some small refactoring

public/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /

public/style.css

@@ -0,0 +1,45 @@
+*,
+::before,
+::after {
+    box-sizing: border-box;
+}
+
+:root {
+    font-size: 16px;
+    line-height: 1;
+    font-weight: 400;
+
+    text-rendering: optimizeLegibility;
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+    -webkit-text-size-adjust: 100%;
+
+    font-family: system-ui;
+
+    background-color: #1e1e2e;
+    color: #cdd6f4;
+}
+
+body {
+    margin: 2rem;
+}
+
+button,
+input {
+    font-family: inherit;
+}
+
+.block {
+    max-width: 600px;
+    line-height: 1.3;
+    text-align: justify;
+}
+
+pre {
+    display: inline;
+    font-family: monospace;
+}
+
+a {
+    color: #89b4fa;
+}