Misc changes about form inputs.

frontend/src/design_system/button.scss

@@ -1,4 +1,4 @@
-button, a.button {
+button.cod-btn, a.cod-button {
     padding: .8em 1.2em;
     border-radius: 10em;
     border: none;
@@ -21,6 +21,6 @@ button, a.button {
     }
 }
 
-a.button {
+a.cod-button {
     text-decoration: none;
 }

frontend/src/design_system/form.scss

@@ -1,4 +1,17 @@
-form {
+form.cod-form {
+    &.card {
+        width: 80%;
+        max-width: 20em;
+        display: flex;
+        flex-direction: column;
+        justify-content: center;
+        gap: 1em;
+        box-shadow: 0 2px 5px 0 rgba(0,0,0,.16),0 2px 10px 0 rgba(0,0,0,.12);
+        border-radius: .5em;
+        padding: 1em 1.5em;
+        background-color: #ffffff;
+    }
+
     h1 {
         margin: 0;
     }

frontend/src/design_system/index.scss

@@ -1,2 +1,2 @@
 @use './button.scss';
-@use './input.scss';
+@use './form.scss';