chore: adjust articles styles

* change animation on article card hover
* change comments section alignment

12 files changed, 211 insertions, 113 deletions

diff --git a/src/components/atoms/buttons/buttons.module.scss b/src/components/atoms/buttons/buttons.module.scss
index 36c66b6..2444bb1 100644
--- a/src/components/atoms/buttons/buttons.module.scss
+++ b/src/components/atoms/buttons/buttons.module.scss
@@ -16,7 +16,7 @@
   }
 
   &--rectangle {
-    padding: var(--spacing-2xs) var(--spacing-md);
+    padding: var(--spacing-2xs) var(--spacing-sm);
   }
 
   &--square,
diff --git a/src/components/atoms/headings/heading.module.scss b/src/components/atoms/headings/heading.module.scss
index 8620f6f..a420bc1 100644
--- a/src/components/atoms/headings/heading.module.scss
+++ b/src/components/atoms/headings/heading.module.scss
@@ -6,11 +6,23 @@
   letter-spacing: 0.01ex;
 
   &--regular {
-    margin: 0;
+    margin-bottom: 0;
+    margin-top: 0;
+  }
+
+  &--left {
+    text-align: left;
+  }
+
+  &--center {
+    width: fit-content;
+    margin-left: auto;
+    margin-right: auto;
   }
 
   &--margin {
-    margin: 0 0 var(--spacing-sm);
+    margin-top: 0;
+    margin-bottom: var(--spacing-sm);
 
     & + & {
       margin-top: var(--spacing-md);
diff --git a/src/components/atoms/headings/heading.stories.tsx b/src/components/atoms/headings/heading.stories.tsx
index da5a718..0e3885d 100644
--- a/src/components/atoms/headings/heading.stories.tsx
+++ b/src/components/atoms/headings/heading.stories.tsx
@@ -8,10 +8,26 @@ export default {
   title: 'Atoms/Typography/Headings',
   component: Heading,
   args: {
+    alignment: 'left',
     isFake: false,
     withMargin: true,
   },
   argTypes: {
+    alignment: {
+      control: {
+        type: 'select',
+      },
+      description: 'The title alignment.',
+      options: ['center', 'left'],
+      table: {
+        category: 'Options',
+        defaultValue: { summary: 'left' },
+      },
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
     className: {
       control: {
         type: 'text',
@@ -32,6 +48,16 @@ export default {
         required: true,
       },
     },
+    id: {
+      control: {
+        type: 'text',
+      },
+      description: 'An unique id.',
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
     isFake: {
       control: {
         type: 'boolean',
diff --git a/src/components/atoms/headings/heading.tsx b/src/components/atoms/headings/heading.tsx
index c5bf4ca..e385249 100644
--- a/src/components/atoms/headings/heading.tsx
+++ b/src/components/atoms/headings/heading.tsx
@@ -1,10 +1,20 @@
-import { FC, ReactNode } from 'react';
+import {
+  createElement,
+  ForwardedRef,
+  forwardRef,
+  ForwardRefRenderFunction,
+  ReactNode,
+} from 'react';
 import styles from './heading.module.scss';
 
 export type HeadingLevel = 1 | 2 | 3 | 4 | 5 | 6;
 
 export type HeadingProps = {
   /**
+   * The title alignment. Default: left;
+   */
+  alignment?: 'center' | 'left';
+  /**
    * The heading body.
    */
   children: ReactNode;
@@ -30,31 +40,55 @@ export type HeadingProps = {
   withMargin?: boolean;
 };
 
+type TitleTagProps = Pick<HeadingProps, 'children' | 'className' | 'id'> & {
+  tagName: 'h1' | 'h2' | 'h3' | 'h4' | 'h5' | 'h6' | 'p';
+};
+
+const TitleTag = forwardRef<
+  HTMLHeadingElement | HTMLParagraphElement,
+  TitleTagProps
+>(
+  (
+    { children, tagName, ...props },
+    ref: ForwardedRef<HTMLHeadingElement | HTMLParagraphElement>
+  ) => {
+    return createElement(tagName, { ...props, ref }, children);
+  }
+);
+TitleTag.displayName = 'TitleTag';
+
 /**
  * Heading component.
  *
  * Render an HTML heading element or a paragraph with heading styles.
  */
-const Heading: FC<HeadingProps> = ({
-  children,
-  className,
-  id,
-  isFake = false,
-  level,
-  withMargin = true,
-}) => {
-  const TitleTag = isFake ? `p` : (`h${level}` as keyof JSX.IntrinsicElements);
+const Heading: ForwardRefRenderFunction<HTMLDivElement, HeadingProps> = (
+  {
+    alignment = 'left',
+    children,
+    className,
+    id,
+    isFake = false,
+    level,
+    withMargin = true,
+  },
+  ref: ForwardedRef<HTMLHeadingElement | HTMLParagraphElement>
+) => {
+  const tagName = isFake ? 'p' : (`h${level}` as TitleTagProps['tagName']);
   const levelClass = `heading--${level}`;
+  const alignmentClass = `heading--${alignment}`;
   const marginClass = withMargin ? 'heading--margin' : 'heading--regular';
 
   return (
     <TitleTag
-      className={`${styles.heading} ${styles[levelClass]} ${styles[marginClass]} ${className}`}
+      tagName={tagName}
+      className={`${styles.heading} ${styles[levelClass]} ${styles[alignmentClass]} ${styles[marginClass]} ${className}`}
       id={id}
+      ref={ref}
     >
       {children}
     </TitleTag>
   );
 };
 
-export default Heading;
+export default forwardRef(Heading);
diff --git a/src/components/molecules/buttons/heading-button.module.scss b/src/components/molecules/buttons/heading-button.module.scss
index 9c278e4..3c69221 100644
--- a/src/components/molecules/buttons/heading-button.module.scss
+++ b/src/components/molecules/buttons/heading-button.module.scss
@@ -20,6 +20,14 @@
   border-bottom: fun.convert-px(2) solid var(--color-primary-dark);
   cursor: pointer;
 
+  .heading {
+    padding: var(--spacing-2xs) 0;
+    background: none;
+    font-size: var(--font-size-xl);
+    font-weight: 500;
+    text-align: left;
+  }
+
   &:hover,
   &:focus {
     .icon {
@@ -34,10 +42,3 @@
     }
   }
 }
-
-.heading {
-  padding: var(--spacing-2xs) 0;
-  background: none;
-  font-size: var(--font-size-xl);
-  text-align: left;
-}
diff --git a/src/components/molecules/buttons/heading-button.stories.tsx b/src/components/molecules/buttons/heading-button.stories.tsx
index b0e1465..d1b5ed4 100644
--- a/src/components/molecules/buttons/heading-button.stories.tsx
+++ b/src/components/molecules/buttons/heading-button.stories.tsx
@@ -1,6 +1,5 @@
 import { ComponentMeta, ComponentStory } from '@storybook/react';
 import { useState } from 'react';
-import { IntlProvider } from 'react-intl';
 import HeadingButtonComponent from './heading-button';
 
 /**
@@ -10,6 +9,19 @@ export default {
   title: 'Molecules/Buttons/HeadingButton',
   component: HeadingButtonComponent,
   argTypes: {
+    className: {
+      control: {
+        type: 'text',
+      },
+      description: 'Set additional classnames to the button.',
+      table: {
+        category: 'Styles',
+      },
+      type: {
+        name: 'string',
+        required: false,
+      },
+    },
     expanded: {
       control: {
         type: null,
@@ -53,13 +65,6 @@ export default {
       },
     },
   },
-  decorators: [
-    (Story) => (
-      <IntlProvider locale="en">
-        <Story />
-      </IntlProvider>
-    ),
-  ],
 } as ComponentMeta<typeof HeadingButtonComponent>;
 
 const Template: ComponentStory<typeof HeadingButtonComponent> = ({
@@ -79,55 +84,21 @@ const Template: ComponentStory<typeof HeadingButtonComponent> = ({
 };
 
 /**
- * Heading Button Stories - Level 1
+ * Heading Button Stories - Expanded
  */
-export const Level1 = Template.bind({});
-Level1.args = {
-  level: 1,
-  title: 'Your title',
-};
-
-/**
- * Heading Button Stories - Level 2
- */
-export const Level2 = Template.bind({});
-Level2.args = {
+export const Expanded = Template.bind({});
+Expanded.args = {
+  expanded: true,
   level: 2,
   title: 'Your title',
 };
 
 /**
- * Heading Button Stories - Level 3
+ * Heading Button Stories - Collapsed
  */
-export const Level3 = Template.bind({});
-Level3.args = {
-  level: 3,
-  title: 'Your title',
-};
-
-/**
- * Heading Button Stories - Level 4
- */
-export const Level4 = Template.bind({});
-Level4.args = {
-  level: 4,
-  title: 'Your title',
-};
-
-/**
- * Heading Button Stories - Level 5
- */
-export const Level5 = Template.bind({});
-Level5.args = {
-  level: 5,
-  title: 'Your title',
-};
-
-/**
- * Heading Button Stories - Level 6
- */
-export const Level6 = Template.bind({});
-Level6.args = {
-  level: 6,
+export const Collapsed = Template.bind({});
+Collapsed.args = {
+  expanded: false,
+  level: 2,
   title: 'Your title',
 };
diff --git a/src/components/organisms/forms/comment-form.tsx b/src/components/organisms/forms/comment-form.tsx
index 5ff4ea4..b2c725f 100644
--- a/src/components/organisms/forms/comment-form.tsx
+++ b/src/components/organisms/forms/comment-form.tsx
@@ -1,6 +1,9 @@
 import Button from '@components/atoms/buttons/button';
 import Form, { type FormProps } from '@components/atoms/forms/form';
-import Heading, { type HeadingLevel } from '@components/atoms/headings/heading';
+import Heading, {
+  type HeadingProps,
+  type HeadingLevel,
+} from '@components/atoms/headings/heading';
 import Spinner from '@components/atoms/loaders/spinner';
 import LabelledField from '@components/molecules/forms/labelled-field';
 import { FC, ReactNode, useState } from 'react';
@@ -34,7 +37,11 @@ export type CommentFormProps = Pick<FormProps, 'className'> & {
    */
   title?: string;
   /**
-   * The title level.
+   * The form title alignment. Default: left.
+   */
+  titleAlignment?: HeadingProps['alignment'];
+  /**
+   * The title level. Default: 2.
    */
   titleLevel?: HeadingLevel;
 };
@@ -44,6 +51,7 @@ const CommentForm: FC<CommentFormProps> = ({
   parentId,
   saveComment,
   title,
+  titleAlignment,
   titleLevel = 2,
   ...props
 }) => {
@@ -117,7 +125,7 @@ const CommentForm: FC<CommentFormProps> = ({
       {...props}
     >
       {title && (
-        <Heading id={formId} level={titleLevel}>
+        <Heading id={formId} level={titleLevel} alignment={titleAlignment}>
           {title}
         </Heading>
       )}
diff --git a/src/components/organisms/layout/summary.module.scss b/src/components/organisms/layout/summary.module.scss
index 7e86dd2..62dfc0e 100644
--- a/src/components/organisms/layout/summary.module.scss
+++ b/src/components/organisms/layout/summary.module.scss
@@ -29,8 +29,11 @@
 
   &:hover {
     .icon {
-      transform: scaleX(1.4);
-      transform-origin: left;
+      --icon-size: #{fun.convert-px(35)};
+
+      :global {
+        animation: pulse 1.5s ease-in-out 0.2s infinite;
+      }
     }
   }
 }
diff --git a/src/components/templates/page/page-layout.module.scss b/src/components/templates/page/page-layout.module.scss
index 83e5a80..c6b4e8d 100644
--- a/src/components/templates/page/page-layout.module.scss
+++ b/src/components/templates/page/page-layout.module.scss
@@ -86,7 +86,14 @@
 
   &__section {
     grid-column: 2;
-    margin: var(--spacing-md) 0 0;
+
+    &:first-child {
+      margin: var(--spacing-md) 0 0;
+    }
+  }
+
+  &__no-comments {
+    text-align: center;
   }
 
   &__form {
diff --git a/src/components/templates/page/page-layout.tsx b/src/components/templates/page/page-layout.tsx
index f3f3ea8..2ff2084 100644
--- a/src/components/templates/page/page-layout.tsx
+++ b/src/components/templates/page/page-layout.tsx
@@ -1,6 +1,7 @@
 import Heading from '@components/atoms/headings/heading';
 import Notice, { type NoticeKind } from '@components/atoms/layout/notice';
 import Sidebar from '@components/atoms/layout/sidebar';
+import { MetaData } from '@components/molecules/layout/meta';
 import PageFooter, {
   type PageFooterProps,
 } from '@components/molecules/layout/page-footer';
@@ -118,10 +119,10 @@ const PageLayout: FC<PageLayoutProps> = ({
   const isMounted = useIsMounted(bodyRef);
 
   const hasComments = Array.isArray(comments) && comments.length > 0;
-  const hasCommentsSection = hasComments || allowComments;
-  const articleModifier = hasCommentsSection
-    ? 'article--has-comments'
-    : 'article--no-comments';
+  const articleModifier =
+    hasComments || allowComments
+      ? 'article--has-comments'
+      : 'article--no-comments';
 
   const [status, setStatus] = useState<NoticeKind>('info');
   const [statusMessage, setStatusMessage] = useState<string>('');
@@ -175,6 +176,15 @@ const PageLayout: FC<PageLayoutProps> = ({
     }
   };
 
+  /**
+   * Check if meta properties are defined.
+   *
+   * @param {MetaData} meta - The metadata.
+   */
+  const hasMeta = (meta: MetaData) => {
+    return Object.values(meta).every((value) => value === null);
+  };
+
   return (
     <Layout
       breadcrumbSchema={breadcrumbSchema}
@@ -218,7 +228,9 @@ const PageLayout: FC<PageLayoutProps> = ({
           {children}
         </div>
       )}
-      <PageFooter meta={footerMeta} className={styles.footer} />
+      {footerMeta && hasMeta(footerMeta) && (
+        <PageFooter meta={footerMeta} className={styles.footer} />
+      )}
       <Sidebar
         className={`${styles.sidebar} ${styles['sidebar--last']}`}
         aria-label={intl.formatMessage({
@@ -229,45 +241,54 @@ const PageLayout: FC<PageLayoutProps> = ({
       >
         {widgets}
       </Sidebar>
-      {hasCommentsSection && (
-        <div className={styles.comments}>
-          {hasComments && (
-            <section className={styles.comments__section}>
-              <Heading level={2}>{commentsTitle}</Heading>
+      {allowComments && (
+        <div className={styles.comments} id="comments">
+          <section className={styles.comments__section}>
+            <Heading level={2} alignment="center">
+              {commentsTitle}
+            </Heading>
+            {hasComments ? (
               <CommentsList
                 comments={comments}
                 depth={1}
                 Notice={
-                  isReplyRef.current === true ? (
+                  isReplyRef.current === true && (
                     <Notice
                       kind={status}
                       message={statusMessage}
                       className={styles.notice}
                     />
-                  ) : undefined
+                  )
                 }
                 saveComment={saveComment}
               />
-            </section>
-          )}
-          {allowComments && (
-            <section className={styles.comments__section}>
-              <CommentForm
-                className={styles.comments__form}
-                saveComment={saveComment}
-                title={commentFormTitle}
-                Notice={
-                  isReplyRef.current === false ? (
-                    <Notice
-                      kind={status}
-                      message={statusMessage}
-                      className={styles.notice}
-                    />
-                  ) : undefined
-                }
-              />
-            </section>
-          )}
+            ) : (
+              <p className={styles['comments__no-comments']}>
+                {intl.formatMessage({
+                  defaultMessage: 'No comments.',
+                  id: 'sBwfCy',
+                  description: 'PageLayout: no comments text',
+                })}
+              </p>
+            )}
+          </section>
+          <section className={styles.comments__section}>
+            <CommentForm
+              className={styles.comments__form}
+              saveComment={saveComment}
+              title={commentFormTitle}
+              titleAlignment="center"
+              Notice={
+                isReplyRef.current === false && (
+                  <Notice
+                    kind={status}
+                    message={statusMessage}
+                    className={styles.notice}
+                  />
+                )
+              }
+            />
+          </section>
         </div>
       )}
     </Layout>
diff --git a/src/pages/article/[slug].tsx b/src/pages/article/[slug].tsx
index 995e3a9..a0fb7fc 100644
--- a/src/pages/article/[slug].tsx
+++ b/src/pages/article/[slug].tsx
@@ -15,7 +15,10 @@ import { type Article, type Comment } from '@ts/types/app';
 import { loadTranslation, type Messages } from '@utils/helpers/i18n';
 import useAddPrismClassAttr from '@utils/hooks/use-add-prism-class-attr';
 import useBreadcrumb from '@utils/hooks/use-breadcrumb';
-import usePrismPlugins, { PrismPlugin } from '@utils/hooks/use-prism-plugins';
+import usePrismPlugins, {
+  type PrismPlugin,
+} from '@utils/hooks/use-prism-plugins';
+import useReadingTime from '@utils/hooks/use-reading-time';
 import useSettings from '@utils/hooks/use-settings';
 import { GetStaticPaths, GetStaticProps, NextPage } from 'next';
 import Head from 'next/head';
@@ -38,7 +41,16 @@ type ArticlePageProps = {
  */
 const ArticlePage: NextPage<ArticlePageProps> = ({ comments, post }) => {
   const { content, id, intro, meta, slug, title } = post;
-  const { author, commentsCount, cover, dates, seo, thematics, topics } = meta;
+  const {
+    author,
+    commentsCount,
+    cover,
+    dates,
+    seo,
+    thematics,
+    topics,
+    wordsCount,
+  } = meta;
   const { data } = useSWR(() => id, getPostComments, {
     fallbackData: comments,
   });
@@ -46,11 +58,13 @@ const ArticlePage: NextPage<ArticlePageProps> = ({ comments, post }) => {
     title,
     url: `/article/${slug}`,
   });
+  const readingTime = useReadingTime(wordsCount || 0, true);
 
   const headerMeta: PageLayoutProps['headerMeta'] = {
     author: author?.name,
     publication: { date: dates.publication },
     update: dates.update ? { date: dates.update } : undefined,
+    readingTime,
     thematics:
       thematics &&
       thematics.map((thematic) => (
diff --git a/src/styles/pages/article.module.scss b/src/styles/pages/article.module.scss
index a42c633..04acad9 100644
--- a/src/styles/pages/article.module.scss
+++ b/src/styles/pages/article.module.scss
@@ -31,6 +31,7 @@
   @include mix.media("screen") {
     @include mix.dimensions("md") {
       width: min-content;
+      gap: var(--spacing-2xs);
     }
   }
 }