style: improve docs links, toc and icons (#1516)

Last polish docs website design by:

- Limiting ToC height and allowing scroll inside (cf #1513)
- Replacing external icon
- Adding the full logo
- Improving the caret icon
- Fixing Toc hover color on dark mode

---------

Co-authored-by: Morgan <git@howl.moe>

misc/docusaurus/docusaurus.config.js

@@ -45,11 +45,10 @@ const config = {
     ({
       navbar: {
         hideOnScroll: true,
-        title: "Gno.land",
         logo: {
           alt: "Gno.land Logo",
-          src: "img/logo.svg",
-          srcDark: "img/logo_light.svg",
+          src: "img/gnoland.svg",
+          srcDark: "img/gnoland_light.svg",
         },
         items: [
           {

misc/docusaurus/src/css/custom.css

@@ -36,12 +36,14 @@
   --ifm-color-secondary: var(--ifm-color-primary-light);
   --ifm-color-white: var(--ifm-color-primary);
 
+  --ifm-menu-link-sublist-icon: url("data:image/svg+xml;base64,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");
   --content-max-w: 50rem;
 }
 
 /* For readability concerns, you should choose a lighter palette in dark mode. */
 [data-theme="dark"]:root {
   --ifm-color-primary: white;
+  --ifm-color-content-secondary: #a8a8a8;
   --ifm-color-primary-dark: #282828;
   --ifm-color-primary-darker: #1c1c1c;
   --ifm-color-primary-light: #a8a8a8;
@@ -224,6 +226,10 @@ pre code {
   color: var(--ifm-color-primary);
 }
 
+.menu__link--sublist-caret:after {
+  background: var(--ifm-menu-link-sublist-icon) 50% / 1.28rem 1.28rem;
+}
+
 /* Breadcrumb */
 .breadcrumbs__item--active .breadcrumbs__link {
   background-color: var(--ifm-navbar-background-color);
@@ -235,10 +241,38 @@ pre code {
   overflow-y: inherit !important;
 }
 .table-of-contents {
+  position: relative;
   background-color: var(--ifm-toc-background-color);
   border-radius: 1rem;
   border: none !important;
   box-shadow: var(--ring-offset-shadow, 0 0 #0000), var(--ring-shadow, 0 0 #0000), var(--shadow);
+  max-height: calc(100vh - 10rem);
+  overflow: scroll;
+  -ms-overflow-style: none; /* IE and Edge */
+  scrollbar-width: none; /* Firefox */
+}
+.table-of-contents::-webkit-scrollbar {
+  display: none;
+}
+
+.theme-doc-toc-desktop::after {
+  content: "";
+  position: absolute;
+  bottom: 0;
+  left: 0;
+  width: 100%;
+  height: 2.5ch;
+  border-radius: 1rem;
+  background: linear-gradient(0deg, var(--ifm-toc-background-color) 0%, transparent);
+  pointer-events: none;
+}
+
+.table-of-contents__link:hover,
+.table-of-contents__link:hover code,
+.table-of-contents__link--active,
+.table-of-contents__link--active code {
+  color: var(--ifm-color-primary);
+  text-decoration: none;
 }
 
 /* Footer */
@@ -249,6 +283,18 @@ pre code {
   padding-inline: 0.5rem;
 }
 
+a.footer__link-item:after {
+  content: "↗";
+  font-size: 0.9em;
+  display: inline-block;
+  vertical-align: top;
+  padding-inline-start: 0.2em;
+  padding-block-start: 0.2;
+}
+a.footer__link-item > svg {
+  display: none;
+}
+
 .footer .container {
   max-width: 100%;
 }