Style paste component

[MAILPOET-1808]

assets/css/src/components/_importExport.scss

@@ -129,7 +129,7 @@ span {
     margin: 20px 0px;
   }
 
-  .import-selection-form {
+  .import_selection_form {
     display: flex;
     flex-direction: row;
     flex-wrap: nowrap;
@@ -138,4 +138,30 @@ span {
       margin-right: 2.5em;
     }
   }
+
+  .import_heading {
+    color: #23282d;
+    font-size: 14px;
+    font-weight: 600;
+    line-height: 1.3;
+  }
+
+  .description {
+    color: #666;
+    font-size: 13px;
+    font-style: italic;
+    font-weight: 600;
+    margin: 2px 0 5px;
+  }
+
+  .import_paste_texts {
+    margin-right: 25px;
+    width: 300px;
+  }
+
+  .import_method_paste {
+    display: flex;
+    flex-direction: row;
+    flex-wrap: nowrap;
+  }
 }

assets/js/src/subscribers/importExport/import/step_method_selection/method_paste.jsx

@@ -17,25 +17,27 @@ const MethodPaste = ({ setInputValid, setInputInvalid }) => {
   };
 
   return (
-    <div>
-      <label htmlFor="paste_input">
-        <span>{MailPoet.I18n.t('pasteLabel')}</span>
-        <p className="description">
-          {ReactStringReplace(
-            MailPoet.I18n.t('pasteDescription'),
-            /\[link\](.*?)\[\/link\]/,
-            match => (
-              <a
-                href={`${kbLink}`}
-                key="kb-link"
-                target="_blank"
-                rel="noopener noreferrer"
-              >
-                { match }
-              </a>
-            )
-          )}
-        </p>
+    <>
+      <label htmlFor="paste_input" className="import_method_paste">
+        <div className="import_paste_texts">
+          <span className="import_heading">{MailPoet.I18n.t('pasteLabel')}</span>
+          <p className="description">
+            {ReactStringReplace(
+              MailPoet.I18n.t('pasteDescription'),
+              /\[link\](.*?)\[\/link\]/,
+              match => (
+                <a
+                  href={`${kbLink}`}
+                  key="kb-link"
+                  target="_blank"
+                  rel="noopener noreferrer"
+                >
+                  { match }
+                </a>
+              )
+            )}
+          </p>
+        </div>
         <textarea
           id="paste_input"
           rows="15"
@@ -44,7 +46,7 @@ const MethodPaste = ({ setInputValid, setInputInvalid }) => {
           onChange={onChange}
         />
       </label>
-    </div>
+    </>
   );
 };
 

assets/js/src/subscribers/importExport/import/step_method_selection/select_import_method.jsx

@@ -9,7 +9,7 @@ function SelectImportMethod({
   onMethodChange,
 }) {
   const renderSelection = () => (
-    <form className="import-selection-form">
+    <form className="import_selection_form">
       <span>{MailPoet.I18n.t('methodSelectionHead')}</span>
       <label htmlFor="import-paste-method">
         <input