CSS improvements

app.py

@@ -207,6 +207,26 @@ HTML_FORM = '''
       font-size: 1.3em !important;
       padding: 0.9em 2.2em;
     }
+    input[type=file] {
+      font-size: 1.16em !important;
+    }
+
+  input[type=file]::file-selector-button {
+    background: linear-gradient(90deg, #8ee3c1, #35a7ff);
+    color: #222;
+    font-weight: bold;
+    border: none;
+    padding: 0.5em 1.2em;
+    border-radius: 0.7em;
+    box-shadow: 0 2px 12px #1116;
+    cursor: pointer;
+    transition: filter 0.2s, box-shadow 0.2s;
+    margin-right: 0.5em;
+  }
+
+  input[type=file]::file-selector-button:hover {
+    filter: brightness(1.12);
+    box-shadow: 0 4px 18px #2229;
   }
 
   .print-frame {
@@ -246,6 +266,11 @@ HTML_FORM = '''
     position: relative;
     z-index: 2;
   }
+  textarea {
+      font-size: 1.16em !important;
+      padding: 1em;
+      min-height: 12em;
+    }
 
 </style>
 <div class="centered-flex">