diff --git a/lib/resources/styles.css b/lib/resources/styles.css
index 039525502a..ed667c9184 100644
--- a/lib/resources/styles.css
+++ b/lib/resources/styles.css
@@ -1,1321 +1 @@
-@charset "UTF-8";
-.light-theme {
-  /*background-color body, listdropdown*/
-  --main-bg-color: #fff;
-  /*header id-tittle*/
-  --main-header-color: #eeeeee;
-  /*package-name*/
-  --main-sidebar-color: #727272;
-  /*section-title and section subtitle, desc markdown(body, dd, h3), header a*/
-  --main-text-color: #111111;
-  /*typehead search-box*/
-  --main-search-bar: #fff;
-  /* scrollbar-thumb */
-  --main-scrollbar-color: #CCC;
-  /* footer */
-  --main-footer-background: #111111;
-  /*header text color*/
-  --main-h-text: black;
-  /* hyperlinks*/
-  --main-hyperlinks-color: #0175C2;
-  /*search background*/
-  --main-search-background: transparent;
-  /*code snippets*/
-  --main-code-bg: #f8f8f8;
-  --main-keyword-color: #333;
-  --main-tag-color: #000080;
-  --main-section-color: #900;
-  --main-comment-color: #998;
-  --main-var-color: #008080;
-  --main-string-color: #d14;
-  --main-number-filter: invert(0%);
-  --main-icon-color: black;
-  /* alerts */
-  --alert-info: #e7f8ff;
-  --alert-tip: #ecfaf7;
-  --alert-important: #e2dbff;
-  --alert-warning: #fcf8e3;
-  --alert-error: #fde9ee;
-}
-
-.dark-theme {
-  /*background-color body, listdropdown*/
-  --main-bg-color: #10161E;
-  /*header id-tittle*/
-  --main-header-color: #1C2834;
-  /*package-name*/
-  --main-sidebar-color: #fff;
-  /*section-title and section subtitle, desc markdown(body, dd, h3), header a*/
-  --main-text-color: #fff;
-  /*typehead search-box*/
-  --main-search-bar: #454545;
-  /* scrollbar-thumb */
-  --main-scrollbar-color: #5f6368;
-  /* footer */
-  --main-footer-background: #27323a;
-  /* hyperlinks*/
-  --main-hyperlinks-color: #00D2FA;
-  /*search background*/
-  --main-search-background: black;
-  /*code snippets*/
-  --main-code-bg: #10161E;
-  --main-keyword-color: white;
-  --main-tag-color: #00D2FA;
-  --main-section-color: #FF2D64;
-  --main-comment-color: #909CC3;
-  --main-var-color: #55A09B;
-  --main-string-color: #FF2D64;
-  --main-number-filter: invert(100%);
-  --main-icon-color: white;
-  /* alerts */
-  --alert-info: #043875;
-  --alert-tip: #065517;
-  --alert-important: #4a00b4;
-  --alert-warning: #7b6909;
-  --alert-error: #7a0c17;
-}
-
-#theme {
-  display: none;
-}
-
-#theme-button {
-  position: absolute;
-  right: 30px;
-  height: 24px;
-}
-
-#theme-button .material-symbols-outlined {
-  color: var(--main-icon-color);
-  user-select: none;
-  cursor: pointer;
-}
-
-#theme-button .material-symbols-outlined:hover {
-  color: var(--main-hyperlinks-color);
-}
-
-li .material-symbols-outlined, dt .material-symbols-outlined {
-  font-size: 1em;
-  vertical-align: text-bottom;
-}
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-dt .material-symbols-outlined {
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-}
-
-.light-theme #light-theme-button {
-  display: none;
-}
-
-.dark-theme #dark-theme-button {
-  display: none;
-}
-
-/*
-Only show images that fit their theme using GitHub's syntax, see:
-https://github.blog/changelog/2021-11-24-specify-theme-context-for-images-in-markdown/
-*/
-.dark-theme img[src$="#gh-light-mode-only"] {
-  display: none;
-}
-
-.light-theme img[src$="#gh-dark-mode-only"] {
-  display: none;
-}
-
-/* for layout */
-html,
-body {
-  margin: 0;
-  padding: 0;
-  height: 100%;
-  width: 100%;
-  overflow: hidden;
-  box-sizing: border-box;
-}
-
-*, *:before, *:after {
-  box-sizing: inherit;
-}
-
-body {
-  display: flex;
-  flex-direction: column;
-  -webkit-overflow-scrolling: touch;
-}
-
-header {
-  flex: 0 0 50px;
-  display: flex;
-  flex-direction: row;
-  align-items: center;
-  padding-left: 30px;
-  padding-right: 30px;
-  background-color: var(--main-header-color);
-}
-
-header ol {
-  list-style: none;
-  margin: 0;
-  padding: 0;
-}
-
-header ol li {
-  display: inline;
-}
-
-header form {
-  display: flex;
-  flex: 1;
-  justify-content: flex-end;
-}
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-header#header-search-sidebar {
-  height: 50px;
-  margin-bottom: 25px;
-}
-
-footer {
-  flex: 0 0 16px;
-  text-align: center;
-  padding: 16px 20px;
-}
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-  display: flex;
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-  order: 1;
-  overflow-y: scroll;
-  padding: 20px 0 15px 30px;
-  margin: 5px 20px 0 0;
-}
-
-::-webkit-scrollbar-button {
-  display: none;
-  height: 13px;
-  border-radius: 0;
-  background-color: #AAA;
-}
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-::-webkit-scrollbar-button:hover {
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-}
-
-::-webkit-scrollbar-thumb {
-  background-color: var(--main-scrollbar-color);
-}
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-::-webkit-scrollbar-thumb:hover {
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-  order: 2;
-  overflow-y: scroll;
-  padding: 10px 20px 0 20px;
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-.sidebar-offcanvas-right {
-  flex: 0 1 12em;
-  order: 3;
-  overflow-y: scroll;
-  padding: 20px 15px 15px 15px;
-  margin-top: 5px;
-  margin-right: 20px;
-}
-
-/* end for layout */
-body {
-  -webkit-text-size-adjust: 100%;
-  overflow-x: hidden;
-  font-family: Roboto, sans-serif;
-  font-size: 16px;
-  line-height: 1.42857143;
-  color: var(--main-text-color);
-  background-color: var(--main-bg-color);
-}
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-nav.navbar {
-  background-color: inherit;
-  min-height: 50px;
-  border: 0;
-}
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-@media (max-width: 840px) {
-  .hidden-xs {
-    display: none !important;
-  }
-}
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-  .hidden-l {
-    display: none !important;
-  }
-}
-nav.navbar .row {
-  padding-top: 8px;
-}
-
-nav .container {
-  white-space: nowrap;
-}
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-header {
-  background-color: var(--main-header-color);
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-}
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-.pre {
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-.hljs-string, .hljs-doctag {
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-.hljs-number, .hljs-literal, .hljs-variable, .hljs-template-variable, .hljs-tag .hljs-attr {
-  color: var(--main-var-color);
-}
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-.hljs-comment, .hljs-quote {
-  color: var(--main-comment-color);
-  font-style: italic;
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-.hljs-title, .hljs-section, .hljs-selector-id {
-  color: var(--main-section-color);
-  font-weight: bold;
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-.hljs-tag, .hljs-name, .hljs-attribute {
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-  font-weight: normal;
-}
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-.hljs-keyword, .hljs-selector-tag, .hljs-subst {
-  color: var(--main-keyword-color);
-  font-weight: bold;
-}
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-.hljs {
-  display: block;
-  overflow-x: auto;
-  padding: 0.5em;
-  color: var(--main-text-color);
-  background: var(--main-code-bg);
-}
-
-a {
-  text-decoration: none;
-}
-
-section {
-  /* Note that the generated HTML for pub packages may have `section` tags
-     transformed into `div` tags. */
-  margin-bottom: 36px;
-}
-
-dl {
-  margin: 0;
-}
-
-h1,
-h2,
-h3,
-h4,
-h5,
-h6 {
-  font-family: Roboto, sans-serif;
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-  margin-top: 1.5em;
-  color: var(--main-text-color);
-}
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-h1.title {
-  overflow: hidden;
-  text-overflow: ellipsis;
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-h1 {
-  font-size: 37px;
-  margin-top: 0;
-  margin-bottom: 0.67em;
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-h2 {
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-h5 {
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-p {
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-a {
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-a:hover {
-  color: #13B9FD;
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-pre.prettyprint {
-  font-family: "Roboto Mono", Menlo, monospace;
-  color: black;
-  border-radius: 0;
-  font-size: 15px;
-  word-wrap: normal;
-  line-height: 1.4;
-  border: 0;
-  margin: 16px 0 16px 0;
-  padding: 8px;
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-pre {
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-code {
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-  color: inherit;
-  padding: 0.2em 0.4em;
-  font-size: 85%;
-  background-color: rgba(27, 31, 35, 0.05);
-  border-radius: 3px;
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-@media (max-width: 840px) {
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-header a,
-header p,
-header li {
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-header a:hover {
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-header h1 .kind {
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-dt {
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-}
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-dd {
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-  margin-bottom: 1em;
-  margin-left: 0;
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-dd.callable, dd.constant, dd.property {
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-dd p {
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-  margin-bottom: 0;
-}
-
-/* Enum values do not have their own pages; their full docs are presented on the
- * enum class's page. */
-dt.constant + dd p {
-  margin-bottom: 1em;
-}
-
-/* indents wrapped lines */
-/* Note that the generated HTML for pub packages may have `section` tags
-   transformed into `div` tags, so we have two selectors here. */
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-  margin-left: 24px;
-  text-indent: -24px;
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-.dl-horizontal dd {
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-dl.dl-horizontal dt {
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-dt .name {
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-dl dt.callable .name {
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-.multi-line-signature .type-parameter .parameter {
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-.parameter-list.single-line > li > .parameter {
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-/* Colors for category based on categoryOrder in dartdoc_options.config. */
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-h1 .category {
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-/* Do not display "provided by X extension" text on extension pages. */
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-.from-extension > span {
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-  font-style: italic;
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-/* The badge under a declaration for things like "const", "read-only", etc. and for the badges inline like sealed or interface */
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-footer p {
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840px){#sidenav-left-toggle{display:inline;width:24px;height:24px;border:none;margin-right:24px;margin-left:24px;font-size:24px}#overlay-under-drawer.active{opacity:.4;height:100%;z-index:1999;position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000;display:block}.sidebar-offcanvas-left{left:-100%;position:fixed;-webkit-transition:all .25s ease-out;-o-transition:all .25s ease-out;transition:all .25s ease-out;z-index:2000;top:0;width:280px;height:90%;background-color:var(--main-bg-color);overflow-y:scroll;padding:10px;margin:10px 10px;box-shadow:5px 5px 5px 5px #444}ol#sidebar-nav{font-size:18px;white-space:pre-line}.sidebar-offcanvas-left.active{left:0}.self-name{display:inline-block;color:var(--main-hyperlinks-color)}}.sidebar-offcanvas-left h5{margin-bottom:10px}.sidebar-offcanvas-left h5:last-of-type{border:0;margin-bottom:25px}@media screen and (max-width: 992px){.sidebar-offcanvas-right{display:none}}#overlay-under-drawer{display:none}.form-control{border-radius:0;border:0}@media screen and (max-width: 840px){form.search{display:none}}.typeahead{width:200px;padding:2px 7px 1px 7px;line-height:20px;outline:none}.tt-wrapper{position:relative;display:inline-block}.tt-input{position:relative;vertical-align:top}.navbar-right .tt-menu{right:0;left:inherit !important;width:540px;max-height:280px;overflow-y:scroll}.navbar-right{padding-right:60px}.tt-menu{position:absolute;top:100%;left:0;z-index:100;font-size:14px;margin:0;background-color:var(--main-bg-color);border:1px solid var(--main-header-color);-webkit-box-shadow:0 5px 10px rgba(0,0,0,.2);-moz-box-shadow:0 5px 10px rgba(0,0,0,.2);box-shadow:0 5px 10px rgba(0,0,0,.2)}.typeahead{padding:17px 17px 17px 50px;width:422px;height:20px;font-size:13px;background-image:url("./search.svg");background-repeat:no-repeat;background-position:4%;outline:0;background-size:20px;filter:var(--main-number-filter);-webkit-filter:var(--main-number-filter)}.search-summary{margin-bottom:10px}a.tt-container{font-size:16px;color:var(--main-hyperlinks-color)}.enter-search-message{position:-webkit-sticky;position:sticky;top:0;background-color:#aaa;padding:0;font-size:14px;margin:0;clear:both;text-align:center;color:#000}.tt-suggestion:hover{cursor:pointer;color:#fff;background-color:#0097cf}.tt-suggestion:hover .search-from-lib{color:#ddd}.tt-suggestion.tt-cursor{color:#fff;background-color:#0097cf}.tt-suggestion.tt-cursor .search-from-lib{color:#ddd}.tt-suggestion p{margin:0}.tt-container{font-size:14px;margin-bottom:0;margin-top:15px}.tt-container-text{color:var(--main-text-color)}.tt-search-results .tt-container{margin-top:5px;margin-bottom:5px}.tt-search-results .tt-container-text{display:none}.tt-search-results .tt-suggestion{color:var(--main-text-color);margin-top:5px;overflow:hidden;padding-left:10px;padding-right:10px;text-overflow:ellipsis;white-space:nowrap}.tt-search-results .tt-suggestion-title{font-size:14px;padding-right:5px}.tt-search-results .tt-suggestion-container{color:var(--main-keyword-color);font-size:14px;font-style:italic;padding-right:5px}.tt-search-results .one-line-description{color:var(--main-keyword-color);display:inline;margin-left:0}.tt-search-results .one-line-description::before{content:open-quote}.tt-search-results .one-line-description::after{content:close-quote}#dartdoc-main-content .tt-suggestion{color:var(--main-text-color);margin-top:5px;margin-bottom:10px;border-style:solid;border-color:#d3d3d3;border-width:.5px}#dartdoc-main-content .tt-suggestion-title{display:block;font-weight:500;margin:4px 10px 0}#dartdoc-main-content .one-line-description{display:block;margin:2px 10px 3px}#dartdoc-main-content .tt-suggestion-container{display:none}@media screen and (max-width: 840px){.typeahead{padding:17px 17px 17px 33px;width:240px;height:17px;border:1px solid #f5f5f5;background-position:3%;margin:10px 10px 10px 9px}header{padding-left:0}}@media screen and (max-width: 320px){#sidenav-left-toggle{margin-right:10px;margin-left:20px}.self-name{margin-right:10px}}::placeholder{filter:brightness(0.85)}.search-body{border:1px solid #7f7f7f;max-width:400px;box-shadow:3px 3px 5px rgba(0,0,0,.1)}section#setter,div#setter{border-top:1px solid #ddd;padding-top:36px}li.inherited a{opacity:.65;font-style:italic}#instance-methods dt.inherited .name,#instance-properties dt.inherited .name,#operators dt.inherited .name{font-weight:400;font-style:italic}#instance-methods dt.inherited .signature,#instance-properties dt.inherited .signature,#operators dt.inherited .signature{font-weight:400}@media print{.subnav,.sidebar{display:none}a[href]:after{content:"" !important}}.markdown-alert{margin-top:1rem;margin-bottom:1rem;padding:1.25rem}.markdown-alert>:last-child{margin-bottom:0}.markdown-alert-title{display:flex;align-items:center;gap:.4rem;margin-bottom:.5rem;font-weight:bold;-webkit-font-smoothing:antialiased}.markdown-alert-title:before{font:24px/1 "Material Symbols Outlined"}.markdown-alert.markdown-alert-note{background-color:var(--alert-info)}.markdown-alert-note .markdown-alert-title:before{content:"info"}.markdown-alert.markdown-alert-tip{background-color:var(--alert-tip)}.markdown-alert-tip .markdown-alert-title:before{content:"lightbulb"}.markdown-alert.markdown-alert-important{background-color:var(--alert-important)}.markdown-alert-important .markdown-alert-title:before{content:"feedback"}.markdown-alert.markdown-alert-warning{background-color:var(--alert-warning)}.markdown-alert-warning .markdown-alert-title:before{content:"warning"}.markdown-alert.markdown-alert-caution{background-color:var(--alert-error)}.markdown-alert-caution .markdown-alert-title:before{content:"report"}
diff --git a/tool/task.dart b/tool/task.dart
index cfcc47850a..053ef14d1d 100644
--- a/tool/task.dart
+++ b/tool/task.dart
@@ -178,9 +178,11 @@ Future<void> buildWeb({bool debug = false}) async {
   ]);
   _delete(File('lib/resources/docs.dart.js.deps'));
 
-  final compileResult = sass.compileToResult('web/styles/styles.scss');
+  final compileResult = sass.compileToResult('web/styles/styles.scss',
+      style: debug ? sass.OutputStyle.expanded : sass.OutputStyle.compressed);
   if (compileResult.css.isNotEmpty) {
-    File('lib/resources/styles.css').writeAsStringSync(compileResult.css);
+    File('lib/resources/styles.css')
+        .writeAsStringSync('${compileResult.css}\n');
   } else {
     throw StateError('Compiled CSS was empty.');
   }