diff --git a/.eleventy.js b/.eleventy.js
index 04ab4b0..924829d 100644
--- a/.eleventy.js
+++ b/.eleventy.js
@@ -5,6 +5,8 @@ const pluginNavigation = require("@11ty/eleventy-navigation");
 module.exports = function(eleventyConfig) {
   eleventyConfig.addPlugin(pluginNavigation);
 
+  eleventyConfig.addPassthroughCopy("css");
+
   eleventyConfig.addFilter("readableDate", dateObj => {
     return DateTime.fromJSDate(dateObj, {zone: 'utc'}).setLocale("fr").toFormat("dd LLL yyyy");
   });
diff --git a/_includes/layouts/base.njk b/_includes/layouts/base.njk
index 8ea038b..210b482 100644
--- a/_includes/layouts/base.njk
+++ b/_includes/layouts/base.njk
@@ -8,8 +8,6 @@
     <meta name="generator" content="{{ eleventy.generator }}">
 
     <link rel="stylesheet" href="{{ '/css/index.css' | url }}">
-    <link rel="stylesheet" href="{{ '/css/prism-base16-monokai.dark.css' | url }}">
-    <link rel="stylesheet" href="{{ '/css/prism-diff.css' | url }}">
     <link rel="alternate" href="{{ metadata.feed.path | url }}" type="application/atom+xml" title="{{ metadata.title }}">
     <link rel="alternate" href="{{ metadata.jsonfeed.path | url }}" type="application/json" title="{{ metadata.title }}">
   </head>
diff --git a/css/index.css b/css/index.css
new file mode 100644
index 0000000..25c9c82
--- /dev/null
+++ b/css/index.css
@@ -0,0 +1,219 @@
+/* Colors */
+:root {
+  --lightgray: #e0e0e0;
+  --gray: #C0C0C0;
+  --darkgray: #333;
+  --navy: #17050F;
+  --blue: #082840;
+  --white: #fff;
+}
+
+/* Global stylesheet */
+* {
+  box-sizing: border-box;
+}
+
+html,
+body {
+  padding: 0;
+  margin: 0;
+  font-family: -apple-system, system-ui, sans-serif;
+  color: var(--darkgray);
+  background-color: var(--white);
+}
+p:last-child {
+  margin-bottom: 0;
+}
+p,
+.tmpl-post li,
+img {
+  max-width: 37.5em; /* 600px /16 */
+}
+p,
+.tmpl-post li {
+  line-height: 1.45;
+}
+a[href] {
+  color: var(--blue);
+}
+a[href]:visited {
+  color: var(--navy);
+}
+main {
+  padding: 1rem;
+}
+main :first-child {
+  margin-top: 0;
+}
+header {
+  border-bottom: 1px dashed var(--lightgray);
+}
+header:after {
+  content: "";
+  display: table;
+  clear: both;
+}
+table {
+  margin: 1em 0;
+}
+table td,
+table th {
+  padding-right: 1em;
+}
+
+pre,
+code {
+  font-family: Consolas, Menlo, Monaco, "Andale Mono WT", "Andale Mono", "Lucida Console", "Lucida Sans Typewriter", "DejaVu Sans Mono", "Bitstream Vera Sans Mono", "Liberation Mono", "Nimbus Mono L", "Courier New", Courier, monospace;
+  line-height: 1.5;
+}
+pre {
+  font-size: 14px;
+  line-height: 1.375;
+  direction: ltr;
+  text-align: left;
+  white-space: pre;
+  word-spacing: normal;
+  word-break: normal;
+  -moz-tab-size: 2;
+  -o-tab-size: 2;
+  tab-size: 2;
+  -webkit-hyphens: none;
+  -moz-hyphens: none;
+  -ms-hyphens: none;
+  hyphens: none;
+  padding: 1em;
+  margin: .5em 0;
+  background-color: #f6f6f6;
+}
+code {
+  word-break: break-all;
+}
+
+/* Header */
+.home {
+  padding: 0 1rem;
+  float: left;
+  margin: 1rem 0; /* 16px /16 */
+  font-size: 1em; /* 16px /16 */
+}
+.home :link:not(:hover) {
+  text-decoration: none;
+}
+
+/* Nav */
+.nav {
+  padding: 0;
+  list-style: none;
+  float: left;
+  margin-left: 1em;
+}
+.nav-item {
+  display: inline-block;
+  margin-right: 1em;
+}
+.nav-item a[href]:not(:hover) {
+  text-decoration: none;
+}
+.nav-item-active {
+  font-weight: 700;
+  text-decoration: underline;
+}
+
+/* Posts list */
+.postlist {
+  list-style: none;
+  padding: 0;
+}
+.postlist-item {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: baseline;
+  counter-increment: start-from -1;
+  line-height: 1.8;
+}
+.postlist-item:before {
+  display: inline-block;
+  pointer-events: none;
+  content: "" counter(start-from, decimal-leading-zero) ". ";
+  line-height: 100%;
+  text-align: right;
+}
+.postlist-date,
+.postlist-item:before {
+  font-size: 0.8125em; /* 13px /16 */
+  color: var(--darkgray);
+}
+.postlist-date {
+  word-spacing: -0.5px;
+}
+.postlist-link {
+  padding-left: .25em;
+  padding-right: .25em;
+  text-underline-position: from-font;
+  text-underline-offset: 0;
+  text-decoration-thickness: 1px;
+}
+.postlist-item-active .postlist-link {
+  font-weight: bold;
+}
+.tmpl-home .postlist-link {
+  font-size: 1.1875em; /* 19px /16 */
+  font-weight: 700;
+}
+
+
+/* Tags */
+.post-tag {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  text-transform: uppercase;
+  font-size: 0.75em; /* 12px /16 */
+  padding: 0.08333333333333em 0.3333333333333em; /* 1px 4px /12 */
+  margin-left: 0.6666666666667em; /* 8px /12 */
+  margin-top: 0.5em; /* 6px /12 */
+  margin-bottom: 0.5em; /* 6px /12 */
+  color: var(--darkgray);
+  border: 1px solid var(--gray);
+  border-radius: 0.25em; /* 3px /12 */
+  text-decoration: none;
+  line-height: 1.8;
+}
+a[href].post-tag,
+a[href].post-tag:visited {
+  color: inherit;
+}
+a[href].post-tag:hover,
+a[href].post-tag:focus {
+  background-color: var(--lightgray);
+}
+.postlist-item > .post-tag {
+  align-self: center;
+}
+
+/* Warning */
+.warning {
+  background-color: #ffc;
+  padding: 1em 0.625em; /* 16px 10px /16 */
+}
+.warning ol:only-child {
+  margin: 0;
+}
+
+/* Direct Links / Markdown Headers */
+.direct-link {
+  font-family: sans-serif;
+  text-decoration: none;
+  font-style: normal;
+  margin-left: .1em;
+}
+a[href].direct-link,
+a[href].direct-link:visited {
+  color: transparent;
+}
+a[href].direct-link:focus,
+a[href].direct-link:focus:visited,
+:hover > a[href].direct-link,
+:hover > a[href].direct-link:visited {
+  color: #aaa;
+}