diff --git a/index.html b/index.html
index 76254c13..c4168396 100644
--- a/index.html
+++ b/index.html
@@ -20,7 +20,7 @@
   </head>
 
   <body>
-    <div class="header">
+    <header class="header">
 
         <a href="#">
           <img
@@ -30,7 +30,7 @@
           />
         </a>
 
-        <div>
+        <nav>
           <ul class="navigation__list">
             <li class="navigation__item">
               <a class="navigation__link" href="#">Home</a>
@@ -45,34 +45,34 @@
               <a class="navigation__link" href="#">Contact Us</a>
             </li>
           </ul>
-        </div>
+        </nav>
 
-        <button>Donate Now</button>
+        <button class="btn_donate">Donate Now</button>
 
-    </div>
+    </header>
 
-    <div class="content">
-        <div class="main">
+    <main class="content">
+        <section class="main">
           <div class="alert">
             You've helped us give <span class="text-highlight">72</span> bikes
             to refugees and asylum seekers so far. <strong>Thank you!</strong>
           </div>
 
-          <div class="hero">
+          <section class="hero">
             <h1>Bikes for Refugees</h1>
             <p>
               Providing donated bikes and accessories to refugees and asylum
               seekers in Scotland.
             </p>
-            <button>Donate a bike today</button>
-            <button>Volunteer</button>
-          </div>
+            <button class="btn_header_donate">Donate a bike today</button>
+            <button class="btn_header_volunteer">Volunteer</button>
+          </section>
 
-          <div>
+          <section>
             <h2 class="heading-underline">Learn more</h2>
 
-            <div>
-              <div class="article">
+            <section>
+              <article class="article">
                 <h3 class="article__title">Why do refugees need bikes?</h3>
                 <p class="article__summary">
                   Many refugees are placed in housing in areas where there are
@@ -85,9 +85,9 @@ <h3 class="article__title">Why do refugees need bikes?</h3>
                     Learn more
                   </a>
                 </p>
-              </div>
+              </article>
 
-              <div class="article">
+              <article class="article">
                 <h3 class="article__title">How can I help?</h3>
                 <p class="article__summary">
                   We need lots of bikes and bike accessories! If you have an
@@ -100,21 +100,21 @@ <h3 class="article__title">How can I help?</h3>
                     Learn more
                   </a>
                 </p>
-              </div>
-            </div>
-          </div>
-        </div>
+              </article>
+            </section>
+          </section>
+        </section>
 
-        <div class="sidebar">
+        <aside class="sidebar">
           <h2 class="heading-underline">Upcoming events</h2>
 
-          <div class="article">
-            <img
+          <section class="article">
+            <img 
               class="article__thumbnail"
-              src="spring-fundraisers_thumbnail.jpg"
-              alt=""
+              src="images/spring-fundraisers_thumbnail.jpg"
+              alt="Spring blossom branch"
             />
-            <div class="article__content">
+            <article class="article__content">
               <h3 class="article__title">
                 <a class="article__title-link" href="#">Join us for our Spring fundraisers</a>
               </h3>
@@ -122,29 +122,29 @@ <h3 class="article__title">
                 Riders needed now to help raise awareness and funds for BfR and
                 Médecins Sans Frontières.
               </p>
-            </div>
-          </div>
+            </article>
+          </section>
 
-          <div class="article">
+          <section class="article">
             <img
               class="article__thumbnail"
-              src="bikes-for-refugees_logo.jpg"
-              alt=""
+              src="images/bikes-for-refugees_logo.jpg"
+              alt="Logo for Bikes for Refugees Scotland"
             />
-            <div class="article__content">
+            <article class="article__content">
               <h3 class="article__title">
                 <a class="article__title-link" href="#">Bike dropoff event in Edinburgh on May 11</a>
               </h3>
-            </div>
-          </div>
+            </article>
+          </section>
 
-          <div class="article">
+          <section class="article">
             <img
               class="article__thumbnail"
-              src="edinburgh-damascus_thumbnail.png"
-              alt=""
+              src="images/edinburgh-damascus_thumbnail.png"
+              alt="Sign direction"
             />
-            <div class="article__content">
+            <article class="article__content">
               <h3 class="article__title">
                 <a class="article__title-link" href="#">Help us cycle 4,797km</a>
               </h3>
@@ -152,28 +152,29 @@ <h3 class="article__title">
                 We need you to help us cycle 4797km, the distance of Edinburgh
                 to Damascus.
               </p>
-            </div>
-          </div>
+            </article>
+          </section>
 
           <a
             href="https://www.facebook.com/BikesforRefugeesScotland/events/?ref=page_internal"
             target="_blank"
             class="facebook-link"
+            rel="noopener"
           >
             <span class="fa fa-facebook-square"></span>
             All Facebook events
           </a>
-        </div>
-    </div>
+        </aside>
+    </main>
 
-    <div class="footer">
-      <div class="footer__content">
+    <footer class="footer">
+      <section class="footer__content">
         <p>
           <strong>Bikes for Refugees Scotland is a volunteer-led project to help
           people explore and make connections with their local communities.</strong>
         </p>
         <p>Website by Code Your Future</p>
-      </div>
-    </div>
+      </section>
+    </footer>
   </body>
 </html>
diff --git a/styles/style.css b/styles/style.css
index 4d1c088e..70303d8f 100644
--- a/styles/style.css
+++ b/styles/style.css
@@ -63,10 +63,11 @@ p {
 .navigation__list {
   display: flex;
   list-style: none;
+ 
 }
 
 .navigation__item {
-  padding: 0.5rem 0;
+  padding: 0.5rem 1rem;
 }
 
 .navigation__link {
@@ -76,6 +77,11 @@ p {
   text-decoration: none;
 }
 
+.navigation__link:hover,
+.navigation__link:focus {
+  color: var(--orange-dark);
+  }
+
 
 /* Text styles */
 
@@ -95,14 +101,55 @@ p {
 
 /* Buttons */
 
-  /* INSERT BUTTON STYLES HERE */
+.btn_donate, .btn_header_donate {
+  background-color: var(--orange-dark);
+  color: var(--white);
+  font-weight: 600;
+  border: none;
+  border-radius: 4px;
+  padding: 8px 10px;
+  text-align: center;
+  margin: 4px 2px;
+  cursor: pointer;
+}
+
+.btn_header_volunteer {
+  background-color: var(--white);
+  color: var(--orange-dark);
+  font-weight: 600;
+  border: none;
+  border-radius: 4px;
+  padding: 8px 10px;
+  text-align: center;
+  margin: 4px 2px;
+  cursor: pointer;
+}
+
+
+.btn_header_volunteer:hover {
+  background-color: var(--grey-light);
+  border-color: var(--grey-light);
+  color: var(--grey-dark);
+}
+.btn_donate:hover {
+  background-color: var(--grey-light);
+  border-color: var(--grey-light);
+  color: var(--grey-dark);
+}
+.btn_header_donate:hover {
+  background-color: var(--grey-light);
+  border-color: var(--grey-light);
+  color: var(--grey-dark);
+}
 
 
 /* Content */
 
 .content {
   display: flex;
-  flex-direction: column;
+  flex-direction: row;
+  gap: 2rem;
+  padding: 2rem;
 }
 
 /* Alert */
@@ -114,24 +161,31 @@ p {
   font-size: 0.85rem;
   line-height: 1.3;
   padding: 1.5rem 1rem;
-  margin-bottom: 2rem;
+  margin-bottom: 3rem;
 }
 
 /* hero */
 
 .hero {
-  background-image: url("header-bike.jpg");
+  background-image: url("../images/header-bike.jpg");
   background-color: var(--grey-light);
+  padding: 80px 40px;
+  margin-bottom: 50px;
+  margin-top: 50px;
+
 }
 
 .hero h1 {
   margin-bottom: 1rem;
   font-size: 2.5rem;
+  color: var(--white);
+
 }
 
 .hero p {
   font-size: 1.2rem;
   margin-bottom: 2rem;
+  color: var(--white);
 }
 
 
@@ -161,8 +215,24 @@ p {
 
 /* Article */
 
+.sidebar .article {
+  margin-bottom: 1rem;
+  border: 1px solid var(--grey-light);
+  border-radius: 4px;
+  padding: 1rem 1.5rem;
+  gap: 1rem;
+  display: flex;
+
+}
+
 .article {
   margin-bottom: 1rem;
+  border: 1px solid var(--grey-light);
+  border-radius: 4px;
+  padding: 1rem 1.5rem;
+  gap: 1rem;
+  justify-content: center;
+
 }
 
 .article__title {
@@ -211,12 +281,19 @@ p {
   color: var(--orange-dark);
 }
 
+/* Main */
+.main {
+  flex: 3;
+}
+
 /* Sidebar */
 
 .sidebar {
   display: flex;
+  flex: 1;
   flex-direction: column;
   min-width: 350px;
+  gap: 1.5rem;
 }
 
 /* Footer */
