diff --git a/docs/en/SUMMARY.md b/docs/en/SUMMARY.md
index 042fa553f..bf09a80fa 100644
--- a/docs/en/SUMMARY.md
+++ b/docs/en/SUMMARY.md
@@ -22,6 +22,8 @@
 * [Templating](customization/templating.md)
 * [Texts & Translations](customization/translations.md)
 * [Images](customization/images.md)
+* [Views & Styles](customization/views_and_styles.md)
+* [Javascript](customization/javascript.md)
 * [Overwritting](customization/overwritting.md)
 * [Adding new features](customization/new_features.md)
 
diff --git a/docs/en/customization/javascript.md b/docs/en/customization/javascript.md
new file mode 100644
index 000000000..76b743fe9
--- /dev/null
+++ b/docs/en/customization/javascript.md
@@ -0,0 +1,15 @@
+# Javascript
+
+If you want to add some custom Javascript code, `app/assets/javascripts/custom.js` is the file to do it. For example to create a new alert just add:
+
+```js
+$(function(){
+  alert('foobar');
+});
+```
+
+If you work with Coffeescript code you can check it with [coffeelint](http://www.coffeelint.org/) (install with `npm install -g coffeelint`) :
+
+```bash
+coffeelint .
+```
diff --git a/docs/en/customization/views_and_styles.md b/docs/en/customization/views_and_styles.md
new file mode 100644
index 000000000..911bbf088
--- /dev/null
+++ b/docs/en/customization/views_and_styles.md
@@ -0,0 +1,31 @@
+# Views (HTML)
+
+If you want to change any page HTML  you can just find the correct file under the `app/views` folder and put a copy at `app/views/custom` keeping as well any sub-folder structure, and then apply your customizations. For example if you want to customize `app/views/pages/conditions.html` you'll have to make a copy at `app/views/custom/pages/conditions.html.erb` (note the `pages` subdirectory).
+
+# CSS Styles with SASS
+
+In order to make changes to any CSS selector (custom style sheets), you can add them directly at `app/assets/stylesheets/custom.scss`. For example to change the header color (`.top-links`) you can just add:
+
+```css
+.top-links {
+  background: red;
+}
+```
+
+If you want to change any [foundation](http://foundation.zurb.com/) variable, you can do it at the `app/assets/stylesheets/_custom_settings.scss` file. For example to change the main application color just add:
+
+```css
+$brand:             #446336;
+```
+
+We use [SASS, with SCSS syntax](http://sass-lang.com/guide) as CSS preprocessor.
+
+Also you can check your scss files syntax with
+
+```bash
+scss-lint
+```
+
+## Accesibility
+
+To maintain accesibility level, if you add new colors use a [Color contrast checker](http://webaim.org/resources/contrastchecker/) (WCAG AA is mandatory, WCAG AAA is recommended)
diff --git a/docs/es/SUMMARY.md b/docs/es/SUMMARY.md
index 0a026571d..b68deaaaa 100644
--- a/docs/es/SUMMARY.md
+++ b/docs/es/SUMMARY.md
@@ -22,6 +22,8 @@
 * [Interfaz y diseño](customization/templating.md)
 * [Textos & Traducciones](customization/translations.md)
 * [Imágenes](customization/images.md)
+* [Vistas & Estilos](customization/views_and_styles.md)
+* [Javascript](customization/javascript.md)
 * [Adaptar la aplicación](customization/overwritting.md)
 * [Añadir nuevas funcionalidades](customization/new_features.md)
 
diff --git a/docs/es/customization/javascript.md b/docs/es/customization/javascript.md
new file mode 100644
index 000000000..461224caa
--- /dev/null
+++ b/docs/es/customization/javascript.md
@@ -0,0 +1,15 @@
+# Javascript
+
+Si quieres agregar código Javascript puedes hacerlo en el fichero `app/assets/javascripts/custom.js`. Por ejemplo si quieres que salga una alerta puedes poner lo siguiente:
+
+```js
+$(function(){
+  alert('foobar');
+});
+```
+
+Si trabajas con código coffeescript puedes revisarlo con [coffeelint](http://www.coffeelint.org/) (instalalo con `npm install -g coffeelint`) :
+
+```bash
+coffeelint .
+```
diff --git a/docs/es/customization/views_and_styles.md b/docs/es/customization/views_and_styles.md
new file mode 100644
index 000000000..210bd2a58
--- /dev/null
+++ b/docs/es/customization/views_and_styles.md
@@ -0,0 +1,31 @@
+# Vistas (HTML)
+
+Si quieres modificar el HTML de alguna página puedes hacerlo copiando el HTML de `app/views` y poniendolo en `app/views/custom` respetando los subdirectorios que encuentres ahí. Por ejemplo si quieres modificar `app/views/pages/conditions.html` debes copiarlo y modificarla en `app/views/custom/pages/conditions.html.erb`
+
+# Estilos CSS con SASS
+
+Si quieres cambiar algun selector CSS (de las hojas de estilo) puedes hacerlo en el fichero `app/assets/stylesheets/custom.scss`. Por ejemplo si quieres cambiar el color del header (`.top-links`) puedes hacerlo agregando:
+
+```css
+.top-links {
+  background: red;
+}
+```
+
+Si quieres cambiar alguna variable de [foundation](http://foundation.zurb.com/) puedes hacerlo en el fichero `app/assets/stylesheets/_custom_settings.scss`. Por ejemplo para cambiar el color general de la aplicación puedes hacerlo agregando:
+
+```css
+$brand:             #446336;
+```
+
+Usamos un preprocesador de CSS, [SASS, con la sintaxis SCSS](http://sass-lang.com/guide).
+
+Además puedes comprobar la sintaxis de tus ficheros scss con:
+
+```bash
+scss-lint
+```
+
+## Accesibilidad
+
+Para mantener el nivel de accesibilidad, si añades colores nuevos utiliza un [Comprobador de contraste de color](http://webaim.org/resources/contrastchecker/) (WCAG AA es obligatorio, WCAG AAA es recomendable)