fix: improve WCAG compliance and mobile editor height

- Add aria-describedby to password inputs for screen readers
- Connect hint text to input via id reference
- Increase mobile editor min-height to 50vh

lessons/22-html-forms-validation.json

@@ -38,8 +38,8 @@
 			"previewHTML": "",
 			"previewBaseCSS": "body { font-family: system-ui; padding: 20px; } form { max-width: 350px; } label { display: block; margin-bottom: 5px; } input { width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } input:invalid:not(:placeholder-shown) { border-color: #d32f2f; } small { display: block; font-size: 12px; color: #666; margin-top: 4px; } button { margin-top: 20px; padding: 10px 20px; background: #1976d2; color: white; border: none; border-radius: 4px; cursor: pointer; }",
 			"sandboxCSS": "",
-			"initialCode": "<form>\n  <label for=\"password\">Password:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required>\n  <small>Must be 8-20 characters</small>\n  \n  <button type=\"submit\">Create Account</button>\n</form>",
+			"initialCode": "<form>\n  <label for=\"password\">Password:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required aria-describedby=\"password-hint\">\n  <small id=\"password-hint\">Must be 8-20 characters</small>\n  \n  <button type=\"submit\">Create Account</button>\n</form>",
-			"solution": "<form>\n  <label for=\"password\">Password:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required minlength=\"8\" maxlength=\"20\" placeholder=\"Enter password\">\n  <small>Must be 8-20 characters</small>\n  \n  <button type=\"submit\">Create Account</button>\n</form>",
+			"solution": "<form>\n  <label for=\"password\">Password:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required minlength=\"8\" maxlength=\"20\" placeholder=\"Enter password\" aria-describedby=\"password-hint\">\n  <small id=\"password-hint\">Must be 8-20 characters</small>\n  \n  <button type=\"submit\">Create Account</button>\n</form>",
 			"previewContainer": "preview-area",
 			"validations": [
 				{

lessons/de/22-html-forms-validation.json

@@ -38,8 +38,8 @@
 			"previewHTML": "",
 			"previewBaseCSS": "body { font-family: system-ui; padding: 20px; } form { max-width: 350px; } label { display: block; margin-bottom: 5px; } input { width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box; } input:invalid:not(:placeholder-shown) { border-color: #d32f2f; } small { display: block; font-size: 12px; color: #666; margin-top: 4px; } button { margin-top: 20px; padding: 10px 20px; background: #1976d2; color: white; border: none; border-radius: 4px; cursor: pointer; }",
 			"sandboxCSS": "",
-			"initialCode": "<form>\n  <label for=\"password\">Passwort:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required>\n  <small>Muss 8-20 Zeichen lang sein</small>\n  \n  <button type=\"submit\">Konto erstellen</button>\n</form>",
+			"initialCode": "<form>\n  <label for=\"password\">Passwort:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required aria-describedby=\"password-hint\">\n  <small id=\"password-hint\">Muss 8-20 Zeichen lang sein</small>\n  \n  <button type=\"submit\">Konto erstellen</button>\n</form>",
-			"solution": "<form>\n  <label for=\"password\">Passwort:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required minlength=\"8\" maxlength=\"20\" placeholder=\"Passwort eingeben\">\n  <small>Muss 8-20 Zeichen lang sein</small>\n  \n  <button type=\"submit\">Konto erstellen</button>\n</form>",
+			"solution": "<form>\n  <label for=\"password\">Passwort:</label>\n  <input type=\"password\" id=\"password\" name=\"password\" required minlength=\"8\" maxlength=\"20\" placeholder=\"Passwort eingeben\" aria-describedby=\"password-hint\">\n  <small id=\"password-hint\">Muss 8-20 Zeichen lang sein</small>\n  \n  <button type=\"submit\">Konto erstellen</button>\n</form>",
 			"previewContainer": "preview-area",
 			"validations": [
 				{

src/main.css

@@ -989,11 +989,11 @@ input:checked + .toggle-slider::before {
 	}
 
 	.editor-section {
-		min-height: 200px;
+		min-height: 50vh;
 	}
 
 	.editor-content {
-		min-height: 150px;
+		min-height: 40vh;
 	}
 
 	.preview-wrapper {