solution

src/App.css

@@ -17,90 +17,3 @@ body {
   margin: 0;
   background: #eee;
 }
-
-.welcome {
-  height: 100vh;
-  background: coral;
-}
-
-.welcome__text {
-  margin: 0;
-  font-size: 400%;
-  text-align: center;
-  line-height: 1;
-  padding-top: calc(50vh - 20pt);
-  display: block;
-  font-weight: 700;
-}
-
-.header {
-  width: 100%;
-  padding: 1em;
-  font-size: 140%;
-  position: sticky;
-  top: 0;
-  left: 0;
-  right: 0;
-  transition: opacity 0.2s ease-in-out;
-  text-align: center;
-}
-
-.header__title {
-  font-weight: 600;
-  display: inline;
-  margin: 0;
-  padding: 0;
-  font-size: inherit;
-}
-
-.navigation__link {
-  display: inline-block;
-  outline: none;
-  text-decoration: none;
-  opacity: 0.7;
-  padding: 0 0.5em;
-  color: black;
-  transition: opacity 0.2s ease-in-out;
-}
-
-.navigation__link:hover,
-.navigation__link:focus {
-  opacity: 1;
-}
-
-.article {
-  margin: 5em auto 0;
-  padding: 1em;
-  font-size: 140%;
-  max-width: 800px;
-  background: white;
-  box-shadow: rgba(0, 0, 0, 0.05) 0 3px 15px;
-}
-
-.article__paragraph {
-  margin: 0;
-  color: #333;
-}
-
-.article__paragraph:not(:first-child) {
-  margin-top: 0.7em;
-}
-
-@media (min-width: 500px) {
-  .header {
-    text-align: left;
-    display: flex;
-    justify-content: space-between;
-  }
-
-  .article {
-    margin: 3.5em auto 0;
-    padding: 2em;
-  }
-}
-
-@media (min-width: 800px) {
-  .article {
-    margin: 3.5em auto;
-  }
-}

src/App.jsx

@@ -1,86 +1,15 @@
 import React from 'react';
 import './App.css';
-// Move each BEM block to a separate component (file) and import them here
+import Header from './components/Header/Header';
+import Article from './components/Article/Article';
+import Welcome from './components/Welcome/Welcome';
 
 function App() {
   return (
     <main className="app">
-      <section className="welcome">
-        <span className="welcome__text">Sticky Header!</span>
-      </section>
-      <header className="header">
-        <h1 className="header__title">Site Name</h1>
-        <nav className="navigation">
-          <a className="navigation__link" href="#about">
-            About
-          </a>
-          <a className="navigation__link" href="#services">
-            Services
-          </a>
-          <a className="navigation__link" href="#contact">
-            Contact
-          </a>
-        </nav>
-      </header>
-      <article className="article">
-        <h1 className="article__title">Headline</h1>
-        <p className="article__paragraph">
-          In elementum lorem eget est euismod ornare. Phasellus sit amet
-          pellentesque mauris. Aliquam quis malesuada ex. Nullam eu aliquam
-          nibh. Mauris molestie, urna accumsan ornare semper, augue nibh posuere
-          lorem, vitae feugiat sem magna eget massa. Vivamus quis tincidunt
-          dolor. Fusce efficitur, orci non vestibulum consequat, lectus turpis
-          bibendum odio, in efficitur leo felis sed justo. Fusce commodo iaculis
-          orci, quis imperdiet urna. Sed mollis facilisis lacus non condimentum.
-          Nunc efficitur massa non neque elementum semper. Vestibulum lorem
-          arcu, tincidunt in quam et, feugiat venenatis augue. Donec sed
-          tincidunt tellus, a facilisis magna. Proin sit amet viverra nibh,
-          bibendum gravida felis. Vivamus ut nunc id mauris posuere
-          pellentesque. Praesent tincidunt id odio id feugiat.
-        </p>
-        <p className="article__paragraph">
-          In ac nisi lacus. Fusce est dolor, tincidunt ut bibendum vitae,
-          fermentum ac quam. Aliquam pretium tristique nibh quis iaculis. In et
-          cursus ex, eu aliquet ex. Proin facilisis lacus sit amet sapien
-          ultrices, ut vehicula arcu lobortis. Vivamus mollis ipsum ut hendrerit
-          molestie. Morbi lacinia, sapien eu dictum dignissim, tellus tortor
-          congue magna, sit amet bibendum libero nisi id massa.
-        </p>
-        <p className="article__paragraph">
-          Donec arcu elit, euismod vel lobortis eu, fringilla sit amet dolor.
-          Cras congue, massa nec sagittis mollis, dui felis ultrices magna,
-          tincidunt finibus lorem quam in sem. Morbi odio turpis, pulvinar sit
-          amet vulputate quis, ultricies eu libero. Donec ac maximus neque, nec
-          maximus nibh. Morbi rhoncus convallis urna, accumsan porta lorem
-          hendrerit in. Cras eget nisl dui. Morbi faucibus nisi eget ipsum
-          semper vulputate. Mauris nec tincidunt lectus. Aenean ac mi consequat
-          velit dignissim consectetur. Fusce placerat ac ipsum ac eleifend.
-          Aenean quis faucibus ex.
-        </p>
-        <p className="article__paragraph">
-          Cras egestas tempor nibh, a fermentum lorem sollicitudin non. Nulla
-          facilisi. In at elit id leo tristique condimentum. Donec at est nulla.
-          Mauris egestas magna ut laoreet pretium. Sed ultrices suscipit
-          vestibulum. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
-          Fusce id sapien eros. Vivamus viverra ultricies gravida. Nam urna
-          nibh, blandit a vulputate at, vehicula non nulla. Aenean ut nulla leo.
-          Praesent in ullamcorper est.
-        </p>
-        <p className="article__paragraph">
-          Pellentesque habitant morbi tristique senectus et netus et malesuada
-          fames ac turpis egestas. Phasellus bibendum nec arcu eu lobortis. Nam
-          convallis faucibus ante sed porta. Nullam ut convallis elit, quis
-          venenatis nunc. Curabitur sed sem eget velit condimentum rutrum in et
-          orci. Nunc non suscipit eros. Suspendisse porta sem vel justo commodo
-          dictum. Aliquam erat ligula, fringilla nec suscipit sed, porta vitae
-          turpis. Vestibulum rhoncus placerat nulla vitae suscipit. Curabitur
-          consectetur ex ut odio tristique vehicula. Ut ligula tortor, tincidunt
-          quis sodales vitae, ornare a turpis. Proin sit amet finibus enim.
-          Fusce tempus a neque vitae tempor. Aenean rutrum, libero iaculis
-          interdum vulputate, dui eros vehicula nisi, at interdum enim lacus eu
-          diam.
-        </p>
-      </article>
+      <Welcome />
+      <Header />
+      <Article />
     </main>
   );
 }

src/components/Article/Article.css

@@ -1 +1,30 @@
-/* Put article styles here */
+.article {
+  margin: 5em auto 0;
+  padding: 1em;
+  font-size: 140%;
+  max-width: 800px;
+  background: white;
+  box-shadow: rgba(0, 0, 0, 0.05) 0 3px 15px;
+}
+
+.article__paragraph {
+  margin: 0;
+  color: #333;
+}
+
+.article__paragraph:not(:first-child) {
+  margin-top: 0.7em;
+}
+
+@media (min-width: 500px) {
+  .article {
+    margin: 3.5em auto 0;
+    padding: 2em;
+  }
+}
+
+@media (min-width: 800px) {
+  .article {
+    margin: 3.5em auto;
+  }
+}

src/components/Article/Article.jsx

@@ -1,5 +1,66 @@
-// import a css file containig article styles
+import './Article.css';
 
-// Create an Article function returning the HTML of article block
+function Article() {
+  return (
+    <article className="article">
+      <h1 className="article__title">Headline</h1>
+      <p className="article__paragraph">
+        In elementum lorem eget est euismod ornare. Phasellus sit amet
+        pellentesque mauris. Aliquam quis malesuada ex. Nullam eu aliquam nibh.
+        Mauris molestie, urna accumsan ornare semper, augue nibh posuere lorem,
+        vitae feugiat sem magna eget massa. Vivamus quis tincidunt dolor. Fusce
+        efficitur, orci non vestibulum consequat, lectus turpis bibendum odio,
+        in efficitur leo felis sed justo. Fusce commodo iaculis orci, quis
+        imperdiet urna. Sed mollis facilisis lacus non condimentum. Nunc
+        efficitur massa non neque elementum semper. Vestibulum lorem arcu,
+        tincidunt in quam et, feugiat venenatis augue. Donec sed tincidunt
+        tellus, a facilisis magna. Proin sit amet viverra nibh, bibendum gravida
+        felis. Vivamus ut nunc id mauris posuere pellentesque. Praesent
+        tincidunt id odio id feugiat.
+      </p>
+      <p className="article__paragraph">
+        In ac nisi lacus. Fusce est dolor, tincidunt ut bibendum vitae,
+        fermentum ac quam. Aliquam pretium tristique nibh quis iaculis. In et
+        cursus ex, eu aliquet ex. Proin facilisis lacus sit amet sapien
+        ultrices, ut vehicula arcu lobortis. Vivamus mollis ipsum ut hendrerit
+        molestie. Morbi lacinia, sapien eu dictum dignissim, tellus tortor
+        congue magna, sit amet bibendum libero nisi id massa.
+      </p>
+      <p className="article__paragraph">
+        Donec arcu elit, euismod vel lobortis eu, fringilla sit amet dolor. Cras
+        congue, massa nec sagittis mollis, dui felis ultrices magna, tincidunt
+        finibus lorem quam in sem. Morbi odio turpis, pulvinar sit amet
+        vulputate quis, ultricies eu libero. Donec ac maximus neque, nec maximus
+        nibh. Morbi rhoncus convallis urna, accumsan porta lorem hendrerit in.
+        Cras eget nisl dui. Morbi faucibus nisi eget ipsum semper vulputate.
+        Mauris nec tincidunt lectus. Aenean ac mi consequat velit dignissim
+        consectetur. Fusce placerat ac ipsum ac eleifend. Aenean quis faucibus
+        ex.
+      </p>
+      <p className="article__paragraph">
+        Cras egestas tempor nibh, a fermentum lorem sollicitudin non. Nulla
+        facilisi. In at elit id leo tristique condimentum. Donec at est nulla.
+        Mauris egestas magna ut laoreet pretium. Sed ultrices suscipit
+        vestibulum. Lorem ipsum dolor sit amet, consectetur adipiscing elit.
+        Fusce id sapien eros. Vivamus viverra ultricies gravida. Nam urna nibh,
+        blandit a vulputate at, vehicula non nulla. Aenean ut nulla leo.
+        Praesent in ullamcorper est.
+      </p>
+      <p className="article__paragraph">
+        Pellentesque habitant morbi tristique senectus et netus et malesuada
+        fames ac turpis egestas. Phasellus bibendum nec arcu eu lobortis. Nam
+        convallis faucibus ante sed porta. Nullam ut convallis elit, quis
+        venenatis nunc. Curabitur sed sem eget velit condimentum rutrum in et
+        orci. Nunc non suscipit eros. Suspendisse porta sem vel justo commodo
+        dictum. Aliquam erat ligula, fringilla nec suscipit sed, porta vitae
+        turpis. Vestibulum rhoncus placerat nulla vitae suscipit. Curabitur
+        consectetur ex ut odio tristique vehicula. Ut ligula tortor, tincidunt
+        quis sodales vitae, ornare a turpis. Proin sit amet finibus enim. Fusce
+        tempus a neque vitae tempor. Aenean rutrum, libero iaculis interdum
+        vulputate, dui eros vehicula nisi, at interdum enim lacus eu diam.
+      </p>
+    </article>
+  );
+}
 
-// Add a default export statement for Article component to use it in the other files
+export default Article;

src/components/Header/Header.css

@@ -1 +1,27 @@
-/* Put header styles here */
+.header {
+  width: 100%;
+  padding: 1em;
+  font-size: 140%;
+  position: sticky;
+  top: 0;
+  left: 0;
+  right: 0;
+  transition: opacity 0.2s ease-in-out;
+  text-align: center;
+}
+
+.header__title {
+  font-weight: 600;
+  display: inline;
+  margin: 0;
+  padding: 0;
+  font-size: inherit;
+}
+
+@media (min-width: 500px) {
+  .header {
+    text-align: left;
+    display: flex;
+    justify-content: space-between;
+  }
+}

src/components/Header/Header.jsx

@@ -1,5 +1,13 @@
-// import a css file containig header styles
+import Navigation from '../Navigation/Navigation';
+import './Header.css';
 
-// Create a Header function returning the HTML of header block
+function Header() {
+  return (
+    <header className="header">
+      <h1 className="header__title">Site Name</h1>
+      <Navigation />
+    </header>
+  );
+}
 
-// Add a default export statement for Header component to use it in the other files
+export default Header;

src/components/Navigation/Navigation.css

@@ -0,0 +1,14 @@
+.navigation__link {
+  display: inline-block;
+  outline: none;
+  text-decoration: none;
+  opacity: 0.7;
+  padding: 0 0.5em;
+  color: black;
+  transition: opacity 0.2s ease-in-out;
+}
+
+.navigation__link:hover,
+.navigation__link:focus {
+  opacity: 1;
+}

src/components/Navigation/Navigation.jsx

@@ -0,0 +1,19 @@
+import './Navigation.css';
+
+function Navigation() {
+  return (
+    <nav className="navigation">
+      <a className="navigation__link" href="#about">
+        About
+      </a>
+      <a className="navigation__link" href="#services">
+        Services
+      </a>
+      <a className="navigation__link" href="#contact">
+        Contact
+      </a>
+    </nav>
+  );
+}
+
+export default Navigation;

src/components/Welcome/Welcome.css

@@ -1 +1,14 @@
-/* Put welcome styles here */
+.welcome {
+  height: 100vh;
+  background: coral;
+}
+
+.welcome__text {
+  margin: 0;
+  font-size: 400%;
+  text-align: center;
+  line-height: 1;
+  padding-top: calc(50vh - 20pt);
+  display: block;
+  font-weight: 700;
+}

src/components/Welcome/Welcome.jsx

@@ -1,5 +1,11 @@
-// import a css file containig welcome styles
+import './Welcome.css';
 
-// Create a Welcome function returning the HTML of welcome block
+function Welcome() {
+  return (
+    <section className="welcome">
+      <span className="welcome__text">Sticky Header!</span>
+    </section>
+  );
+}
 
-// Add a default export statement for Welcome component to use it in the other files
+export default Welcome;