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feat: add dark mode support via prefers-color-scheme #676

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be4f660
feat: add dark mode support via prefers-color-scheme
alok Dec 16, 2025
ba2c0ea
style: apply prettier formatting to theme-toggle.js
alok Dec 17, 2025
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55 changes: 28 additions & 27 deletions src/verso-html/code.css
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,8 @@
body {
font-family: var(--verso-text-font-family);
line-height: 1.6;
color: #333;
color: var(--verso-text-color, #333);
background-color: var(--verso-background-color, #fff);
height: 100vh;
overflow: hidden;
}
Expand All @@ -29,8 +30,8 @@ body {
/* Sidebar */
.sidebar {
width: 300px;
background: #f8f9fa;
border-right: 1px solid #e9ecef;
background: var(--verso-surface-color, #f8f9fa);
border-right: 1px solid var(--verso-border-color, #e9ecef);
overflow-y: auto;
flex-shrink: 0;
}
Expand Down Expand Up @@ -73,11 +74,11 @@ body {
}

.module-tree summary:hover {
background-color: #e9ecef;
background-color: var(--verso-border-color, #e9ecef);
}

.module-tree summary a {
color: #0066cc;
color: var(--verso-link-color, #0066cc);
text-decoration: none;
}

Expand All @@ -86,12 +87,12 @@ body {
}

.module-tree summary.current {
background-color: #0066cc;
color: white;
background-color: var(--verso-link-color, #0066cc);
color: var(--verso-background-color, white);
}

.module-tree summary.current a {
color: white;
color: var(--verso-background-color, white);
}

.module-tree summary::before {
Expand All @@ -100,7 +101,7 @@ body {
left: -0.75rem;
transition: transform 0.2s ease;
font-size: 0.75rem;
color: #6c757d;
color: var(--verso-text-color-light, #6c757d);
}

.module-tree details[open] > summary::before {
Expand All @@ -114,7 +115,7 @@ body {
}

.module-tree .leaf a {
color: #0066cc;
color: var(--verso-link-color, #0066cc);
text-decoration: none;
}

Expand All @@ -123,12 +124,12 @@ body {
}

.module-tree .current {
background-color: #0066cc;
color: white;
background-color: var(--verso-link-color, #0066cc);
color: var(--verso-background-color, white);
}

.module-tree .current a {
color: white;
color: var(--verso-background-color, white);
}

/* Main content area */
Expand All @@ -141,8 +142,8 @@ body {

/* Title bar */
.title-bar {
background: #fff;
border-bottom: 1px solid #e9ecef;
background: var(--verso-background-color, #fff);
border-bottom: 1px solid var(--verso-border-color, #e9ecef);
padding: 1rem 1.5rem;
flex-shrink: 0;
position: relative;
Expand All @@ -165,26 +166,26 @@ body {
.breadcrumbs li:not(:last-child)::after {
content: "·";
margin: 0;
color: #6c757d;
color: var(--verso-text-color-light, #6c757d);
font-weight: bold;
}

.breadcrumbs a {
color: #0066cc;
color: var(--verso-link-color, #0066cc);
text-decoration: none;
padding: 0.25rem 0.5rem;
border-radius: 0.25rem;
transition: background-color 0.2s ease;
}

.breadcrumbs a:hover {
background-color: #e3f2fd;
background-color: var(--verso-selected-color, #e3f2fd);
text-decoration: underline;
}

.breadcrumbs .current {
font-weight: 600;
color: #495057;
color: var(--verso-text-color, #495057);
padding: 0.25rem 0.5rem;
border-radius: 0.25rem;
}
Expand All @@ -194,8 +195,8 @@ body {
flex: 1;
overflow-y: auto;
padding: 2rem;
background: #ffffff;
color: #24292e;
background: var(--verso-background-color, #ffffff);
color: var(--verso-text-color, #24292e);
font-family: "Monaco", "Menlo", "Ubuntu Mono", monospace;
font-size: 1rem;
}
Expand All @@ -206,7 +207,7 @@ body {
margin-left: calc(var(--indent, 0) * 1ch);
padding: 0.25rem 0.5rem;
max-width: 40em;
border: 1px solid #ddd;
border: 1px solid var(--verso-border-color-light, #ddd);
border-radius: 1rem;
width: max-content;
}
Expand Down Expand Up @@ -297,19 +298,19 @@ pre,
top: 1rem;
left: 1rem;
z-index: 1001;
background: #fff;
border: 1px solid #dee2e6;
background: var(--verso-background-color, #fff);
border: 1px solid var(--verso-border-color, #dee2e6);
border-radius: 0.375rem;
padding: 0.5rem;
cursor: pointer;
box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
box-shadow: 0 2px 4px var(--verso-shadow-color, rgba(0, 0, 0, 0.1));
}

.hamburger span {
display: block;
width: 20px;
height: 2px;
background: #333;
background: var(--verso-text-color, #333);
margin: 4px 0;
transition: 0.3s;
}
Expand All @@ -327,7 +328,7 @@ pre,
height: 100vh;
z-index: 1000;
transition: left 0.3s ease;
box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
box-shadow: 2px 0 10px var(--verso-shadow-color, rgba(0, 0, 0, 0.1));
}

.menu-toggle:checked + .hamburger + .layout .sidebar {
Expand Down
2 changes: 2 additions & 0 deletions src/verso-manual/VersoManual/Html.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -444,6 +444,7 @@ public def page
<link rel="stylesheet" href="-verso-search/search-box.css"/>
<link rel="stylesheet" href="-verso-search/search-highlight.css"/>
<link rel="stylesheet" href="-verso-search/domain-display.css"/>
<script src="theme-toggle.js"></script>
{{extraJsFiles.map fun f => ({{<script src=s!"{f.1}" {{if f.2 then defer else #[]}}></script>}})}}
{{extraStylesheets.map (fun url => {{<link rel="stylesheet" href={{url}}/> }})}}
{{extraCss.toArray.map ({{<style>{{Html.text false ·.css}}</style>}})}}
Expand All @@ -465,6 +466,7 @@ public def page
<div class="header-title-wrapper">
<a href={{if let some dest := logoLink then dest else "/"}} class="header-title"><h1>{{bookTitle}}</h1></a>
</div>
<button id="theme-toggle" type="button" aria-label="Toggle dark mode"></button>
</header>
<label for="toggle-toc" id="toggle-toc-click">
<span class="line line1"/>
Expand Down
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