h3 {
@@ -438,7 +451,7 @@
       .markdown-body h6 {
         font-weight: var(--base-text-weight-semibold, 600);
         font-size: .85em;
-        color: var(--color-fg-muted);
+        color: var(--fgColor-muted);
       }
 
       .markdown-body p {
@@ -449,8 +462,8 @@
       .markdown-body blockquote {
         margin: 0;
         padding: 0 1em;
-        color: var(--color-fg-muted);
-        border-left: .25em solid var(--color-border-default);
+        color: var(--fgColor-muted);
+        border-left: .25em solid var(--borderColor-default);
       }
 
       .markdown-body ul,
@@ -479,14 +492,14 @@
       .markdown-body tt,
       .markdown-body code,
       .markdown-body samp {
-        font-family: ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;
+        font-family: var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);
         font-size: 12px;
       }
 
       .markdown-body pre {
         margin-top: 0;
         margin-bottom: 0;
-        font-family: ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;
+        font-family: var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);
         font-size: 12px;
         word-wrap: normal;
       }
@@ -534,7 +547,7 @@
       }
 
       .markdown-body .absent {
-        color: var(--color-danger-fg);
+        color: var(--fgColor-danger);
       }
 
       .markdown-body .anchor {
@@ -574,7 +587,7 @@
       .markdown-body h4 .octicon-link,
       .markdown-body h5 .octicon-link,
       .markdown-body h6 .octicon-link {
-        color: var(--color-fg-default);
+        color: var(--fgColor-default);
         vertical-align: middle;
         visibility: hidden;
       }
@@ -707,7 +720,7 @@
       .markdown-body table th,
       .markdown-body table td {
         padding: 6px 13px;
-        border: 1px solid var(--color-border-default);
+        border: 1px solid var(--borderColor-default);
       }
 
       .markdown-body table td>:last-child {
@@ -715,12 +728,12 @@
       }
 
       .markdown-body table tr {
-        background-color: var(--color-canvas-default);
-        border-top: 1px solid var(--color-border-muted);
+        background-color: var(--bgColor-default);
+        border-top: 1px solid var(--borderColor-muted);
       }
 
       .markdown-body table tr:nth-child(2n) {
-        background-color: var(--color-canvas-subtle);
+        background-color: var(--bgColor-muted);
       }
 
       .markdown-body table img {
@@ -753,7 +766,7 @@
         padding: 7px;
         margin: 13px 0 0;
         overflow: hidden;
-        border: 1px solid var(--color-border-default);
+        border: 1px solid var(--borderColor-default);
       }
 
       .markdown-body span.frame span img {
@@ -765,7 +778,7 @@
         display: block;
         padding: 5px 0 0;
         clear: both;
-        color: var(--color-fg-default);
+        color: var(--fgColor-default);
       }
 
       .markdown-body span.align-center {
@@ -835,7 +848,7 @@
         margin: 0;
         font-size: 85%;
         white-space: break-spaces;
-        background-color: var(--color-neutral-muted);
+        background-color: var(--bgColor-neutral-muted);
         border-radius: 6px;
       }
 
@@ -880,8 +893,8 @@
         overflow: auto;
         font-size: 85%;
         line-height: 1.45;
-        color: var(--color-fg-default);
-        background-color: var(--color-canvas-subtle);
+        color: var(--fgColor-default);
+        background-color: var(--bgColor-muted);
         border-radius: 6px;
       }
 
@@ -911,7 +924,7 @@
       .markdown-body .csv-data .blob-num {
         padding: 10px 8px 9px;
         text-align: right;
-        background: var(--color-canvas-default);
+        background: var(--bgColor-default);
         border: 0;
       }
 
@@ -921,7 +934,7 @@
 
       .markdown-body .csv-data th {
         font-weight: var(--base-text-weight-semibold, 600);
-        background: var(--color-canvas-subtle);
+        background: var(--bgColor-muted);
         border-top: 0;
       }
 
@@ -935,8 +948,8 @@
 
       .markdown-body .footnotes {
         font-size: 12px;
-        color: var(--color-fg-muted);
-        border-top: 1px solid var(--color-border-default);
+        color: var(--fgColor-muted);
+        border-top: 1px solid var(--borderColor-default);
       }
 
       .markdown-body .footnotes ol {
@@ -961,12 +974,12 @@
         left: -24px;
         pointer-events: none;
         content: "";
-        border: 2px solid var(--color-accent-emphasis);
+        border: 2px solid var(--borderColor-accent-emphasis);
         border-radius: 6px;
       }
 
       .markdown-body .footnotes li:target {
-        color: var(--color-fg-default);
+        color: var(--fgColor-default);
       }
 
       .markdown-body .footnotes .data-footnote-backref g-emoji {
@@ -1093,6 +1106,20 @@
         color: var(--color-prettylights-syntax-constant-other-reference-link);
       }
 
+      .markdown-body [role=button]:focus:not(:focus-visible),
+      .markdown-body [role=tabpanel][tabindex="0"]:focus:not(:focus-visible),
+      .markdown-body button:focus:not(:focus-visible),
+      .markdown-body summary:focus:not(:focus-visible),
+      .markdown-body a:focus:not(:focus-visible) {
+        outline: none;
+        box-shadow: none;
+      }
+
+      .markdown-body [tabindex="0"]:focus:not(:focus-visible),
+      .markdown-body details-dialog:focus:not(:focus-visible) {
+        outline: none;
+      }
+
       .markdown-body g-emoji {
         display: inline-block;
         min-width: 1ch;
@@ -1122,7 +1149,7 @@
       }
 
       .markdown-body .task-list-item+.task-list-item {
-        margin-top: 4px;
+        margin-top: var(--base-size-4);
       }
 
       .markdown-body .task-list-item .handle {
@@ -1157,9 +1184,9 @@
 
       .markdown-body .markdown-alert {
         padding: var(--base-size-8) var(--base-size-16);
-        margin-bottom: 16px;
+        margin-bottom: var(--base-size-16);
         color: inherit;
-        border-left: .25em solid var(--color-border-default);
+        border-left: .25em solid var(--borderColor-default);
       }
 
       .markdown-body .markdown-alert>:first-child {
@@ -1178,43 +1205,47 @@
       }
 
       .markdown-body .markdown-alert.markdown-alert-note {
-        border-left-color: var(--color-accent-emphasis);
+        border-left-color: var(--borderColor-accent-emphasis);
       }
 
       .markdown-body .markdown-alert.markdown-alert-note .markdown-alert-title {
-        color: var(--color-accent-fg);
+        color: var(--fgColor-accent);
       }
 
       .markdown-body .markdown-alert.markdown-alert-important {
-        border-left-color: var(--color-done-emphasis);
+        border-left-color: var(--borderColor-done-emphasis);
       }
 
       .markdown-body .markdown-alert.markdown-alert-important .markdown-alert-title {
-        color: var(--color-done-fg);
+        color: var(--fgColor-done);
       }
 
       .markdown-body .markdown-alert.markdown-alert-warning {
-        border-left-color: var(--color-attention-emphasis);
+        border-left-color: var(--borderColor-attention-emphasis);
       }
 
       .markdown-body .markdown-alert.markdown-alert-warning .markdown-alert-title {
-        color: var(--color-attention-fg);
+        color: var(--fgColor-attention);
       }
 
       .markdown-body .markdown-alert.markdown-alert-tip {
-        border-left-color: var(--color-success-emphasis);
+        border-left-color: var(--borderColor-success-emphasis);
       }
 
       .markdown-body .markdown-alert.markdown-alert-tip .markdown-alert-title {
-        color: var(--color-success-fg);
+        color: var(--fgColor-success);
       }
 
       .markdown-body .markdown-alert.markdown-alert-caution {
-        border-left-color: var(--color-danger-emphasis);
+        border-left-color: var(--borderColor-danger-emphasis);
       }
 
       .markdown-body .markdown-alert.markdown-alert-caution .markdown-alert-title {
-        color: var(--color-danger-fg);
+        color: var(--fgColor-danger);
+      }
+
+      .markdown-body>*:first-child>.heading-element:first-child {
+        margin-top: 0 !important;
       }
     </style>
   </head>