Read HTML from a file instead of .tmpl

static/style.css

@@ -1,57 +0,0 @@
-html {
-  max-width: 70ch;
-  padding: calc(1vmin + 0.5rem);
-  margin-inline: auto;
-  font-size: clamp(1em, 0.909em + 0.45vmin, 1.25em);
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
-    Arial, sans-serif;
-  color-scheme: light dark;
-}
-
-h1 {
-  font-size: 2.5rem;
-  font-weight: 600;
-  margin: 0;
-}
-
-.title {
-  text-align: center;
-}
-
-.search {
-  display: flex;
-  justify-content: center;
-  margin-top: 1rem;
-  margin-inline: auto;
-}
-
-.leftright {
-  display: flex;
-  justify-content: center;
-}
-
-.left {
-  margin-right: auto;
-}
-
-.right {
-  margin-left: auto;
-}
-
-textarea {
-  width: 100%;
-  height: 10rem;
-  resize: vertical;
-}
-
-.messages {
-  list-style-type: none;
-}
-
-.error {
-  color: red;
-}
-
-.success {
-  color: green;
-}