diff --git a/static/css/404.css b/static/css/404.css
new file mode 100644
index 0000000..5922034
--- /dev/null
+++ b/static/css/404.css
@@ -0,0 +1,28 @@
+.not-found ul.menu li {
+	width: 100%;
+}
+
+.not-found a.logo {
+	width: 100%;
+	padding: 20px 0;
+	background-color: var(--alt-bg);
+	text-align: center;
+	pointer-events: none;
+}
+
+h1.not-found-num {
+	text-align: center;
+	font-size: 72px;
+	margin-top: 0;
+}
+
+h1.not-found {
+	text-align: center;
+	margin-bottom: 0;
+}
+
+@media screen and (min-width: 1040px) {
+	.content {
+		margin: 5em 5% auto 5%;
+	}
+}
diff --git a/static/css/colorschemes/404.css b/static/css/colorschemes/404.css
new file mode 100644
index 0000000..f324d20
--- /dev/null
+++ b/static/css/colorschemes/404.css
@@ -0,0 +1,21 @@
+.not-found ul.menu li {
+	width: 100%;
+}
+
+.not-found a.logo {
+	width: 100%;
+	background-color: var(--alt-bg);
+	text-align: center;
+	pointer-events: none;
+}
+
+h1.not-found-num {
+	text-align: center;
+	font-size: 72px;
+	margin-top: 0;
+}
+
+h1.not-found {
+	text-align: center;
+	margin-bottom: 0;
+}